I. Large-scale technological transformation has driven the technological advancement of heat treatment equipment

　　There is an old Chinese saying: "If you want to do a good job, you must first sharpen your tools." The development of the machinery industry shows that advanced equipment and manufacturing technologies are the key to the modernization of the machinery industry. Heat treatment equipment and process technology are "sharp tools" used to improve the intrinsic performance of mechanical products, and are an indispensable part of advanced mechanical equipment.

　　Ten years ago, the technological equipment of China's heat treatment industry was still very backward. At that time, although there were no less than hundreds of thousands of heat treatment equipment nationwide, the proportion of advanced equipment such as controllable atmosphere accounted for less than 10%. In most heat treatment enterprises, the heat treatment sites were filled with old three furnaces (box-type, pit-type, salt bath furnace) with a service life of 30 to 40 years. Heat treatment processing was mostly manual, and the heat treatment quality was difficult to guarantee. The phenomenon of "three highs and one low" (high energy consumption, high pollution, high cost, low quality) was heartbreaking.

　　In order to change the backward appearance of China's heat treatment industry, under the promotion of the national low-carbon, energy-saving and emission reduction policies, and especially driven by the large-scale technological transformation of the automobile, aviation, shipbuilding, light rail, high-speed railway, heavy-duty machinery and wind power industries, China's heat treatment industry has been undergoing gratifying changes in recent years. These changes are mainly reflected in the following aspects:

　　1. The large-scale technological transformation and equipment upgrades of these enterprises have fundamentally changed the proportion of advanced equipment. The proportion of equipment such as controllable atmosphere and protective atmosphere has reached more than 90%. Advanced heat treatment production with less oxidation, less pollution, less deformation, less waste products, less manual labor, and less quality dispersion has been basically achieved.

　　2. These new heat treatment equipment generally use energy-saving materials and imported components. The application of a large number of advanced control instruments, components, and pipe valves and switches from international brands has improved the reliability of the equipment and improved the intelligent and unmanned control and management level of heat treatment.

　　3. In recent years, the promulgation and implementation of national standards, industry standards, and enterprise standards using international advanced indicators have promoted the continuous updating and technological progress of heat treatment equipment and processes. It has improved the efficiency of heat treatment production, and at the same time promoted energy consumption reduction, and reduced and curbed the emission of three wastes.

　　Among the equipment selected by these technologically transformed enterprises, some are advanced equipment imported at high prices, some are wholly foreign-owned, and some are produced by domestic enterprises. It is noteworthy that these domestically produced equipment, competing with imported and wholly foreign-owned products, have achieved remarkable results. In terms of performance indicators, reliability, energy consumption indicators, and automation level, they are comparable to imported equipment, and even many indicators are superior to wholly foreign-owned products. The price of domestically produced equipment is much lower than that of imported and wholly foreign-owned products, resulting in significant savings in capital investment and operating costs for technologically transformed enterprises.

　　The large-scale technological transformation measures of many large domestic enterprises are quietly rewriting the history of the current situation of heat treatment in China. At present, although these advanced heat treatment equipment have not yet been well popularized throughout the country, we are confident that as long as we are committed to promotion, committed to continuous improvement and improvement of the performance of heat treatment equipment, and committed to providing high-quality services to users, we believe that in the near future, advanced domestic equipment will surely replace those old three furnaces, turning energy-intensive users into energy-saving pacesetters, and polluting enterprises into clean factories, enabling China's heat treatment industry to eventually reach the forefront of the world.

　　II. Tianlong Company is committed to the manufacturing of "sharp tools"

　　As a private high-tech enterprise, Tianlong (TLON) Company, from the day it was founded, has taken the manufacturing of "precise, energy-saving, and environmentally friendly" heat treatment equipment as its lofty mission. In the process of product development, the company has put forward the research and development direction of "three hundred percent" for its self-developed products: (1) 100% of products use controllable atmosphere and protective atmosphere; (2) 100% of furnace linings use energy-saving materials; (3) 100% of key supporting components use internationally renowned components. It is wholeheartedly committed to the research and development of highly automated, high-precision, high-reliability, environmentally friendly, clean and energy-saving heat treatment equipment. In discussions with customers, it always strictly demands itself with advanced domestic and international standards and insists on providing users with the best heat treatment equipment.

