Method for preparing AZ31B magnesium alloy pressing sheet material

Abstract

The present invention discloses a method for preparing AZ31B magnesium alloy pressing-formed plate, wherein the method is realized through the following steps: 1. preparing pressing-formed plate: adapting AZ31B magnesium alloy flat section ingot for executing homogenization treatment in a box-type electric resistance furnace, keeping the processing temperature of 420-450 DEG C for 18 hours; 2. rolling the board which comprises the following procedures: preparing the flat section ingot, milling surface, grinding, heating, hot rolling, cold rolling, annealing, performance detecting and obtainingthe finished product. The rolling start temperature of hot rolling is 450-460 DEG C. The deformation of hot rolling pass is 15-20%. The temperature of final rolling is 300+ / -10 DEG C. The heating temperature is 430-450 DEG C. The heat preservation time is 1-1.5 hours until the thickness of board is 1-2mm. The deformation of cold rolling pass is about 5%. The deformation of total cold rolling is controlled below 25%. The thickness of finished board is 1.0-1.5mm. The recrystallization annealing is executed at a temperature of 260-300 DEG C. The heat preservation time is controlled to 60-90 minutes. The board prepared by the method has the advantages of good forming property under room temperature, no easy cracking in cold punching, high finished product rate. The board can be used for thin-wall products of mobile phone, television, computer casing, etc. which are manufactured by pressing-forming.

Description

technical field [0001] The invention belongs to the technical field of plate preparation, and in particular relates to a method for preparing an AZ31B magnesium alloy stamped plate. Background technique [0002] Magnesium alloy has a series of excellent properties such as light weight, specific stiffness, high specific strength, good electromagnetic shielding and easy recycling. It has received extensive attention at home and abroad, and is regarded as a green metal material in the 21st century. As a material lighter than aluminum, magnesium is far from its due use value and has great development potential. Magnesium alloy plates are currently mainly used in the aerospace and military fields. The former Soviet Union, Germany and the United States studied earlier and achieved remarkable results, mainly medium and thick plates. With the rise of 3C products such as the automobile industry, computers, instruments and meters, and adapting to the development trend of light weight...

AI Technical Summary

Problems solved by technology

Therefore, the cold rolling performance of magnesium alloy is poor and it is easy to crack

[0005] (2) Conventional magnesium alloy stamped sheets are often prone to cracking, wrinkling, and collapse during the stamping process, resulting in product scrapping

There are many factors in these stamping processes, and the situation is more complicated, which requires in-depth research.

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