真空熔覆WC颗粒增强镍基合金涂层的组织与性能
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摘要
为了提高45钢表面的耐磨性能和耐腐蚀性能,研究WC含量对镍基合金涂层组织及性能的影响规律,通过真空熔覆技术,在45钢表面制备不同WC含量的镍基合金涂层,利用一系列检测手段分析了WC颗粒增强镍基合金涂层的显微形貌、元素分布、物相、显微硬度、耐磨性能和耐腐蚀性能。结果表明:不同WC含量下制备的真空熔覆试样均形成了良好的冶金结合,物相主要由WC、W_2C、Ni_(2.9)Cr_(0.7)Fe_(0.36)、FeNi、M_7C_3等组成;当WC含量为30%时,涂层的平均显微硬度最大且耐磨性能最好,最大显微硬度达到1 225 HV_(2.5 N),相同条件下熔覆层磨损量仅为母材的16%;随着WC含量增加,涂层的耐腐蚀性能降低,但不同WC含量的涂层耐腐蚀性能均较母材提高了9倍以上。
In order to improve the wear resistance and corrosion resistance of 45 steel surface,and study the influence of WC content on the microstructure and properties of Ni-based alloy coating,nickel-based alloy coatings with different WC contents were prepared on 45 steel surface by vacuum cladding technology.A series of testing methods were used to explore the microstructure,element distribution,phase composition,microhardness,wear resistance and corrosion resistance.Results showed that the vacuum cladding samples prepared under different WC contents all presented a good metallurgical bond strength.The phase mainly consisted of WC,W_2C,Ni_(2.9)Cr_(0.7)Fe_(0.36),Fe Ni,M_7C_3.When the WC content was 30%,the coating had the highest average microhardness and the best wear resistance,and the maximum microhardness reached 1 225 HV_(2.5 N),as well as the wear mass loss was only 16%of that of the base metal.With the increase of WC content,the corrosion resistance of the coating reduced.Besides,the corrosion resistance of all the coatings with different WC contents was more than 9times higher than that of the base metal.
In order to improve the wear resistance and corrosion resistance of 45 steel surface,and study the influence of WC content on the microstructure and properties of Ni-based alloy coating,nickel-based alloy coatings with different WC contents were prepared on 45 steel surface by vacuum cladding technology.A series of testing methods were used to explore the microstructure,element distribution,phase composition,microhardness,wear resistance and corrosion resistance.Results showed that the vacuum cladding samples prepared under different WC contents all presented a good metallurgical bond strength.The phase mainly consisted of WC,W_2C,Ni_(2.9)Cr_(0.7)Fe_(0.36),Fe Ni,M_7C_3.When the WC content was 30%,the coating had the highest average microhardness and the best wear resistance,and the maximum microhardness reached 1 225 HV_(2.5 N),as well as the wear mass loss was only 16%of that of the base metal.With the increase of WC content,the corrosion resistance of the coating reduced.Besides,the corrosion resistance of all the coatings with different WC contents was more than 9times higher than that of the base metal.
引文
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[2] TONG W P,ZHANG H W,TAO N R,et al. Low-Temperature Nitriding by Means of SMAT[J]. Journal of Materials Heat Treatment,2004,25(5):301-306.
[3]陈树旺,程焕武,陈卫东.渗硼技术的研究应用发展[J].国外金属热处理,2003,24(5):8-12.
[4]宋建丽,李永堂,邓琦林,等.激光熔覆成形技术的研究进展[J].机械工程学报,2010,46(14):29-39.
[5]邓德伟,陈蕊,张洪潮.等离子堆焊技术的现状及发展趋势[J].机械工程学报,2013,49(7):106-112.
[6]孙焕.高频感应真空熔覆涂层的性能研究[D].青岛:青岛理工大学,2014:24-32.
[7]曾凡检. Ni60合金真空烧结熔覆涂层的组织和性能[D].湘潭:湘潭大学,2016:28-51.
[8]慈文亮.高频感应真空熔覆镍基合金-WC复合涂层的性能研究[D].青岛:青岛理工大学,2013:39-51.
[9]肖逸锋,曾凡检,匡雯慧,等.真空烧结熔覆Ni60涂层的组织和性能[J].金属热处理,2017,42(7):83-87.
[10] DUWELL E J. Molecular-Orbual Model for Metal-Sapphire Interfacial Strength[J]. J Appl Phys,1982,53(10):6 634-6 637.
[11] BONNY K,DE BAETS P,VLEUGELS J,et al. Dry Reciprocating Sliding Friction and Wear Response of WC-Ni Cemented Carbides[J]. Tribol Lett,2008,31(3):199-209.
[12]黄新波.真空熔覆Ni基合金-碳化钨和Co基合金-碳化钨复合涂层的制备及性能研究[D].西安:西安电子科技大学,2005:64-74.
[13]向波,谢志刚.金刚石制品用Fe-Co-Cu预合金粉末的制备及其粒度控制[J].粉末冶金材料科学与工程,2007,12(2):123-128.