电化学蚀除YT15硬质合金刀具表面的SEM分析  

SEM analysis of electrochemical corrosion machining on the surface of cement carbide YT15

作　　者：蔡晓[1] 庞桂兵[1] 辛开开 季田[1] 王帅[1] 徐文骥[2] CAI Xiao PANG Guibing XIN Kaikai JI Tian WANG Shuai XU Wenji(School of Mechanical Engineering and Automation, Dalian Polytechnic University, Dalian 116034, China School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China)

机构地区：[1]大连工业大学机械工程与自动化学院,辽宁大连116034 [2]大连理工大学机械工程学院,辽宁大连116024

出　　处：《大连工业大学学报》2016年第6期482-485,共4页Journal of Dalian Polytechnic University

基　　金：国家自然科学基金资助项目(51275062);辽宁省优秀人才支持计划项目(LR2014014);大连市科技计划项目(2015A11GX025)

摘　　要：以YT15为实验对象,对原始表面进行统一加工条件下的研磨处理,使之具有一致的表面粗糙度,进行电化学蚀除实验,获得SEM图像进行分析对比。实验发现,不同电解液获得的表面微观腐蚀形貌差异显著,NaNO_3钝化成膜性能良好,表面膜厚而致密,不同电极电位的合金项组分蚀除效果差异明显;NaOH没有明显的钝化成膜现象,不同合金项组分的蚀除效果差异不显著;H_2SO_4+H_3PO_4则有较薄而均匀的成膜能力,能有效抑制合金项的不均匀蚀除作用。The original surface of specimen was lapped under the unified processing condition to obtain the uniformed surface roughness using YT15 as material.The electrochemical machining experiment was carried out and SEM pictures were obtained. The result showed that micro corrosion morphologies on surface of different electrolytes were significantly different.NaNO3 had good performance of passivation film,with thick and dense surface.The effect of different electrode potential on the corrosion of the alloy was obvious.NaOH had no obvious passivation film and no significant difference in different alloy parts.H2SO4 ＋ H3PO4 had thin and uniform film forming ability,which could suppress the non-uniform corrosion effect effectively.

关 键 词：硬质合金 电化学加工 电解液 微观形貌 

分 类 号：TG713.1[金属学及工艺—刀具与模具]