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通过对过热炉管受热冲击影响的事件考察,指出了在高温炉管的断裂中存在着超温引起过早的蠕变断裂,通常有明显的变形和热冲击导致快速的脆性断裂两种不同的机制.在失效成因的分析中,讨论了Manson-Haferd参量外推技术、热应力沿壁厚的分布和热冲击产生应力峰值问题,给出了热冲击的安全曲线.

参考文献

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[4] National Research Institute for Metals (NRIM) Creep Data Sheet[R].No.38A,Tokyo,Japan,1991
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