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Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells

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文摘 A semisolid slurry of AZ31 magnesium alloy was prepared by vibrating wavelike sloping plate process, and the semisolid die forging process, microstructures, and properties of the magnesium alloy mobile telephone shell were investigated. The semisolid forging process was performed on a YA32-315 four-column universal hydraulic press. The microstructures were observed by optical microscopy, the hardness was analyzed with a model 450SVD Vickers hardometer, the mechanical properties was measured with a CMT5105 tensile test machine, and the fractograph of elongated specimens was observed by scanning electron microscopy (SEM). The results reveal that with the increase of die forging force, the microstructures of the product become fine and dense. A lower preheating temperature and a longer dwell time are favorable to the formation of fine and dense microstructures. The optimum process conditions of preparing mobile telephone shells with excellent surface quality and microstructures are a die forging force of 2000 kN, a die preheating temperature of 250°C, and a dwell time of 240 s. After solution treatment at 430°C and aging at 220°C for 8 h, the Vickers hardness is 61.7 and the ultimate tensile strength of the product is 193 MPa. Tensile fractographs show the mixing mechanisms of quasi-cleavage fracture and ductile fracture.
来源 International Journal of Minerals , Metallurgy and Materials,2011,18(6):665-670 【核心库】
DOI 10.1007/s12613-011-0493-y
关键词 magnesium alloys ; semisolid forging ; microstructure ; mechanical properties ; fracture
地址

1. College of Materials and Metallurgy, Northeastern University, Shenyang, 110004  

2. Northeastern University, State Key Lab of Rolling and Automation, Shenyang, 110004

语种 英文
文献类型 研究性论文
ISSN 1674-4799
学科 金属学与金属工艺
基金 国家自然科学基金 ;  国家教育部新世纪优秀人才支持计划
文献收藏号 CSCD:4381279

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引证文献 1 篇

1 Guan Renguo Microstructure and properties of A2017 alloy strips processed by a novel process by combining semisolid rolling, deep rolling, and heat treatment International Journal of Minerals, Metallurgy and Materials,2013,20(8):770-778
CSCD被引 1 次

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