刀具化学镀耐磨涂层的制备工艺及性能研究  

Research on the Manufacture Process and Properties of Electroless and Resistance Coating of Cutting Tool

作　　者：张立红[1] 张祖军[1] 刘继光[1] 

机构地区：[1]西南科技大学

出　　处：《工具技术》2009年第4期79-81,共3页Tool Engineering

基　　金：西南科技大学青年基金项目(项目编号:07zx3152)

摘　　要：刀具磨损是机械加工刀具常见的失效形式,高速钢刀具是最常用的切削刀具,本研究以高速钢为基体材料,以Nj-W-P为基质合金,通过适当的前处理技术在高速钢刀具表面制作Ni-W-P合金镀层。扫描电镜照片显示Ni-W-P合金镀层呈胞状结构,镀层成份分析表明,Ni、W、P的质量分数分别为81.14%、4.17%和3.15%,原子分数分别为63.26%、1.04%和4.65%,该镀层为低磷含量镀层。x射线衍射图谱分析,该镀层为晶体结构。经300℃热处理后,显微硬度以及耐磨性提高,显微硬度是基体材料的2倍,耐磨性是基体材料的4倍。通过该工艺得到的Ni-W-P合金镀层表面光亮,涂层均匀,结合力良好。The wear of the cutting tool is the commonly ineffective way of the mechanical process of the cutting tools, high-speed steel cutting tool is the most familiar cutting tools. This research use the high- speed steel as the substratum materials, the Ni - W- P as the substrate alloy and furthermore by adopting proper pretreatments of processing Ni - W - P alloy deposit on the surface of high-speed steel cutting tool. SEM photo reveals that the electroless Ni - W - P alloy deposit presents cystiform structure. The deposit component analysis shows that the mass fraction of Ni ,W and P is 81.14% ,4.17% and 3.15% ;the atom fraction is 63.26% , 1.04% and 4.65% respectively. This alloy deposit is of lower phosphor component. The X-ray diffractive atlas analysis shows that this alloy deposit is of crystal structure . After the 300℃ heat treatment both the micro hardness and wear resistance increase. The micro hardness is tow times of that of the substratum materials and the wear resistance is four times of that of substratum materials. The surface of the Ni - W - P alloy deposit obtained by this way is smooth, the coating is symmetrical and the Ni - W - P alloy deposit＇ s adhesion is also well.

关 键 词：刀具 化学复合镀 显微硬度 耐磨性 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TG71[金属学及工艺—金属学]