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In this study, AISI 430 and HARDOX 500 steels were joined by cold metal transfer (CMT) welding method. The properties and microstructural changes of the welding and HAZ regions were investigated by OM and SEM analyses. Microhardness, notch impact, and tensile tests were performed to determine the mechanical properties of the welded specimens. The ruptured surfaces of the test specimens after the impact test were examined using SEM. Coarse grains were formed in the HAZ regions but were limited to the low-temperature input of the cold metal transfer welding. The N3 specimen was broken from AISI 430 base metal and the elongation amount was 16.32 mm. Tensile strengths were from 380 to 493 MPa. The mechanical properties of AISI 430 and HARDOX 500 steels combined with CMT welding increased significantly and weldability was proven possible.

Weldability and mechanical behavior of CMT welded AISI 430 and HARDOX 500 steels