Effect of Heat Treatment on Microstructure and Microhardness of CoCrW Alloys Processed by Selective Laser Melting

doi:10.3788/CJL201946.1002002

	Effect of Heat Treatment on Microstructure and Microhardness of CoCrW Alloys Processed by Selective Laser Melting
	Yin, Yan 2; Kang, Ping 2; Xiao, Mengzhi 1; Zhang, Ruihua 1,3; Lu, Chao 1; Zhang, Yuan 2; Qu, Yuebo 1,3
刊名	Zhongguo Jiguang/Chinese Journal of Lasers
	2019-10-10
卷号	46 期号:10
关键词	Chromium alloys Chromium metallography Cobalt alloys Cobalt metallography Grain boundaries Heat treatment Low temperature operations Melting Microhardness Microstructure Phase composition Scanning electron microscopy Selective laser melting Software testing Temperature Ternary alloys Tungsten metallography Effect of heat treatments Equilibrium phase diagrams Heat treatment process Heat treatment temperature Laser technique Precipitate phasis Selective laser melting (SLM) X ray diffractometers
ISSN号	02587025
DOI	10.3788/CJL201946.1002002
英文摘要	Well formed bulk CoCrW alloys are fabricated by selective laser melting (SLM) and the effect of the heat treatment process on the phase composition, microstructure, and microhardness of the CoCrW alloy is studied. The equilibrium phase diagram of CoCrW alloy is simulated and calculated by JMATPro software, and the X-ray diffractometer, scanning electron microscopy, and microscopic hardness tester are used to test the phase composition, microstructure, and microhardness of the CoCrW alloy before and after heat process. Results show that the original SLM sample mainly comprises γ phase and a trace amount of Ε phase. After heat treatment, a large portion of γ phase is transformed into Ε phase, and the lump- and strip-like precipitate phases are produced. The size of the precipitated phase at the fusion line is large under low temperature heat treatment, and it is clearly different from those of other regions. The grain boundary and grain size of the precipitated δ phase grow with the increasing heat treatment temperature. Simultaneously, the difference in the precipitated phase size at the fusion line decreases. The microhardness of the CoCrW alloy decreases after heat treatment, especially for heat treatment at 1100 followed by water cooling. © 2019, Chinese Lasers Press. All right reserved.
WOS研究方向	Optics
语种	中文
出版者	Science Press
WOS记录号	WOS:000582676100012
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114685]
专题	材料科学与工程学院
作者单位	1.Central Iron and Steel Research Institute, Beijing; 100081, China; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 3.Yangjiang Hardware Knife Cut Industrial Technology Research Institute, Yangjiang; Guangdong; 529533, China
推荐引用方式 GB/T 7714	Yin, Yan,Kang, Ping,Xiao, Mengzhi,et al. Effect of Heat Treatment on Microstructure and Microhardness of CoCrW Alloys Processed by Selective Laser Melting[J]. Zhongguo Jiguang/Chinese Journal of Lasers,2019,46(10).
APA	Yin, Yan.,Kang, Ping.,Xiao, Mengzhi.,Zhang, Ruihua.,Lu, Chao.,...&Qu, Yuebo.(2019).Effect of Heat Treatment on Microstructure and Microhardness of CoCrW Alloys Processed by Selective Laser Melting.Zhongguo Jiguang/Chinese Journal of Lasers,46(10).
MLA	Yin, Yan,et al."Effect of Heat Treatment on Microstructure and Microhardness of CoCrW Alloys Processed by Selective Laser Melting".Zhongguo Jiguang/Chinese Journal of Lasers 46.10(2019).