Yao Yumei * Zhang Yuhong Li Heng Xing Feng.Research on laser cladding of nickel based coatings on TC4 titanium alloy surface and its microstructure & properties based on PLC control[J].Plating & Finishing,2024,(11):1-8.
TC4钛合金表面激光熔覆工艺的PLC控制与组织性能研究
- Title:
- Research on laser cladding of nickel based coatings on TC4 titanium alloy surface and its microstructure & properties based on PLC control
- Keywords:
- laser cladding ; nickel based coating ; laser power ; hardness ; wear resistance ; corrosion resistance
- 分类号:
- TG174.4
- 文献标志码:
- A
- 摘要:
- 为了提升钛合金的表面耐磨性和耐蚀性，基于可编程逻辑控制器（ PLC ）控制激光工艺参数在 TC4 钛合金表面制备了镍基涂层，研究了激光功率对涂层形貌、物相组成、硬度、耐磨性和耐蚀性的影响。结果表明，激光功率为 1100 W 和 2300 W 时熔覆涂层中存在裂纹、孔隙缺陷，在激光功率为 1400 W~2000 W 时激光熔覆涂层质量较好。不同激光功率下激光熔覆涂层均主要由 α -Ti 、 TiNi 、 Ti 2 Ni 、 TiB 2 、 TiC 和 Ce 2 O 3 相组成，激光功率的变化不会改变激光熔覆涂层的物相组成。激光熔覆涂层的显微硬度（ 935.61 HV~1064.29 HV ）都高于基体（ 303.24 HV ），磨损率都明显小于基体材料；当激光功率从 1100 W 增加至 2300 W 时，激光熔覆涂层的显微硬度先增后减、磨损率先减后增，显微硬度最大值（ 1064.29 HV ）和磨损率最小值（ 0.38×10 -5 mm 3 ·N -1 ·m -1 ）在激光功率为 2000 W 时获得。极化曲线和电化学阻抗谱的测试结果相吻合，证明激光熔覆涂层的耐蚀性都优于基体，且耐蚀性会随着激光功率增加先增大后减小，激光功率为 2000 W 时涂层耐蚀性最好。
- Abstract:
- ： In order to improve the surface wear resistance and corrosion resistance of titanium alloy ， a nickel based coating was prepared on TC4 titanium alloy surface using programmable logic controller （ PLC ） controlled laser process parameters. The effect of laser power on coating morphology ， phase composition ， hardness ， wear resistance and corrosion resistance was studied. The results indicate that there are cracks and pore defects in the cladding coating when the laser power is 1100 W and 2300 W ， and the forming quality of the laser cladding coating is better when the laser power is between 1400 W and 2000 W. The laser cladding coatings under different laser powers are mainly composed of α -Ti ， TiNi ， Ti 2 Ni ， TiB 2 ， TiC ， and Ce 2 O 3 ， the phase composition does not change with changes in laser power. The microhardness of the laser cladding coating （ 935.61 HV?1064.29 HV ） is higher than that of the substrate （ 303.24 HV ）， and the wear rate is significantly lower than that of the substrate material ； When the laser power increases from 1100 W to 2300 W ， the microhardness of the laser cladding coating first increases and then decreases ， and the wear first decreases and then increases. The maximum microhardness （ 1064.29 HV ） and the minimum wear rate （ 0.38×10 -5 mm 3 ·N -1 ·m -1 ） are obtained at a laser power of 2000 W. The polarization curve and electrochemical impedance spectroscopy test results are consistent ， indicating that the corrosion resistance of the laser cladding coating is better than that of the substrate ， and the corrosion resistance first increases and then decreases with the increase of laser power. The coating has the best corrosion resistance when the laser power is 2000 W.
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备注/Memo
收稿日期： 2024-04-05 修回日期： 2024-04-18 作者简介： 姚玉梅（ 1983 ─ ），女，硕士，讲师，研究方向：机电设备控制技术， email ： 153203072@qq.com 基金项目： 河南省科技攻关计划项目（ 222102210416 ）； 河南省自然科学基金项目（ 411063117 ） TC4 钛合金表面激光熔覆工艺的 PLC 控制与组织性能研究 姚玉梅 1* ，张育红 2 ，李 恒 3 ，邢 峰 3