求翻译：本文以废热锅炉筒体环焊缝开裂失效分析为背景，所查文献表明这种焊缝处开裂的事故往往是更换新材料后不久仍然会发生是什么意思？

Waste heat boiler tube girth weld cracking failure analysis as the background, the literature search showed that the weld cracking accident is often replaced with new material shortly after still occur

This paper provides a waste heat boiler barrel ring cracks failure analysis in the background, the literature indicates that this is the weld cracking incident is often replaced with a new material will still occur shortly after

This article take the waste heat boiler tube body link welded joint dehiscence expiration analysis as a background, after looks up the literature to indicate this kind of welded joint place dehiscence the accident often was replaces the new material still to be able to occur soon

This article for girth weld fracture analysis on waste heat boiler barrel to background, weld cracking accident of check the literature indicates that this tends to be replaced shortly after the new material will still occur

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