挤压铸造LPSO相增强Mg97Zn1Y2合金的组织及性能

杨雄; 郝良彦; 吕书林; 方晓刚; 吴树森

doi:10.15980/j.tzzz.2018.01.003

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挤压铸造LPSO相增强Mg₉₇Zn₁Y₂合金的组织及性能
Microstructure and Mechanical Properties of Mg₉₇Zn₁Y₂ Alloy Reinforced with LPSO Structure Produced by Rheo-Squeeze Casting
2018年38卷第1期页码：9-13
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.01.003

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[1]杨雄,郝良彦,吕书林,方晓刚,吴树森.挤压铸造LPSO相增强Mg_(97)Zn_1Y_2合金的组织及性能[J].特种铸造及有色合金,2018,38(01):9-13.

Yang Xiong, Hao Liangyan, LüShulin, et al. Microstructure and Mechanical Properties of Mg₉₇Zn₁Y₂ Alloy Reinforced with LPSO Structure Produced by Rheo-Squeeze Casting[J]. Special Casting & Nonferrous Alloys, 2018,38(1):9-13.
[1]杨雄,郝良彦,吕书林,方晓刚,吴树森.挤压铸造LPSO相增强Mg_(97)Zn_1Y_2合金的组织及性能[J].特种铸造及有色合金,2018,38(01):9-13. DOI： 10.15980/j.tzzz.2018.01.003.

Yang Xiong, Hao Liangyan, LüShulin, et al. Microstructure and Mechanical Properties of Mg₉₇Zn₁Y₂ Alloy Reinforced with LPSO Structure Produced by Rheo-Squeeze Casting[J]. Special Casting & Nonferrous Alloys, 2018,38(1):9-13. DOI： 10.15980/j.tzzz.2018.01.003.

摘要

以Mg

合金为对象

利用超声振动处理制备半固态浆料

研究了半固态流变挤压成形工艺中挤压压力对合金组织及性能的影响。经过超声处理制备的半固态浆料直接浇注得到的合金中α-Mg晶粒尺寸减小

LPSO相也得到细化并均匀分布于基体中。经过挤压成形的合金

LPSO相得到进一步细化

在块状LPSO相上出现条状相

并且随着压力增大

条状相数量增多。合金抗拉强度和伸长率随着压力增大先升高后基本保持不变。最优挤压压力为100 MPa

此时合金的抗拉强度和伸长率分别为234 MPa和11.6%。

Abstract

The semi-solid slurry of Mg

alloy was prepared by ultrasonic vibration

and effects of rheo-squeeze pressure on microstructure and properties of Mg

alloy were investigated.The size ofα-Mg grains in the alloy obtained by ultrasonic treatment is decreased

and the LPSO structure can be refined and uniformly distributed in the matrix after ultrasonic treatment.After rheo-squeeze casting

the LPSO structure is further refined with appearance of strip phase on the block LPSO structure.With the increase of pressure

the number of strip phase is increased.The tensile strength and elongation of alloy are increased at first and then keep constant with the increase of pressure.The tensile strength and elongation of the alloy reach 234 MPa and 11.6%

respectively

with the pressure of 100 MPa.