变质处理对MB2镁合金挤压变形前后组织与性能的影响

赵洋; 李光玉; 胡尚伟

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变质处理对MB2镁合金挤压变形前后组织与性能的影响
Effects of Modification on the Microstructure and Properties of MB2 Magnesium Alloy Before and After Deformation
2008年第6期页码：439-441
纸质出版日期： 2008 ，
DOI：

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[1]赵洋,李光玉,胡尚伟.变质处理对MB2镁合金挤压变形前后组织与性能的影响[J].特种铸造及有色合金,2008(06):439-441+407.

Zhao Yang, Li Guangyu, Hu Shangwei. Effects of Modification on the Microstructure and Properties of MB2 Magnesium Alloy Before and After Deformation[J]. Special Casting & Nonferrous Alloys, 2008,(6):439-441.
[1]赵洋,李光玉,胡尚伟.变质处理对MB2镁合金挤压变形前后组织与性能的影响[J].特种铸造及有色合金,2008(06):439-441+407. DOI：

Zhao Yang, Li Guangyu, Hu Shangwei. Effects of Modification on the Microstructure and Properties of MB2 Magnesium Alloy Before and After Deformation[J]. Special Casting & Nonferrous Alloys, 2008,(6):439-441. DOI：

摘要

通过加入稀土及其他合金元素对MB2镁合金铸锭进行复合变质处理

随后在330℃下进行挤压成形

得到强度高、塑性变形性能优良的镁合金型材

并采用金相显微镜、图像分析系统及MTS-810材料测试系统等分析了变质元素对镁合金组织性能的影响。结果表明

变质处理可以使β-Mg17Al12相由原来的连续网状分布变为分散的粒状分布

并使铸态MB2镁合金的晶粒由原来的100～200μm细化到约15～35μm;挤压变形后变质的MB2镁合金晶粒进一步细化到5～10μm左右

合金的抗拉强度和伸长率分别由原来的247MPa和13%提高到312MPa和22%。

Abstract

The MB2 magnesium alloy profile bar with high strength and plasticity which was modified by Re and some special elements was prepared by extruded forming at 330 ℃.Effects of modification elements on microstructure and properties of the Mg alloy profile bar before and after deformation was observed by optical microscope（OM）

image analysis system and MTS-810 materials testing system.The results reveal that the morphology of β-Mg17Al12 phase is converted from the continuous net-like structure into dispersive particles and the grain size is decreased from 100

00 μm to 15

5 μm in the modified magnesium alloy.The grain size of the modified MB2 magnesium alloy after deformation is further refined to 5

0 μm

and tensile strength and elongation are remarkably increased from 247 MPa and 13% to 312 MPa and 22%

respectively.