层间温度对ZTA/高铬铸铁复合材料界面结合性的影响

层间温度对ZTA/高铬铸铁复合材料界面结合性的影响 Effect of interlayer temperature on interfacial bonding of ZTA/high chromium cast iron composites 韩佳源 HAN Jiayuan 1 first-author 焦云征 JIAO Yunzheng 2 黄智泉 HUANG Zhiquan 1 郑州机械研究所有限公司 郑州机械研究所有限公司 Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd. Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd. 唐山冀东机电设备有限公司 唐山冀东机电设备有限公司 Tangshan Jidong Electromechanical Equipment Co.,Ltd. Tangshan Jidong Electromechanical Equipment Co.,Ltd. 选用自主研发的高铬铸铁型明弧自保护药芯焊丝在ZTA增强高铬铸铁基复合材料试块上进行不同层温的堆焊实验。利用体式显微镜、光学显微镜和扫描电镜对熔敷金属及复合材料进行组织与界面观察,并用定量金相法对熔敷金属碳化物体积百分数进行统计。结果表明:不同层温下熔敷金属均为典型的高铬铸铁组织,其组织由初生碳化物、共晶莱氏体、马氏体以及残余奥氏体组成,随着层间温度的降低,碳化物体积百分数逐渐升高,在层温为30 ℃时熔敷金属碳化物体积百分数可达55.17%。层间温度越低,焊接时产生的应力通过应力释放裂纹越细密均匀,层温30 ℃时,ZTA颗粒未见裂纹以及界面剥离的情况,适用于复合材料的堆焊。 High chromium cast iron core welding wire was selected to carry out surfacing experiments with different layer temperatures on the ZTA reinforced high chromium cast iron base composite test block. The microstructure and interface of deposited metal and composites were observed by bulk microscope,optical microscope and scanning electron microscope,and the volume percentage of deposited metal carbide was counted by quantitative gold phase method. The results show that,the deposited metals are typical high chromium cast iron with different layer temperature. The microstructure consists of primary carbide,eutectic ledeburite,martensite and retained austenite. With the decrease of interlayer temperature,the volume percentage of carbide increases gradually,and the volume percentage of deposited metal carbide can reach 55.17% when the layer temperature is 30 ℃. The lower the interlayer temperature is,the more fully the stress is released through the stress release crack. When the layer temperature is 30 ℃,the ZTA particles are not cracked and the interface is stripped,which is suitable for surfacing welding of composite materials. 层间温度 复合材料 界面结构 组织分析 堆焊 TB33 2022-03-08 5 51