Cr3C2-CrB_Ni60激光熔覆层的耐蚀性研究

ＣｅO2对镍基碳化钨激光熔覆层组织和耐腐蚀性能的影响匡建新1 汪新衡1，朱航生2（１. 湖南工学院机械工程系；2. 衡阳丰顺车桥有限公司产品部,湖南衡阳4２1０0２)摘要:采用Ni60+70wt%镍包碳化钨合金粉末在45钢基材表面进行了激光熔覆。

对比研究了添加不同含量CeO2 在不同激光功率条件下对激光熔覆层的显微组织、裂纹情况、硬度分布及耐腐蚀性能的影响。

适量CeO2的加入能使镍基碳化钨金属陶瓷熔覆层组织细化，裂纹大为减少甚至消失,宏观质量得到显著改善。

添加适量ＣeO2的激光熔覆层的耐腐蚀能力比不含ＣeＯ2的激光熔覆层要高且显著优于０Cｒ18Nｉ9不锈钢。

关键词:CeO2;激光熔覆；裂纹；微观组织；耐腐蚀性Effect of CeO2ｏn the Structure ａnd Ｃoｒrosｉon Ｒesistａnce ｏｆNｉ／WC ｃｌaddinｇlａyerKANG Ｊian－xｉn１,ＷANG Xin-ｈeｎｇ1, ZＨＵＨａng-ｓheng2（1. Dept. ｏf ＭｅchａｎiｃａlＥngineerinｇ, Hu’nan Instｉtｕｔe ｏf Teｃｈｎology,；2．Ｐroducｔs DiｖisｉoｎofＨｅngyaｎg Fenｇshun AutomdbilｅAxle CO.LTD，Hengyaｎg Hu’naｎ42１002,Ｃhina）Aｂstract:Ni6０+Ｎi／WＣcomposite alloｙcoａtingｓon 45 ｓteeｌｈaｓbeen prepared by laseｒclaｄｄinｇteｃhnology.Ｔｈｅinfluenｃe of CｅO2 contenｔｓanｄlaser pｏｗer on tｈe miｃrostｒucturｅ，crａck, mｉcroｈardness and coｒrosion ｒesｉst ａncｅhas ｂeｅn stｕｄｉed.Ｉt iｓsｈｏwn tｈat tｈe miｃrostrｕcture of lasｅｒｃoａｔｉnｇs iｓｇreａtly refiｎed anｄthe crackｓiｓｏbviously reｄuced or even vaｎｉｓhｅｄby ａddｉtｉon of prｏper ａmouｎt ofＣeO2．Tｈｅcorrosion resiｓtance of tｈe coatings with ｐropｅr amouｎtｏf CeO2 is betteｒｔｈaｎthat ｏf the coatingｓwiｔhout ＣｅＯ2. Ｂuｔtｈere iｓraised ｒｅmarkａblyｗith stｅeｌ0Cr1８Ｎi９.Kｅy wｏrds:CｅO2;laｓer ｃladｄing；craｃk;ｍiｃrostrｕcｔuｒe；corroｓiｏnｒesiｓt ａｎｃe引言金属陶瓷激光熔覆中最棘手的问题是熔覆层的开裂和基体的变形，并在很大程度上限制了这一技术的应用。

表面技术第52卷第9期激光熔覆(Ni60+NbC)+h-BN@Cu涂层组织与性能研究黄旭a,b，徐伟麒b，张家诚b，江吉彬b，练国富b，黄文泰b，胡新新b，玉津宇b（福建工程学院 a.福建省智能加工技术及装备重点实验室b.机械与汽车工程学院，福州 350118）摘要：目的通过添加铜包覆六方氮化硼（h-BN@Cu）粉末，改善激光熔覆Ni基NbC涂层的性能。

