超高含量球形WC颗粒增强熔敷层的制备与组织分析  

Preparation and microstructure analysis of cladded layer strengthened by spherical WC particles with very high volume fraction

作　　者：刘爱国[1] 王晓娟 王微伟 LIU Aiguo;WANG Xiaojuan;WANG Weiwei(Shenyang Ligong University,Shenyang,110159,China;Shanghai Electric Power Generation Equipment Co.Ltd.Turbine Plant,Shanghai,201108,China;Jiangsu Remake Metal Technology Co.Ltd.,Changzhou,213172,China)

机构地区：[1]沈阳理工大学,沈阳110159 [2]上海电气电站设备有限公司上海汽轮机厂,上海201108 [3]江苏瑞米克金属技术有限公司,常州213172

出　　处：《焊接学报》2021年第6期91-96,I0006,共7页Transactions of The China Welding Institution

摘　　要：在预置了NiCrBSi涂层的低碳钢基体上,用氩弧熔敷注射工艺制备了超高体积分数球形WC颗粒增强的熔敷层,对熔敷层的组织进行了分析,测量计算了WC颗粒体积分数,对WC颗粒分解率进行了估计.结果表明,熔敷注射层组织由(Fe,Ni)固溶体、WC颗粒、Fe_(3)W_(3)C、共晶组织构成.WC颗粒在熔敷注射层中分布均匀,体积分数高达68.7%~76.6%,相应的质量分数为79.5%~85.2%.WC颗粒分解率较低,根据显微组织形态估计不高于12.2%,按EDS测量结果估计不高于7.4%.增加预置涂层厚度有助于WC颗粒体积分数的提高和分解率的降低.NiCrBSi coatings of different thicknesses were pre-coated on low carbon steel substrates and melted with an argon arc.Spherical WC particles were injected into the molten pools.Cladded layers with very high volume fraction of WC particles had been produced.Microstructures of the cladded layers were analyzed with scanning electron microscopy.Volume fraction of WC particles were measured and calculated.Dissolution ratio of WC particles was estimated.The results show that,microstructures of the cladded layers consist of(Fe,Ni)solid solution,WC particles,Fe_(3)W_(3)C carbides,and eutectic structures.WC particles are distributed uniformly in the matrix.Volume fractions of WC particles in the cladded layers are as high as 68.7-76.6 vol.%,and the corresponding mass fraction are 79.5-85.2 wt.%.Dissolution ratio of WC particles is very low,estimated as less than 12.2 wt.%based on microstructures,and as less than 7.4 wt.%based on energy dispersion spectrum results.Increase of pre-coatings’thickness benefits increase of volume fraction and decrease of dissolution ratio of WC particles.

关 键 词：熔敷 碳化钨颗粒 体积分数 显微组织 

分 类 号：TG444[金属学及工艺—焊接]