Method and device for forming magnesium alloy formed parts with excellent high-temperature mechanical property

Abstract

The invention discloses a method and a device for forming magnesium alloy formed parts with excellent high-temperature mechanical property. The device mainly comprises a die, a laser, a thermal sensor, a miniature heater and the like. The method includes: heating magnesium alloy to 120-150 DEG C to realize high-speed contact molding according to the laser peening quick-forming technology which utilizes dynamic strain ageing reinforcement, heat forming and high-pressure strain rate of thermal laser peening, placing magnesium alloy plates on a die in a work cavity, attaching energy converters on the magnesium alloy plates, vacuumizing the work cavity, and realizing high-speed contact molding of the magnesium alloy plates by the thermal laser peening process through the miniature heater and the laser. Dislocation anchoring effect and nano precipitates are formed in formed parts by the thermal laser peening technology, so that the magnesium alloy formed parts have excellent high-temperature mechanical property such as high-temperature creep resistance, high-temperature strength and the like, thermal high-strain-rate forming of the magnesium alloy plates is realized, and forming performance and efficiency of the magnesium alloy are improved.

Description

technical field [0001] The invention relates to the field of magnesium alloy forming and the field of laser processing, in particular to a forming device and method for obtaining magnesium alloy plate forming parts with superior high-temperature mechanical properties. It is mainly used to improve the formability and high-temperature mechanical properties of magnesium alloys, and provides a new and effective technology for plastic forming of magnesium alloy sheets. Background technique [0002] As a green engineering material in the 21st century, magnesium alloy has broad development prospects. Due to the special structure of magnesium alloys, magnesium alloys have a close-packed hexagonal crystal structure, and only three slip coefficients of the basal plane {0001} can be deformed at room temperature, so the plastic processing performance at room temperature is very poor, which is the plasticity of magnesium alloys. The important reason for the lack of processing and form...

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Problems solved by technology

[0012] The purpose of the present invention is to provide a magnesium alloy plate that can realize rapid forming with high temperature and high strain rate, and at the same time obtain superior high temperature and high strength after forming The plastic forming device and method of magnesium alloy formed parts with high temperature mechanical properties such as high temperature creep resistance and so on, overcome the inability to improve the high temperature mechanical properties of magnesium alloy formed parts such as high temperature high strength and high temperature creep resistance in the current hot plastic forming method of magnesium alloy In order to ensure the surface quality and low forming rate of magnesium alloy forming parts, a warm-heating high-strain-rate forming device and a high-temperature high-strain rate forming device are provided to improve the high-temperature mechanical properties and high-temperature creep resistance of magnesium alloy forming parts by using warm laser shot peening technology. method

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