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换热式转化炉炉管断裂失效分析

Heat Treatment of Metals(2015)

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Abstract
通过化学成分分析、力学性能测试和断口分析等手段对断裂的换热式转化炉炉管进行了失效分析。结果表明,该炉管在使用过程中严重超温,导致了局部晶界液化及开裂,在收缩热应力及管承压差应力的继续作用下,热裂纹进一步扩展而形成脆性断裂。通过模拟热处理试验,推断失效炉管的温度至少达到1255℃。
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