方法采用激光熔覆技术，使用添加不同质量分数铜包覆六方氮化硼的镍基碳化铌复合粉末，在45钢基体表面沉积镍基复合涂层。

利用扫描电子显微镜（SEM）和X射线衍射（XRD）设备，研究h-BN@Cu对Ni60/NbC的激光熔覆镍基复合涂层微观结构的影响，利用显微硬度计和布鲁克UMT-2摩擦磨损试验机及白光干涉模块，测量熔覆层的显微硬度、摩擦磨损系数和磨痕宽度。

结果熔覆层中的主相为Ni-Cr-Fe，除此之外还存在FeNi3、CrB、M7C3、NbC、M23C6、Cr2Nb等多种相。

研究发现，添加的润滑相h-BN@Cu与硬质相NbC会发生部分分解，Nb原子和B原子进入熔池，与熔池中的Cr原子反应，生成CrB、Cr2Nb等，这些金属间化合物具有硬度高、耐磨性好等特点。

当h-BN@Cu的质量分数为10%时，熔覆层的显微硬度为650HV1.0，摩擦系数为0.4，磨痕宽度为0.406 mm。

结论相比于不添加h-BN@Cu的Ni60/NbC熔覆层，添加h-BN@Cu 的Ni60/NbC熔覆层的平均硬度略微下降，但熔覆层硬质相分布更加均匀，此时硬度仍为45钢基体硬度的3.1倍，摩擦系数降低约27%，磨痕宽度减小约21%。

关键词：激光熔覆；NbC；h-BN@Cu；硬度；XRD；摩擦磨损性能中图分类号：TH117 文献标识码：A 文章编号：1001-3660(2023)09-0430-09DOI：10.16490/ki.issn.1001-3660.2023.09.039Microstructure and Properties of Laser Cladding(Ni60+NbC)+h-BN@Cu CoatingsHUANG Xu a,b, XU Wei-qi b, ZHANG Jia-cheng b, JIANG Ji-bin b, LIAN Guo-fu b,HUANG Wen-tai b, HU Xin-xin b, YU Jin-yu b(a. Fujian Key Laboratory of Intelligent Machining Technology and Equipment,b. School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China)收稿日期：2022-08-21；修订日期：2023-01-08Received：2022-08-21；Revised：2023-01-08基金项目：福建省高校创新团队发展计划（闽教科〔2020〕12号）；长服役期铝合金建筑模板制造关键技术及智能装备研发(2021H4107)；福建省2022年中央引导地方科技发展资金项目（2022L3014）Fund：Supported by Program for Innovative Research Team in Science and Technology in Fujian Province University ([2020]12); Long-term Service Period Aluminum Alloy Building Formwork Manufacturing Key Technology and Intelligent Equipment Research and Development (2021H4107)；Fujian Province 2022 Central Government Guiding Local Science and Technology Development Projects (2022L3014)引文格式：黄旭, 徐伟麒, 张家诚, 等. 激光熔覆(Ni60+NbC)+h-BN@Cu涂层组织与性能研究[J]. 表面技术, 2023, 52(9): 430-438.HUANG Xu, XU Wei-qi, ZHANG Jia-cheng, et al. Microstructure and Properties of Laser Cladding (Ni60+NbC)+h-BN@Cu Coatings[J].第52卷第9期黄旭，等：激光熔覆(Ni60+NbC)+h-BN@Cu涂层组织与性能研究·431·ABSTRACT: The performance of laser cladding Ni-based NbC coatings was improved by adding copper-clad hexagonal boron nitride (h-BN@Cu) powder. Nickel-based Niobium carbide composite powder with different mass fractions of copper coated with hexagonal boron nitride was deposited on the surface of 45 steel matrix by laser cladding technology. A scanning electron microscopy (SEM) was used to analyze the microstructure and hard phase distribution of the coating; The phase composition was analyzed with an energy dispersive spectroscopy (EDS); The phase in the coating was characterized by X-ray diffraction (XRD); The microhardness of the cladding layer was measured with a microhardness tester; The wear resistance of the cladding layer was tested with a Bruker UMT-2 friction testing machine, and a white