Microstructure and properties of 1100 MPa grade low-carbon hot-rolled steel by laser welding

被引：0

作者：

Chen Dong

Ai-min Zhao

Xi-tao Wang

Qi-hang Pang

Hui-bin Wu

机构：

[1] University of Science and Technology Beijing,Collaborative Innovation Center of Steel Technology

[2] University of Science and Technology Beijing,Engineering Research Institute

来源：

Journal of Iron and Steel Research International | 2018年 / 25卷

关键词：

Hot-rolled steel; Laser welding; Microstructure; Mechanical property; Element distribution;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The microstructure and mechanical properties of the butt joint of 1100 MPa grade hot-rolled low-carbon steel by laser welding were investigated by scanning electron microscopy, micro-hardness and tensile tests. The yield strength and tensile strength of the laser welded joint reached 100.2 and 99.5% of the base material (BM), respectively. However, the elongation of the welded joint only reached about 60% of BM. The lowest and highest hardness areas both existed in the incomplete recrystallization zone. The width of the softened area of the welded joint is about 240–260 μm. The element distribution has no obvious change for C, Cr, Si, Mn, Ti, etc.

引用

页码：228 / 234

页数：6

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