The experimental results show that the fatigue life of steel welded joints can be improved by grinding the weld bead, especially for the higher strength steel.
试验结果表明焊件的疲劳寿命可以通过打磨焊缝得到改善，尤其对于高强度钢焊件。
But the microhardness of the weld bead after heat treatment reduces by 60 HV, compared with origin welded joint.
与原始接头显微硬度值相比，经历高温热处理后接头的显微硬度降低约60 HV左右。
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