激光熔覆和活化屏等离子体氮化复合涂层组织与接触疲劳性能

• 作 者: 张晓东 董世运 徐滨士 王志坚 闫世兴 李庆芬
• 机 构: 哈尔滨工程大学材料科学与化学工程学院,装甲兵工程学院装备再制造技术国防科技重点实验室,
• 出 处: 中国激光
• 发表日期: 2011年06期
• 关键词: 疲劳性能 激光技术 激光熔覆 复合处理 等离子体 活化屏等离子体 接触疲劳 复合涂层 表面硬度 激光熔覆技术

激光熔覆技术可以对失效的齿类件进行再制造,但是随着机械动力装置性能的大幅度提高,对激光再制造后齿类件的性能要求也越来越高。为了进一步提高激光再制造后齿类件的性能,采用活化屏等离子体氮化处理技术对Fe314激光熔覆层进行了复合处理,重点研究了活化屏等离子体氮化复合处理对激光熔覆层的表面硬度和抗接触疲劳性能的影响。试验结果表明,复合处理后Fe314激光熔覆层的表面硬度由540 HV提高到927 HV,Fe314激光熔覆层的接触疲劳寿命由2.42×105提高到4.94×105,复合处理后显著提高了Fe314激光层的表面硬度和接触疲劳性能。

Laser cladding can rework failed gear parts, but with the dramatic increase in the performance of mechanical power units, the performance requirements for tooth parts after laser remanufacturing are also getting higher and higher. In order to further improve the performance of the dental parts after laser remanufacturing, the laser cladding layer of Fe314 was treated by the activation plasma nitriding technology. The effects of the activation plasma nitriding on the laser cladding layer Surface hardness and contact fatigue resistance. The experimental results show that the surface hardness of Fe314 laser cladding increases from 540 HV to 927 HV ​​and the contact fatigue life of Fe314 laser cladding increases from 2.42 × 105 to 4.94 × 105 after composite treatment, Layer surface hardness and contact fatigue properties.