Welding Effects on the Mechanical Integrity of a Trip800 Steel: a Comparison of Laser Co2 and Gmaw Processes/ Wpływ Spawania Na Integralność Mechaniczna Stali Trip800: Porównanie Spawania Laserowego Ze Spawaniem Elektrodą Topliwą

Archives of Metallurgy and Materials

A. Garza-Gomez¹  F.A. Reyes-Valdés¹  G.Y. Perez-Medina¹  H.F. Lopez²  Luis M. López-Ochoa³ 

[1] CORPORACIÓN MEXICANA DE INVESTIGACIÓN EN MATERIALES CALLE CIENCIA Y TECNOLOGIA #790, FRACC. SALTILLO 400, SALTILLO, COAH. MÉXICO;MATERIALS DEPARTMENT, UNIVERSITY OF WISCONSIN-MILWAUKEE, 3200 N. CRAMER STREET, MILWAUKEE WI 53201, USA;UNIVERSIDAD DE LA RIOJA. ESCUELA TÉCNICA SUPERIOR DE INGENIERIA INDUSTRIAL. APPLIED THERMODYNAMICS AND ENERGY GROUP OF RESEARCH. LA PAZ STREET 93, 26 LOGROÑO. LA RIOJA. SPAIN

关键词: Keywords: Laser;    gmaw;    retained austenite;    color metallography;   

DOI  :  10.2478/amm-2014-0243

学科分类：金属与冶金

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

【 摘 要 】

In this work a strip of a transformation induced plasticity (TRIP) steel was welded using gas metal arc welding (GMAW) and Laser CO2 welding (LBW) processes and the resultant strength and ductility of the welded joints evaluated. It was found that LBW lead to relatively high hardness in the fusion zone, FZ where the resultant microstructure was predominantly martensite. The relative volume fractions of phases developed in the welded regions were quantitatively measured using color metallography combined with X-ray diffraction analyses. It was found that the heat affected zone, HAZ developed the maximum amount of martensite (up to 32%) in the steel welded using LBW besides a mixture of bainite, retained austenite and ferrite phases. In contrast, a relatively low percent of martensite (10.8%) was found in the HAZ when the GMAW process was implemented.

【 授权许可】

Unknown