Cr元素含量对C-Cr-Mo-Ni系熔覆层焊材组织及性能的影响  

Effect of Different Cr Element Contents on Microstructure and Property of C-Cr-Mo-Ni Surfacing Cladding Layer

作　　者：冯大鹏[1] 尚长沛[2] 

机构地区：[1]湖北理工学院机电工程学院,湖北黄石435003 [2]河南工业职业技术学院机械工程系,河南南阳473000

出　　处：《热加工工艺》2015年第7期82-84,共3页Hot Working Technology

基　　金：湖北省机械工程重点学科支撑项目(T201408)

摘　　要：配置Cr元素含量不同的C-Cr-Mo-Ni系焊条,通过手工电弧焊工艺在5CrMnMo钢上进行堆焊试验,研究了Cr含量对焊材的显微组织、硬度分布及耐磨性的影响规律。结果表明Cr元素含量不同条件下,显微组织、硬度分布以及耐磨性具有较大的差异,Cr含量在3%~12%范围内,随着Cr含量的升高,显微组织由细小的板条状马氏体逐渐转变为粗大的针状马氏体,显微硬度逐渐升高,耐磨性先升高后降低,当Cr含量为9%时,焊材的耐磨性最高,当Cr含量达到12%时,焊材的耐磨性降低。The manual arc surface welding process on 5CrMnMo steel substrate was taken by different contents of Cr element of C-Cr-Mo-Ni electrodes. The effects of different Cr element contents on the microstructure, hardness distribution and wear resistance of the electrodes were studied. The results show that under the condition of different Cr element contents, the difference of microstructure, hardness distribution and wear resistance is large. When the content of Cr element is in the range of 3%-12%, with the increase of Cr element content, the small plate strip martensite microstructure transforms into rough acicular martensite and the microhardness increases gradually. Meanwhile, the wear resistance increases first and then reduces. When Cr element content is 9%, the wear resistance of the weld material is the highest, and when the Cr element content reaches 12%, the wear resistance of the weld material reduces.

关 键 词：Cr元素含量 显微组织 硬度分布 耐磨性 

分 类 号：TG422[金属学及工艺—焊接]