Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel

doi:10.2351/7.0000214

IMR OpenIR

	Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel
	Ebrahimnia, Mohamad 1; Xie, Yujiang 1; Chi, Changtai 2
通讯作者	Xie, Yujiang(Yjxie@imr.ac.cn)
	2021-02-01
发表期刊	JOURNAL OF LASER APPLICATIONS
ISSN	1042-346X
卷号	33 期号:1 页码:12
摘要	Direct laser metal deposition of a medium carbon low alloy steel was performed on a round bar sample. Taguchi design was used to investigate the effect of three process parameters with three different levels on the microstructure and properties of single- and multitrack clad samples. Microstructural analysis showed that coalesced bainite and lath martensite exist in the clad area. Two different kinds of cracks occurred in multitrack clad samples. When laser power is not sufficient or scanning speed is high, cracks can occur in the laser clad area because of the accumulation of trapped defects inside the molten pool, e.g., inclusions, voids, and low melting point constituents alongside insufficient molten metal back-filling at interdendritic regions. These cracks can be considered as solidification cracks. Another type of cracks can occur in previous tracks of multitrack clads which actually are the heat affected zones (HAZ) of newly deposited clad tracks, because of high tensile stress on HAZ and the presence of oxide and sulfide constituents at interdendritic regions. These cracks can be considered as reheating cracks. According to the result of Taguchi design experiments, using optimum laser parameters like high laser power, medium scanning speed, and sufficient powder feed rate, crackfree clad layers can be obtained via the prevention of formation of unfavorable constituents at interdendritic regions.
关键词	direct metal deposition laser cladding crack low alloy steel
资助者	National Key Research and Development Program of China
DOI	10.2351/7.0000214
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2016YFB1100203]
WOS研究方向	Materials Science ; Optics ; Physics
WOS类目	Materials Science, Multidisciplinary ; Optics ; Physics, Applied
WOS记录号	WOS:000600227600002
出版者	AMER INST PHYSICS
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/158771
专题	中国科学院金属研究所
通讯作者	Xie, Yujiang
作者单位	1.Zhejiang Handsome Intelligent Remfg Technol Co Lt, Jiaxing 314000, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ebrahimnia, Mohamad,Xie, Yujiang,Chi, Changtai. Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel[J]. JOURNAL OF LASER APPLICATIONS,2021,33(1):12.
APA	Ebrahimnia, Mohamad,Xie, Yujiang,&Chi, Changtai.(2021).Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel.JOURNAL OF LASER APPLICATIONS,33(1),12.
MLA	Ebrahimnia, Mohamad,et al."Effect of cladding parameters on microstructure and defects in direct laser metal deposition of 24CrNiMo steel".JOURNAL OF LASER APPLICATIONS 33.1(2021):12.