The effect of laser surface melting on grain refinement of phase separated Cu-Cr alloy

doi:10.1016/j.optlastec.2019.105577

CORC > 力学研究所 > 中国科学院力学研究所 > 先进制造工艺力学重点实验室

	The effect of laser surface melting on grain refinement of phase separated Cu-Cr alloy
	Zhang LT(张犁天); Yu G(虞钢); Li SX(李少霞); He XL(何秀丽); Jie XY(解晓宇); Xia CY(夏纯阳); Ning WJ(宁伟健); Zheng CY(郑彩云); Zheng CY(郑彩云); Yu G(虞钢)
刊名	OPTICS AND LASER TECHNOLOGY
	2019-11-01
卷号	119 页码:10
关键词	Laser surface melting (LSM) Microstructure Grain refinement Liquid phase separation (LPS) Interruption capability
ISSN号	0030-3992
DOI	10.1016/j.optlastec.2019.105577
通讯作者	Yu, Gang(gyu@imech.ac.cn)
英文摘要	Grain refinement and homogenization of Cr phase were achieved by laser surface melting (LSM) method, and the properties of Cu-Cr alloy were significantly improved. In this study, LSM of Cu-50Cr alloy (wt.%) was conducted with a high power density (10(6) -10(7) W/cm(2)) laser beam, the microstructure and the properties of melt layer were investigated. The size of Cr phase was effectively refined from hundreds of micron scale to several micron scale, and the average size of Cr particles decreased to a few hundred nanometers. High cooling rate effectively inhibited coarsening effect on the Cr particles during liquid phase separation. Spherical Cr particles were dispersed in the melt layer with a thickness of 165 +/- 20 mu m. Microhardness was obviously enhanced and the maximum hardness was 232HV, which was 2.8 times that of the substrate. Arc duration of the LSM treated contacts increased up to 18%. The withstanding voltage of the fixed and the moving contact increased to 28.7% and 35.4%, respectively. The results show that LSM is an effective method to refine the microstructure of Cu-Cr alloy, and it is a promising modification method for electrical Cu-Cr vacuum contacts.
资助项目	Instrument Developing Project of the Chinese Academy of Sciences[yz201636] ; National Natural Science Foundation of China[11672304] ; National Natural Science Foundation of China[11502269] ; National Natural Science Foundation of China[11272316] ; National Natural Science Foundation of China[11272317]
WOS关键词	MICROSTRUCTURE ; RESISTANCE ; STEEL
WOS研究方向	Optics ; Physics
语种	英语
WOS记录号	WOS:000482244400042
资助机构	Instrument Developing Project of the Chinese Academy of Sciences ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/79988]
专题	力学研究所_先进制造工艺力学重点实验室
推荐引用方式 GB/T 7714	Zhang LT,Yu G,Li SX,et al. The effect of laser surface melting on grain refinement of phase separated Cu-Cr alloy[J]. OPTICS AND LASER TECHNOLOGY,2019,119:10.
APA	张犁天.,虞钢.,李少霞.,何秀丽.,解晓宇.,...&Ning WJ.(2019).The effect of laser surface melting on grain refinement of phase separated Cu-Cr alloy.OPTICS AND LASER TECHNOLOGY,119,10.
MLA	张犁天,et al."The effect of laser surface melting on grain refinement of phase separated Cu-Cr alloy".OPTICS AND LASER TECHNOLOGY 119(2019):10.