China's large aircraft voyage won a new breakthrough to overcome the key technology of "heart in the heart"

China Aviation News reported that AVIC Guizhou Anji Jingzhu Co., Ltd., after nearly two years of unremitting efforts, has overcome the key components of the CJ1000 commercial large bypass ratio aircraft engine and the casting technology of the high-temperature alloy overall machine.
In the absence of various research and development techniques in China, and foreign technology and technology are tightly sealed, AVIC Anji Precision Casting relies entirely on its own production and technical capabilities to gather intelligence and tackle cooperation through “production, learning and research”. Fully mobilize and give full play to the ingenuity of cadres and staff of different positions, and go against the trend. After nearly two years of unremitting efforts, it successfully overcomes the CJ1000 commercial large bypass ratio engine high temperature alloy overall machine casting difficulties, climbed the technical peak of today's domestic high temperature alloy precision casting, and filled the domestic high temperature alloy for large passenger aircraft engines. The blank of the overall machine casting technology.
Superalloys, also known as heat-strength alloys, heat-resistant alloys or superalloys, are a new type of aerospace materials developed in the 1940s. They are mainly used in the hot end parts of aerospace engines and are important materials in the aerospace, energy and chemical industries. China started late in the research and use of high-temperature alloy materials, and has a large gap compared with similar foreign industries. From the perspective of national strategic development, it is extremely urgent to speed up the research and use of high-temperature alloy materials and shorten the gap with similar foreign industries. Similarly, the development and production of the Chinese people's own large aircraft is the dream of several generations of new Chinese aviation people. It is a symbol of the country's comprehensive strength, and several generations of aviation people have devoted their life to this. The supporting aero-engines are like the "heart" of people, and they are the core part of the aircraft. The high-temperature alloy whole machine used by the China Commercial Aircraft C919 large passenger aircraft engine developed by AVIC Guizhou Anji Precision Casting Co., Ltd. is called "The heart in the heart." How is this kind of steel made?
In September 2011, at the Beijing International Aerospace Exhibition, China’s first commercial aviation engine, the “Changjiang” CJ1000A, was exhibited. In March 2012, Feng Peide, an academician of the Chinese Academy of Engineering, said that the “Yangtze River” 1000 domestic engine is expected to be “13. It can be assembled during the five" period. Based on the above background, on March 19, 2014, Wu Guangpeng, deputy general manager of Anji Jingzhu Company, Wang Zhiyong, director of high-temperature alloy casting factory, and other representatives were invited to participate in the “Changjiang” 1000 commercial engine superalloy large-scale hosted by Liming Company. The complex thin-wall turbine rear machine 匣 precision casting program demonstration meeting, the meeting heard from the domestic high-temperature alloy precision casting industry, the technical level of the unit proposed by the different ways of the process design. In cooperation with Shanghai Jiaotong University, Anji Jingzhu proposed to adopt the main casting and cone wall integral casting process plan, which attracted the attention of experts and scholars. This process solution can completely solve the problem of casting processing, assembly and use. However, it has increased the difficulty of casting. There is no precedent in China. Although Anji Precision Casting has created many domestic firsts in titanium and aluminum precision casting technology, it has accumulated certain technical experience, but the outer dimensions are over 1.3 meters. Complex thin-walled high-temperature alloy precision castings and the use of integral casting technology in Anji precision casting is unprecedented. In the face of the concerns of Chinese commercial aircraft representatives on the overall casting molding, the stress of welding after split casting processing; looking at the ardent hope of experts and scholars, Wu Guangpeng immediately set the overall machine for quality and quantity, and by time The military order delivered by the node.
In September 2014, Anji Jingzhu cooperated with Shenyang Engine Research Institute and Liming Company to complete the design of the overall casting parts of the turbine after the machine. In October of that year, Anji Jingzhu completed the overall precision casting casting design and dawn. The company has signed the meeting and the development conditions are already in place. A large-scale complex thin-walled turbine after the high-temperature alloy has been developed. The whole casting development of the company has quietly started in Anji Jingzhu. Precision casting involves many processes. The first difficulty is the mold design and manufacturing. The company adopts the method of “jijizhi” to focus on the design and processing of the elite, using the most advanced design software, using the latest The design method, through the implementation of the grinding management method, improves the work efficiency and work quality, overcomes the technical difficulties, and finally manufactures the whole machine mold with hundreds of blocks and abnormal structure according to the requirements of the node. The development and production of castings laid a solid foundation. Mold making is one of the most important processes in precision casting, and the painter has the reputation of “dressing the wax mold”. Starting from the surface sand, the quality of the wax parts will increase with each layer. Due to the large volume of the wax, the company's existing automatic shell production line can not meet the production needs. The high-component plant coating class is led by the squad leader Zhang Guanghua. Under the manual operation, the labor intensity is beyond the imagination of ordinary people. Every time you wear a layer of "clothing", they are a three-layer test of energy and stamina and endurance; each layer of "clothes" is also operated on them. Test of skills...
In April 2015, the turbine rear machine officially entered the casting development stage. How to pour out a complete turbine rear machine squat, just like a big river in front of you, the odds are unpredictable. During this time, the company's leaders put most of their energy into the development of the turbine after the machine, the general manager of the foundry of the company, such as Yan Xing, deputy general manager Wu Guangpeng, Lu Qisheng, and other experts from Tsinghua University and Shanghai Jiaotong University. And the company's various engineering and technical personnel, the backbone of the various process staff to discuss the formulation and demonstration of various related processes. At the same time, in order to ensure the success of casting castings, the company has further accelerated the introduction of key equipment. In the whole year and four months, Anji Precision Casting has completed the development of mold making, shell making, and casting and casting. After the casting castings have been successfully completed, the castings have been finished, non-destructive testing, dimensional inspection, After the surface inspection and other processes were developed, the final identification and quality review of the castings was completed. In October 2015, the first large-scale complex thin-walled superalloy turbine with a cone wall developed by Anji was successfully formed. deliver.
Recently, a large-scale complex thin-walled superalloy turbine with a tapered wall developed by Anji Precision Casting Co., Ltd. has been machined and put into trial operation after being processed. It is a milestone for the 50-year history of Anji's casting...
During the two-year development process, AVIC Anji Precision Casting adopted a series of domestically advanced and internationally advanced technologies, and developed the largest and most complex high-temperature alloy precision casting machine castings in China for the first time. Commercial large-caliber ratio engine high-temperature alloy large-scale complex thin-wall integral machine manufacturing technology has reached the international advanced level. What is especially rare is that through the development, Anji Precision Casting has trained a group of large-scale complex thin-walled overall machine mold design and manufacturing, computer solidification simulation design and other technical talents, and trained a number of large wax mold manufacturing, ceramic shell production and melt casting. Controlling the ranks of highly skilled technicians, laid the foundation for the production of large-scale precision castings for domestic commercial engines.

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