Abstract
The microstructure and the mechanical properties of welding joint with the material of R60702 have been studied in this paper with the specimens made with the method of argon-arc welding, and the according mechanical properties of the weld joint have been compared with the annealed microstructure at the temperature of 600.Conclusions have been obtained as follows: The organizations of the welding joint include base material, normalizing zone, overheated area, fusion zone and the weld zone; the hardness tendency of the weld joint is depicted as W-shape with the hardest point located at the center, and the softest points is located at the normalizing zone; the annealing treatment can improve the ductility and soften the weld joint mainly at the center.
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