激光功率对TC4熔覆层组织与耐磨性能的影响

发布时间：2018-04-06 05:42

本文选题：激光功率　切入点：TC　出处：《热加工工艺》2017年20期

【摘要】：研究了激光功率对TC4钛合金熔覆层组织与抗摩擦磨损性能的影响。结果表明,激光功率对熔覆层的组织、显微硬度、抗摩擦磨损性能有一定影响,但对元素分布没有影响。熔覆层比基体具有更好的抗氧化性和更高的显微硬度,但抗摩擦磨损性能下降。当激光功率为2500 W时,熔覆层最窄,呈不规则波浪状,结合区域附近有孔隙,整体效果较差。当激光功率为2750 W时,结合区域附近有少量单独气泡,但熔覆层的平均显微硬度最高。当激光功率为3000W时,熔覆层整体形貌和组织的质量最好,熔覆层与基体结合紧密,没有熔渣或孔隙,形成了性能良好的冶金结合,并且熔覆层的抗摩擦磨损性能最接近基体。
[Abstract]:The effect of laser power on the microstructure and friction and wear resistance of TC4 titanium alloy cladding was investigated.The results show that laser power has a certain effect on the microstructure, microhardness, friction and wear resistance of the cladding, but has no effect on the distribution of elements.The cladding coating has better oxidation resistance and higher microhardness than the substrate, but the friction and wear resistance of the cladding layer is decreased.When the laser power is 2500 W, the cladding layer is the narrowest, with irregular wave shape and pores near the binding area, so the overall effect is poor.When the laser power is 2750 W, there are a few individual bubbles near the bonding zone, but the average microhardness of the cladding coating is the highest.When the laser power is 3000W, the overall morphology and microstructure of the cladding layer are the best. The cladding layer is closely bound to the substrate, and no slag or pore is formed. The metallurgical bonding of the cladding layer is good, and the friction and wear resistance of the cladding coating is the closest to that of the matrix.
【作者单位】：中国民航大学航空工程学院;中国民航大学中欧航空工程师学院;中国民航大学电子信息与自动化学院;天津工业大学激光技术研究所;
【基金】：国家自然科学基金民航联合基金资助项目(U1333121) 工信部重大专项(2013ZX04001071) 天津市应用基础与前沿技术研究计划资助项目(青年项目)(14JCQNJC05000)
【分类号】：TG174.4

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