　　The company has always adhered to the path of independent development and building TLON's core technology, possessing multiple patented technologies and solving technical problems in energy saving, efficiency, environmental protection, and safety in controllable atmosphere heat treatment equipment and processes. It has formed a core competitiveness combining products and technology patents.

　　In order to continuously improve the technical level of its products, Tianlong (TLON) Company cooperates with German STANGE Company, German PE Company, American CEC Company, and Canadian NITREX Company to continuously introduce and apply the latest and most advanced technologies internationally, developing and researching energy-saving new products suitable for Chinese conditions.

　　In the eight years since its establishment, the company has provided hundreds of sets of technologically advanced energy-saving products to users, winning high praise from users. Tianlong's leading product, the "large-scale controllable atmosphere pit-type carburizing furnace production line", currently occupies more than 70% of the domestic market share. It has served national key large enterprises such as "Nanjing High-Gear, Double-Two, Baosteel Suzhou Metallurgy, Hangzhou Gear, Wanxiang Bearing, CITIC Heavy Machinery, Zhenhua Heavy Industry, China Steel Heavy Machinery, Northern Heavy Industry, Qin Chuan Development, and Dalian Huarui". These enterprises have significantly reduced heat treatment energy consumption and reduced environmental pollution. The national industry standard "Technical Requirements for Large-Scale Controllable Atmosphere Pit-Type Carburizing Furnace Production Line Heat Treatment", drafted by Tianlong Company, has passed the review of the State Bureau of Standards and the industry, and will be officially promulgated in 2010.

　　Tianlong's main energy-saving products also include controllable atmosphere multi-purpose furnace production lines (sealed box-type, through-type, bottom-loading vertical), controllable atmosphere nitriding furnace production lines (sealed box-type, pit-type, hood-type), controllable atmosphere pusher furnace production lines, protective atmosphere salt quenching bainite production lines, controllable atmosphere roller hearth furnaces, roller hearth furnaces, mesh belt furnace production lines, and other heat treatment equipment and auxiliary facilities.

　　Many of Tianlong's products have passed national professional appraisal, and their technical performance has reached the current international advanced level.

　　Tianlong Company has passed ISO9001-2008 quality management system and ISO14001-2004 environmental management system certifications, and has formed a rigorous, scientific, and comprehensive management system. It has successively won honorary titles such as the "Advanced Unit for Energy Saving and Emission Reduction" from the National Heat Treatment Industry Association, the "Quality Trustworthy Enterprise", the "Technological Transformation Contribution Award", and the "Science and Technology Innovation Award" awarded by the Heat Treatment Branch of the Chinese Society of Mechanical Engineering.

　　III. Introduction of Tianlong Company's main precise, energy-saving, and environmentally friendly products

　　(1) Large energy-saving controllable atmosphere pit-type carburizing furnace

　　1. Uses: Mainly used for the precise heat treatment of transmission parts of large-scale heavy-duty machinery, it can also be used for carburizing heat treatment of small and medium-sized parts with the maximum furnace load. Complete technical specifications, working area size: diameter φ1000～φ4000, height 1000～6000mm, maximum load: 2～58t, heating capacity: 250～2000kg.

　　2. Main features:

　　⑴The successful application of various special heat-resistant steel structure technologies in large well-type carburizing furnaces, including spherical dome-shaped air guiding cover, full corrugated muffle and guide tube, freely suspended air guiding hood, and open furnace cover insulation package, has solved problems such as thermal stress deformation and cracking of heat-resistant steel structural parts at high temperatures, increasing the service life by more than 3 times compared to conventional structures. Many technologies in this furnace are innovative designs with independent intellectual property rights and have been applied for technical patents.

　　The large controllable atmosphere well-type carburizing furnace won the Science and Technology Innovation Award from the China Heat Treatment Society and the Jiangsu Provincial High-tech Product Award in 2009.