light interference module was used. The three-dimensional topography of the wear scar was measured, and the wear volume was calculated. The results showed that the main phase in the cladding layer was Ni-Cr-Fe, and other phases such as FeNi3, CrB, M7C3, NbC, M23C6 and Cr2Nb existed. The study found that when h-BN@Cu was not added, the cladding layer was mainly composed of Ni-Cr-Fe, FeNi3, CrB, M7C3, NbC, M23C6 and other phases, and the shape of NbC particles was mainly irregular polygons. After the addition of h-BN@Cu, the unmelted h-BN phase in the cladding layer increased, and the NbC morphology changed to a cross-like and petal-like structure, and the other phase compositions did not change significantly. This was due to the coating effect of Cu powder, which prevented the melting of part of h-BN, while with the increase of h-BN@Cu content, the laser absorption efficiency during the cladding process was improved, so that the molten pool absorbed more energy and promoted NbC particles disintegrate and re-grow. And after the addition of h-BN@Cu, the reflectivity of the laser was reduced and the dilution rate was increased. Excessive addition ******************************************************************************************************* the addition of h-BN@Cu, the molten pool absorbed too much energy, which leaded to the decomposition of part of h-BN into B and N. N and O in the surrounding environment generated NO, which was then melted under the action of Marangoni flow. Pore defects were formed in the middle and lower part of the cladding layer, which affected the performance of the cladding layer.When the h-BN@Cu content gradually increased, the wear resistance of the cladding layer first increased and then decreased due to the good lubricating properties of Cu and h-BN. When the h-BN@Cu content was 10%, the friction coefficient of the cladding layer was 0.4, the wear scar width was 0.406 mm, and the wear resistance was the best. Compared with the Ni60/NbC cladding layer without h-BN@Cu, the average hardness of the Ni60/NbC cladding layer with h-BN@Cu is slightly decreased, but the hard phase distribution of the cladding layer is more uniform, and the hardness is still 3.1 times that of the 45 steel matrix. The friction coefficient is reduced by about 27%, and the wear scar width is reduced by about 21%. The research results provide a reference for the preparation of nickel-based composite coatings with excellent performance.KEY WORDS: laser cladding; NbC; h-BN@Cu; hardness; XRD; friction and wear performance随着现代工业的快速发展，零部件的表面磨损失效问题日益突出。

