EVALUATION OF MICROSTRUCTURE AND SELECTED MECHANICAL PROPERTIES OF LASER BEAM WELDED S690QL HIGH-STRENGTH STEEL

被引：20
|
作者：
Tuz, L. [1 ]
机构：
[1] AGH Univ Sci & Technol Krakow, Fac Met Engn & Ind Comp Sci, Dept Phys Met & Powder Met, Krakow, Poland
来源：
ADVANCES IN MATERIALS SCIENCE | 2018年 / 18卷 / 03期
关键词：
high-strength steel; microstructure; laser welding;
D O I：
10.1515/adms-2017-0039
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The paper presents results of microstructure and mechanical properties investigation of laser beam welded high-strength steel. Material for test was non-alloyed steel with yield strength of 690 MPa after quenching and tempering in delivery condition. Research carried out on the butt-welded joints shows fine-grain martensitic-bainitic structure of base metal and in the weld. Investigations of mechanical properties revealed the softened zone in HAZ where the hardness decrease without microstructural changes was observed. Moreover, an influence of softened zone and HAZ width on impact strength was observed where the occurrence of lower hardness led to fracture path deviation phenomenon.
引用
收藏
页码：34 / 42
页数：9
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