照9集96焦 2015年12月
·性能研究·
热处理技术与装备
RECHULIJISHUYUZHUANGBEI
双辉等离子表面冶金的Ni-Cr合金层组织
结构及耐蚀性能研究
阮野，般瑛孔泼宇，杨梅，熊瑜娟，黄俊”
（1.南昌航空大学，江西南昌330063；2.江西省科学院，江西南昌330029）
Vol.36,No.6 Dee,2015
摘要：为了改善Q235碳钢表面耐蚀性能，采用双辉等离子表面冶金技术在其表面制备Ni-Cr合金层。研究了极间距对合金层组织结构的影响规律，并对合金层的组织成分和耐蚀性能进行检测分析。结果表明：随着极间距增大，Ni-Cr合金层厚度呈现先增加后减小的趋势；Ni-Cr合金层组织均匀致密，与基体呈冶金结合状态，合金层厚度约为95um，主要物相为Niz.，Cra.，Fea.36和少量Ni,Fe。电化学极化曲线试验结果显示Ni-Cr合金层的自扁蚀电位和极化电阻较基材Q235高，而自腐蚀电流密度较低，即Ni-Cr合全层更难以发生电化学腐蚀反应且离蚀速率更低。表明Q235钢经Ni-Cr共渗处理后，其耐蚀性得到明显改善。
关键词：双层辉光等离子表面冶金技术：Q235钢；Ni-Cr合金层；极化曲线
中图分类号：TC174.444文献标志码：A
文章编号：1673-4971(2015)06-0012-04
Study on Structureand CorrosionResistanceof Ni-Cr Alloyed
Layer by DoubleGlow Plasma SurfaceMetallurgy
RUAN Ye',YIN Ying’,KONG Jun-yu',YANG Mei', XIONG Yu-juan',HUANG Jun
(1. Nanchang Hangkong University, Nanchang Jiangxi 330063,China; 2. Jiangxi Academy of Sciences,Nanchang Jiangxi 330029,China)
Abstract: In order to improve corrosion resistance of Q235 steel, the double glow plasma surface metallur-gy was applied on surface of Q235 steel to prepare Ni-Cr alloyed layer. The effect of electrode distance on the structure of Ni-Cr alloyed layer was studied, and the structure, composition and corrosion resistance of Ni-Cr alloyed layer were detected. Result showed that with the increasing of electrode distance, the thick-ness of Ni-Cr alloyed layer showed trend of first increased and then decreased. The Ni-Cr alloyed layer was density, and had a metallurgical bonding with substrate. The thickness of Ni-Cr alloyed layer was 95 μm, and the main phase of alloyed layer was Niz.gCra.,Feg.x and a litle of Ni, Fe. The polarization curve indi-cated that the selfe-corrosion potential and polarization resistance of Ni-Cr alloyed layer were higher than one of Q235 base material and selfr-corrosion current density was lower. It meant that the Ni-Cr alloyed layer had more difficult electrochemical corrosion reaction and lower corrosion rate. The results demonstra-
ted that the corrosion resistance of Q235 steel was significantly improved afier Nickelchromiumizing. Key words:double glow plasma surface metallurgy ; Q235 steel; Ni-Cr alloyed layer; polarization curve
收稿日期：2015-07-21
作者简介：既野(1991-），男，本科，主要从事材料表面处理工作。
联系电话：18720062372;E-mail;48253179@qq.com
基金项目：博士启动金（EA201301029）。万方数据