重稀土硅铁对焊缝金属冲击断口的影响

EFFECT OF HEAVY RARE EARTH & SILICOFERRITE ELEMENTS ON NOTCH FRACTURE OF WELD METAL

采用扫描电子显微镜（SEM）研究了重稀土硅铁对低合金高强钢焊缝金属低温冲击韧性的断口的影响，结果表明，向焊缝金属过渡适量的重稀土硅铁，可以有效地改善焊缝断口的形貌特征，提高焊缝的低温冲击韧性。

It has been studied the effect of heavy rare earth & silicoferrite elements on notch fracture of HSLA weld metal by SEM. The result shows,it is effective to improve the fracture faces and promote the low temperature toughness of weld metal by transferring trace heavy rare earth elements.