Nonequilibrium microstructures and their evolution in a Fe-Cr-W-Ni-C laser clad coating

doi:10.1016/S0921-5093(99)00159-8

IMECH-IR > 力学所知识产出(1956-2008)

	Nonequilibrium microstructures and their evolution in a Fe-Cr-W-Ni-C laser clad coating
	Wu XL(武晓雷); Chen GN(陈光南); Wu, XL (reprint author), Chinese Acad Sci, Inst Mech, Mat Res Ctr, Lab Nonlinear Mech Continuous Media, Beijing 100080, Peoples R China.
发表期刊	Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
	1999
卷号	270 期号:2 页码:183-189
ISSN	0921-5093
摘要	The laser-solidified microstructural and compositional characterization and phase evolution during tempering at 963 K were investigated using an analytical transmission electron microscope with energy dispersive X-ray analysis. The cladded alloy, a powder mixture of Fe, Cr, W, Ni, and C with a weight ratio of 10:5:1:1:1, was processed with a 3 kW continuous wave CO2 laser. The processing parameters were 16 mm/s beam scanning speed, 3 mm beam diameter. 2 kW laser power, and 0.3 g/s feed rate. The coating was metallurgically bonded to the substrate, with a maximum thickness of 730 mu m, a microhardness of about 860 Hv and a volumetric dilution ratio of about 6%. Microanalyses revealed that the cladded coating possessed the hypoeutectic microstructure comprising the primary dendritic gamma-austenite and interdendritic eutectic consisted of gamma-austenite and M7C3 carbide. The gamma-austenite was a non-equilibrium phase with extended solid solution of alloying elements and a great deal of defect structures, i.e. a high density of dislocations, twins, and stacking faults existed in gamma phase. During high temperature aging, in situ carbide transformation occurred of M7C3 to M23C6 and M6C. The precipitation of M23C6, MC and M2C carbides from austenite was also observed.
学科领域	力学
DOI	10.1016/S0921-5093(99)00159-8
收录类别	SCI
语种	英语
WOS记录号	WOS:000083046500010
关键词[WOS]	WEAR
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/16104
专题	力学所知识产出(1956-2008)
通讯作者	Wu, XL (reprint author), Chinese Acad Sci, Inst Mech, Mat Res Ctr, Lab Nonlinear Mech Continuous Media, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Wu XL,Chen GN,Wu, XL . Nonequilibrium microstructures and their evolution in a Fe-Cr-W-Ni-C laser clad coating[J]. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing,1999,270,2,:183-189.
APA	武晓雷,陈光南,&Wu, XL .(1999).Nonequilibrium microstructures and their evolution in a Fe-Cr-W-Ni-C laser clad coating.Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing,270(2),183-189.
MLA	武晓雷,et al."Nonequilibrium microstructures and their evolution in a Fe-Cr-W-Ni-C laser clad coating".Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 270.2(1999):183-189.

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