熔盐电镀钽及其耐磨损烧蚀性能

发布时间：2018-08-08 17:38

【摘要】：为提高火炮身管的磨损、腐蚀和烧蚀性能,在炮钢表面进行熔盐镀钽正交试验。采用极差分析法研究时间、温度、电流密度和镀件粗糙度对镀层厚度的影响,并对镀钽的工艺参数进行优化。利用硬度仪、X射线衍射仪(XRD)、扫描电镜(SEM)和能谱仪(EDS)等分析技术对钽镀层硬度、物相、微观形貌以及化学成分进行了表征;模拟身管内磨损、烧蚀与腐蚀3种工况,分别利用高温摩擦磨损试验机(HT1000)、脉冲激光(YAG-M50)和综合电化学测试方法对钽镀层与铬镀层耐磨损性能、耐烧蚀性和耐腐蚀性能进行对比研究。结果表明:在750℃,0.08A/cm2时可获结晶度不高的硬钽镀层,退火后得到α相钽,硬度下降;表面耐磨性增加,摩擦因数与磨损量较铬镀层分别降低33.3%与55.6%;腐蚀电位相对于铬镀层正移了365mV,大幅提高了其耐蚀性能;脉冲激光测试结果也表明耐烧蚀性能有所提高。
[Abstract]:In order to improve the wear, corrosion and ablation performance of gun barrel, the orthogonal experiment of molten salt tantalum plating was carried out on the surface of gun steel. The effects of time, temperature, current density and roughness on the coating thickness were studied by means of range analysis, and the process parameters of tantalum plating were optimized. The hardness, phase, microstructure and chemical composition of tantalum coating were characterized by (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), and the wear, ablation and corrosion of tantalum coating were simulated. The wear resistance, ablation resistance and corrosion resistance of tantalum coating and chromium coating were studied by high temperature friction and wear tester (HT1000), pulsed laser (YAG-M50) and comprehensive electrochemical test method. The results show that the hard tantalum coating with low crystallinity can be obtained at 750 鈩，

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