　　⑵Using all-fiber furnace lining, optimized design, reasonable heating power configuration, and improved heating element component structure, it can save about 25% of electricity compared to conventional carburizing furnaces with the same furnace load, and more than 50% less electricity consumption than small RQ3 conventional carburizing furnaces. The energy-saving effect is significant, and the energy consumption standard has been significantly reduced compared to the old standard. The electricity consumption of Tianlong products is lower than the new standard, especially after the layer depth is increased, the energy saving is more obvious. Tests on multiple products show that the larger the furnace type and the larger the loading capacity, the lower the unit electricity consumption. For example, the loading capacity of φ2.0X2.0 is twice that of φ1.3X2.0, the electricity consumption of layer depth 1.5 is only 0.541kwh, and the electricity consumption of layer depth 3.3 is as low as 0.79kwh, only one-third of the old product. This indicator is close to the most advanced Japanese energy consumption indicator.

　　⑶Using an advanced intelligent control system. Temperature control of main control + linkage control + monitoring, multi-system, multi-mode, and multi-parameter carbon potential control, integrated intelligent control system, and complete interlocking alarm system enable precise control of large workpieces at high temperatures and high carbon potential. It not only meets the quality requirements of workpiece carburizing layer depth and microstructure, but also improves carburizing speed, shortens process time, saves electricity and process materials, and significantly reduces operating costs.

　　3. Main Conclusions of Technical Appraisal

　　Appraised by the China Heat Treatment Industry Association, experts unanimously agreed that the RQD series of large controllable atmosphere well-type carburizing furnaces have stable and reliable product quality, small heat storage, fast heating and cooling speeds, and high efficiency and energy saving. It can achieve precise control of the carburizing hardening layer and microstructure of the product, reaching the advanced technical level of similar international equipment.

　　4. Promotion Prospects and Energy-Saving Benefits

　　⑴For large well-type carburizing furnaces, calculating the heat loss at 0.156kw/㎡ based on the reduction of furnace wall surface temperature rise from 50℃ to 40℃, and the annual operating time of the φ3.2×2.0 well-type carburizing furnace with a furnace wall surface area of approximately 110㎡ at 7200 hours, this alone can reduce the electricity consumption of furnace wall heat loss by 124,000 degrees per year.

　　Except for the furnace bottom, which needs to use refractory insulation bricks for load-bearing, the furnace wall of the well-type carburizing furnace is changed from the traditional refractory insulation brick structure to an all-fiber structure. The φ3.2×2.0 well-type carburizing furnace wall uses refractory insulation bricks, and the furnace wall heat storage reaches 2016kw. If changed to an all-fiber structure, the furnace wall heat storage is only 506kw. Based on an annual operating time of 300 days and one furnace cycle every 4 days, this alone can reduce the heat loss of heat storage by about 113,000 degrees per year.

　　The above two items, plus the all-fiber structure of the furnace cover, the strength design structure of the muffle, etc., the heating element installation structure, and the reasonable handling of various thermal short circuits, can reduce the electricity consumption of the φ3.2×2.0 well-type carburizing furnace by about 350,000 degrees per year.

　　⑵The conventional carburizing process usually has a carburizing temperature of 920℃ and a carbon potential of less than 1.1%C. Due to the significant improvement in the accuracy and methods of temperature and carbon potential control, the RQD large well-type carburizing furnace can perform carburizing at higher temperatures and higher carbon potentials during the carburizing process, not only ensuring product quality but also significantly shortening the carburizing process time.

　　In fact, the carbon potential can be increased to 1.25%C for strong carburizing, and the total process cycle can be shortened by at least 20%, greatly improving equipment utilization and significantly reducing overall energy consumption.

　　The large controllable atmosphere well-type carburizing furnace of Tianlong Company has been successfully used in the actual production of a certain company at a carburizing temperature of 960℃~970℃ and a carbon potential of 1.35%C~1.40%C.

　　⑶This type of equipment not only meets the carburizing heat treatment of large workpieces, but also, as long as the requirements of the same material and similar carburizing layer depth are met, it can also achieve the maximum furnace load for carburizing heat treatment of small and medium-sized workpieces.

