5A90 aluminum-lithium alloy superplastic plate, Zhengzhou Qingyan alloy realizes industrialized mass production

Time：2020-10-21

Zhengzhou Qingyan Alloy Technology Co., Ltd. has developed a lightweight and high-strength 5A90 aluminum-lithium alloy large-size superplastic sheet for aerospace. The sheet width is 1.2m, the length is 4m, and the thickness is 0.8-3mm. Compared with the ordinary T3 state aluminum-lithium alloy sheet, the superplastic sheet has the advantages of small grain size, high strength and good high temperature plasticity. Realize the manufacture of superplastic and other materials.

At present, the urgency of weight reduction for aviation and aerospace vehicles has entered the era of "grams and grammes". As a lightweight, high-strength metal structural material, aluminum-lithium alloy has a very broad application in the field of aviation and aerospace. Application prospects, for every 1% lithium added to the alloy, the density decreases by 3%, and the elastic modulus increases by 6%. Using aluminum-lithium alloys instead of conventional high-strength aluminum alloys can reduce the structural weight by 5%-15% and increase the stiffness by 15%-20%. The use of ultra-rapid forming (molding) technology to prepare aluminum-lithium alloy thin-wall integral components can further reduce weight, reduce the number of parts, reduce costs, and improve the overall rigidity and reliability of components, bringing huge social and economic benefits to the aerospace manufacturing industry. benefit. The United States, the United Kingdom and other European countries, the former Soviet Union, Russia, Japan and other countries have included this technology in the national high-tech development plan. As an important means to develop the aerospace industry, superplastic aluminum-lithium alloy components have been successfully used in various aerospace. equipment and various military and civilian aircraft. The main application parts are fuselage frame, flap rib, electronic equipment cover, aircraft front rudder, vertical stabilizer, fairing, air intake lip, engine access door, aircraft maintenance door and some panel parts.

Because lithium is very active, aluminum-lithium alloys are easily oxidized to form slag and absorb hydrogen under atmospheric conditions, which seriously affects the performance and quality of the alloy. At present, the world's high-quality aluminum-lithium alloys are produced under vacuum or vacuum negative pressure conditions, mainly in the following three ways: ① vacuum melting and casting method; ② gas protection melting + negative pressure hydrogen extraction and standing + semi-continuous casting method ; ③ Gas shielded smelting + spray deposition casting method. Relying on the national R&D platform, Zhengzhou Qingyan Alloy Technology Co., Ltd. established an aluminum-lithium alloy R&D department to optimize the vacuum melting and casting process to prepare superplastic aluminum-lithium alloy plates. Solved the problems of easy hydrogen absorption, oxidation slag, composition segregation and shrinkage porosity of aluminum-lithium alloy, and can provide 1420, 2195 and other grades of aluminum-lithium alloy sheet and strip foil, tube rod wire, forgings and other products in batches, and according to customers Drawings provide parts. At the same time, for aluminum-lithium alloy pre-research models, the company has the ability to develop the whole process from design drawings to parts delivery (casting, machining, heat treatment, machining, surface treatment, and testing).

Zhengzhou Qingyan Alloy Technology Co., Ltd. adheres to the concept of "technology leads the future, develops lighter, stronger and more cost-effective high-performance non-ferrous alloys, and continuously creates value for customers". The development of new materials, new technologies, and new products is our own responsibility, and we focus on the research, development, and production of high-quality, lightweight, and high-strength alloy materials such as aluminum-lithium, magnesium-lithium, and magnesium-rare earth, so as to reduce the weight of manufacturing in China and help the vigorous development of China's aerospace industry.

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