| 50CrVA扭杆断裂原因分析 |
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| 引用本文： | 刘昆鹏,有移亮,张珊,张峥. 50CrVA扭杆断裂原因分析[J]. 材料工程, 2010, 0(8) |
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| 作者姓名： | 刘昆鹏 有移亮 张珊 张峥 |
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| 作者单位： | 北京航空航天大学材料科学与工程学院; |
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| 摘 要： | 对断裂的50CrVA扭杆进行断口宏微观观察、金相组织检查、硬度测试及疲劳强度校核.疲劳强度校核结果说明扭转载荷过大是扭杆疲劳断裂的主要原因.材质分析显示扭杆中含有大尺寸富Zn夹杂物,它促进了疲劳裂纹的萌生,缩短了扭杆的疲劳寿命.
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| 关 键 词： | 50CrVA 疲劳断裂 扭杆 夹杂物 |
Fracture Analysis of 50CrVA Torsion Bar |
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| LIU Kun-peng,YOU Yi-liang,ZHANG Shan,ZHANG Zheng. Fracture Analysis of 50CrVA Torsion Bar[J]. Journal of Materials Engineering, 2010, 0(8) |
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| Authors: | LIU Kun-peng YOU Yi-liang ZHANG Shan ZHANG Zheng |
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| Affiliation: | LIU Kun-peng,YOU Yi-liang,ZHANG Shan,ZHANG Zheng (School of Materials Science and Engineering,Beihang University,Beijing 100191,China) |
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| Abstract: | The fracture reason of the fractured torsion bar of 50CrVA was analyzed by fracture surface observation,metallurgical structure observation,hardness test and fatigue strength checking.The result of fatigue strength checking showed that the fracture was mainly caused by higher torsion load.Large-dimension inclusions richly containing Zn in the torsion bar accelerated the crack initiation and shortened fatigue life of the torsion bar. |
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| Keywords: | 50CrVA fatigue fracture torsion bar inclusion |
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