【摘要】 通过对30CrMnSiA钢的双脉冲、三脉冲点焊及其性能试验发现,点焊核心为回火组织时,其性能并不是最好,当核心组织中心为小区域淬硬,边缘为回火组织时,点焊接头的抗拉、抗剪等机械性能更好。更多还原

【Abstract】 In the case of normal spot welding on the material with tendenoy to harden, the nugget will appear hardened structure. While the spot welding is conducted on 30CrMnSiA steel with double and triple pulse currents, it is found that the mechanical properties with tempered structure on the nugget is not so good as that with hardened structure in the center rounded with tempered structure outside on the nugget as evaluation is carried out from tension and shear tests on spot welding joints.更多还原