　　With the promotion of hard surface treatment technology for large heavy-duty machinery transmission parts and the continuous advancement of the new round of energy-saving and emission-reduction technological transformation, the market demand for this type of equipment will rapidly expand, and the annual demand is expected to exceed 100 sets, with an output value of 200 million yuan.

　　Based on the estimated 800 sets of large well-type carburizing furnaces in China by 2015, the total annual electricity saving can reach more than 280 million kWh.

　　(II) Large Energy-Saving Controllable Atmosphere Bell-Type Nitriding Furnace

　　1. Uses: Mainly used for surface nitriding, nitrocarburizing, pre-oxidation, and post-oxidation of products such as gears, shafts, and molds. Complete technical specifications, working area size: diameter φ1000～φ4000, height 1000～6000mm, maximum load: 2～75t, heating capacity: 350～2800kg.

　　2. Basic Situation:

　　(1) At present, most of the gas nitriding furnaces used in China generally use ammonia decomposition instruments to control the nitrogen potential, or purely use manual methods to control the nitrogen potential. These nitriding furnaces have a simple structure, high energy consumption, low control accuracy, and difficult-to-control product quality. Especially for products with deeper penetration layers, it is more difficult to achieve precise control of the penetration layer and internal structure, resulting in deviations in the nitriding layer depth and microstructure, as well as a large waste of electricity and process materials, which cannot meet the product requirements of high-quality nitrided parts.

　　(2) Due to the long atmosphere establishment and cooling process time of traditional gas nitriding furnaces, under the same production plan, the number of well-type furnaces is often more than that of bell-type furnaces to meet the production capacity requirements, resulting in a significant increase in equipment investment cost and operating energy consumption cost.

　　Tianlong Company's technical personnel, combining years of design experience and China's national conditions, have innovatively designed the RFN series of controllable atmosphere bell-type nitriding furnaces with internationally advanced technology. This equipment uses an all-fiber furnace lining and the latest integrated and information-based control technology, integrating functions such as temperature, nitrogen potential, PLC, recording, alarm, expert system, dynamic control, and management system. It uses a hydrogen probe to directly measure the nitrogen potential, a mass flow meter to control the supply and measurement of feedback data of the process medium, and intelligent PID adjustment control to achieve precise control of the nitriding process. This significantly reduces the consumption of process media, to only 1/3 of that of conventional nitriding processes. The furnace temperature uniformity can be controlled within ±3℃. The actual comprehensive energy consumption is saved by more than 30%.

　　All exhaust gas from this equipment is automatically combusted and discharged. Compared with conventional nitriding furnaces, exhaust gas emissions are safer, and there is basically no ammonia smell in the workplace, fully meeting environmental emission requirements.

　　The controllable atmosphere bell-type nitriding furnace designed and manufactured by Tianlong Company won the Science and Technology Innovation Award of the China Heat Treatment Society and the Jiangsu Provincial High-tech Product in 2009.

　　3. Main Conclusions of Technical Appraisal

　　After appraisal by the China Heat Treatment Industry Association, experts unanimously agreed that the controllable atmosphere bell-type nitriding furnace produces products with stable and reliable internal quality, small heat storage, fast heating and cooling speeds, and high efficiency and energy saving. It can achieve precise control of the carburizing hardening layer and microstructure of the product, reaching the advanced technological level of similar international equipment.

　　4. Promotion Prospects and Energy-Saving Benefits

　　⑴Since its operation in 2007, the controllable atmosphere bell-type nitriding furnace has produced stable and reliable product quality, with a cumulative processing of more than 30,000 tons of various products. All technical performance indicators have met the design requirements, especially the high precision of temperature and nitrogen potential control. The equipment operates stably and reliably, fully meeting the product design requirements. The overall technical performance and manufacturing technology of this equipment are comparable to those of similar international equipment, leading domestically, and achieving good economic and social benefits.

