Novel high strength rare earth magnesium alloy and processing technology thereof

Abstract

The invention provides novel high strength rare earth magnesium alloy. The novel high strength rare earth magnesium alloy comprises the following components in percentage by weight: 0.4-0.5% of zinc, 2-3% of yttrium, 0.5-2.8% of titanium, 0.03-0.05% of zirconium and the balance of magnesium. A processing technology of the novel high strength rare earth magnesium alloy comprises the following steps: (1) preparing magnesium yttrium alloy, magnesium titanium alloy and magnesium zirconium alloy; (2) adding the prepared magnesium yttrium alloy, magnesium titanium alloy and magnesium zirconium alloy into a crucible according to a formula, heating to 800 DEG C in the presence of a shielding gas, continuously stirring for 30 minutes, warming to 900 DEG C, preserving heat for 20-50 minutes, and then standing and cooling to room temperature; and (3) carrying out heat treatment on the cooled alloy in the presence of the shielding gas at the temperature of 600 DEG C for 30 hours, and then carrying out oil quenching treatment. The novel high strength rare earth magnesium alloy has the beneficial effects that high temperature mechanical property and corrosion resistance of magnesium alloy are improved by adopting methods for increasing a rare earth element yttrium and adding a rare earth element titanium; besides, a zirconium element is added, so that hardness and abrasion resistance of the magnesium alloy are also enhanced.

Description

technical field [0001] The invention relates to a rare earth material, in particular to a processing technology of a high-strength rare earth magnesium alloy. Background technique [0002] my country's patent application number CN201110307416.4 discloses a technical scheme of a rare earth magnesium alloy and its processing technology. 2% copper, 0.2-0.4% manganese, 1-2% yttrium, and the rest are magnesium and impurities. After the smelting process is completed, the high-temperature mechanical properties and corrosion resistance of the magnesium alloy are improved. However, in this technical solution, the addition amount of yttrium element is too small, the types of rare earth elements are few, the process only involves casting, lack of subsequent heat treatment, and the strength and corrosion resistance of the alloy have not been fully improved. Contents of the invention [0003] Aiming at the deficiencies of the existing technology, the invention provides a novel high-str...

AI Technical Summary

Problems solved by technology

However, in this technical solution, the addition amount of yttrium element is too small, and the types of rare earth elements are few. The process only involves casting, lack of subsequent heat treatment, and the strength and corrosion resistance of the alloy have not been fully improved.