Mg-Sn-Al wrought magnesium alloy and preparation method thereof

Abstract

The invention belongs to the field of magnesium alloy design. An Mg-Sn-Al ternary alloy belongs to a novel wrought magnesium alloy and consists of the following raw materials in percentage by mass: 4.00-10.00% of industrial pure tin, 1.00-6.00% of industrial pure aluminum, and the balance of industrial pure magnesium and unavoidable impurities. A preparation method of the wrought magnesium alloy comprises the steps of firstly melting magnesium and aluminum, then adding tin and a microalloying element, namely manganese or zinc, pouring to form cast ingots after stirring and refining, carrying out homogenizing treatment on the cast ingots, and extruding the cast ingots to obtain corresponding extruded sections. The wrought magnesium alloy and the preparation method are characterized in that the novel wrought magnesium alloy with relatively good strength and toughness is prepared from the raw materials, namely the aluminum and the tin, which are both relatively low in cost and melting point, and the strength and the toughness are equivalent to a commercial high-strength magnesium alloy ZK60.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a rare earth-free deformed magnesium alloy with both strength and toughness and a preparation method thereof. Background technique [0002] Due to the exhaustion of energy sources, people's pursuit of lightweight has made magnesium alloys a research hotspot. There are not many effective alloying elements for magnesium alloys. There are only a few good ones such as: Al, Zn, RE (rare earth elements) Among them, magnesium alloys containing Al develop into AZ series magnesium alloys, but they can only be used at room temperature; magnesium alloys containing Zn and the addition of trace alloying element Zr develop into ZK series magnesium alloys, which are mainly used in superalloys. However, due to the burning loss of Zr, its cost is high, which restricts its development; and the magnesium alloy containing RE develops into a rare earth magnesium alloy, and a system with excellent perfo...

AI Technical Summary

Problems solved by technology

[0002] Due to the exhaustion of energy sources, people's pursuit of lightweight has made magnesium alloys a research hotspot. There are not many effective alloying elements for magnesium alloys. There are only a few good ones such as: Al, Zn, RE (rare earth elements) Among them, magnesium alloys containing Al develop into AZ series magnesium alloys, but they can only be used at room temperature; magnesium alloys containing Zn and the addition of trace alloying element Zr develop into ZK series magnesium alloys, which are mainly used in superalloys. However, due to the burning loss of Zr, its cost is high, which restricts its development; and the magnesium alloy containing RE develops into a rare earth magnesium alloy, and a system with excellent performance (Mg-RE-Zn) is formed after adding Zn element at the same time. Because the price of RE is relatively expensive, it is not easy to be widely used in civilian fields

However, as rare earth resources become less and less, their prices become more and more expensive. Therefore, there is an urgent need to develop high-performance magnesium alloys that do not contain rare earths, hoping to be used at higher temperatures, so now Many researchers at home and abroad are committed to the research and development of magnesium alloys with new systems (excluding rare earths)