　　⑵With the rapid development of the machinery industry in recent years, the requirements for nitriding treatment of certain products are also increasing, and higher requirements are being placed on related equipment. In recent years, China's machinery processing industry has developed well and has become an important manufacturing and assembly base for global machinery. As major companies around the world enter the Chinese market, the technical requirements for various parts are also increasing, especially for precision transmission components. The advantage of nitriding treatment is that the processing temperature of the workpiece is lower, the workpiece can obtain higher surface hardness and wear resistance, and the deformation of the workpiece is smaller. Industries such as wind power generation, shipbuilding, aerospace, steel, military industry, automobiles, petrochemicals, and mining all have products that require nitriding treatment. Traditional equipment and processes cannot achieve precise control of the nitriding process. Most nitriding products with high requirements, due to the previous inability to manufacture high-end nitriding equipment domestically, choose foreign nitriding heat treatment equipment. The price of related equipment is high, and long-term maintenance and service are difficult to guarantee, resulting in high processing and maintenance costs. Therefore, high-precision control nitriding equipment has a large market in China. The controllable atmosphere bell-type nitriding furnace is characterized by a small footprint, precise temperature and atmosphere control, a large loading capacity, energy efficiency, and low comprehensive cost. The annual demand for this type of equipment is estimated to be around 80 sets, with an output value of more than 250 million yuan, and has good development prospects.

　　⑶Compared with well-type nitriding furnaces, the initial investment cost of bell-type nitriding furnaces is approximately 17% higher. However, due to the 40% higher efficiency of the new bell-type furnace, the investment cost can be quickly recovered. More importantly, the bell-type furnace adopts multiple energy-saving measures and advanced control methods such as nitriding experts, and the automatic control configuration is comparable to advanced foreign products. The single-unit power consumption of the equipment is significantly reduced, and the consumption of process media is only 1/3 of the conventional process, significantly improving the overall efficiency. Taking a φ1.3×2.0M bell-type nitriding furnace as an example, the unit power consumption can be reduced to 0.452 kwh/kg, which meets the power consumption assessment requirements of the clean production process in the heat treatment industry that the Ministry of Industry and Information Technology is about to release and is close to the power consumption indicators of similar advanced foreign products.

　　A φ1.3×2.0M bell-type nitriding furnace processes about 1,500 tons of workpieces annually, saving 249,000 kWh of electricity per year. Based on an estimated 500 sets of bell-type nitriding furnaces in China by 2015, the total annual electricity saving can reach more than 120 million kWh.

　　(III) Controllable Atmosphere Sealed Box-Type Multi-purpose Furnace

　　1. Uses: Mainly used for carburizing, carbonitriding, bright quenching, and normalizing heat treatment of various mechanical parts such as gears, bearings, chains, and hydraulic components in the automotive, motorcycle, engineering machinery, machine tool, powder metallurgy, and petrochemical industries. There are multiple specifications, with a maximum single-batch loading capacity of 450～3500kg and a heating capacity of 270～1000kg/h, meeting the needs of different customers, products, and production volumes.

　　2. Basic Situation:

　　The controllable atmosphere sealed box-type multi-purpose furnace is one of the most advanced furnace types in the world. Through cooperation with STANGE, PE, CEC, and NITREX companies, Tianlong Company continuously introduces and absorbs the latest and most advanced international technologies to develop a second-generation controllable atmosphere heat treatment multi-purpose furnace with high cost performance that suits China's national conditions. The main features of this product are:

　　⑴Using a new type of anti-permeation fiber material as the furnace lining and eliminating the inner muffle device significantly reduces heat accumulation. This reduces the equipment's heating and cooling time and makes the equipment's energy consumption 20% lower than similar domestic and international products, and the equipment's installed power is 15% lower.

　　⑵Using a muffle-less circular furnace chamber and an improved airflow circulation system avoids airflow dead corners, improves the uniformity of furnace temperature and atmosphere, and reduces the outer shell surface area, thereby reducing heat loss.

　　⑶The oil cooling in the quenching tank uses a heat pipe-type air-cooled heat exchanger and fully sealed equipment, completely avoiding the possibility of water leaking into the oil pool, making the equipment safer than similar domestic and international products and maximizing equipment safety.

　　⑷Using eight safety measures, including safe temperature interlock, complex step interlock, furnace pressure, power failure, overheating, safe nitrogen, and safe bending pipe, ensures foolproof equipment safety.

