中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 10 No. 6 December 2000 |
coating with ion nitriding as interlayer on hot work die steel①
（1. State Key Laboratory of Die Technology, Huazhong University of Science and Technology,Wuhan 430074, P.R.China;
2. Department of Materials Science and Engineering, Zhejiang University,
Hangzhou 310027, P.R.China）
Abstract:High temperature sliding wear behaviors of ion plating TiN composite coating with ion nitriding interlayer on 3Cr2W8V hot work die steel substrate during 500~700℃were investigated. Phase structure was analyzed by XRD and adhesion strength of TiN coating was measured by scratch test. The worn morphologies and wear mechanism of TiN composite coating were observed and analyzed by using SEM. The results showed that both adhesion strength and hardness of TiN composite coating with ion nitriding interlayer are higher than those of single TiN coating. Ion nitriding interlayer provides a stronger support for TiN coating. With increasing temperature, the wear rates and friction coefficient of all tested coatings increase. The wear resistance of TiN composite coating is better than that of single TiN coating. The wear mechanisms of TiN composite coating are mainly adhesion-transfer wear and abrasive wear. The adhesion-transfer wear becomes more severe as the test temperature increases.
Key words: TiN; composite coating; interlayer; high temperature wear
