SiC微粒对Ni-W-SiC复合镀层工艺及性能的影响  

EFFECTS OF SiC PARTICLES ON PROCESS AND PROPERTIES OF Ni-W-SiC COMPOSITE COATINGS

作　　者：郭忠诚[1] 杨显万[1] 刘鸿康[1] 王志英[1] 王敏[1] 

机构地区：[1]昆明理工大学冶金系

出　　处：《化工冶金》1997年第2期108-114,共7页

摘　　要：讨论了工艺参数对镀层成份的影响及热处理方式对Ｎｉ－Ｗ－ＳｉＣ复合镀层组织结构、硬度和耐磨性的影响．结果表明，采用电沉积工艺，可得到含Ｎｉ５０～５５％、Ｗ４２～４５．４％、ＳｉＣ３．０～７．６％的复合镀层．ＮｉＷＳｉＣ复合镀层在镀态时为非晶态，经５００℃热处理１ｈ或氮碳共渗后，镀层已晶化，产生了镍固溶体和少量的－ＦｅＮｉ相，经氮碳共渗后还有ＷＣ和ＷＮ相．ＳｉＣ微粒的加入显著地提高了Ｎｉ－Ｗ合金层的硬度和耐磨性．经氮碳共渗后的复合镀层，其硬度和耐磨性优于其它镀层．The effects of plating conditions on the composition of coating and heattreatment on the microstructure, hardness and wear resistance of the Ni-W-SiC composite coating have been studied. Amorphous composite coating containing Ni 50%￣55%, W 42%￣45.4% and SiC 3.0%￣7.6% is obtained by electrodeposition. The coating becomes crystalline, with nickel solid solution and some γ -FeNi, WC and WN phases when being heat-treated at 500℃ for 1 h or nitro-carburized. Hardness and wear resistance of Ni-W alloys are raised obviously when SiC particles are included in the deposit. The nitro-carburized Ni-W-SiC composite coating is found superior to other coatings in hardness and wear resistance.

关 键 词：电沉积 复合镀层 硬度 耐磨性 金属基复合材料 

分 类 号：TG174.446[金属学及工艺—金属表面处理]