Research on welding process of harmonious electric locomotive bogie frame traction seat
Welding process research of MAG welding on appearance,microstructure and mechanical property of bogie frame traction seat of a harmonious electric locomotive was investigated in the paper.The results showed that in the established conditions of welding process,the welds of the bogie frame traction seat of the harmonious electric locomotive were in good shape after MAG welding,and the magnetic particle inspection was qualified.The welded joint detection results met requirements of ISO 5817 B-level.The microstructure of weld heat-affected zone was fine massive ferrite+pearlite,the weld microstructure was mainly proeutectoid ferrite,bainite and pearlite.The Vickers hardness test showed that the hardness of the weld joint was moderate,and the joint had a small tendency to harden,making it insensitive to cold cracking.
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