Failure Analysis on Bulging of 30CrMo Pipe during Hot Processing
摘 要
采用宏观检验、化学成分分析、金相检验、扫描电镜和能谱分析等手段, 对某30CrMo钢管件鼓起失效的原因进行了分析。结果表明: 管件热加工过程中炉温的异常波动或管件剧烈摩擦使得管件温度过高, 氧侵入晶界或原缺陷(如裂纹)处产生严重氧化脱碳甚至过烧, 使得管件材料脆化, 并且热旋压刮板的轻微松动使管件变形时受力不均, 最后导致管件热压缩过程中在管件脆化区域产生鼓起和折皱失效。
Abstract
Failure reason of bulging on a 30CrMo pipe was analyzed by means of macroscopic examination, chemical composition analysis, metallographic examination, SEM and EDS analysis. The results showed that the over high temperature was caused by unstable temperature of stove or the friction of pipe in hot processing, the oxygen intruded into the grain boundary and the defect such as crack, and caused oxidation decarbonization and overburnning, then embrittlement was happened in the pipe. On the other hand, the loose of hot spinning scraper led to the uneven forces during pipe deformation. Finally, the wall of pipe was bulged and folded at the embrittlement area during hot processing.
中图分类号 TG157
所属栏目 质量控制与失效分析
基金项目
收稿日期 2012/8/23
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备注许万剑(1987-), 男, 工学硕士。
引用该论文: XU Wan-jian,HUANG Jin-fu,LI Yun,YE Lan-biao,YANG Chun-li,DING Fei. Failure Analysis on Bulging of 30CrMo Pipe during Hot Processing[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2013, 49(5): 346~348
许万剑,黄金富,李运,叶兰标,杨春丽,丁非. 30CrMo钢管件热加工鼓起失效分析[J]. 理化检验-物理分册, 2013, 49(5): 346~348
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参考文献
【1】廖景娱.金属构件失效分析[M].北京: 化学工业出版社, 2003: 17.
【2】高宗仁.中外钢号速查手册[M].太原: 山西科学技术出版社, 2008: 393.
【3】李炯辉.金属材料金相图谱[M].北京: 机械工业出版社, 2006: 459.
【4】司卫华, 王学武.金属材料与热处理 [M].北京: 化学工业出版社, 2008: 78.
【2】高宗仁.中外钢号速查手册[M].太原: 山西科学技术出版社, 2008: 393.
【3】李炯辉.金属材料金相图谱[M].北京: 机械工业出版社, 2006: 459.
【4】司卫华, 王学武.金属材料与热处理 [M].北京: 化学工业出版社, 2008: 78.
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