Effect of Martensite Content on Microstructure and Properties of Laser Welded Dual -Phase Steel Joints

被引：0

作者：

Huan Pengcheng ^{[1
,2
]}

Chen Wengang ^{[1
]}

Wang Xiaonan ^{[2
]}

Zheng Zhi ^{[1
]}

Zhu Tiancai ^{[1
,2
]}

Zhang Min ^{[3
]}

Chen Changjun ^{[3
]}

机构：

[1] Southwest Forestry Univ, Sch Automobile & Transportat, Kunming 650221, Yunnan, Peoples R China

[2] Soochow Univ, Sch Iron & Steel, Suzhou 215021, Jiangsu, Peoples R China

[3] Soochow Univ, Sch Mech & Elect Engn, Suzhou 215021, Jiangsu, Peoples R China

来源：

LASER & OPTOELECTRONICS PROGRESS | 2018年 / 55卷 / 11期

关键词：

laser technique; dual -phase steel; martensite content; microstructure; structural model; mechanical properties;

D O I：

10.3788/LOP55.111106

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A continuous fiber laser is used for the tailored blank laser welding of 800 MPa and 1000 MPa dual -phase (OP) steels and the effects of martensite content on the microstructure and properties of laser welded OP steel joints arc investigated. The results show that the laser welded OP steel joints with different martensite contents arc all composed of the full-martensite area and the non -full -phase-transformation area. The widths and microhardness of two laser welded joints arc relatively reduced, and their tensile fracture positions arc both in the base materials (BMs). The 1000 MPa welded DP steel joint directly cracks and expands along the non -full transformation area during the crichson test and its crichson value is 85.09 that of the BM. In contrast, the 800 MPa welded DP steel joint cracks perpendicular to the full-martensite area and its crichson value is up to 91.79 that of the BM.

引用

页数：8

共 19 条

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