The results show that the fracture times decrease and the thickness of remainder metal increase with the increase of argon flow, and the appropriate Ar flow was determined based on it.

• 结果表明,随着氩气流量的增加,生成的氧化层逐渐完整,试样半径中部剩余金属厚度逐渐增加,蠕变断裂时间逐渐减少,并根据试验结果确定合理的氩气流量值。