2Cr13钢离子渗氮和WCrAlTiSiN离子镀复合处理及电化学行为  

Electrochemical Behavior of 2Cr13 Steels by Duplex Treatment of Plasma Nitriding and WCrAlTiSiN Ion Plating

作　　者：卢金鹏 张念武[2] 王政伟 张哲浩 邵明昊 李杨 何永勇[3] LU Jinpeng;ZHANG Nianwu;WANG Zhengwei;ZHANG Zhehao;SHAO Minghao;LI Yang;HE Yongyong(School of Nuclear Equipment and Nuclear Engineering,Yantai University,Yantai 264005,China;China Classification Society Qingdao Branch,Qingdao 266072,China;State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China;School of Electromechanical Automobile Engineering,Yantai University,Yantai 264005,China)

机构地区：[1]烟台大学核装备与核工程学院,烟台264005 [2]中国船级社青岛分社,青岛266072 [3]清华大学摩擦学国家重点实验室,北京100084 [4]烟台大学机电汽车工程学院,烟台264005

出　　处：《中国表面工程》2024年第1期137-147,共11页China Surface Engineering

基　　金：国家自然科学基金(52175192)。

摘　　要：马氏体不锈钢的常规表面改性方法基本局限在单一化学热处理或镀膜,对表面性能的提升有限。对2Cr13不锈钢进行离子渗氮与多弧离子镀WCrAlTiSiN纳米多层涂层复合强化处理,研究其在天然海水环境中的耐腐蚀性能。采用不同的表面强化工艺,即未处理(Untreated)、低温渗氮处理(LPN)、高温渗氮处理(HPN)、单一镀膜处理(Coating)、低温渗氮+镀膜处理(LPN+C)和高温渗氮+镀膜处理(HPN+C)。采用X射线衍射、光学显微镜、透射电子显微镜和维氏硬度计对不同样品的组织结构、化学成分和硬度等进行表征。采用电化学阻抗法和动态电位极化法对2Cr13在天然黄海海水中的电化学行为进行测试。试验结果表明:WCrAlTiSiN涂层可在一定程度上提升腐蚀性能,但是溶液中的Cl^(−)通过较薄单一涂层的缺陷侵入基体。LPN样品因渗氮层的存在提升了一定的耐腐蚀性能,而HPN样品因为渗氮温度过高而导致CrN大量析出,使得样品表面出现“贫Cr”现象,耐腐蚀性能下降。复合处理样品的渗氮层-WCrAlTiSiN涂层可形成保护屏障,有效阻止电荷转移和电流从阳极流向阴极,提高2Cr13钢在海水环境中的耐腐蚀性能。通过离子渗氮-多弧离子镀WCrAlTiSiN纳米涂层复合强化方法可有效提升马氏体不锈钢在海水中的耐腐蚀性能。The poor corrosion resistance of 2Cr13 steel significantly affects its service life in marine environments,such as petrochemical,naval,and ocean engineering.Currently,strengthening methods for martensitic stainless steel are mainly limited to a single chemical heat treatment or coating,and there is relatively little research on composite treatment processes,especially nitriding and nano-multilayer coating.Plasma nitriding and multi-arc ion plating(WCrAlTiSiN multilayer coating)were used for the composite strengthening of 2Cr13 martensitic stainless steel,and its corrosion resistance in the natural Yellow Seawater environment was studied.2Cr13 was subjected to ion nitriding using an LDMC-20F pulsed glow discharge ion-nitriding furnace.The sample was placed on the cathode of a nitriding furnace,and the internal pressure of the furnace was reduced to 10 Pa.The voltage was adjusted to 750 V with a duty cycle of 73%,and the temperature was adjusted to 440 or 480℃.The internal NH3 pressure was maintained at 350 Pa,and the sample was heat-treated for 5 h.Untreated,“LPN,and HPN”samples were deposited with(W,Cr,Al,Ti,Si)N multilayer coatings using an industrial HCCE-280 cathodic arc evaporation system.Three W(99.99%),three Cr(99.99%),one Al-Ti-Si,and one Al-Ti alloy targets were selected.The current parameters for each target were adjusted according to the desired deposition rate.A very thin Cr bonding layer was deposited on the polished surface of the sample in an argon atmosphere,followed by the deposition of a CrN transition layer in a nitrogen atmosphere.Subsequently,in a mixed atmosphere of argon and nitrogen,a CrTiAlSiN layer was deposited on three Cr,one Al-Ti,and one Al-Ti-Si targets.Finally,multiple nanoscale WCrAlTiN layers were prepared as the outermost layer using programmed alternating deposition of WCrAlTiN and CrWAlTiN layers enriched with W and Cr,respectively.The structure,chemical composition,and hardness of the samples were characterized using X-ray diffraction,optical microscopy,transmission elec

关 键 词：氮化物涂层 离子渗氮 多弧离子镀 显微硬度 电化学腐蚀 

分 类 号：TG174[金属学及工艺—金属表面处理] TG115[金属学及工艺—金属学]