Laser nitriding behavior of Ti-6Al-4V with different gas sources

doi:10.11817/j.ysxb.1004.0609.2020-39479

	Laser nitriding behavior of Ti-6Al-4V with different gas sources
	Li, Wen-Sheng 2; Zhang, Wen-Bin 2; Wu, Yan-Rong 1; Liang, Gang 1; Gao, Feng-Qin 2; Shi, Yu 2; Yu, Wei-Yuan 2; Yao, Xiao-Chun 2
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2020-04-01
卷号	30 期号:4 页码:817-828
关键词	Aluminum alloys Aluminum nitride Argon lasers Cracks Dendrites (metallography) Flow of gases Gas mixtures Hardness High power lasers Morphology Nitriding Nitrogen Scanning electron microscopy Semiconductor lasers Ternary alloys Textures Titanium nitride Vanadium alloys X ray diffraction analysis Cracking tendency Energy dispersions High power semiconductor laser Microstructure and mechanical properties Molten pool morphologies Needle-shaped grains Nitrogen gas flow Surface hardness
ISSN号	10040609
DOI	10.11817/j.ysxb.1004.0609.2020-39479
英文摘要	In two different ways of pure nitrogen and nitrogen argon mixing, a rectangular spot high-power semiconductor laser was used to nitride on surface of Ti-6Al-4V under different gas flow rates and nitrogen to argon mixture ratios. The effects of gas flow rates and gas mixture ratio of nitrogen to argon on nitriding molten pool morphology, nitriding microstructure and mechanical properties were studied. The microstructure, composition and phase composition of nitriding layer were studied by scanning electron microscopy(SEM), energy dispersion(EDS) and X-ray diffractometry(XRD). The results show that the uniform nitriding layer is obtained at pure nitrogen gas flow rate of 15 L/min. Continue to increase the gas flow, the flow of the nitriding molten pool is turbulent and the through cracks appear. The depth and hardness of the nitriding do not increase with the gas flow. When nitriding with different gas mixture ratios of nitrogen to argon, the surface hardness of the nitriding layer is lower than that of the nitriding layer at pure nitrogen nitriding, and the cracking tendency of the nitriding layer is weakened. The microstructure of the nitriding layer is three stable phases of TiN0.88, TiN0.61, TiN0.3 according to the layer depth in the range of 200 to 800 μm from the surface to the inner. Under pure nitrogen and different gas mixture ratios of nitrogen to argon for nitriding, the microstructure of nitriding layer is composed of coarse short dendrite, equiaxed grain, slender dendrite, fine needle-shaped grain, respectively. © 2020, Science Press. All right reserved.
语种	中文
出版者	Central South University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115289]
专题	材料科学与工程学院实验室建设与管理处
作者单位	1.Dongfang Turbine Co., Ltd., Dongfang Electric Corporation, Deyang; 618000, China 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Li, Wen-Sheng,Zhang, Wen-Bin,Wu, Yan-Rong,et al. Laser nitriding behavior of Ti-6Al-4V with different gas sources[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2020,30(4):817-828.
APA	Li, Wen-Sheng.,Zhang, Wen-Bin.,Wu, Yan-Rong.,Liang, Gang.,Gao, Feng-Qin.,...&Yao, Xiao-Chun.(2020).Laser nitriding behavior of Ti-6Al-4V with different gas sources.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,30(4),817-828.
MLA	Li, Wen-Sheng,et al."Laser nitriding behavior of Ti-6Al-4V with different gas sources".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 30.4(2020):817-828.