STUDY ON NON-METALLIC INCLUSIONS IN LASER-WELDED TRIP-AIDED Nb-MICROALLOYED STEEL

被引：26
作者：
Grajcar, A. [1 ]
Rozanski, M. [2 ]
Kaminska, M. [3 ]
Grzegorczyk, B. [1 ]
机构：
[1] Silesian Tech Univ, Inst Engn Mat & Biomat, 18A Konarskiego Str, PL-44100 Gliwice, Poland
[2] Welding Inst, PL-44100 Gliwice, Poland
[3] Inst Nonferrous Met, PL-44100 Gliwice, Poland
来源：
ARCHIVES OF METALLURGY AND MATERIALS | 2014年 / 59卷 / 03期
关键词：
TRIP steel; non-metallic inclusions; laser welding; multiphase microstructure; retained austenite; fusion zone; heat-affected zone; RETAINED AUSTENITE; TRANSFORMATION; MICROSTRUCTURE; WELDABILITY; EVOLUTION; HEAT; AL;
D O I：
10.2478/amm-2014-0203
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The work concerns the studies on non-metallic inclusions occuring in laser-welded Si-Al TRIP steel containing Nb and Ti microadditions. Laser welding tests of 2 mm thick thermomechanically rolled sheets were carried out using keyhole welding and a solid-state laser. The results of laser welding in the air atmosphere for the heat input value of 0.048 kJ/mm are included. The distribution, type and chemical composition of non-metallic inclusions formed in the base metal, heat-affected zone, and fusion zone are analysed in detail. It was found that the base metal contains rare, fine oxysulphides. Their chemical composition was modified by rare earth elements. Numerous oxide inclusions of a various size and a chemical composition occur in the fusion zone. The dependence between a size of particles and their chemical composition was observed. A microstructure of steel was assessed using light microscopy and scanning electron microscopy techniques.
引用
收藏
页码：1163 / 1169
页数：7
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