铁-纳米ZrO2复合电镀层的组织与性能
Microstructure and Performance of Electroplated Fe-nano ZrO2 Composite Coating
摘 要
采用氯化物低温镀铁工艺,选择纳米ZrO2作为第二相粒子,以不对称交流-直流电源电镀法制备了铁-纳米ZrO2复合镀层;研究了工艺参数对镀层组织结构和镀层硬度、耐磨性能的影响.结果表明:采用此方法可获得内应力小、致密的复合镀层,镀层为α-Fe体心立方结构;当镀液中ZrO2纳米粒子含量为30 g/L,pH值为1,搅拌转速为300 r/min,阴极电流密度为20 A/dm2,施镀温度为30~40 ℃时,ZrO2粒子在镀层中弥散分布,镀层的平均硬度值达到800 HV.镀铁层中复合适量的ZrO2纳米粒子,能有效地降低粘着磨损,提高镀层的耐磨性能.
铁-纳米ZrO2复合镀层
硬度
耐磨性能
electroplating
Fe-nano ZrO2 composite coating
hardness
wear resistance
Abstract
Fe-nano ZrO2 composite coating was prepared by adopting chloride low temperature iron electroplating technology,choosing nano ZrO2 as second phase particle,and using asymmetric AC-DC electroplating.The influence of technological parameters on microstructure,microhardness and wear resistance of coating was investigated.Results indicate that adopting asymmetric AC-DC electroplating can gain compact coatings with small inner stress.The coating is body-centered cubic α-Fe crystal structure.When nano ZrO2 particle content in solution was 30 g/L,pH value was 1,mixing speed was 300 r/min ,cathode current density was 20 A/dm2 and temperature was 30-40 ℃,the ZrO2 particles dispersed in coating and the average microhardness of costing achieved 800 HV.A moderate amount of ZrO2 nano particles in coating can reduce adhesion wear,and therefore increase the wear resistance of coating.
中图分类号 TG174.4
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收稿日期 2006/10/13
修改稿日期 2007/3/28
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备注许乔瑜(1955-),男,广东梅县人,副教授,博士.
引用该论文: XU Qiao-yu,LIU Fang,LU Jin-tang,KONG Gang,CHE Chun-shan. Microstructure and Performance of Electroplated Fe-nano ZrO2 Composite Coating[J]. Materials for mechancial engineering, 2007, 31(9): 51～54
许乔瑜,刘芳,卢锦堂,孔纲,车淳山. 铁-纳米ZrO2复合电镀层的组织与性能[J]. 机械工程材料, 2007, 31(9): 51～54
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