(1. 蘭州理工大學(xué) 省部共建有色金屬先進(jìn)加工與再利用國家重點(diǎn)實(shí)驗(yàn)室，蘭州 730000；
2. 蘭州理工大學(xué) 材料科學(xué)與工程學(xué)院，蘭州 730000)
摘 要: 采用超音速火焰噴涂(HVOF)制備了(Fe0.5Ni0.2)61Cr9Co6Si1.5B17.5Nb5非晶涂層，探究了不同熱處理溫度和時(shí)間對(duì)非晶涂層的磨損性能和腐蝕性能的影響。利用X射線衍射儀(XRD)、同步熱分析儀(DSC)、透射電子顯微鏡(TEM)、掃描電子顯微鏡(SEM)、高速往復(fù)摩擦磨損試驗(yàn)機(jī)、電化學(xué)工作站等儀器對(duì)涂層組織結(jié)構(gòu)及相應(yīng)的性能進(jìn)行檢測(cè)。結(jié)果表明：隨著熱處理溫度和時(shí)間的增加，涂層仍保持非晶態(tài)，涂層孔隙率降低，涂層表面氧化磨損和剝層磨損減輕，磨痕表面更加平整；在人工海水溶液中有更寬的鈍化區(qū)間和低的鈍化電流密度(Jpass)，熱處理后的非晶涂層耐磨、耐腐性能得到改善提升。在480 ℃保溫1110 min時(shí)，涂層出現(xiàn)FeNi3納米晶體相，涂層的最低孔隙率為0.6%，磨損率為1.6×10-5 mm3/(N？m)，且涂層具有最低的自腐蝕電流密度(Jcorr) 4.591×10-8 A/cm2。
關(guān)鍵字: 非晶涂層；熱處理；磨損性能；腐蝕性能
（1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730000, China;
2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730000, China）
Abstract:The amorphous coating with composition of (Fe0.5Ni0.2)61Cr9Co6Si1.5B17.5Nb5 was prepared by high velocity oxy fuel (HVOF), and the effects of different heat-treated temperatures and times on the structure, wear and corrosion properties were explored. The structure corresponding properties of coating were analyzed by X-ray diffractometer (XRD), differential scanning calorimetry (DSC), transmission electron microscope (TEM), scanning electron microscope (SEM), wear test machine and electrochemical workstation etc. The results show that with the heat-treated temperatures increasing, the coatings remain amorphous structure, the porosity of the coatings decreases, the oxidation wear and delamination wear of the coatings surface reduce, and the wear scar surface of coating is smoother. The heat-treated amorphous coatings exhibit a wider passive region and low passive current density (Jpass) in the artificial seawater solution, and the wear resistance and corrosion resistance of the amorphous coatings are improved. The FeNi3 nanocrystalline phase appears in the amorphous coating after heat-treatment at 480 ℃ for 1110 min. The coating has the lowest porosity of 0.6%, the wear rate of 1.6×10-5 mm3/(N？m), and the lowest self-corroding current density (Jcorr) of 4.591×10-8 A/cm2.
Key words: amorphous coating; heat-treatment; wear resistance; corrosion resistance
