用V-EPC法制备表面耐磨铸铁的组织与性能研究  

Study on the Microstructures and Resistance of Wear Resistant Surface Cast Iron by V-EPC

作　　者：高红霞[1] 商全义[2] 刘建秀[1] 杨改云[1] 

机构地区：[1]郑州轻工业学院机电工程学院,河南郑州450002 [2]中原工学院材料与化工系,河南郑州450007

出　　处：《铸造》2006年第10期1040-1042,共3页Foundry

基　　金：河南省高校杰出科研人才创新工程项目(编号:2005KYCX004);河南省教育厅自然科学研究项目(编号:200510462004)

摘　　要：采用真空实型铸造(V-EPC)法,在聚苯乙烯(EPS)泡沫模表面涂刷料浆,浇注后铁液渗入料浆涂层,得到表面耐磨铸铁。料浆主要组成为SiC粉、EPS颗粒、Cr-Fe粉、助渗剂、粘结剂等。研究发现,耐磨铸铁表层组织中石墨尺寸小于基体中石墨,表层中硬质颗粒SiC与基体冶金结合且分布均匀。磨粒磨损试验结果表明,耐磨铸铁表层的磨损量是基体铸铁的37%。通过对表面层的组织结构分析探讨了表面渗层耐磨性较高的原因。Using vacuum-evaporative pattern casting （V-EPC） technology, the wear resistant surface cast iron can be gained by dipping the EPS model with the slime, casting and infiltrating the liquid iron to the slime layer. The main ingredients of the slime were SiC powder, EPS powder, Cr-Fe powder, auxiliary infiltration agent and binder, etc. The research shows that the graphite figure of surface layer was smaller than it of matrix and the SiC granule of surface layer was metallurgy coalescent with the matrix and the SiC granule was well-proportioned spread around. The test result of grit wearing machine shows that the wear amount of the surface layer was 37% that of the matrix iron. The causes that the wear resistance of surface infiltration layer was better were searched by microstructures analysis.

关 键 词：铸铁 V—EPC 铸渗 耐磨性 组织 

分 类 号：TG113[金属学及工艺—物理冶金]