Abstract:
A test piece was welded with 022Cr19Ni10 stainless steel/H62 brass dissimilar materials. When tin brass and silicon bronze welding materials were used for welding test, due to different chemical composition and anisotropy of crystal structure, the heat affected zone was affected by Cu
2O, and it led to cracks and porosity defects in the weld. The welding process test of 022Cr19Ni10 stainless steel/H62 brass butt structure was carried out by using the aluminum nickel bronze welding material. The mutual fusion between 022Cr19Ni10 stainless steel and H62 brass was realized, and it could solve the porosity and cracks caused by Cu
2O in the weld metal crystal structure. Combined with pulsed TIG welding method, the arc tension in the welding process was controlled by using appropriate welding parameters to solve the problem of unfusion welding between dissimilar materials and intergranular corrosion caused by Cr
23C
6. The welding specimen was tested by using radiographic test, tensile, bending tests, metallographic microstructure observation, energy spectrum analysis and intergranular corrosion test. The results show that the microstructure of the weld is fine, the mechanical properties of the welding specimen are excellent, and the test piece has good intergranular corrosion resistance.