Qinghai Guoxin research and development of high zinc rare earth aluminum alloy cast rod and magnesium alloy pipe bar

Recently, Qinghai Guoxin Aluminum Co., Ltd. successfully produced the first batch of high-zinc rare earth alloys 7055A and Φ229 cast rods, marking a breakthrough in the company's independent trial production of high-zinc rare earth aluminum alloys.

7055A is a new alloy grade developed on the basis of the original 7055 alloy and developed according to customer requirements. As a hard alloy in hard alloys, it has a higher alloy content, a higher zinc content, and a higher alloy content than a common 7-series product. With higher degree of characteristics, it is difficult to control the alloy content, casting is difficult, and the tendency of casting cracks is large. However, in front of the above three highs and three majors, the caster did not give in.

Under the leadership of the company’s R&D leadership team, the relevant members took responsibility for each other’s duties and made careful arrangements. Before the trial production, a full demonstration was conducted and a detailed trial preparation scheme was formulated. It actively analyzes and judges the technical problems that are prone to occur in production. It particularly studies and discusses the features of rare earth alloys that have never been contacted in previous production, and formulates methods for adding and using them, and keeps track of them, promptly solving various key issues in production. Technical difficulties ensured that the trial production was carried out in an orderly manner. In the end, with the full cooperation of everyone, the 7055A and Φ229 casting rods were successfully cast. After the ultrasonic flaw detection with the exception of one crack, the remaining eight were well formed.

During the R&D and production of high-zinc rare earth aluminum alloy 7055A and Φ229 cast rods, the magnesium alloy tubes and rods developed by the company have also been successfully produced. Among them, the 220mm diameter magnesium alloy rods have been successfully delivered and used for production by the China Ordnance Science Research Institute. Magnesium alloy pipes have also been successfully delivered!

In recent years, Qinghai Guoxin Aluminum Co., Ltd. based on a high starting point and high positioning, devoted itself to the trial production of high-value-added products, and the successful trial production of 7055A and Φ229 cast rods, which laid a solid foundation for the subsequent trial production of larger-sized cast rods. Also for the company to further develop high-end products, entering the high-end areas boosted confidence.