Microstructure and Mechanical Properties of Aluminum Alloy Sub-frame by Squeeze Casting Process

Yang Qing; Jiang Yinfang; Dai Yachun; Xu Ruozhen; Meng Xiangbao; Sun Jue

doi:10.15980/j.tzzz.2016.04.012

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Microstructure and Mechanical Properties of Aluminum Alloy Sub-frame by Squeeze Casting Process
Vol. 36, Issue 4, Pages: 376-378(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.04.012

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[1]杨青,姜银方,戴亚春,许若震,孟祥豹,孙珏.挤压铸造铝合金副车架的显微组织与力学性能[J].特种铸造及有色合金,2016,36(04):376-378.

Yang Qing, Jiang Yinfang, Dai Yachun, et al. Microstructure and Mechanical Properties of Aluminum Alloy Sub-frame by Squeeze Casting Process. [J]. Special Casting & Nonferrous Alloys 36(4):376-378(2016)
[1]杨青,姜银方,戴亚春,许若震,孟祥豹,孙珏.挤压铸造铝合金副车架的显微组织与力学性能[J].特种铸造及有色合金,2016,36(04):376-378. DOI： 10.15980/j.tzzz.2016.04.012.

Yang Qing, Jiang Yinfang, Dai Yachun, et al. Microstructure and Mechanical Properties of Aluminum Alloy Sub-frame by Squeeze Casting Process. [J]. Special Casting & Nonferrous Alloys 36(4):376-378(2016) DOI： 10.15980/j.tzzz.2016.04.012.

摘要

使用间接挤压铸造工艺和立式SCV-20 000kN挤压铸造机

生产了A356铝合金副车架。通过金相观察、力学性能测试和扫描电镜分析了副车架的显微组织和力学性能。结果表明

在浇注温度为690

10℃

压射比压为95 MPa

模具温度为240℃

保压时间为20s时

铸件表面无铸造缺陷

内部组织致密。T6条件下

铸件的抗拉强度为291 MPa

伸长率为9.2%

硬度（HBW）为96。台架试验证实挤压铸造汽车副车架疲劳性能符合要求

提高了整车的轻量化水平。

Abstract

The A356 alloy automotive sub-frame was produced by indirect squeeze casting.The process scheme and the processing parameters of indirect squeeze casting were determined.The sub-frame was manufactured successfully with the advanced 2000 Tvertical squeeze casting machine.The microstructure and mechanical properties of the sub-frame have been investigated by tensile testing

optical microscope and scanning electronic microscope.The results reveal that the sub-frame castings exhibit the satisfied appearance with compact structure and absence of casting defects with the pouring temperature of690

10℃

the casting pressure of 95 MPa

the mold temperature of 240℃and the holding time of 20 s.The tensile strength

elongation and hardness of aluminum alloy sub-frame specimen after T6 heat treatment can reach 291 MPa

9.2% and 96 HBW

respectively.With the bench test

the requirements of fatigue property can be satisfied and the lightweight level of vehicle is improved.