Technique for processing high-strength high-tractility magnesium alloy member

Abstract

The invention discloses a technology of processing a magnesium alloy with high intensity and flexibility, which subsequently includes vacuum melting, continuous casting, extrusion, forging and such procedures. The invention reasonably matches the solution body composition and the metamorphism liquid during casting process, and the grains are refined through the chilling action of a crystallizer at first; the magnesium alloy liquid is transmitted by an electromagnetic pump so as to prevent secondary oxidation and ensure safety in casting of the magnesium alloy; and then further refining the grains through electromagnetic mixing power, large ratio extrusion and heat treatment secondary crystallization, which effectively ensures tiny enough isometric crystals can be obtained from the alloy microstructure. The magnesium alloy elements of the automotive steering control arms, support elements of motorcycles and bicycles, can be obtained for the first time by the improvement, which are fully filled, good in surface quality, fine and even in grain size, reasonable in streamline distribution and without disordered streamline, vortexing and draining phenomena. The invention combines a plurality of technological processes into a production cycle, which reduces the turnover links, saves energy and reduces cost.

Description

【Technical field】 [0001] The invention relates to a processing technology of magnesium alloy parts, in particular to a processing technology of high-strength and high-ductility magnesium alloy parts. 【Background technique】 [0002] Magnesium alloy is the most environmentally friendly material in the 21st century, and it is also the lightest structural material at present. There are abundant mineral resources in my country. At present, the forming method of magnesium alloy products is mainly casting, especially die-casting, whose product performance, reliability, yield, material utilization rate and equipment capacity are all limited, and cannot meet the high-level requirements in aviation, military and other fields. Requirements for performance structural parts. [0003] If wrought magnesium alloys can be realized, then wrought magnesium alloys will have higher strength, better ductility and more diverse mechanical properties. The forging forming method can obtain high-per...

AI Technical Summary

Problems solved by technology

In 2003, K.U.Kainer reported that a variety of magnesium alloy forgings for helicopters and racing engines that can withstand extremely high static and dynamic alternating loads were prepared by using a three-axis forging process, and these forgings can serve in high-temperature environments in aviation, automotive and other industrial fields , however, these foreign technologies are all secret technologies

Although China's magnesium industry has been greatly developed, the resource advantages of magnesium cannot be transformed into high value-added products.

There are many magnesium processing enterprises in China, but there is still a big gap compared with foreign advanced enterprises in terms of process technology and product quality. To make up for this gap requires the joint efforts of scientific research institutes and magnesium alloy enterprises.

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