首页|WC含量对WC增强镍基复合涂层界面组织的影响

WC含量对WC增强镍基复合涂层界面组织的影响

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WC(碳化钨)增强镍基复合涂层具有高耐磨、耐腐蚀、高硬度特点,在盾构部件、旋耕刀具、石油钻探等领域广泛应用.为提高水力机械过流部件服役寿命,以WC颗粒和镍基粉状钎料为涂层材料,采用真空炉中热辐射钎涂方法在奥氏体不锈钢表面成功制备WC增强镍基复合钎涂层,借助扫描电镜、X射线衍射仪等对钎涂层显微组织和界面行为进行系统分析.结果表明,硬质相WC与镍基钎料界面结合存在机械咬合与冶金结合双重作用;钎涂层与钢基体之间存在一定程度的成分扩散,其较狭窄扩散区宽度约 100 μm;当WC含量低于 25%时,复合钎涂层对不锈钢基体润湿性较好,可制备出最低孔隙率1.08%的复合钎涂层.
Effect of WC content on the interface microstructure of nickel/tungsten carbide composite brazing coating
Nickel/tungsten carbide composite coating has high wear resistance,corrosion resistance,and high hardness characteristics.It is widely used in shield machine parts,rotary blade,and other fields.In order to improve the lifespan of the hydraulic machinery overflow components,the nickel/tungsten carbide composite brazing coating was successfully prepared.It was combined with the surface of austenitic stainless steel by brazing coating method with thermal radiation in vacuum fur-nace.In the joint,WC particles and nickel-based powder braz-ing alloys were used as coating materials.The microstructure and interfacial behavior of the brazing coating were analyzed with the scanning electron microscopy,X-ray diffractometer,and metallographic microscopy.The results show that the in-terface between WC hard-phase and nickel-based brazing alloy achieved mechanical and metallurgical bonding.There is cer-tain component diffusion between the brazing coating and steel substrate.And the thickness of narrowest diffusion area is about 100 μm.When the WC content is lower than 25wt.%,the brazing coating has better wettability on the steel substrate.The internal denseness of the coating stays in high level.Meanwhile,the minimum porosity in the composite coating can be kept at 1.08%.

brazingcomposite coatingnickel/tungsten carbide interfaceinterface microstructurewettability

王星星、田家豪、武胜金、康克家、凌自成、杜全斌、温国栋

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华北水利水电大学,郑州, 450045

河南机电职业学院,郑州, 451191

西安科技大学,西安, 710054

钎焊 复合涂层 WC增强镍基钎料 界面组织 润湿性

国家自然科学基金项目国家自然科学基金项目河南省高校科技创新人才支持计划河南省高层次人才特殊支持"中原英才计划-中原青年拔尖人才"计划河南省超硬材料智能制造装备集成重点实验室开放课题龙门实验室开放课题

520711655170515122HASTIT026JDKJ2022-02LMQYTSKT016

2024

10.12073/j.hjxb.20221025002

焊接学报
中国机械工程学会　中国机械工程学会焊接学会　机械科学研究院哈尔滨焊接研究所

焊接学报

CSTPCD北大核心
影响因子：0.815
ISSN：0253-360X
年,卷(期)：2024.45(1)
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