Preparation of A356.2 Alloy Semi-solid Billets by Composite Technology

Zhu Guangyu; Xue Kemin; Li Ping; Xue Chuanmei; Jiang Huahai; Jiang Zheng

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Preparation of A356.2 Alloy Semi-solid Billets by Composite Technology
- role： First author 第一作者
- Affiliation：
  School of Materials Science and Engineering,Hefei University of Technology,Hefei,China
Zhu Guangyu
1 ,
- Affiliation：
  School of Materials Science and Engineering,Hefei University of Technology,Hefei,China
Xue Kemin
1 ,
- Affiliation：
  School of Materials Science and Engineering,Hefei University of Technology,Hefei,China
Li Ping
1 ,
- Affiliation：
  School of Materials Science and Engineering,Hefei University of Technology,Hefei,China
Xue Chuanmei
1 ,
- Affiliation：
  School of Materials Science and Engineering,Hefei University of Technology,Hefei,China
Jiang Huahai
1 ,
- Affiliation：
  School of Materials Science and Engineering,Hefei University of Technology,Hefei,China
Jiang Zheng
1
Vol. 30, Issue 9, Pages: 819-823(2010)
Published： 2010 ，
DOI：

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[1]朱广余,薛克敏,李萍,薛传妹,姜华海,江政.A356.2合金半固态坯料的复合制备工艺[J].特种铸造及有色合金,2010,30(09):819-823+779.

Zhu Guangyu, Xue Kemin, Li Ping, et al. Preparation of A356.2 Alloy Semi-solid Billets by Composite Technology. [J]. Special Casting & Nonferrous Alloys 30(9):819-823(2010)
[1]朱广余,薛克敏,李萍,薛传妹,姜华海,江政.A356.2合金半固态坯料的复合制备工艺[J].特种铸造及有色合金,2010,30(09):819-823+779. DOI：

Zhu Guangyu, Xue Kemin, Li Ping, et al. Preparation of A356.2 Alloy Semi-solid Billets by Composite Technology. [J]. Special Casting & Nonferrous Alloys 30(9):819-823(2010) DOI：

Preparation of A356.2 Alloy Semi-solid Billets by Composite Technology

Zhu Guangyu ; Xue Kemin ; Li Ping ; Xue Chuanmei ; Jiang Huahai ; Jiang Zheng ;

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Abstract

A356.2 alloy semi-solid billets were prepared by near liquidus pouring combining with equal channel angular extrusion and semi-solid isothermal treatment. Equivalent spherical diameter and shape factor of the semi-solid billets were measured by metallographic microscope and metallographic analysis system. The results reveal that A356.2 alloy semi-solid billets with desirable properties in which average grain size is in range of 60⁹0 μm and shape factor is in range of 0.7⁰.9 can be successfully prepared by the composite technology. Semi-solid billets with fine rosette and lumpy grain can be obtained by near liquidus pouring,and grain accumulate severe energy of deformation through severely distortion and breaking during ECAE process,which results in the gradual transformation of grain into near-spherical and spherical structure with the increase of grain size.

transl

Keywords

Near-liquidus Pouring; ECAE; Semi-solid Isothermal Treatment; Semi-solid Billets

transl

摘要

通过近液相线浇注、等径角挤压和半固态保温处理复合工艺制备了A356.2合金半固态坯料。利用金相显微镜和金相分析系统测量各工艺参数下制得半固态坯料的等积圆直径和形状系数

并对测量结果进行分析。结果表明

该复合工艺可以制备性能优良的A356.2合金半固态坯料

平均晶粒尺寸在57.4～87.2μm之间

形状系数在0.74～0.91之间;近液相线浇注可以获得呈蔷薇状和团状的晶粒细小坯料

等径角挤压使晶粒发生了明显的变形和破碎

累积了大的变形能

保温处理过程中晶粒逐步向近球状和球状转变

同时晶粒尺寸增大。

Abstract

0 μm and shape factor is in range of 0.7

.9 can be successfully prepared by the composite technology. Semi-solid billets with fine rosette and lumpy grain can be obtained by near liquidus pouring

and grain accumulate severe energy of deformation through severely distortion and breaking during ECAE process

which results in the gradual transformation of grain into near-spherical and spherical structure with the increase of grain size.

关键词

近液相线浇注等径角挤压半固态保温处理半固态坯料

Keywords

Near-liquidus PouringECAESemi-solid Isothermal TreatmentSemi-solid Billets

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Preparation of Semi-solid AlSi30 Billets by SIMA Method

Microstructure of Near-liquidus Semi-continuously Casting 6061 Aluminum Alloy

Effects of Internal Fillet Radiuses on ECAE （Equal Channel Angular Extrusion） AZ31 Magnesium Alloy Based on FEM （Finite Element Method）

Semi-solid Isothermal Compression Behavior of ECAE-Formed 6061 Aluminum Alloy

Prepration of Mg₉7Ni₁Gd₁Nd₁ Semi-solid Billets by Pulsed Magnetic Field Combined with Isothermal Heat Treatment

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