煤化工设备耐磨层堆焊材料及工艺  

Hardfacing materials and process for wear resistant layer of coal chemical equipment

作　　者：张金深 李辉 武爱兵 Zhang Jinshen;Li Hui;Wu Aibing(Sinopec Ningbo Engineering Co.,Ltd.,Ningbo 315207,Zhejiang,China;SEG Luoyang R&D Center of Technology,Luoyang 471003,Henan,China)

机构地区：[1]中石化宁波工程有限公司,浙江宁波315207 [2]中石化炼化工程集团洛阳技术研发中心,河南洛阳471003

出　　处：《机械制造文摘（焊接分册）》2020年第6期13-18,共6页Welding Digest of Machinery Manufacturing

摘　　要：采用3种商用堆焊合金材料和3种堆焊工艺分别在Q345R,316L基材上制备9种耐磨层。采用金相显微镜和扫描电子显微镜对堆焊合金的组织和形貌进行表征。利用图像分析软件、洛氏硬度计和摩擦磨损试验机对耐磨层的孔隙率、硬度和耐磨性进行测试。结果表明,堆焊层的孔隙率均在3. 5%以下,大部分在0. 5%以下。碳化物的尺寸、形状、分布和化学成分,以及基体组织决定了堆焊层的耐磨性,HF600焊接材料+GMAW工艺制备的试样具有最好的耐磨性。Nine kinds of wear-resistant layers were prepared on Q345 R and 316 L substrates by three different hardfacing processes with three commercial hardfacing alloy materials. Microstructure and morphology of the hardfacing alloy were characterized by optical microscope and scanning electron microscope. The porosity,hardness and wear resistance of wear layer were tested by image analysis software,rockwell hardness tester and friction and wear testing machine. The results showed that the porosity of hardfacing layer was below 3. 5%,most were under0. 5%. The wear resistance of hardfacing layer was determined by the size,shape,distribution and chemical composition of the carbides,as well as by the matrix microstructure. The best wear resistance was obtained in HF600 hardfacing alloys and GMAW( Gas metal arc welding) process samples.

关 键 词：煤化工设备 堆焊 耐磨层 组织 

分 类 号：TG455[金属学及工艺—焊接]