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What is the difference between the heat transfer coefficient and the thermal conductivity?

The heat transfer coefficient was formerly known as the overall heat transfer coefficient. Current national standards have unified the name to heat transfer coefficient. The heat transfer coefficient K value refers to the amount of heat transferred per 1 square meter in 1 hour under stable heat transfer conditions, with a temperature difference of 1 degree (K, ℃) between the air on both sides of the enclosure structure. The unit is watts per square meter-degree (W/㎡·K, where K can be replaced by ℃). The thermal conductivity refers to the amount of heat transferred per 1 square meter in 1 hour under stable heat transfer conditions, with a temperature difference of 1 degree (K, ℃) between the surfaces of a 1m thick material. The unit is watts per meter-degree (W/m•K, where K can be replaced by ℃).

2016

China's unique high-temperature heat treatment and rolling bamboo strips complete production technology

“It is better to eat without meat than to live without bamboo.” Although Chinese people have a certain cultural attachment to bamboo, and bamboo products are common in our lives, most people remain skeptical about the durability of bamboo materials, let alone using them outdoors. Professor Li Yanjun of Nanjing Forestry University recently won the second prize of the National Science and Technology Progress Award for his project “Key Technologies and Applications of High-Performance Bamboo-Based Fiber Composite Materials”, which has broken through many difficulties in the application of outdoor bamboo reconstituted materials and opened up a new field in bamboo processing and utilization. In Professor Li Yanjun’s office, the reporter saw his proud works—a series of outdoor bamboo reconstituted material products, such as outdoor reconstituted

2016

What to do about distortion in vacuum quenching during heat treatment

In recent years, with the increasing maturity of automotive parts heat treatment technology, the geometric accuracy of workpieces after heat treatment is required to be higher and higher. Quenching deformation will inevitably cause a decrease in the geometric accuracy of the workpiece. Workpieces need to be heated to 850~950℃ for quenching, and high temperatures often have adverse effects, such as distortion. Mold-type vacuum quenching, also known as pressure quenching, is an effective means of reducing quenching deformation and is widely used in the automotive industry. Vacuum quenching distortion is the most common problem in the heat treatment process. For mass-produced bearings and gears, controlling quenching distortion is an effective means of improving product quality and service life.

2016

The 16th China International Heat Treatment and Industrial Furnace Exhibition achieved remarkable results in attracting exhibitors.

The 16th China International Heat Treatment and Industrial Furnace Exhibition, hosted by the China Association of Automobile Manufacturers, the China Nonferrous Metals Industry Association, the Chongqing Municipal Commission of Economy and Information Technology, and the Industrial Furnace Branch of the China Nonferrous Metals Industry Association, will be held at the Chongqing International Expo Center from March 31 to April 2. The China International Heat Treatment and Industrial Furnace Exhibition is the most influential and well-known professional brand exhibition in the heat treatment industry in Western China. Since the registration for this exhibition began last September, it has received great attention and active participation from many domestic and foreign companies in the industry. According to the organizing committee's statistics, by the end of December 2015, the exhibition had attracted Huisen Yifa, Xi...

2016

Introduction to the promotion of advanced energy-saving and emission-reduction equipment

Introduction to Advanced Technologies and Equipment for Energy-Saving, Emission Reduction, and Clean Production in Heat Treatment - Tianlong Technology Furnace Industry (Wuxi) Co., Ltd. Abstract: I. Large-scale technological transformation has driven the technological progress of heat treatment equipment II. Tianlong Company is committed to the manufacturing of "sharp tools" III. Introduction of Tianlong Company's main precision, energy-saving, and environmentally friendly products (1) Large energy-saving controllable atmosphere pit-type carburizing furnace (2) Large energy-saving controllable atmosphere bell-type nitriding furnace (3) Controllable atmosphere sealed box-type multi-purpose furnace IV. A strong backing for clean production in heat treatment I. Large-scale technological transformation has driven the technological progress of heat treatment equipment A Chinese proverb says

2011

China Equipment Network's report on Tianlong Company

Application of heat treatment equipment in the heat treatment of wind turbine gearbox gears. Currently, the wind turbine gearboxes used in China are mainly from foreign companies such as GE, Vestas, Bosch Rexroth, and others, as well as gearboxes from domestic companies such as Nantong High-Speed Gear, Chongqing Gear, Daqi Dazhong, Hangzhou Gear, and Erzhong. The materials for the external gears of the gearboxes include 17CrNiMo6, 15CrNi6, 20CrNi2MoA, 17Cr2Ni2MoA, etc., and the final heat treatment method usually used is carburizing and quenching; the materials for the internal gears are 42CrMoA, 34Cr2Ni2MoA, etc., and usually nitriding or high-frequency processes are used.

2011

Wuxi Chamber of Commerce website published Tianlong Company

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 technologies are "sharp tools" used to improve the intrinsic performance of mechanical products, and are an indispensable and important 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 was less than 10%, and most heat treatment enterprises' heat treatment equipment was...

2011

We are hiring professionals in heat treatment.

Tianlong Technology Furnace Industry (Wuxi) Co., Ltd., established in 2002, is a national standard and industry standard setter, a participant in the National Torch Plan, and has received the honor of "National High-tech Enterprise." Tianlong Company has formed a rigorous, scientific, and comprehensive management system. Currently, due to company development needs, we need to recruit heat treatment professionals.

2010

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