Test on Fatigue Resist Ability of Metallic Materials Based on Anti-Welding-Heating Treatment

The test piece which was made from metal material such as 16MnR,Q235 and 20g was processed using anti-welding-heating treatment.The stress and fatigue was tested for the processed piece.Through the data analysis,it was obtained that anti-welding-heating treatment is a kind of effective technology about adjusting the welding residual stress,which can decrease the welding residual tensile stress of the metal material.If the difference in temperature is big enough,a bidirectional compress residual stress layer will be formed on the processed metals surface,which can improve fatigue resistance ability of metal material.