A small amount of multi-component high-strength plastic magnesium alloy and its preparation method with a large reduction and a short process

Abstract

The invention discloses a multi-component small-amount high-strength plasticity magnesium alloy and a large-rolling-reduction short-process preparation method thereof. The multi-component small-amounthigh-strength plasticity magnesium alloy is prepared from the chemical components in percentage by mass: 0.8-1.5% of zinc, 0.8-1.5% of tin, 0.08-0.4% of calcium, 0.08-0.8% of yttrium and the balanceof magnesium and an adding element. The adding element is one or more of zirconium, gadolinium and manganese, and the adding element is prepared from the components in percentage by mass: 0.05-0.2% ofzirconium, 0.05-0.2% of gadolinium and 0.05-0.3% of manganese. The large-rolling-reduction short-process preparation method of the alloy comprises three steps of sub-rapid solidification, rolling andannealing. A high solid solution casting-rolling blank is directly obtained, the single-pass or less-pass large press quantity deformation can be realized, solid solution processing and multi-pass rolling complex process before rolling of a conventional magnesium alloy are eliminated, the preparation process of a magnesium rolled plate is greatly shortened, the tensile strength of the obtained multi-component small-amount magnesium alloy rolled plate after annealing is greater than 250 MPa, the elongation is greater than 25%, the room-temperature mechanical property is excellent, no obvious edge cracking is caused, and the yield is high.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a multi-element, small amount, high-strength plastic magnesium alloy and a short-process preparation method thereof with a large reduction. Background technique [0002] As the lightest metal material for engineering structures, magnesium alloy has the advantages of high specific strength, high electrical and thermal conductivity, high damping and shock absorption, high electrostatic shielding and good regeneration and recycling. It is widely used in aerospace, automobile and communication fields. favored. Especially in the light weight of automobiles, increasing the utilization rate of magnesium alloys will significantly reduce the weight of automobiles, save fuel and reduce CO 2 Emissions, to achieve the role of energy saving and consumption reduction. [0003] Magnesium alloy sheet is currently the most promising product in the field of deep processing. Rolling magnesium allo...

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Problems solved by technology

[0004] However, the existing magnesium alloy grades are few, the commonly used commercial magnesium alloys have high alloy content, and there are few types of alloying elements added, and the process of preparing deformed magnesium alloys is cumbersome, especially the preparation of magnesium alloy sheets is difficult and complicated.

The patent application No. 201310346840.9 discloses a method for efficiently rolling Mg-Al-Zn alloys. Although the method of rolling and forming is adopted in one pass, it needs to be kept at 550°C for a long time before rolling, which consumes a lot of energy. Not conducive to enterprises to achieve green production

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