| WANG Yong-guang,CHEN Yao,LU Xiao-long,ZHANG Hua.Tribological Properties of Plasma Nitriding and CrN Coating on 40Cr Steel with High Load at Low Speed[J],47(2):71-76 |
| Tribological Properties of Plasma Nitriding and CrN Coating on 40Cr Steel with High Load at Low Speed |
| Received:August 07, 2017 Revised:February 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.02.012 |
| KeyWord:40Cr steel gear CrN coating high load friction and wear |
| Author | Institution |
| WANG Yong-guang |
School of Mechanical and Electric Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou , China |
| CHEN Yao |
School of Mechanical and Electric Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou , China |
| LU Xiao-long |
School of Mechanical and Electric Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou , China |
| ZHANG Hua |
Wuxi Jiangnan Rubber Plastics Machinery Co. Ltd, Yixing , China |
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| Abstract: |
| The work aims to improve tribological properties of 40Cr gear with high load at low speed. Nitrided layer and CrN coating were prepared on 40Cr steel substrate by plasma nitriding and arc-evaporation deposition (AED). Phase composition, morphology and tribological properties of 40Cr steel receiving different surface treatments were investigated with X-ray diffractometer (XRD), scanning electron microscopy (SEM), energy dispersive spectrum (EDS) and reciprocating friction and wear tester. Thickness and microhardness of the nitrided layer was 10 μm and 558HV, respectively. The thickness and microhardness of the CrN coating was 4 μm and 1341HV, respectively. Wear rate of the 40Cr steel was 104.17×10-6 mm3/(N•m) under the load of 60 N, and the wear mechanism was mainly slight adhesive wear and abrasive wear; the wear rate of the CrN coating on 40Cr steel was 17.36×10-6 mm3/(N•m) under the load of 60 N, and the wear mechanism was mainly slight abrasive wear. The 40Cr steel exhibits the best anti-wear and anti-friction properties under the normal load of 20~60 N after CrN coating is prepared. |
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