| 高硬度高耐磨自保护金属芯堆焊焊丝 |
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| 引用本文： | 蒋旻,栗卓新,蒋建敏,史耀武.高硬度高耐磨自保护金属芯堆焊焊丝[J].焊接学报,2006,27(1):69-71. |
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| 作者姓名： | 蒋旻 栗卓新 蒋建敏 史耀武 |
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| 作者单位： | 北京工业大学,材料科学与工程学院,北京,100022 |
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| 摘 要： | 研制一种焊接工艺性能良好的高铬铸铁型自保护金属芯堆焊焊丝,堆焊层硬度大于60HRC,耐磨性为Q235钢的21倍.对其自保护机理进行了研究,当粉芯中金属Mn含量达到5%时,可保证焊缝表面不出现气孔,当钛铁含量超过10%时,焊缝表面出现压坑.堆焊层显微组织为马氏体 残余奥氏体,在马氏体基体上均匀分布着M7C3型耐磨硬质相.
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| 关 键 词： | 高硬度 高耐磨 自保护金属芯堆焊焊丝 |
| 文章编号： | 0253-360X（2006）01-69-03 |
| 收稿时间： | 2004-11-25 |
| 修稿时间： | 2004-11-25 |
Self-shielded metal cored wire for hardfacing with high hardness and abrasion resistance |
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| JIANG Min,LI Zhuo-xin,JIANG Jian-min and SHI Yao-wu.Self-shielded metal cored wire for hardfacing with high hardness and abrasion resistance[J].Transactions of The China Welding Institution,2006,27(1):69-71. |
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| Authors: | JIANG Min LI Zhuo-xin JIANG Jian-min and SHI Yao-wu |
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| Affiliation: | School of Material and Engineering, Beijing University of Technology, Beijing 100022, China,School of Material and Engineering, Beijing University of Technology, Beijing 100022, China,School of Material and Engineering, Beijing University of Technology, Beijing 100022, China and School of Material and Engineering, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | The high-chromium cast iron type self-shielded metal cored wire(SSMCW)for hardfacing with good operative performance and appearance was developed.The hardness of deposited metal exceeds HRC60,and the wearing resistance is 21 times higher than that of Q235 steel.The mechanism of selfshielding was researched.When manganese content arrives at 5wt% in wire,porosity can be avoided,while TiFe content exceeds 10wt%,pits will appear in the weld of SSMCW.The microstructure of deposited metal consists of martensite and a little residual austenite,and the abrasive resistant hard phase M_7C_3 distributes uniformly in martensite matrix. |
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| Keywords: | high hardness high abrasion resistance self-shielded metal cored wire for hardfacing |
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