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| Rupture Failure Behavior of Leaf Spring |
| Received:November 25, 2017 Revised:April 15, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.04.015 |
| KeyWord:leaf spring failure corrosion fatigue fracture |
| Author | Institution |
| FU Yang-fan |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| WANG Chang-peng |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| CHEN Da-jun |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| MEI Hua-sheng |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| LI Zhong-sheng |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| ZHANG Jing-yuan |
Southwest Technology and Engineering Research Institute, Chongqing , China |
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| Abstract: |
| Objective To research causes for failure of leaf spring. Methods The failure behavior of leaf spring was analyzed through chemical component test, fracture morphology analysis, microstructure analysis, etc. Results The fatigue strength and corrosion resistance of the leaf spring declined due to deep surface decarburization. Meanwhile, corrosive conditions lead to the corrosion defects on the surface. Under action of cyclic force, early crack appeared and extended in corrosion defects on the surface, resulting in corrosion fatigue fracture. Conclusion Methods such as adjusting the temperature of thermal treatment, increasing machining allowance, removing decarburized layer, shot peening treatment on surface, etc. could improve the corrosion resistance and anti-fatigue performance on surface of leaf spring and effectively avoid corrosion fatigue fracture of the leaf spring. |
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