Xinjiang Zhonghe successfully developed large specification high strength and high toughness aluminum alloy round casting rod

On July 5th, a 2-series high-strength and high-toughness aluminum alloy round casting bar with a large diameter of 1400 mm was successfully trial-produced in Xinjiang Zhonghe New material Industrial Park, which is located in Ganquanbao Economic and technological Development Zone, Urumqi, Xinjiang. The overall low-power grain size of the product is up to level 2, industry. This product will be an important application blank for the ring forging parts of the new type launch vehicle in the future.

The aerospace industry is a national strategic high-tech industry. In the 1990s, Zhonghe in Xinjiang integrated into the supply chain system of the aerospace industry with a high sense of historical mission and social responsibility, and supplied refined aluminum and alloy products for a long time, ensuring the lightweight application of aerospace raw materials. With the implementation of the strategy of major aerospace science and technology engineering in China, the development of large aluminum alloy ring forging parts, as the core component of launch vehicle tank, becomes particularly urgent.

At the end of 2018, relying on the aluminum alloy melting and casting technology of China Youyan Metal cladding Technology Co., Ltd., as well as the advantages of Zhonghe high purity aluminum industry in Xinjiang, we have jointly developed 2-series and 7-series high-strength and high-toughness aluminum alloy casting bars which are used in the field of national major equipment manufacturing. Up to now, Zhonghe in Xinjiang can steadily produce different specifications of 90mm diameter-880mm diameter, 2219, 7050 and other alloy grades of cast bar products, the overall low grain size has all reached more than level 1, and some related products have been imported instead. It has made contributions to the independent control of the industrial chain and supply chain.

It is reported that the domestic large diameter 1400 mm high strength and high toughness aluminum alloy round casting bar has the characteristics of high specific strength, good mechanical properties at low temperature and high temperature, high fracture toughness and good stress corrosion resistance. It is suitable for structural parts and high strength weldments working at high temperature. This marks the gradual development of the layout of Xinjiang Zhonghe in the field of structural materials, and the production technology of high alloy products has reached the domestic level, which has laid a solid technical foundation for expanding the space for the development of the aerospace industry and improving the application of aerospace science and technology as a whole.

Chen Changke, deputy general manager of Xinjiang Zhonghe, said, "the 'development of super-large aluminum alloy billets for aviation' in cooperation with China Youyan Science and Technology Group represents the high level of casting, forging and heat treatment of large aluminum alloy bars in China. The 1400 mm diameter specification 2219 aluminum alloy developed by this project is used as the guarantee aluminum for national major technical equipment, and we control every detailed index such as scheme formulation, tooling design, process execution and so on during the preparation period. a detailed and complete trial production plan has been developed. We will ensure the stability of the production line and product quality, and provide reliable material support for national aerospace. "

In the future, Zhonghe in Xinjiang will focus on the direction of national major scientific research planning, take the market demand as the traction, continue to increase the intensity of scientific and technological innovation, and realize import substitution at more application levels around the advantages of the industrial chain of high purity aluminum preparation technology. around the domestic cycle to achieve independent control. Closely combine production capacity with cloud computing, big data and industrial Internet to achieve new forms of industry, create new momentum, and make positive contributions to the overall goal and economic transformation of Xinjiang.