文献类型：期刊文献

中文题名：Ni/MoS_(2)含量对TC4钛合金表面激光熔覆Ni60涂层成形及性能的影响

英文题名：Effect of Ni/MoS_(2) Content on the Forming and Properties of Laser Cladding Ni60 Coating on TC4 Titanium Alloy Surface

作者：陈熙淼[1];师文庆[1];王杉杉[1];程才[1];吴腾[1];朱志凯[1]

机构：[1]广东海洋大学电子与信息工程学院,广东湛江524088

年份：2024

卷号：44

期号：12

起止页码：46

中文期刊名：应用激光

外文期刊名：Applied Laser

收录：北大核心2023、、CSCD_E2023_2024、北大核心、CSCD

基金：国家自然科学基金资助项目(62073089);广东省普通高校重点领域专项项目(2020ZDZX2061);Guangdong Postgraduate Education Innovation Project研究生联合培养基地项目;广东省大学生科技创新培育专项资金资助项目(pdjh2023a0242)。

语种：中文

中文关键词：激光熔覆;复合涂层;显微硬度;摩擦系数;TC4钛合金

外文关键词：slasercladding;compositecoating;microhardness;coefficient of friction;TC4 titanium alloy

中文摘要：为解决TC4钛合金耐磨性能差、摩擦系数大、摩削加工性能不好且硬度较差的问题,有效提高其适用范围,采用不同比例的Ni60粉末和Ni/MoS_(2)粉末在TC4基材表面制备复合涂层,通过对涂层形貌分析、显微硬度与减摩性能测试,分别表征添加粉末比例不同时对涂层成形质量的影响。实验发现所制备复合涂层的宏观形貌成形良好,但其截面形貌随着Ni/MoS_(2)含量的增加,熔覆层与基材交界处由平缓过渡为凸起,并且出现气孔和裂纹等缺陷。涂层显微硬度与Ni/MoS_(2)添加量呈正相关性,摩擦系数随Ni/MoS_(2)添加量的增加呈先下降后上升的趋势。综合比较下,当添加粉末中Ni/MoS_(2)质量分数为0.2时可获得性能更为优异的复合涂层,所得涂层显微硬度为TC4基材的2.8倍,达到了950~1000 HV,且该涂层摩擦系数降低到TC4基材摩擦系数的1/3。结果表明,所述实验方案及其结果可在实际应用中解决TC4钛合金硬度低、耐磨性较差等问题。

外文摘要：To address the challenges related to poor wear resistance,high friction coefficient,inadequate grinding performance,and low hardness of TC4 titanium alloy,this study aims to enhance its applicability.Composite coatings were fabricated on TC4 substrate using varying proportions of Ni60 powder and Ni/MoS_(2) powder.The impact of different powder ratios on coating quality was assessed through analyses of coating morphology,microhardness,and friction reduction performance.Experiments show that the macroscopic morphology of the prepared composite coating is well formed,but its cross-sectional morphology changes from gentle to excessive to convex at the junction of the cladding layer and the substrate with the increase of Ni/MoS_(2) content,and defects such as porosity and cracks appear.Coating microhardness and Ni/MoS_(2) addition is positive correlation,friction coefficient and Ni/MoS_(2) addition of the first decline and then rise trend,comprehensive comparison,when the addition of Ni/MoS_(2) mass fraction of 0.2 can obtain a more excellent composite coating,the microhardness of the coating can reach 950-1000 HV,about 2.8 times the TC4 substrate,and the coating friction coefficient is reduced to 1/3 of the friction coefficient of TC4 substrate.These findings demonstrate that the proposed experimental approach effectively mitigates the low hardness and poor wear resistance issues of TC4 titanium alloy in practical applications.