表面技术第52卷第4期Ni60与NiCr-Cr3C2涂层的机械和热冲击性能对比研究赵青山1，宋学平1，李来军1，曹文辉1，柴廷玺2（1. 兰州石化职业技术大学 机械工程学院，兰州 730060；2. 兰州城市学院 培黎机械工程学院，兰州 730070）摘要：目的合理选择涂层材料，以提高5CrNiMo热作模具的使用寿命。

方法采用超音速火焰喷涂制备Ni60和NiCr-Cr3C2涂层，对比研究2种粉末所获涂层的微观组织结构、力学性能及机械冲击和热冲击性能。

结果Cr3C2硬质颗粒可大幅度提高涂层的硬度，在喷涂过程中，Cr3C2硬质颗粒在撞击过程中具有更高的压应力，促进了喷丸效应，使20%NiCr-80%Cr3C2涂层内部及与基体结合界面无明显裂纹。

因而，与Ni60涂层相比，20%NiCr-80%Cr3C2涂层具有较高的表面显微硬度（818.9HV）和结合强度（64.04 MPa）。

机械冲击试验后，20%NiCr-80%Cr3C2涂层因具有优异的力学性能，被冲击区域的宏观裂纹较少，且未发生明显剥落。

2种涂层机械冲击失效的主要机理为高载荷冲击所致的涂层塑性损伤与断裂。

由于20%NiCr-80%Cr3C2涂层中存在大量的Cr3C2脆性相，使其同时发生次要的脆性断裂。

100次循环热冲击后，2种涂层均未发生剥落，但Ni60涂层表面呈黑蓝色和凹凸不平，表明NiCr-Cr3C2涂层具有更好的抗热冲击能力。

结论20%NiCr- 80%Cr3C2涂层具有更优的微观组织、力学性能、机械冲击和热冲击性能。

关键词：涂层；HVOF；模具钢；机械冲击；热冲击中图分类号：TH117.1文献标识码：A 文章编号：1001-3660(2023)04-0436-10DOI：10.16490/ki.issn.1001-3660.2023.04.040Comparative Study on Mechanical Impact and Thermal ShockProperties of Ni60 and NiCr-Cr3C2 CoatingsZHAO Qing-shan1, SONG Xue-ping1, LI Lai-jun1, CAO Wen-hui1, CHAI Ting-xi2(1. School of Mechanical Engineering, Lanzhou Petrochemical University of V ocational Technology, Gansu Lanzhou 730060,China; 2. Peili School of Mechanical Engineering, Lanzhou City University, Gansu Lanzhou 730070, China)ABSTRACT: The work aims to improve the service life of hot-work dies (5CrNiMo) by selecting coating material reasonably.Ni60 and NiCr-Cr3C2 coatings were prepared through the supersonic flame spraying technology, and the microstructure,收稿日期：2022–04–09；修订日期：2022–08–29Received：2022-04-09；Revised：2022-08-29基金项目：甘肃省自然科学基金项目（17JR5RA006）；甘肃省高等学校创新能力提升项目（2019A-198）；甘肃省高等学校科研项目（2020A-128）；甘肃省重点人才项目（2020-0623-RCC-0463）Fund：Gansu Natural Science Foundation Project (17JR5RA006); The Innovation Capacity Improvement Project for Colleges and Universities in Gansu Province (2019A-198); Scientific Research Project of Colleges and Universities in Gansu Province (2020A-128); Key talent project of Gansu Province (2020-0623-RCC-0463)作者简介：赵青山（1987—），男，硕士，讲师，主要研究方向为焊接工艺和表面工程。

微-纳结构Cr3C2-NiCr金属陶瓷涂层的腐蚀磨损行为研究微/纳结构Cr3C2-NiCr金属陶瓷涂层的腐蚀磨损行为研究随着工业的发展和对优化材料性能的需求，金属陶瓷涂层在材料表面保护和功能改善方面得到了广泛应用。

