Manufacturing method of magnesium alloy bar

Abstract

The invention discloses a manufacturing method of a magnesium alloy bar. The manufacturing method of the magnesium alloy bar comprises the following steps that a raw blank is machined, so that the baris obtained; the bar is extruded; the bar is preheated; and the obtained magnesium alloy bar is subjected to hole pattern rolling operation, the rolling operation is conducted in sequence according to the diamond-square mode, 1-4 passes are conducted through the rolling operation, the rolling speed is 0.1m / s-0.5m / s, the bar is rotated by 90 degrees when each pass is changed in the rolling process, finally the square hole serves as the final rolling pass, the correction is conducted for one time, and therefore the final form of the bar can be guaranteed. By the adoption of the manufacturing method of the magnesium alloy bar, the anisotropy of the bar which is extruded to deform can be remarkably improved, and the toughness of the bar can be further improved.

Description

technical field

[0001] The invention relates to the field of metal materials and metal material processing, in particular to a method for improving the mechanical properties of magnesium and its alloy bars through extrusion composite multi-pass rolling. Background technique

[0002] As the lightest metal structural material, magnesium alloy has high specific strength and rigidity, good impact resistance, and can be 100% recycled. It has broad application prospects in the fields of automobile, aerospace, electronic products and so on. However, compared with other materials, the mechanical properties of most magnesium alloys are low, and how to further improve their mechanical properties has been a hot research topic at home and abroad in recent years.

[0003] Alloying is a commonly used method to improve the mechanical properties of materials. The addition of rare earth elements can significantly improve the mechanical properties of cast and deformed magnesium alloys. Howev...

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