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| Microstructure and Friction and Wear Properties of CrN/Cr Gradient Coating on Titanium Alloy Surface |
| Received:March 10, 2025 Revised:April 09, 2025 |
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| DOI：10.7643/issn.1672-9242.2025.04.001 |
| KeyWord:titanium alloy CrN/Cr gradient coating microstructure friction and wear friction coefficient mechanical property |
| Author | Institution |
| CHE Long |
College of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
| CHI Baicheng |
College of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
| GUO Cean |
College of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
| PAN Linlin |
College of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
| LU Xudong |
College of Equipment Engineering, Shenyang Ligong University, Shenyang , China |
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| Abstract: |
| The work aims to enhance the friction and wear properties of titanium alloy and prolong the service life of weapon and equipment components. The arc ion plating technology was used to prepare CrN/Cr gradient coating on the surface of titanium alloy, and the mechanical properties of titanium alloy and CrN/Cr gradient coating, as well as the friction and wear properties with copper as the friction pair were systematically studied. The elastic modulus and hardness of the CrN/Cr gradient coating reached 280.88 GPa and 16.98 GPa, about 2.19 times and 3.02 times higher than those of uncoated titanium alloy, respectively, and the H/E and H3/E2 values differed by 0.016 5 and 0.051 2 GPa, respectively. Under applied loads of 6 N and 10 N, the friction factors of titanium alloy and CrN/Cr gradient coating showed the similar trends, and the average friction factors were 0.16, 0.23 and 0.43, 0.49. Compared with the titanium alloy, the elastic modulus, hardness, and friction resistance of the CrN/Cr gradient coating are significantly improved. The friction factor of the CrN/Cr gradient coating under 6 N and 10 N loading conditions is higher than that of titanium alloy, but the wear volume is the opposite. The titanium alloy demonstrates a complex wear pattern comprising adhesive wear, abrasive wear, and oxidative wear, while the CrN/Cr gradient coating primarily shows adhesive wear and a small amount of oxidative wear. |
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