| 曲轴疲劳试样表面磁痕分析 |
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| 引用本文： | 杨永生. 曲轴疲劳试样表面磁痕分析[J]. 理化检验(物理分册), 2010, 0(7): 472-474 |
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| 作者姓名： | 杨永生 |
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| 作者单位： | 中国-拖集团有限公司工艺材料研究所,洛阳471004 |
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| 摘 要： | 采用宏观和微观检验等手段对曲轴疲劳试样不同部位磁痕产生的原因进行了分析。结果表明:磁痕是由于带状组织、疲劳裂纹和磨削裂纹等原因造成的。磨削裂纹主要是由于磨削时摩擦应力过大造成的。原材料中存在较严重的带状组织,导致淬火组织和残余应力不均匀,对磨削裂纹的产生起到了促进作用。
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| 关 键 词： | 曲轴 弯曲疲劳试样 磁痕 带状组织 疲劳裂纹 磨削裂纹 |
Analysis of Magnetic Traces on Crankshaft Fatigue Testing Specimen |
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| YANG Yong-sheng. Analysis of Magnetic Traces on Crankshaft Fatigue Testing Specimen[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2010, 0(7): 472-474 |
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| Authors: | YANG Yong-sheng |
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| Affiliation: | YANG Yong-sheng (Technology Material Research Institute, China Yituo Group Co. Ltd. , Luoyang 471004, China) |
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| Abstract: | The reason of the magnetic traces on the different part of crankshaft fatigue testing specimen had been analyzed by means of macroscopic and microscopic examination. The results showed that the magnetic traces were caused by the banded structure,fatigue crack and grinding crack.The grinding cracks were caused by the prodigious grinding stress.The banded structure was very serious in the raw material,causing the uneven distribution of the quenching structure and residual stress,which accelerated the initiation of grinding crack. |
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| Keywords: | crankshaft bending fatigue specimen magnetic traces banded structure fatigue crack grinding crack |
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