氮弧焊原位合成硬质颗粒对堆焊熔敷层的影响  

Effect of in-situ hard particles synthesized by nitrogen arc weldingon surfacinglayer

作　　者：籍鹏飞[1] 王国平[1] JI Peng-fei;WANG Guo-ping(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,Anhui,China)

机构地区：[1]合肥工业大学材料科学与工程学院

出　　处：《金属功能材料》2018年第5期24-28,共5页Metallic Functional Materials

基　　金：合肥工业大学2017年省级大学生创新创业训练计划项目资助(2017CXCYS036)

摘　　要：向一种新型Fe-Cr-C系堆焊粉芯中分别添加不同含量硼、钒元素,并在氮气作为主要保护气的条件下在Q235基体上制备熔敷层。用金相显微镜对熔敷层组织进行了观察,测定熔敷后试样的显微硬度并进行了分析。结果表明,熔敷层中析出硬质氮化物,添加硼元素后析出一定量硬质相导致熔敷层硬度进一步增加,随着硼元素含量增加,硬质相数量增加并逐渐聚集;加入钒元素后,析出相更加细小且分布均匀,随着钒元素含量增加析出相数量变化不大,熔敷组织硬度提升不明显。Different boron content and vanadium content were added to a new Fe-Cr-C system surfacing powder core,and deposited layer on Q235 substrate was prepared under the condition of nitrogen as the main protective gas.The microstructure of the deposited layer was observed by metallographic microscope,and the hardness of the sample after melting was measured and analyzed.The results showed the precipitation of hard nitrides,the hardness of cladding layer was further increased after adding boron.With the increase of boron content,the number of hard phase gradually increased.The precipitation was finer and more uniform distribution,with the content of vanadium increased,the change of the number of precipitated phase and the change of hardness is not obvious.

关 键 词：堆焊合金 钨极氮弧焊 合金成分 组织性能 

分 类 号：TG455[金属学及工艺—焊接]