Effect of laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steel

doi:10.1007/s40195-019-00974-4

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	Effect of laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steel
	Ebrahimnia, Mohamad 1; Xie, Yujiang 1; Chi, Changtai 2
刊名	ACTA METALLURGICA SINICA-ENGLISH LETTERS
	2020-04-01
卷号	33 期号:4 页码:528-538
关键词	Direct laser metal deposition Bainite Equiaxed ferrite Void Steel Microstructure Mechanical properties Rapid solidification
ISSN号	1006-7191
DOI	10.1007/s40195-019-00974-4
通讯作者	Xie, Yujiang(Yjxie@imr.ac.cn)
英文摘要	Direct laser metal deposition was used for preparing blocks of steel 12CrNi2 using four different laser powers under two different deposition environments including atmospheric environment and Ar-protected chamber. The results showed that microstructures and mechanical properties were significantly affected by different laser powers. Increasing laser power and deposition in Ar chamber will lead to a decrease in the quantity and size of the voids, which brings more elongation to the samples. Bainitic microstructure was replaced by Widmanstatten ferrite and pearlite, and the amount of proeutectoid ferrite increased with increasing laser power. Moreover, microstructures of previous layers were completely altered in high laser power. Excessive heat accumulation by using high heat input can produce equiaxed ferritic grains with the pearlites in previously deposited layers. Hardness of deposited samples increased from the bottom layer toward the top layer. By using a diode laser with a spot diameter size of 2 mm, the 900-W laser power is suitable for producing crack- and void-free samples. However, post-deposition heat treatment is necessary for obtaining homogeneous desired microstructure and grain size in the manufactured samples.
资助项目	National Key Research and Development Program of China[2016YFB1100203]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
WOS记录号	WOS:000529992200001
资助机构	National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/138704]
专题	金属研究所_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 laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steel[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2020,33(4):528-538.
APA	Ebrahimnia, Mohamad,Xie, Yujiang,&Chi, Changtai.(2020).Effect of laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steel.ACTA METALLURGICA SINICA-ENGLISH LETTERS,33(4),528-538.
MLA	Ebrahimnia, Mohamad,et al."Effect of laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steel".ACTA METALLURGICA SINICA-ENGLISH LETTERS 33.4(2020):528-538.