| 大型调质输入轴开裂分析 |
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| 引用本文： | 程里,刘庆兰,王春莉.大型调质输入轴开裂分析[J].理化检验(物理分册),2010(10):668-671,676. |
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| 作者姓名： | 程里 刘庆兰 王春莉 |
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| 作者单位： | [1]重庆理工大学材料科学与工程学院,重庆400050 [2]重庆齿轮箱责任有限公司,重庆402263 |
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| 摘 要： | 某大型调质输入轴放置约9个月后开裂,采用宏观分析、化学成分分析、低倍检验、断口分析、金相检验以及力学性能测试等手段对输入轴开裂原因进行了分析。结果表明:该输入轴为在组织应力及氢析出所造成内应力共同作用下的氢致延迟开裂;输入轴原材料氢含量高、偏析严重、非金属夹杂物含量高以及锻造不充分,引起零件内部发生了氢气积聚,形成了较大的内应力,这是导致输入轴发生氢致延迟开裂的主要原因。
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| 关 键 词： | 大型调质输入轴 氢致延迟开裂 原材料 锻造 |
Cracking Analysis of Heave-duty Thermal Refined Input Gear Axles |
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| CHENG Li,LIU Qing-lan,WANG Chun-li.Cracking Analysis of Heave-duty Thermal Refined Input Gear Axles[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2010(10):668-671,676. |
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| Authors: | CHENG Li LIU Qing-lan WANG Chun-li |
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| Affiliation: | 1.College of Materials Science and Engineering,Chongqing University of Technology,Chonqing 400050,China;2.Chongqing Gearbox Co.,Ltd.,Chongqing 402263,China) |
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| Abstract: | Cracking was found in a heave-duty thermal refined input gear axle after 9 months storage period.Analysis was performed on the cracking zone by chemical compositions analysis,macroscopical and microscopical examination,fracture analysis and mechanical properties testing to find the cracking reason of the input gear axle.The results show that the input gear axle failure resulted from hydrogen induced cracking.The main reason for the cracking was high hydrogen content,serious segregation and many nonmetallic inclusions in the raw material,and insufficient forging,which made large interior stress form and hydrogen gather in the input gear axle,and hydrogen induced cracking happen finally. |
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| Keywords: | heave-duty thermal refined input gear axle hydrogen induced cracking raw material forging |
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