The United States released its heat treatment roadmap in 2004, setting clear targets for the development of heat treatment technology in the United States in 2020, such as “zero distortionâ€, “zero dispersionâ€, “zero emissionsâ€, and “reducing energy consumption by 80%â€. Wait, it caused a lot of repercussions. Compared with the current situation of heat treatment in China, Western developed countries attach great importance to heat treatment, which deserves our deep thought. Aeronautical manufacturing integrates modern and advanced science and technology. As a processing method, the heat treatment process is a key processing technology that imparts mechanical properties and surface properties to aerospace products, and plays a decisive role in product quality and component performance. Aviation heat treatment technology should strive to catch up with the advanced countries and develop and progress in parallel with the world's advanced heat treatment. With the improvement of aviation heat treatment technology, it will also promote and draw heat treatment development in other industries, especially in vacuum heat treatment. For the weight reduction, safety and push-to-weight ratio of aviation products, high-temperature alloys and titanium alloy materials are increasing, and vacuum The demand for heat treatment is also increasing. At present, China's domestic vacuum heat treatment equipment has a certain level and scale, and has been widely used in aviation enterprises. Domestic vacuum gas quenching furnace, vacuum oil quenching furnace, vacuum annealing furnace, vacuum aging furnace and vacuum brazing furnace have been widely used. In the aviation heat treatment workshop, it has made great contributions to improving the quality of aviation products. Domestic vacuum water quenching furnaces and vacuum carburizing furnaces have also been used in aviation enterprises. However, there are still some gaps between domestic vacuum equipment and imported equipment. In the field of vacuum high-pressure gas quenching furnace and low-pressure vacuum carburizing furnace, aviation enterprises have been in recent years. Also introduced IPSEN company, ECM company and other companies, such as low-pressure vacuum carburizing furnace imported equipment, the gas quenching pressure after carburizing can reach 2MPa (20bar), domestically can achieve 1.5MPa, the expert system data attached to the imported equipment Complete, input material grade or main chemical composition, surface carburizing area, deep process requirements and other major process parameters, can automatically give the heat treatment process curve for the operator's reference, the domestic expert system database information is less, indicating that foreign manufacturers are In the research and development stage, investment in equipment functional structure, process flow, system coordination, simulation and production research, and testing are in place. Foreign aviation heat treatment workshops can assemble vacuum carburizing, quenching, cleaning and tempering into one production line, and use computer to automate the production process. This aspect of domestic R&D has begun. Second, domestic vacuum heat treatment application examples Domestic vacuum furnace manufacturing enterprises have developed rapidly in recent years. For example, Beijing Huahai Zhongyi Industrial Furnace Co., Ltd. raised 30 million yuan in Anhui Huzhou in 2013, and built a new vacuum heat treatment plant with an area of ​​30,000 m2 and a building area of ​​21,000 m2. The production and research area of ​​the old factory is 5,500 m2, and the total scientific research and production area is 26,500 m2. It has become the largest vacuum furnace manufacturer in China, with an annual production capacity of 300 sets/set. It has provided more than 300 vacuum furnaces for aerospace industry in China. set. Figure 1 shows Beijing Huhai Zhongyi Industrial Furnace Co., Ltd., Anhui Huzhou New Factory District. The low-pressure vacuum carburizing furnace independently developed by Beijing Electromechanical Research Institute (see Figure 2) is currently being installed and commissioned in aviation plants. It has high-temperature carburizing, nitrocarburizing and carbonitriding functions, and the gas quenching pressure can reach after carburizing. 1.5MPa. The large and medium-sized vertical vacuum quenching furnace designed by AVIC Integrated Equipment Co., Ltd. has a maximum effective area of ​​2m in diameter and 3m in height, which is the most similar equipment in Asia. The heating chamber vacuum can reach 1.33×(10-2～10-4). P a, furnace temperature uniformity ± 3 ° C, mainly used in structural steel, stainless steel, high temperature alloy parts of large and medium-sized products solid solution and aging treatment, Shen Fei, Cheng Fei, Shaanxi and other aviation companies have Adopted, the effect is good. Figure 3 shows the largest vacuum oil quenching furnace in Asia designed and manufactured by AVIC Extraordinary Equipment Factory. Third, thinking and suggestions The author believes that China's vacuum heat treatment roadmap should be an overall vacuum heat treatment development plan, from development, testing, standards, manufacturing, to use, maintenance to form a complete system, which involves metallurgy, materials, process methods, machinery manufacturing, electromechanical control , vacuum, computer and other advanced technologies in many fields. The full application of these technologies can effectively change the status quo of universities, research institutes, manufacturers and manufacturers in China's vacuum heat treatment industry. The current situation of theoretical technology and process practice is disconnected. At present, universities and research institutes focus on theoretical research, lack of engineering applications, and manufacturers. There is no strong R&D capability, most of them are manufactured according to the order, and there is no synergy between these units. Therefore, even if many heat treatment fields have achieved leapfrog development, the manufacturing technology of the overall equipment is still behind people. To change this passive situation, Form a multi-faceted synergy, clarify the industry development ideas, programs, goals and research topics, integrate all aspects of resources, focus on the development of vacuum heat treatment, build a scientific research and production base in the industry, solve weak links, improve the overall vacuum heat treatment theory, technology and Manufacturing level. Recommendation 1: As soon as possible, compile a heat treatment road map that conforms to China's national conditions, and issue it as soon as possible after review and approval by relevant departments, so that the development of heat treatment can be based on laws and regulations. Recommendation 2: The vacuum heat treatment roadmap should complete the heat treatment point, line and surface layout. Point - macro goals, research and development topics; line - specific division of labor, cooperation; face - policy support, support. Recommendation 3: While introducing equipment, it will digest and absorb its advanced technology, and actively carry out research and development, innovation and manufacture of high-precision heat treatment equipment with independent intellectual property rights. Touch Screen VICAT Softening Point Tester Touch Screen Vicat Softening Point Tester,Deformation Tester Vicat,Thermal Deformation Test Machine,Thermal Deformation Vicat Tester Dongguan Best Instrument Technology Co., Ltd , https://www.dgbestinstrument.com
I. Development status of vacuum heat treatment at home and abroad 
Figure 1 Beijing Huahai Zhongyi Industrial Furnace Co., Ltd. Anhui Huzhou New Factory District 
Figure 2 The latest low-pressure high-temperature vacuum carburizing furnace developed by Beijing Institute of Mechanical and Electrical Engineering 
Figure 3 Asia's largest vacuum oil quenching furnace designed and manufactured by AVIC Integrated Equipment Co., Ltd.