Microstructures and Mechanical Properties of Aluminum Alloy Lamp Cover by Squeeze Casting

Cheng Kesheng; Wang Jianmin; Zheng Zhiwen; Jiang Yinfang; Sun Jue; Chen Yue; Zhao Yan; Wan Li

doi:10.15980/j.tzzz.2014.06.016

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Microstructures and Mechanical Properties of Aluminum Alloy Lamp Cover by Squeeze Casting
Vol. 34, Issue 6, Pages: 609-612(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.06.016

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[1]程科升,汪建敏,郑志文,姜银方,孙珏,陈跃,赵龑,万里.挤压铸造铝合金机场跑道灯盖的显微组织与力学性能[J].特种铸造及有色合金,2014,34(06):609-612.

Cheng Kesheng, Wang Jianmin, Zheng Zhiwen, et al. Microstructures and Mechanical Properties of Aluminum Alloy Lamp Cover by Squeeze Casting. [J]. Special Casting & Nonferrous Alloys 34(6):609-612(2014)
[1]程科升,汪建敏,郑志文,姜银方,孙珏,陈跃,赵龑,万里.挤压铸造铝合金机场跑道灯盖的显微组织与力学性能[J].特种铸造及有色合金,2014,34(06):609-612. DOI： 10.15980/j.tzzz.2014.06.016.

Cheng Kesheng, Wang Jianmin, Zheng Zhiwen, et al. Microstructures and Mechanical Properties of Aluminum Alloy Lamp Cover by Squeeze Casting. [J]. Special Casting & Nonferrous Alloys 34(6):609-612(2014) DOI： 10.15980/j.tzzz.2014.06.016.

摘要

针对机场跑道铝合金灯盖零件高强度、高塑性、抗冲击的要求

确定了间接挤压铸造工艺方案和参数

用卧式10000kN挤压铸造机

成功挤铸了直径为300mm的灯盖。通过力学性能测试及金相显微镜、扫描电镜观察

分析了灯盖的显微组织和力学性能。结果表明

在浇注温度为640

70℃

模具温度为240℃左右

挤压压力为100MPa

冲头速度为0.10

.12m/s时

铸件外观无铸造缺陷

表面粗糙度低

内部组织致密

无缩孔、缩松缺陷。T6状态下

铸件整体综合力学性能良好

抗拉强度达到297MPa

伸长率为9.4%

满足使用技术要求。

Abstract

According to the structure and the performance characteristics including high strength

high ductility and impact resistance

the indirect squeeze casting process scheme and the process parameters were determined.The lamp cover with300mm in diameter was successfully manufactured by 10 000kN horizontal squeeze casting machine.In addition

the microstructures and mechanical properties of the lamp cover manufactured were investigated by tensile testing

optical microscope and scanning electronic microscope.The results show that the aluminum alloy lamp covers have satisfied appearances and surface quality and absence of macro defects such as shrinkage porosity and cavity with the pouring temperature of 640

70℃

the mold temperature of 240℃

the casting pressure of 100MPa and the punching velocity of 0.10

.12m/s.After T6treatment

tensile strength and elongation of the lamp cover reach 297MPa and 9.4%

respectively

meeting the requirement.