MICROSTRUCTURAL ASPECTS OF BIFOCAL LASER WELDING OF TRIP STEELS

被引：5

作者：

Grajcar, A. ^{[1
]}

Grzegorczyk, B. ^{[1
]}

Rozanski, M. ^{[2
]}

Stano, S. ^{[2
]}

Morawiec, M. ^{[1
]}

机构：

[1] Silesian Tech Univ, Inst Engn Mat & Biomat, 18A Konarskiego Str, PL-44100 Gliwice, Poland

[2] Inst Welding, 16-18 Bl Czeslawa Str, PL-44100 Gliwice, Poland

来源：

ARCHIVES OF METALLURGY AND MATERIALS | 2017年 / 62卷 / 02期

关键词：

TRIP steel; retained austenite; dual beam; laser welding; AHSS; hardness profile; DUAL-PHASE STEEL; NONMETALLIC INCLUSIONS; ALUMINUM; AL;

D O I：

10.1515/amm-2017-0090

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

This work is concerned with comparative tests involving single-spot and twin-spot laser welding of thermomechanically rolled TRIP steel. The welding tests were carried out using keyhole welding and a solid state laser. In the case of twin-spot laser beam welding, the power distribution of beams was 50%:50%. The changes in macro-and microstructures were investigated using light and scanning electron microscopy. Three main zones subjected to the tests included the fusion zone, the heat affected zone and the intercritical heat affected zone (transition zone between the base material and the HAZ). Special attention was paid to the effect of various thermal cycles on the microstructure of each zone and on martensite morphology. The tests involved hardness measurements carried out in order to investigate the effect of different microstructures on mechanical properties of welds.

引用

页码：611 / 618

页数：8

共 24 条

[1] Mechanical stability of individual austenite grains in TRIP steel studied by synchrotron X-ray diffraction during tensile loading [J].