　　⑸All key and main components of the product use imported components.

　　⑥Using computer-aided carburizing expert systems and management system software, offline simulation and online dynamic control can be achieved. When using the automatic carbon potential setting function, there is no need to set the carbon potential; the online module will automatically calculate the most suitable carbon potential based on the carbon black in the furnace and the carbides of the workpiece being carburized. When using process simulation design, the process time and carbon concentration distribution curve and numerical values can be simulated according to the given material, layer depth, temperature, and other conditions. The high degree of automation and intelligence ensures the quality of workpiece processing, shortens the process time, and saves energy consumption and process material consumption.

　　⑦The carbon potential, temperature, and action program can be controlled by computer networking, realizing fully automated and group control of all equipment on the production line. Remote control and network management can be achieved.

　　3. Energy-saving benefits

　　⑴The RM9-TLON series controllable atmosphere multi-purpose furnace is one of the leading products of Tianlong Company. Since its development in 2003, hundreds of products have served across the country. Practical applications have fully demonstrated that this type of furnace has the advantages of high efficiency, energy saving, advancement, safety and reliability, simple operation, and low operating costs, conforming to the development direction of today's precision, clean, and energy-saving heat treatment technology. The table below shows a performance comparison of Tianlong multi-purpose furnaces before and after modification.

　　⑵The comparison between new and old products shows that Tianlong's second-generation multi-purpose furnace has significantly improved performance and efficiency compared to conventional multi-purpose furnaces, especially in energy saving. The typical power consumption per furnace is reduced by 39%~42%, the power consumption of the empty furnace is reduced by more than 33%, the weight of the tray and tooling is reduced by 50kg, and the consumption of process media is saved by more than 40%. Due to the wide range of applications, high level of automation, and good processing quality of box-type multi-purpose furnaces, the market demand is increasing year by year. The current annual demand in China is estimated to exceed 500 units. Each furnace saves about 180,000 kWh per year. Based on the 3,000 box-type multi-purpose furnaces in the market in 2015, the total annual electricity saving exceeds 540 million kWh.

　　⑶Carburizing is the most energy-intensive process among the five major heat treatment processes. Saving energy consumption in carburizing is of great significance to the reduction of overall heat treatment energy consumption. The power consumption of box-type multi-purpose furnace carburizing is the most economical among all carburizing furnaces. According to statistics, the unit power consumption of carburizing and quenching in the heat treatment industry in 2008 was about 1170 kwh/t, and the new target is set at 960 kwh/t. In Tianlong Company's 2009 products, the average power consumption of carburizing and quenching for box-type multi-purpose furnaces was 558 kwh/t. This fully meets the quota indicators of the industry's clean production and has reached the advanced indicators of similar products in industrialized countries such as Europe, America, and Japan.

　　IV. A strong backing for clean production in heat treatment

　　With the market-oriented, internationalized, and professional development of the heat treatment industry, the importance of heat treatment is becoming more prominent. High-level and high-quality heat treatment processing also puts higher demands on heat treatment equipment. As a professional manufacturer of heat treatment equipment, manufacturing more and better clean heat treatment equipment with high efficiency, low energy consumption, intelligence, and no pollution is our inescapable responsibility.

　　In addition to the above leading products, Tianlong Company has also developed energy-saving clean production equipment, including: controllable atmosphere through-type multi-purpose furnaces, controllable atmosphere bottom-loading multi-purpose furnaces, controllable atmosphere box-type and well-type nitriding furnaces, controllable atmosphere push-type furnace production lines, protective atmosphere salt-quenched bainite production lines, controllable atmosphere roller furnaces, roller hearth furnaces, and mesh belt furnace production lines. These equipment still adhere to Tianlong Company's "three hundred percent" tradition (100% of products use controllable atmosphere and protective atmosphere; 100% of furnace linings use energy-saving materials; 100% of key supporting components use internationally renowned brand components), ensuring high efficiency, energy saving, and high reliability of the products. In addition, another prominent feature is its high level of automation, intelligence, and digital functions. These functions include:

　　• A fully Chinese version operating system and a user-friendly human-machine interface.

　　• Heat treatment process program compilation and process simulation design.

