热轧温度对电解厚镍性能影响的研究  

Research on the Effects of Hot Rolling Temperature on Electrolytic Thick Nickel Performance

作　　者：张贝贝[1] 王春霞[1] 吴光辉[1] 胡小萍[1] 林茜[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《电镀与精饰》2017年第2期9-13,共5页Plating & Finishing

摘　　要：通过Gleeble-3500热模拟试验机对电解厚镍进行热加工,研究不同的热轧工艺下电解厚镍的晶面取向、晶粒度、组织、耐蚀性以及电化学溶解性能的变化。采用X-射线衍射仪分析热轧加工后电解厚镍的晶面取向及晶粒度;采用金相显微镜观察电解厚镍的金相组织;采用电化学工作站测试电解厚镍的耐蚀性以及溶解性能。结果发现电解厚镍在热轧加工过程中,产生了严重的变形织构,使电解厚镍呈现(220)晶面取向择优,同时伴随着晶粒粗大等问题。电化学测试表明热轧加工改变了电解厚镍的耐蚀性能和溶解性能,经热轧加工后的电解厚镍,其自腐蚀电位由-475 m V变为-401 m V,自腐蚀倾向降低,耐蚀性能提高;自腐蚀电流密度从603.7 m A/m^2降低到216.2 m A/m^2,腐蚀速率减慢;电化学溶解速率减缓,溶解性能与INCO镍较为接近。Through heat treatment of electrolytic thick nickel by Gleeble-3500 thermal simulation test machine,the changes of crystal face orientation,grain size,microstructure,corrosion resistance and electrochemical dissolution performance of the electrolytic thick nickel under different hot rolling processes were researched. The crystal face orientation and grain size of the electrolytic thick nickel after hot rolling process were analyzed by X-ray diffraction; the metallographic microstructure of the electrolytic thick nickel was observed by metallographic microscope; the corrosion resistance and solubility of the electrolytic thick nickel were tested by electrochemical workstation. Results showed that serious microstructure deformation happened during the hot rolling process,which made the electrolytic thick nickel present a preferred（ 220） crystal face orientation and accompany coarse grains and other problems at the same time. The electrochemical test showed that the corrosion resistance and solubility performance of the electrolytic thick nickel had been changed by the hot rolling process. After the hot rolling process,the selfcorrosion potential of the electrolytic thick nickel was changed from-475 m V to-401 m V,the self-corrosion tendency was reduced and the corrosion resistance performance was improved; the self-corrosion current density was reduced from 6. 037 A / dm2 to 2. 162 A / dm2,and the corrosion rate was slowed down; the electrochemical dissolution rate was reduced,the solubility performance was more close to INCO nickel.

关 键 词：变形织构 晶粒度 金相组织 耐蚀性 溶解性 

分 类 号：TQ153.12[化学工程—电化学工业]