Study of Butt Welding Process between SA-336 F11 CL.2 and SA-765 Gr.Ⅱ Dissimilar Steels
For the welding of the two ASME materials,SA-336 F11 CL.2 and SA-765 Gr.Ⅱ,regardless of whether high-strength or low-strength matching welding material is chosen,it is necessary to address the issue of a significant difference in heat treatment temperature of the weld joints.Welding samples were prepared by surfacing the 0.5Mo insulation layer on the groove of SA-336 F11 CL.2 metal,and then butting the SA-765 Gr.Ⅱ metal,the microstructure and mechanical properties of the weld joints at different stages during the joint formation process were analyzed,and the feasibility and reliability of the method were verified.It is found that the method can effectively balance the temperature difference between SA-336 F11 CL.2 and SA-765 Gr.Ⅱ,and decrease the adverse effect of temperature difference on process performance of weld joint.
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