其中，微/纳结构Cr3C2-NiCr金属陶瓷涂层以其优异的抗腐蚀和耐磨性能成为研究的热点。

首先，微/纳结构Cr3C2-NiCr金属陶瓷涂层的制备方法至关重要。

通常采用的方法包括高速喷涂、激光熔覆、等离子熔覆等。

这些方法可以在金属基体表面形成均匀、致密的涂层，提高涂层的附着力和表面质量。

同时，通过调节喷涂参数、合适的热处理和后续抛光，还可以进一步改善涂层的微/纳结构和性能。

其次，微/纳结构Cr3C2-NiCr金属陶瓷涂层的腐蚀性能也是关键。

湿润环境中，金属陶瓷涂层容易受到腐蚀作用，导致涂层性能的降低。

因此，研究涂层的腐蚀行为对于提高其抗腐蚀性能具有重要意义。

实验研究发现，微/纳结构Cr3C2-NiCr 金属陶瓷涂层在腐蚀介质中能够形成致密的氧化物保护层，从而有效地抵御腐蚀侵蚀。

此外，通过合理的合金设计和控制涂层中Cr3C2含量，还可以提高涂层的耐腐蚀性能。

最后，微/纳结构Cr3C2-NiCr金属陶瓷涂层的磨损行为也是研究的重点。

工程领域中，材料表面往往需要承受一定的摩擦和磨损。

为了提高涂层的耐磨性能，研究者通过微观结构设计和合金优化，使其具备较高的硬度和耐磨耗性。

实验结果表明，微/纳结构Cr3C2-NiCr金属陶瓷涂层在摩擦磨损条件下能够形成具有优异抗磨损性能的摩擦副表面，延长设备的使用寿命。

综上所述，微/纳结构Cr3C2-NiCr金属陶瓷涂层具有良好的抗腐蚀和耐磨性能，对于提高材料表面的功能与性能具有重要作用。

然而，目前对于微/纳结构Cr3C2-NiCr金属陶瓷涂层腐蚀和磨损行为的研究还较少，仍需要进一步的实验和理论研究来揭示其机理及影响因素，以更好地指导材料的设计与应用综合以上研究结果可知，微/纳结构Cr3C2-NiCr金属陶瓷涂层具有良好的抗腐蚀和耐磨性能。

第53卷第1期表面技术2024年1月SURFACE TECHNOLOGY·143·激光熔覆Ni-Al2O3复合涂层的微观结构与耐腐蚀性能研究孙勇辉1,2，闫洪3，兰昊1,2*，黄传兵1,2，于守泉1,2，孙小明1,2，张伟刚1,2（1.中国科学院赣江创新研究院，江西 赣州 341119；2.中国科学院过程工程研究所，北京 100190；3.南昌大学 先进制造学院，南昌 330031）摘要：目的解决Cr-Ni系不锈钢在重腐蚀工业环境中本体耐腐蚀性能不足的问题。

方法采用激光熔覆技术制备Ni-Al2O3复合涂层，利用X射线衍射、扫描电镜、能谱仪（EDS）和显微硬度计、电化学工作站等技术研究所制备涂层的微观结构、相组成和元素分布，分析Al2O3含量对复合涂层形貌、显微硬度和耐腐蚀性能的影响规律。

结果复合涂层组织均匀、无明显缺陷，与基体之间存在明显的冶金结合区，沿着该复合涂层深度方向的微观结构依次呈现为胞状晶、定向生长的柱状晶及细小的等轴晶，物相则由均匀分布于复合涂层顶部的Al2O3颗粒和金属间化合物（Fe-Ni、Fe-Ni-Cr固溶体）构成。

随着Al2O3含量的增大，复合涂层的显微硬度呈先增大后减小的趋势，腐蚀电位呈先增大后减小的趋势，而失重腐蚀速率和腐蚀电流密度呈先减小后增大的趋势，涂层的耐腐蚀性能呈先增强后减弱的趋势。

在Ni-x%Al2O3（x为0、0.15、0.25、0.35，质量分数）复合涂层中，Ni-25%Al2O3复合涂层具有较高的显微硬度和良好的耐腐蚀性能，该涂层的显微硬度达到 1 026.3HV，腐蚀失重速率为0.15 mg/(cm2·h)，腐蚀电压和腐蚀电流密度分别为–326.6 mV和38.6 µA/cm2。

当继续增加Al2O3的含量时，气孔和裂纹等缺陷开始增多，复合涂层的显微硬度和耐腐蚀性能均呈现下降趋势。

研究表明，Ni-x%Al2O3（x≤25）复合涂层的显微硬度和耐腐蚀性能的变化由细晶强化、固溶强化和颗粒强化协同作用所致。

碳化物增强激光熔覆非晶涂层的研究进展目录1. 内容简述 (2)1.1 背景与意义 (2)1.2 研究现状 (3)2. 碳化物增强激光熔覆技术 (5)2.1 原理与特点 (6)2.2 熔覆过程优化 (7)2.3 熔覆质量评价 (8)3. 非晶涂层的特性 (9)3.1 材料特性 (11)3.2 物理特性 (12)3.3 化学特性 (13)3.4 机械特性 (14)4. 碳化物增强激光熔覆非晶涂层的制备 (15)4.1 材料选择 (16)4.2 涂层制备工艺 (17)4.3 涂层性能调控 (18)5. 碳化物增强激光熔覆非晶涂层的研究进展 (19)5.1 薄膜的微观结构与形态 (20)5.2 相分析和成分表征 (22)5.3 涂层性能测试 (23)5.4 涂层应用与案例分析 (24)6. 面临的挑战与未来发展方向 (25)6.1 熔覆过程中的缺陷控制 (30)6.2 涂层的性能提升 (32)6.3 新技术与材料的探索 (32)7. 结论与展望 (34)1. 内容简述本论文综述了近年来碳化物增强激光熔覆等，这些材料具有高硬度、耐磨性和化学稳定性等特点。

