Feasibility study of welding dissimilar Advanced and Ultra High Strength Steels



: Bayock FN, Kah P, Salminen A, Belinga M, Yang XC

Publisher: DE GRUYTER POLAND SP Z O O

: 2020

: Reviews on Advanced Materials Science

: REVIEWS ON ADVANCED MATERIALS SCIENCE

: REV ADV MATER SCI

: 59

: 1

: 54

: 66

: 13

: 1606-5131

: 1605-8127

DOI: https://doi.org/10.1515/rams-2020-0006

: https://research.utu.fi/converis/portal/detail/Publication/47792105


This study concerns the weldability of dissimilar Ultra high-strength steel (UHSS) and advanced high-strength steel (AHSS), which is used in the modern machine industry. The materials offered superior strength as well as relatively low weight, which reduces microstructure contamination during a live cycle. The choice of the welding process base of the base material (BM) and welding parameters is essential to improve the weld joint quality. S700MC/S960QC was welded using a gas metal arc welding (GMAW) process and overmatched filler wire, which was performed using three heat input (7, 10, and 15 kJ/cm). The weld samples were characterized by a Vickers-hardness test, scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The test reveals a decrease of softening areas in the HAZ and the formation of the stable formation of Bainite-Ferrite for S700MC and Bainite-martensite for S960QC when the heat input of 10 kJ/cm is used. It is recommended to use the GMAW process and Laser welding (Laser beam-MIG), with an optimal welding parameter, which will be achieved a high quality of manufacturing products.

Last updated on 2024-26-11 at 12:18