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应用变形速率连续可变式热裂纹试验方法（ＶＤＲ法）研究了碳、钼和稀土元素对奥氏体不锈钢焊缝热裂敏感性的影响。试验结果表明，降低奥氏体不锈钢熔敷金属中的碳含量并加入适量的钼可显著提高焊缝的抗热裂性能。稀土元素对焊缝的抗热裂性也有显著影响，加入适量稀土能减少焊缝中夹杂物的数量和大小，改变其成分及分布，提高抗裂性。但是如果加入过量，焊缝中会形成大量稀土夹杂物，降低奥氏体不锈钢焊缝的抗裂性。
The effect of carbon, molybdenum and rare earth elements on the thermal cracking susceptibility of austenitic stainless steel weld was investigated by VDR method. The test results show that reducing the carbon content in the weld metal of austenitic stainless steel and adding appropriate molybdenum can significantly improve the hot cracking resistance of the weld. Rare earth elements on the thermal cracking resistance of the weld also had a significant impact, adding the right amount of rare earth can reduce the amount of inclusions in the weld and size, change its composition and distribution, improve crack resistance. However, if added in excess, the weld will form a large number of rare earth inclusions, reducing the austenitic stainless steel weld crack resistance.