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

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	Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells
其他题名	Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells
	Guan Renguo 1; Chen Liqing 2; Cao Furong 1; Zhao Zhanyong 1; Ren Yong 2
	2011
发表期刊	INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
ISSN	1674-4799
卷号	18 期号:6 页码:665-670
摘要	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 degrees C, and a dwell time of 240 s. After solution treatment at 430 degrees C and aging at 220 degrees 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.
其他摘要	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.
关键词	SLOPING PLATE PROCESS ALUMINUM-ALLOY ALSI7MG STATE magnesium alloys semisolid forging microstructure mechanical properties fracture
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Ministry of Education of China]
CSCD记录号	CSCD:4381279
引用统计	被引频次：1[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/145416
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.东北大学
推荐引用方式 GB/T 7714	Guan Renguo,Chen Liqing,Cao Furong,et al. Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2011,18(6):665-670.
APA	Guan Renguo,Chen Liqing,Cao Furong,Zhao Zhanyong,&Ren Yong.(2011).Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,18(6),665-670.
MLA	Guan Renguo,et al."Semisolid die forging process, microstructures and properties of AZ31 magnesium alloy mobile telephone shells".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 18.6(2011):665-670.