摘要
采用电弧离子镀技术在模具钢H13表面沉积Cr_(x)Ti_(1-x)N涂层,系统研究了不同Cr/Ti原子比对CrTiN合金化涂层结构、力学性能以及耐腐蚀性能的影响。结果表明:通过改变分离靶弧流实现CrTiN涂层中Cr/Ti原子比的有效调控,所制备的CrTiN涂层主要由面心立方结构(Cr,Ti)N和CrN组成,随着Cr/Ti原子比从1.1增加至1.8,涂层相结构由随机取向向(111)晶面优先生长转变。CrTiN合金化涂层显微硬度较CrN涂层得到明显提升,并随着固溶引起的晶格畸变程度变化而具有一个极大值。通过电化学阻抗谱和动电位极化曲线分析,当Cr/Ti原子比为1.4时,致密的Cr_(0.59)Ti_(0.41)N涂层具有最佳的耐腐蚀性能。
Cr_(x)Ti_(1-x)N coatings were deposited on H13 mould steel substrate by arc ion plating,and the influence of Cr/Ti atomic ratio on structure,mechanical properties and corrosion resistance of the as-deposited CrTiN coating was investigated.The results show that the CrTiN coating with different Cr/Ti atomic ratios is obtained by adjusting arc current.The CrTiN coating is composed of solid solution fcc-(Cr,Ti)N and CrN phases.With the increase of Cr/Ti atomic ratio from 1.1 to 1.8,the structure of the coating changes from a random orientation to(111)preferred growth.Microhardness of the CrTiN coating is improved as compared with CrN coating and has a maximum value with the change of lattice distortion caused by solid solution.According to electrochemical impedance spectroscopy and potentiometric polarization curve analysis,the dense Cr_(0.59)Ti_(0.41)N coating shows the best corrosion resistance when the Cr/Ti atomic ratio is 1.4.
作者
王其晒
张林
李伯荣
张宝荣
赵志勇
Wang Qishai;Zhang Lin;Li Borong;Zhang Baorong;Zhao Zhiyong(Research Center of Modern Surface and Interface Engineering,Anhui University of Technology,Ma'anshan Anhui 243002,China;Guangdong Zhenhua Technology Co.,Ltd.,Zhaoqing Guangdong 526040,China;Shanxi Diesel Engine Industry Co.,Ltd.,Datong Shanxi 037000,China)
出处
《金属热处理》
CSCD
北大核心
2021年第8期219-225,共7页
Heat Treatment of Metals
基金
安徽省自然科学基金(2008085QE202)
安徽高校自然科学研究项目(KJ2020A0265)
安徽省重点研究与开发计划(202004h07020020,202004b11020011)。
关键词
电弧离子镀
Cr/Ti原子比
力学性能
耐蚀性
arc ion plating
Cr/Ti atomic ratio
mechanical properties
corrosion resistance
