Joint Microstructure and Properties of D36 Steel Using Narrow Gap Laser Welding

doi:10.3788/LOP202158.1714008

	Joint Microstructure and Properties of D36 Steel Using Narrow Gap Laser Welding
	Chai Xutian 1; Yin Yan1 ; Wang Zhipeng 1; Dong Kaiji 1; Li Zhihui 1; Zhang Ruihua 2,3
	2021-09
发表期刊	LASER & OPTOELECTRONICS PROGRESS
ISSN	1006-4125
卷号	58 期号:17
摘要	The low-alloy and high-strength steel D36 is joined by narrow-gap laser wire-filled welding, which results in good multi-layer and multi-pass thick plate welding without cracks, pores, and other defects after welding. The microstructure and mechanical properties of the welded joints are analyzed by the tension and bending test, microhardness test, microstructure observation, and other analytical methods. The results show that the coarse-grained heat- affected zone consists of a large number of lamellar martensite, and the microstructure of the finegrained zone is composed of the fine-grained pearlite and ferrite. The weld center structure is proeutectoid ferrite + acicular ferrite + granular bainite. The regions with filler wire weld bead hardness in order from high to low is heat affected zone, weld center, and base material. The regions with laser primer welding hardness in order from high to low is weld center, heat affected zone, and base metal. The tensile specimens of the welded joints all fractured at the base metal position. The fracture is at an angle of 45 degrees with the force direction, and there is obvious necking, which is a typical ductile fracture. The average tensile strength of the welds is 537 MPa, and the average elongation after fracture is 15. 6%.
关键词	laser technique narrow gap filler wire welding mechanical properties microstructure
DOI	10.3788/LOP202158.1714008
收录类别	ESCI
语种	中文
WOS研究方向	Engineering ; Optics
WOS类目	Engineering, Electrical & Electronic ; Optics
WOS记录号	WOS:000752851300034
出版者	SHANGHAI INST OPTICS & FINE MECHANICS, CHINESE ACAD SCIENCE
来源库	WOS
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/155617
专题	材料科学与工程学院
通讯作者	Yin Yan
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China; 2.China Iron & Steel Res Inst Grp, Beijing 100081, Peoples R China; 3.Hardware Knife Cut Ind Technol Res Inst Yangjiang, Yangjiang 529533, Guangdong, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Chai Xutian,Yin Yan,Wang Zhipeng,et al. Joint Microstructure and Properties of D36 Steel Using Narrow Gap Laser Welding[J]. LASER & OPTOELECTRONICS PROGRESS,2021,58(17).
APA	Chai Xutian,Yin Yan,Wang Zhipeng,Dong Kaiji,Li Zhihui,&Zhang Ruihua.(2021).Joint Microstructure and Properties of D36 Steel Using Narrow Gap Laser Welding.LASER & OPTOELECTRONICS PROGRESS,58(17).
MLA	Chai Xutian,et al."Joint Microstructure and Properties of D36 Steel Using Narrow Gap Laser Welding".LASER & OPTOELECTRONICS PROGRESS 58.17(2021).