中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 26 No. 10 October 2016 |
（1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;
2. Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education,
Harbin Engineering University, Harbin 150001, China）
Abstract:An integrated low-temperature nitriding process was carried out for Ti6Al4V to investigate its effect on microstructure and properties. The process was designed to enhance the nitriding kinetics in low-temperature (500 °C) nitriding by deformation, and to strengthen Ti6Al4V alloy by dispersion at the same time. Specimens of Ti6Al4V alloy were treated through the process of solid solution strengthening-cold deformation-nitriding at 500 °C. The white nitriding layer is formed after some time and then kept stable, changing little with the deformation degree and time. The effect of aging on substrate is significant. Surface hardness and substrate hardness increase with deformation increasing. The construction was investigated by XRD. The surface nitrides are TiN, Ti2N, Ti4N3-X and Ti3N1.29, and the nitrides in cross-section are Ti3N1.29 and TiN0.3. The wear tests of specimens after nitriding, aging and deformation were carried out, and the test data show that the nitrided pieces have the best wear resistance.
Key words: Ti6Al4V; low temperature nitriding; cold deformation; wear resistance