　　• Temperature, atmosphere, and all actions can be controlled by computer networking. Each furnace's programmable logic controller can also serve as a terminal, connecting to the computer local area network. Authorized computers within the network can observe the operation status of each furnace in real time. Networked, intelligent remote control is achieved.

　　• True color display of equipment operating status and process status, with clear and realistic images, accurate and intuitive.

　　• Equipment operation fault self-diagnosis function. Each switch, valve, instrument, and action point is connected to the computer, with equipment operation analysis, fault location and cause judgment, and fault handling prompts. Automatic cameras can also be set up in locations that are inconvenient to observe, achieving all-round monitoring.

　　• An Ethernet (100MBit) network is formed with multiple programmable controllers to perform operation and management instructions and control on multiple programmable controllers.

　　• Display of process and equipment operating status, including process programs, operating diagrams, setpoint curves and actual value curves, curve zooming, dynamic control quantities, and process data.

　　• Control and display recording of temperature, atmosphere, various permeation medium flow rates, and furnace pressure. The display and recording of current and historical faults (including fault occurrence, fault response, and fault elimination) are complete, ensuring that the equipment is completely under high-level intelligent, digital, and networked control and management, effectively controlling quality, energy consumption, and three-waste emissions.

　　A good clean heat treatment equipment can bring users excellent heat treatment quality and good economic benefits. This requires the product to have excellent control performance, extremely high reliability, energy saving and environmental protection, and more user-friendly operation functions. This is the equipment we want to provide to users. In addition, we also strive to provide users with high-quality pre-sales, in-sales, and after-sales services. To be a strong backing for clean production.

　　Our next goal is, on the one hand, to promote the application of achievements, allowing more customers to use advanced heat treatment equipment and obtain better economic benefits. On the other hand, we are still looking for gaps. We have read Mr. Fan Dongli's introduction to the "US Heat Treatment Technology Development Roadmap." The eight goals proposed by the Americans for 2020 have given us great inspiration. Compared with our American counterparts, we should consider how to continuously narrow the gap with industrialized countries. In the 30 years of reform and opening up in China, we have traveled the path of industrialized countries for hundreds of years. China's high-speed rail, automobiles, and steel have risen to the world's number one, following a path with Chinese characteristics. China's heat treatment processing and heat treatment equipment can also, according to national conditions, under the leadership of the Ministry of Industry and Information Technology, under the organization of industry associations, and with the participation of numerous enterprises and scientific research institutions, forge a path with Chinese characteristics. Only then can we transform from a heat treatment powerhouse into a heat treatment strong country and achieve the best results in energy saving and emission reduction.

　　Currently, national documents such as the "Equipment Manufacturing Industry Adjustment and Revitalization Plan," "Clean Production Implementation Plan for the Heat Treatment Industry," and "Technical Requirements for Clean Production Level Evaluation in the Heat Treatment Industry" are being gradually released and implemented. These act like a strong east wind, driving the equipment upgrades and technological advancements of China's heat treatment industry. This presents an excellent development opportunity for our equipment manufacturing enterprises. We, the Tianlong people, must firmly seize this once-in-a-lifetime opportunity, strive hard, bravely take the lead, and make the best heat treatment furnaces in China, providing the best service to heat treatment users.

　　Our after-sales service personnel often relay user problems to the R&D department, which frequently uses these problems as R&D projects for research, testing, and development. This solves problems for customers while improving products. Only continuously improved products can become the best products. Waste emission is a frequently raised concern among heat treatment users. We have strengthened our R&D in this area. Currently, ammonia gas environmental protection emission devices and automatic brine separation devices have entered the practical stage. Waste heat recycling and comprehensive utilization technology is very mature, and waste liquid decomposition and recovery are also under experimentation… Protecting the environment and reducing waste emissions are efforts Tianlong people should make for low-carbon living and protecting the Earth's ecological environment.

　　We are willing to work together with colleagues in the heat treatment industry, sharing joys and sorrows, moving forward hand in hand, jointly addressing risks and challenges, and sharing development opportunities to make our due contribution to the revitalization of China's heat treatment industry!