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Cause analysis of longitudinal cracking of extrusion cylinder lining |
WANG Xia, JING Zhilong |
TZ(Tianjin) Binhai Heavy Machinery Co., Ltd., Tianjin 300460, China |
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Abstract The extrusion cylinder assembly consists of two parts, including the shell and the inner lining. An extrusion cylinder assembly was in service for about 11 months. The problem of serious aluminizing was observed in the extrusion process. The inspection showed that there was a crack with length of 1 000 mm in the inner lining. In order to determine the property and reason of cracking on extrusion cylinder lining, the macroscopic analysis, chemical composition detection, electron microscope fracture analysis and metallographic examination with high and low magnification were performed to analyze the causes. The results showed that the main causes of the longitudinal cracking on the inner lining was the nonuniform distribution of material composition, serious segregation, insufficient strength, low ductility and high friability. The continuity of base material was destroyed by the cracks on inner surface during quenching. The material could no longer meet the use requirement and cracking due to fragility occurred.
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Received: 22 February 2022
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[1] |
李维鉞. 中外钢铁牌号速查手册[M]. 北京:机械工业出版社,2007.
|
[2] |
中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会. GB/T 1299—2014 工模具钢[S]. 北京:中国标准出版社,2015.
|
[3] |
王孝东,余宏伟,张开广,等. 厚规格调质高强度船板心部冲击不合格原因分析[J]. 物理测试,2021,39(3):48.
|
[4] |
刘金源. 挖掘机油缸活塞矫直断裂原因分析[J]. 物理测试,2016,34(1):1.
|
[5] |
李炯辉,林德成. 金属材料金相图谱[M]. 北京:机械工业出版社,2006.
|
[6] |
张栋,钟培道,陶春虎,等. 失效分析[M]. 北京:国防工业出版社,2005.
|
[7] |
刘岩,张聪毅,潘恒沛,等. 某轴承外圈滚道裂纹分析[J]. 物理测试,2021,39(6):44.
|
[8] |
郑凯,钟振前,林双平,等. 某柴油发动机连杆断裂失效分析[J]. 物理测试,2021,39(6):11.
|
[9] |
郭海霞,张金民,张欣耀. 连接体的接头断裂原因分析[J]. 物理测试,2021,39(3):43.
|
[10] |
崔约贤,王长利. 金属断口分析[M]. 哈尔滨:哈尔滨工业大学出版社,1998.
|
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