The effect of laser surface melting on grain refinement of phase separated Cu-Cr alloy
文献类型：期刊论文
| 作者 | 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)
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| 刊名 | OPTICS AND LASER TECHNOLOGY
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| 出版日期 | 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. |
| WOS关键词 | MICROSTRUCTURE ; RESISTANCE ; STEEL |
| 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 |
| 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. |
入库方式： OAI收割
来源：力学研究所
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