| TIAN Feng,YANG Hui.Experimental Study on Wear Behavior of Nano-crystallization Surface of 40 Cr[J],42(5):52-54 |
| Experimental Study on Wear Behavior of Nano-crystallization Surface of 40 Cr |
| Received:May 19, 2013 Revised:June 15, 2013 |
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| DOI： |
| KeyWord:40 Cr steel HESP surface nano-crystallization wear-resisting property |
| Author | Institution |
| TIAN Feng |
School of Mechanical and Electrical Engineering,Henan Institute of Science and Technology, Xinxiang , China |
| YANG Hui |
School of Mechanical and Electrical Engineering,Henan Institute of Science and Technology, Xinxiang , China |
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| Abstract: |
| High Energy Shot Peening ( HESP) was used to treat the material surface in order to study the effects of nano-crystallization surface of 40 Cr on wear behavior. The nano-crystalline layer was obtained on surface. Micro-structure after HESP was analyzed, residual stress and micro-hardness after nano-crystallization were measured. Wear behaviors of nano-crystalline surface were examined as well . The experiment results show that, HESP causes severe plastic deformation on surface, and the micro-hardness increases by 68 % compared to matrix. There exits compressive residual stress with large magnitude on surface, and the maximum value is-736 MPa, meanwhile, the compressive residual stress layer come up to 0 . 9 mm. The frictional wear experiments show that, HESP nano-crystallization can apparently decrease friction factor, and the wear loss is less than 1 / 5 of untreated samples, HESP largely improved the wear-resisting property of 40 Cr. |
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