通过激光熔覆技术，这些碳化物颗粒能够被均匀地引入到非晶合金或陶瓷涂层中，从而显著提高涂层的性能。

在非晶涂层的应用方面，技术被广泛用于提高材料的耐磨性、耐腐蚀性、耐高温性和抗冲击性。

特别是在航空、汽车和模具制造等领域，非晶涂层的需求日益增长，这推动了技术的快速发展。

本文将详细介绍技术的基本原理、工艺流程、关键参数以及不同碳化物增强材料对涂层性能的影响。

同时，还将探讨当前研究中存在的问题和挑战，并展望未来的发展趋势和潜在应用领域。

通过对现有文献的综合分析，为进一步深入研究碳化物增强激光熔覆非晶涂层提供参考和启示。

1.1 背景与意义随着科技的不断进步和工业领域对材料性能要求的提高，材料的表面处理技术也在不断发展。

激光熔覆作为一种先进的表面强化技术，通过将合金材料熔化并热扩散至基体材料表面，可以实现对材料表面性能的显著提升。

激光熔覆Ni基纳米复合涂层的冲蚀性能研究李守彪;万明奇;沈亮;时婧【摘要】目的对动态腐蚀条件下涂层的耐蚀性进行分析评估.方法采用激光熔覆技术,在40Cr钢表面沉积Ni基纳米复合涂层.模拟真实的海洋环境,对Ni基涂层进行冲蚀实验,分析了海水冲击、颗粒磨损等外力作用与腐蚀之间的耦合作用对涂层性能的影响.选用自制的360°旋转冲刷机,研究含沙量、旋转速度对涂层耐蚀性的影响,并对冲蚀后的样品进行显微观察、质量损失分析和电化学性能的测试.结果当含沙量为0.3％,腐蚀时间为48 h时,不同转速下耐蚀性由强到弱依次为300r/min>600 r/min>900 r/min;腐蚀时间为96 h时,不同转速下耐蚀性由强到弱依次为300 r/min>900 r/min>600 r/min;腐蚀时间为144 h时,不同转速下耐蚀性由强到弱依次为300 r/min>900 r/min>600 r/min.当转速为600 r/min时,腐蚀时间由48 h进行到144 h,在无沙条件下,质量几乎没有变化,甚至有微小的增量;当含沙量为0.3％时,涂层的质量损失较为明显,冲蚀144 h后,质量损失达73.71g/m2.结论当含沙量一定,且冲刷速度较低时,腐蚀主要以电化学作用为主,提高转速,腐蚀速率加快.当转速一定时,腐蚀速率增大.在含沙量很高的情况下,腐蚀情况稍有减缓.【期刊名称】《装备环境工程》【年(卷),期】2019(016)004【总页数】8页(P119-126)【关键词】激光熔覆;Ni基合金涂层;抗冲蚀机制;电化学性能【作者】李守彪;万明奇;沈亮;时婧【作者单位】青岛双瑞海洋环境工程股份有限公司,山东青岛 266101;海洋石油工程股份有限公司,天津300450;海洋石油工程股份有限公司,天津300450;中国海洋大学材料科学与工程学院,山东青岛 266100【正文语种】中文【中图分类】TG174.4Ni基涂层的防腐性能优良，是一种重要的海洋防腐防护金属涂层材料。

