钛合金表面半导体激光气体氮化涂层的性能研究

发布时间：2018-12-16 23:48

【摘要】：目的提升钛合金(TC4)叶片表面性能,解决失效问题。方法实验采用激光局部气体氮化工艺代替传统氮化工艺,利用2 k W柔性光纤耦合半导体激光器在钛合金(TC4)基体表面采用气体氮化的方法制备TiN表面改性层。采用摩擦磨损试验机和改制的汽蚀装置分别测试了氮化层与基体(TC4)的耐磨性与抗汽蚀性能。结果摩擦磨损实验后,激光氮化层的质量损失为2.3 mg,基体TC4的质量损失为20.2 mg,激光氮化层的损失质量为基体TC4的11.3%,激光氮化层抗磨损性能相较基体TC4提高了7倍。TC4基体汽蚀损失的质量为4.08 mg,而氮化层的质量损失为1.13 mg,氮化层的抗汽蚀性能比基体提高了2.61倍。结论采用半导体激光气体氮化钛合金叶片能够得到分布着大量TiN枝晶的氮化层,提高表面耐磨损性能,氮化层中的TiN枝晶构成的网篮状组织对其表面抗汽蚀性能也有所提高。
[Abstract]:Objective to improve the surface properties of titanium alloy (TC4) blades and solve the failure problem. Methods the laser partial gas nitridation process was used to replace the traditional nitriding process. The surface modification layer of TiN was prepared by gas nitriding on the substrate of titanium alloy (TC4) using a 2 kW flexible fiber coupled semiconductor laser. The wear resistance and cavitation corrosion resistance of nitride layer and substrate (TC4) were measured by friction and wear tester and modified cavitation device respectively. Results after friction and wear experiments, the mass loss of laser nitrided layer was 2.3 mg, substrate TC4 loss was 20.2 mg, laser nitrided layer mass loss was 11.3% of substrate TC4. The wear resistance of the laser nitrided layer is 7 times higher than that of the substrate TC4. The mass loss of the TC4 matrix is 4.08 mg, and the mass loss of the nitride layer is 1.13 mg,. The cavitation corrosion resistance of the nitrided layer is 2.61 times higher than that of the substrate. Conclusion A large number of nitride layers with TiN dendrites can be obtained by using semiconductor laser gas titanium nitride alloy blades to improve the wear resistance of the surface, and the surface cavitation corrosion resistance of the TiN dendrites in the nitride layer is also improved.
【作者单位】：中原工学院机电学院;博雷(中国)控制系统有限公司;浙江工业大学激光先进制造研究院;浙江省高端激光制造装备协同创新中心;浙江大学现代制造工程研究所;
【基金】：郑州市科技计划项目(20150483) 河南省高等学校重点科研项目(15A460038) 中国纺织工业联合会科技指导性项目计划(2016085)~~
【分类号】：TG178

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