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Induction heat treatment method for reducing tension asymmetry of magnesium alloy material

A tension-compression asymmetry and induction heat treatment technology, applied in the field of magnesium alloy processing, can solve the problems of basal surface texture, difficult secondary forming processing, etc., and achieve improved formability, plastic deformation capacity, and tension-compression asymmetry. reduced effect

Active Publication Date: 2013-07-10
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the current magnesium alloy extruded and rolled deformed materials are prone to basal surface texture and difficult to carry out secondary forming processing, the purpose of the present invention is to provide a simple and effective material that can be used for conventional extrusion, rolling and other deformation processing. , Induction heat treatment process to reduce tension and compression asymmetry of magnesium alloy materials

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  • Induction heat treatment method for reducing tension asymmetry of magnesium alloy material
  • Induction heat treatment method for reducing tension asymmetry of magnesium alloy material
  • Induction heat treatment method for reducing tension asymmetry of magnesium alloy material

Examples

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Embodiment 1

[0022] Example 1: The ingot of Mg-1.8Mn alloy obtained by semi-continuous casting process is extruded into a rod of Ф16mm on a horizontal extruder after being wagoned and homogenized, and then air-cooled to room temperature after extrusion. The mechanical performance test shows that the tensile yield strength of the bar is 175 MPa, the compressive yield strength is 66 MPa, and the tension-compression ratio is 2.65. Compress the above-mentioned extruded rod by 10% along the extrusion direction, figure 1 It shows that a large number of twin structures are produced in the magnesium alloy. The Mg-1.8Mn alloy rods with twin structure were subjected to induction heat treatment, heated to 352°C, 390°C, and 433°C, respectively, and held for 5s for a short time, and then quenched in warm water at 70°C. The room temperature tensile and room temperature compressive mechanical properties of the alloy rods heated to different temperatures were tested respectively, and the results are show...

Embodiment 2

[0026] Example 2: The Mg-1.5Zn-0.6Zr alloy ingot obtained by semi-continuous casting process is extruded into a Ф16mm bar on a horizontal extruder after being wagoned and homogenized, and then air-cooled to room temperature after extrusion . The mechanical performance test shows that the tensile yield strength of the bar is 220 MPa, the compressive yield strength is 101 MPa, and the tension-compression ratio is 2.18. Compress the above-mentioned extruded rod by 5% along the extrusion direction, figure 2 It shows that a large number of twin structures are generated in the magnesium alloy matrix. The Mg-1.5Zn-0.6Zr alloy rod with twin structure was induction heated to 400°C and held for 10 min for a short time, and then quenched in warm water at 70°C or 60°C. image 3 It shows that after the induction heat treatment of rapid heating and short-time heat preservation in the present invention, the twin structure produced by pre-compression deformation and the grain size of the a...

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Abstract

The invention relates to an induction heat treatment method for reducing tension asymmetry of a magnesium alloy material, which aims at solving the problems that the existing magnesium alloy extruded and rolled deformation material is easy for having a basal texture and difficult to form secondarily. According to the deformation characteristics of twin crystal, a certain amount of compression pre-deformation is firstly applied along the main deformation direction of the extrusion and rolling, then induction heating quenching is adopted, so that the tension asymmetry of the magnesium alloy machining material can be reduced, and the plastic deformation capacity can be improved. The method is simple, feasible and effective. The induction heat treatment equipment which is widely used in the industry at present can be used, no additional investment is increased, the processing time is short, the production efficiency is high, the cost is low, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy processing, and in particular relates to an induction heat treatment process method for reducing the tension-compression asymmetry of magnesium alloy materials. [0002] Background technique [0003] Magnesium alloy has the advantages of light weight, high specific strength, shock absorption and noise reduction, and easy recycling. It has broad application prospects in 3C, aerospace, transportation and other fields. However, due to the close-packed hexagonal crystal structure of magnesium and its alloys, only the basal slip system is activated at room temperature, and the critical shear stress of basal slip is much smaller than that of other slip systems. After equal deformation processing, it often has a strong basal texture, which leads to obvious anisotropy of magnesium alloy processed materials, that is, tension and compression asymmetry. Magnesium alloy materials with such tension-c...

Claims

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Application Information

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IPC IPC(8): C22F1/06
Inventor 张静刘敏帅林飞
Owner CHONGQING UNIV