原位生成WB-CrB增强镍基激光熔覆层的耐蚀性研究
周笑薇;晁明举;杨文超
【期刊名称】《激光杂志》
【年(卷),期】2011(32)1
【摘要】采用静态浸泡法对原位生成WB-CrB增强镍基激光熔覆层的耐腐蚀性进行研究。

使用扫描电镜和X射线衍射仪对熔覆层进行显微组织和物相分析,在光学显微镜下观察样品表面腐蚀形貌。

结果表明:WB-CrB增强镍基激光熔覆层
(Ni60+16 wt.%(WO_3/B_2O_3+C))在10%H_2SO_4(质量百分数)溶液中表现出较好的耐腐蚀性能,与纯Ni60激光熔覆层相比,其耐蚀性提高2倍多。

【总页数】2页(P43-44)
【关键词】激光熔覆;WB-CrB增强镍基激光熔覆层;耐蚀性
【作者】周笑薇;晁明举;杨文超
【作者单位】郑州大学物理工程学院材料物理教育部重点实验室;郑州师范学院物理系
【正文语种】中文
【中图分类】TG156.99
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第53卷第1期表面技术2024年1月SURFACE TECHNOLOGY·135·Cr3C2/WC的添加对Stellite 12熔覆层耐磨耐蚀性的影响赵菲，张亮*，吴志生，温保安（太原科技大学 材料科学与工程学院，太原 030024）摘要：目的提高Stellite 12熔覆层的耐磨耐蚀性能。

方法将Stellite 12合金粉末与碳化物（Cr3C2、WC）混合，采用激光熔覆技术在H13钢板上制备复合熔覆层。

通过超景深显微镜和XRD分析其显微组织和物相，通过显微硬度测试、摩擦磨损试验和电化学腐蚀试验，分别评价熔覆层的硬度、耐磨性和耐蚀性，并通过超景深显微镜对磨痕形貌进行分析。

结果添加碳化物后，熔覆层的微观组织以柱状晶和树枝晶为主，物相主要由γ-Co固溶体和碳化物（M23C6、M7C3）组成；Cr3C2的添加使得熔覆层的硬度降低，由610HV0.2降至530HV0.2，但耐磨性得到提高，磨损量由0.45 mm3降至0.33 mm3，下降了28%，耐蚀性得到提高，腐蚀电位由−0.385 V增加到−0.264 V，腐蚀电流密度由9.269×10−10 A/cm2降至1.496×10−10 A/cm2，极化电阻由3.982×107Ω·cm2提升至2.424×108Ω·cm2，提高了1个数量级；WC的添加使其硬度由610HV0.2提高至750HV0.2，磨损深度变浅，磨损量由0.45 mm3降至0.19 mm3，下降了43%，但耐腐蚀性有所降低。

