Transactions of Materials and Heat Treatment

Title：Effect of forging start-up time on microstructure and mechanical properties of

Authors： Wang Shuncheng Niu Yanping Zheng Kaihong Qi Wenjun

Unit： Guangdong General Research Institute of Industrial Technology

KeyWords： casting-forging integrated forming forging start-up time A356 alloy automobile brake caliper

ClassificationCode：

year,vol(issue):pagenumber：2014,39(1):131-135

Abstract：

The casting-forging integrated technology was adopted to prepare A356 aluminum alloy automobile brake calipers. The effects of forging start-up time on microstructure and mechanical properties of A356 aluminum alloy automobile brake calipers were studied. Results show that with the prolonging of forging start-up time, the ultimate tensile strength and elongation of A356 aluminum alloy automobile brake calipers are increasing due to the forced feeding and microstructure densification by forging. When the forging start-up time is more than 3 s, the shrinkage cavities and cracks within automobile brake calipers can be removed and the dendrite grains can be broken to fine grains. The ultimate tensile strength and elongation of A356 aluminum alloy automobile brake calipers with forging are 318.5 MPa and 6.6%, which are improved by 19.9% and 34.7% compared with that of A356 aluminum alloy automobile brake calipers without forging.

Funds：

国家科技部科研院所技术开发专项项目(2013EG115006);广东省教育部科技部产学研结合项目（2012B090600051）

王顺成（1976-），男，博士，高级工程师

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