高温炉管断裂的两种机制

1.南京工业大学,南京,210009

2.南京工业大学,南京,210009

3.塔里木油田分公司,新疆,泽普,844804

4.塔里木油田分公司,新疆,泽普,844804

Two Mechanisms for Fracture of Furnace Tube at Elevated Temperature

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.

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