3种熔覆层的磨损机制主要为磨粒磨损和黏着磨损。

结论 WC的添加可以有效提高熔覆层的硬度和耐磨性，但耐腐蚀性有所降低；添加Cr3C2后，耐蚀性得到显著提高，耐磨性略微提升，但硬度降低。

关键词：激光熔覆；复合熔覆层；显微硬度；摩擦磨损行为；磨损机制；电化学腐蚀行为中图分类号：TG156.99文献标志码：A 文章编号：1001-3660(2024)01-0135-08DOI：10.16490/ki.issn.1001-3660.2024.01.013Effect of Cr3C2/WC on Wear and Corrosion Resistanceof Stellite 12 Cladding LayerZHAO Fei, ZHANG Liang*, WU Zhisheng, WEN Baoan(School of Materials Science and Engineering, Taiyuan University ofScience and Technology, Taiyuan 030024, China)ABSTRACT: The properties of composite cladding layers prepared by laser cladding technology will vary considerably with the reinforcing phase.In order to study the effect of different carbide contents on the properties of the Stellite 12 cladding layer, the raw material used was Stellite 12 alloy powder with carbide (Cr3C2 and WC). In addition, 30 cm×30 cm×10 cm H13 steel was adopted as the substrate, on which Stellite 12, Stellite 12+10%Cr3C2 and Stellite 12+10%WC were prepared by laser cladding technology. The three cladding layers of Stellite 12, Stellite 12+10%Cr3C2 and Stellite 12+10%WC were then cut,收稿日期：2022-10-17；修订日期：2023-03-13Received：2022-10-17；Revised：2023-03-13基金项目：山西省基础研究计划（面上）（202303021211195）Fund：Basic Research Planning Program of Shanxi Province (202303021211195)引文格式：赵菲, 张亮, 吴志生, 等. Cr3C2/WC的添加对Stellite 12熔覆层耐磨耐蚀性的影响[J]. 表面技术, 2024, 53(1): 135-142.ZHAO Fei, ZHANG Liang, WU Zhisheng, et al. Effect of Cr3C2/WC on Wear and Corrosion Resistance of Stellite 12 Cladding Layer[J]. Surface Technology, 2024, 53(1): 135-142.*通信作者（Corresponding author）·136·表面技术 2024年1月ground and polished and corroded with aqua regia. The microstructures of layers were analyzed by ultra-deep field microscopy, the surfaces were examined by Xrd to analyze the physical phases and the hardness, wear resistance and corrosion resistance were evaluated by microhardness testing, friction wear testing and electrochemical corrosion testing, respectively. The wear scar morphology was also analyzed by ultra-deep field microscopy.The metallurgical results showed that the microstructures of the cladding layers were dominated by columnar crystals and dendrites after the addition of carbides, with the grain transformation from bottom to top being flat crystals to columnar crystals and then to dendrites and good metallurgical bonding at the surface of the bonding interface. Xrd inspection results showed that the three cladding layers had phases mainly composed of γ-Co solid solution and carbides (M23C6, M7C3), but the addition of WC led to the precipitation of Co6W6C and M7C hard phases.In terms of microhardness, the melt layer of Stellite 12 was 610HV0.2, the addition of Cr3C2 reduced the hardness of the melt layer to 530HV0.2 and the addition of WC increased its hardness to 750HV0.2. The wear performance was analyzed in terms of its average friction coefficient, wear profile and wear volume. The addition of Cr3C2 reduced the average coefficient of friction from 0.324 28 to 0.291 87 and the wear volume from 0.45 mm3 to 0.33 mm3, a decrease of 28%, but the wear depth did not change much, while the addition of WC reduced the average coefficient of friction from 0.324 28 to 0.115 58 and the wear volume from 0.45 mm3 to 0.19 mm3, a decrease of 43%, and the wear depth became shallow, from 70 µm to about 30 µm. The wear mechanism of the three cladding layers was mainly abrasive wear and adhesive wear, as analyzed by ultra-deep field microscopy.The polarization curve showed that the corrosion potential of Cr3C2 increased from −0.385 V to −0.264 V, the corrosion current density decreased from 9.269×10−10 A/cm2 to 1.496×10−10 A/cm2 and the polarization resistance increased from 3.982×107Ω·cm2 to 2.424×108Ω·cm2, an increase of one order of magnitude. The corrosion resistance was significantly improved, while the addition of WC led to a reduction in corrosion resistance. Compared to the two carbide-added cladding layers, the addition of WC increases the hardness by about 1.4 times compared to the addition of Cr3C2, the depth of wear marks is almost 40 µm shallower and the wear is about 57% less, but the corrosion resistance is reduced and the self-corrosion potential is shifted to the left by 0.131 V.KEY WORDS: laser cladding; composite cladding layer; microhardness; friction and wear behavior; wear mechanism;electrochemical corrosion behavior一些大型且价值较高的零部件在长期运行后必然会因表面磨损和腐蚀而影响其使用情况及寿命，考虑到经济问题，应推动表面改性技术的发展，即在基体零部件表面制备一层性能优异的熔覆层[1]。