Laser Welding of New Grade of Advanced High Strength Steel STRENX 1100 MC

Archives of Metallurgy and Materials

Piwnik J.¹  Lisiecki A.²  Kurc-Lisiecka A.³ 

[1] BIALYSTOK UNIVERSITY OF TECHNOLOGY, MECHANICAL FACULTY, 45C WIEJSKA STR., 16-351 BIAŁYSTOK, POLAND;SILESIAN UNIVERSITY OF TECHNOLOGY, FACULTY OF MECHANICAL ENGINEERING, WELDING DEPARTMENT, 18A KONARSKIEGO STR.,41-100 GLIWICE, POLAND;WSB UNIVERSITY OF CHORZÓW, FACULTY OF WSB UNIVERSITY IN POZNAŃ, DEPARTMENT OF MANAGEMENT ENGINEERING, 29 SPORTOWA STR., 42-506 CHORZÓW, POLAND;

关键词: laser welding;    disk laser;    advanced high strength steel;    fine-grain steel;    butt joint;   

DOI  :  10.1515/amm-2017-0253

来源: DOAJ

【 摘 要 】

The article presents results of investigations on autogenous laser welding of new grade STRENX 1100 MC steel. The modern Disk laser was applied for of 5.0 mm thick butt joints welding. The influence of laser welding parameters, mainly the energy input of laser welding on the penetration shape, weld quality, structure and mechanical performance was investigated. It was found that the investigated steel has surprisingly low carbon equivalent CET just 0.328, and also relatively high temperature of martensitic transformation Ms at 430.6°C. Despite very rapid cooling times t8/5 in a range from 0.6 to 1.3 s, thus rapid solidification there was no tendency to cracking of weld metal or HAZ. Significant drop of microhardness in the HAZ resulted in a decrease of tensile strength of joints, compared to the base metal. Impact toughness of test joints was at only 50÷60% of the base metal.

【 授权许可】

Unknown