Investigations of Microstructure of Resistance Spot-Welded Joints Made of HSLA340 and DP600 Steels / Badanie Mikrostruktury Złączy Zgrzewanych Punktowo Ze Stali HSLA340 I DP600

Archives of Metallurgy and Materials

M. Korzeniowski¹  A. Ambroziak¹  A. Ignasiak² 

[1] INSTITUTE OF MACHINE ENGINEERING AND AUTOMATION OF WROCLAW UNIVERSITY OF TECHNOLOGY - WELDING DIVISION, UL. ?UKASIEWICZA 5, 50-371 WROC?AW, POLAND;STUDENT OF MECHANICAL FACULTY OF WROCLAW UNIVERSITY OF TECHNOLOGY - THE RUDOLF HAIMANN STUDENTS’ SCIENTIFIC CIRCLE

关键词: Keywords: resistance spot welding;    high-strength steel;    metallographic examination;   

DOI  :  10.2478/v10172-012-0120-6

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The paper presents results of metallographic investigations of spot welds made of high-strength steel HSLA340 and dual-phase DP600 steel. Low-carbon martensite microstructure was found in the weld nugget of HSLA steel. The DP600 steel shows martensite and bainite microstructure. For both steels, no carbides of microadditives were found because they dissolved in liquid nugget and could not precipitate again because of rapid heat abstraction. Moreover, no transcrystallisation was found in both steels, which proves good mixing of the materials within the weld.

【 授权许可】

Unknown