热处理对Fe基非晶涂层耐磨及耐腐蚀性能的影响

来源期刊:中国有色金属学报优先出版20210825

论文作者:王海博 李春燕 王顺平 李金玲 寇生中

文章页码:263 - 272

关键词:非晶涂层;热处理;磨损性能;腐蚀性能

Key words:amorphous coating; heat-treated; wear resistance; corrosion resistance

摘    要:采用超音速火焰喷涂(HVOF)制备了(Fe0.5Ni0.2)61Cr9Co6Si1.5B17.5Nb5非晶涂层,探究了不同热处理温度和时间对非晶涂层的磨损性能和腐蚀性能的影响。利用X射线衍射仪(XRD)、同步热分析仪(DSC)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、高速往复摩擦磨损试验机、电化学工作站等仪器对组织结构及相应的性能进行检测。结果表明,随着热处理温度和时间的增加,涂层仍保持非晶态,涂层孔隙率降低,涂层表面氧化磨损和剥层磨损减轻,磨痕表面更加平整;在人工海水溶液中有更宽的钝化区间和低的钝化电流密度(Jpass),热处理后的非晶涂层耐磨、耐腐性能得到改善提升。当涂层在480 ℃热处理1110 min时,涂层出现FeNi3纳米晶体相,涂层有最低孔隙率为0.6%,磨损率为1.6×10-5 mm3/(N·m),且涂层有最低的自腐蚀电流密度(Jcorr) 4.591×10-8 A/cm2

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 for the structure, wear and corrosion properties were explored. The structure corresponding property was analyzed by X-ray diffractometer (XRD), differential scanning calorimetry (DSC), transmission electron microscope (TEM), scanning electron microscope (SEM), wear test machine, electrochemical workstation etc. The results show that with the heat-treated temperatures increasing, the coatings remain amorphous structure, the porosity of the coatings decrease, the oxidation wear and delamination wear of the coatings surface reduce, and the wear scar surface of coatings smooth. 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 have been improved. The FeNi3 nanocrystalline phase appears in the amorphous coating with heat-treated temperature of 480 ℃ for 1110 min. The coating has the lowest porosity of 0.6%, wear rate of 1.6×10-5 mm 3 /(N·m), and the lowest self-corroding current density (Jcorr) of 4.591×10-8 A/cm2.

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号