On July 5, the 2 series high-strength and high-toughness aluminum alloy round casting rod with the largest domestic specification of φ1400mm was installed in Xinjiang Zhonghe Joint Stock Company (hereinafter referred to as "Xinjiang Zhonghe") New Material Industrial Park in the Ganquanpu Economic and Technological Development Zone, Urumqi, Xinjiang A trial production was successful. The performance of this product has an overall low-magnification grain size of level 2, leading the industry. This product will be an important application blank for the ring forging parts of the new model launch vehicle in the future.

The aerospace industry is a national strategic high-tech industry. In the 1990s, Xinjiang Zhonghe integrated into the aerospace industry supply chain system with a high sense of historical mission and social responsibility, providing long-term supply of refined aluminum and alloy series products, ensuring aerospace raw materials Lightweight applications. With the implementation of my country's major aerospace science and technology project strategy, the development of large aluminum alloy ring forged parts as the core component of the carrier rocket tank has become particularly urgent.

At the end of 2018, relying on the advanced aluminum alloy melting and casting technology of China Research Institute of Technology Group Youyan Metal Composite Technology Co., Ltd., as well as the advantages of Xinjiang Zhonghe high-purity aluminum industry, jointly developed the 2 series and 7 series used in the field of major equipment manufacturing in the country. Large-size high-strength and high-toughness aluminum alloy cast rod products. Up to now, Xinjiang Zhonghe has been able to stably produce 2219, 7050 and other alloy grades of cast rod products with different specifications from φ90mm to φ880mm. The overall low-magnification grain size has all reached Grade 1 or above. Some related products have been replaced by imports. It has made outstanding contributions to the independent and controllable aspects of the chain and supply chain.

It is reported that the successful trial production of the domestic largest specification φ1400mm high-strength and high-toughness aluminum alloy round cast rod has the characteristics of high specific strength, good low and high temperature mechanical properties, high fracture toughness, and good stress corrosion resistance. It is suitable for high temperature 315℃. Working structural parts, high-strength welding parts. This marks the gradual deployment of Xinjiang Zhonghe in the field of advanced structural materials, and the production process of high-alloyed products has reached the domestic leading level, laying a solid technical foundation for expanding the space for the development of aerospace industry and improving the overall level of aerospace science and technology applications.

Chen Changke, deputy general manager of Xinjiang Zhonghe, told the author that the company’s cooperation with China Research and Technology Group’s "Aviation Super Large Aluminum Alloy Billet Development" project represents the domestic large-size aluminum alloy rod casting, forging, heat treatment and other processes. The highest level. The 2219 aluminum alloy of φ1400mm specification developed by this project is used as the guarantee aluminum for major national technical equipment. The company has precisely controlled every detail index during the preparation period, such as plan formulation, tooling design, and process execution, and formulated a detailed and complete trial production. The plan is to ensure the stability of the production line and product quality, and provide reliable material support for the national aerospace industry. In the future, the company will also focus on the direction of major national scientific research plans, take market demand as the driving force, continue to increase scientific and technological innovation, center on the industrial chain advantages of high-purity aluminum preparation technology, realize import substitution at more application levels, and realize the realization of the domestic cycle. Autonomous and controllable. Closely integrate advanced production capacity with cloud computing, big data, and industrial Internet to realize new business formats and create new kinetic energy to make positive contributions to the realization of the overall goal of economic development in Xinjiang and high-quality transformation. "