【摘要】：為提高火炮身管的磨損、腐蝕和燒蝕性能,在炮鋼表面進(jìn)行熔鹽鍍鉭正交試驗。采用極差分析法研究時間、溫度、電流密度和鍍件粗糙度對鍍層厚度的影響,并對鍍鉭的工藝參數(shù)進(jìn)行優(yōu)化。利用硬度儀、X射線衍射儀(XRD)、掃描電鏡(SEM)和能譜儀(EDS)等分析技術(shù)對鉭鍍層硬度、物相、微觀形貌以及化學(xué)成分進(jìn)行了表征;模擬身管內(nèi)磨損、燒蝕與腐蝕3種工況,分別利用高溫摩擦磨損試驗機(HT1000)、脈沖激光(YAG-M50)和綜合電化學(xué)測試方法對鉭鍍層與鉻鍍層耐磨損性能、耐燒蝕性和耐腐蝕性能進(jìn)行對比研究。結(jié)果表明:在750℃,0.08A/cm2時可獲結(jié)晶度不高的硬鉭鍍層,退火后得到α相鉭,硬度下降;表面耐磨性增加,摩擦因數(shù)與磨損量較鉻鍍層分別降低33.3%與55.6%;腐蝕電位相對于鉻鍍層正移了365mV,大幅提高了其耐蝕性能;脈沖激光測試結(jié)果也表明耐燒蝕性能有所提高。
[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，

本文編號：2172524