混合稀土对化学镀Ni-P-Al_2O_3的影响
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摘要
采用化学复合镀技术在45~#钢基体上制备了Ni-P-Al_2O_3-Re镀层,并对化学镀之后的试样进行了热处理。研究了混合稀土的质量浓度和热处理温度对镀层性能的影响。结果表明:当混合稀土的质量浓度为20 mg/L时,镀层为非晶态结构,表面质量、显微硬度和耐蚀性均最好。镀层经400℃以上的热处理后完全转变为晶态结构,并且显微硬度和耐蚀性较热处理前有较大幅度的提高。经450℃热处理后的镀层,其表面的胞状晶粒分布最均匀,综合性能最好。
Ni-P-Al_2O_3-Re coatings were prepared on 45~# steel substrate by electroless composite plating, and the samples was heat treated after electroless plating. The influences of mass concentration of mixed rare earth and heat treatment temperature on the properties of the coatings were studied. The results showed that when the mass concentration of mixed rare earth was 20 mg/L, the coating was amorphous, and its surface quality, microhardness and corrosion resistance were best. The coating has been completely transformed into crystalline structure after heat treatment over 400 ℃, and the microhardness and corrosion resistance of the coating were greatly improved compared with that before heat treatment. The distribution of cellular grains on the surface of the coating after 450 ℃ heat treatment was the most uniform, and the comprehensive properties were the best.
Ni-P-Al_2O_3-Re coatings were prepared on 45~# steel substrate by electroless composite plating, and the samples was heat treated after electroless plating. The influences of mass concentration of mixed rare earth and heat treatment temperature on the properties of the coatings were studied. The results showed that when the mass concentration of mixed rare earth was 20 mg/L, the coating was amorphous, and its surface quality, microhardness and corrosion resistance were best. The coating has been completely transformed into crystalline structure after heat treatment over 400 ℃, and the microhardness and corrosion resistance of the coating were greatly improved compared with that before heat treatment. The distribution of cellular grains on the surface of the coating after 450 ℃ heat treatment was the most uniform, and the comprehensive properties were the best.
引文
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[2] 刘铁虎,王毅坚.氧化稀土对N-P化学镀层及其复合镀层耐磨性的影响[J].化工机械,1999,26(5):257-259.
[3] XIE R Z,ZHANG H Y,ZOU J J,et al.Effect of adding Lanthanum (La3+) on surface performance of Ni-P electroless plating coatings on RB400 support anchor rod steel[J].International journal of electrochemical science,2016,4(11):3269-3284.
[4] 冯贵层,张敬尧.稀土钇在化学镀镍-磷中的作用[J].电镀与环保,2014,34(2):29-31.
[5] 高加强,胡文彬.化学镀镍-磷镀层中磷含量的控制及性能研究[J].电镀与环保,2002,22(1):1-4.
[6] 徐瑞东,郭忠诚,朱晓云,等.高磷非晶态镍磷合金镀层的研究[J].电镀与环保,2002,22(3):18-20.
[7] 袁庆龙,曹晶晶.热处理温度对45钢化学镀Ni-P合金镀层的组织与性能的影响[J].热加工工艺,2009,38(10):142-144.
[8] 蒋荣荣.化学镀Ni-P-La合金工艺研究[J].南京师范大学学报(工程技术版),2004,4(4):76-78.
[9] 陈一胜,刘慧舟,王勇.稀土对化学镀镍磷合金镀层性能的影响[J].金属热处理,2003,28(6):35-39.
[10] 张敬尧,虞宙.稀土对Ni-P化学镀层组织结构及性能的影响[J].材料保护,2013,46(2):10-12.
[11] 周长海,刘爱莲,许玉容,等.Ni-P-Al2O3化学复合镀层的制备及其耐磨性能[J].黑龙江科技大学学报,2015,25(3):261-264.
[12] 雪金海,吴蒙华.热处理对Ni-P-Al2O3化学复合镀层摩擦磨损性能的影响[J].材料保护,2011,44(10):65-67.
[13] 宋玉强,王引真,何艳玲.化学镀Ni-P镀层高温热处理后耐蚀性的研究[J].材料保护,2003,36(5):31-33.