真空液相烧结Mo_2FeB_2硬质覆层材料的研究  

RESEARCH ON VACUUM LIQUID PHASE SINTERED Mo_2FeB_2 HARD ALLOY CLADDING MATERIALS

作　　者：李文虎[1] 刘福田[1] 黄巍岭[2] 张英才[3] 董飞[1] 李兆前[2] 

机构地区：[1]济南大学材料科学与工程学院,山东济南250022 [2]山东大学机械工程学院,山东济南250061 [3]济南钢铁集团总公司技术中心,山东济南250101

出　　处：《粉末冶金工业》2006年第5期24-28,共5页Powder Metallurgy Industry

基　　金：国家自然科学基金项目(59975054)

摘　　要：应用真空液相烧结法在Q235钢基体表面制得了Mo2FeB2硬质覆层，并对其进行了硬度测试、弯曲强度试验与耐腐蚀性试验。结果表明，在1200～1220℃进行烧结，覆层维氏硬度达到13170MPa（1317kgf／mm^2），弯曲强度达到1168．21MPa，并且具有较好的耐腐蚀性。采用扫描电镜观察了硬质覆层材料及其界面的微观组织结构，发现硬质覆层内部组织结构致密，覆层与钢基体之间形成了一个具有一定厚度的过渡层，并且两相之间形成了良好的结合界面。并对覆层的断口形貌进行了观察分析。Mo2FeB2 hard cladding material was prepared on Q235 steel by vacuum liquid phase sintering. The mechanical properties of the cladding, including bending strength, vickers hardness and corrosion resistance were tested. It was shown that vickers hardness of cladding was 13170MPa , bending strength was about 1168.21 MPa and corrosion resistance was satisfactory when the cladding was sintered between 1200- 1220 ℃. The microstructure and chemical composition of the cladding and the bonding interface were investigated by SEM. The structure of cladding was compact. No clear bonding interface could be observed between cladding and steel substrate,but a transitional layer of certain thickness and has a firm metallurgical bond between cladding and steel substrate was formed. The fracture morphology of cladding was investigated.

关 键 词：硬质覆层 液相烧结 力学性能 

分 类 号：TG174[金属学及工艺—金属表面处理]