引用本文:马臣， 马春力 ， 李慕勤， 王正兴， 孙昭藩.CO2气体保护药芯焊丝喷粉堆焊层组织及其耐磨性[J].中国表面工程,2012,25(2):115~119
MA Chen, MA Chunli, LI Muqin, WANG Zhengxing, SUN Zhaofan.Microstructure and Wear Resistance of Surfacing Layer Shielded by CO2 with Spraying Powder[J].China Surface Engineering,2012,25(2):115~119
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CO2气体保护药芯焊丝喷粉堆焊层组织及其耐磨性
马臣， 马春力 ， 李慕勤， 王正兴， 孙昭藩1,2
1. 佳木斯大学 教育部金属耐磨材料及表面技术工程研究中心, 黑龙江 佳木斯 154007;2. 华能鹤岗发电有限公司， 黑龙江 鹤岗 154109
摘要:
采用CO2气体保护焊方法，使用高铬铸铁药芯焊丝，喷射优化设计的CrTiMnB系粉体形成耐磨堆焊层。利用XRD及金相显微镜分析堆焊层组织结构，并测定堆焊层的硬度和磨损性能。结果表明：与单纯高铬铸铁芯堆焊层相比，喷射粉体后堆焊层的洛氏硬度HRC增加，当Mn铁、Cr铁、B铁、Ti铁质量分数比为4.3∶52.2∶3.9∶39.6时，堆焊层硬度和耐磨性最高。喷射粉体堆焊层以马氏体为主，并有(Cr,Fe)7C3, FeMn2等相产生，从而提高堆焊层硬度和耐磨性。
关键词:  CO2气体保护焊  喷射送粉  复合堆焊  耐磨性
DOI：
分类号:
基金项目:教育部金属耐磨材料及表面技术研究中心基金(E100001)
Microstructure and Wear Resistance of Surfacing Layer Shielded by CO2 with Spraying Powder
MA Chen, MA Chunli, LI Muqin, WANG Zhengxing, SUN Zhaofan1,2
1. Metal Wear Resistance and Surface Technology Engineering Research Center of Ministry of Education, Jiamusi Universtiy, Jiamusi Heilongjiang 154007;2. Huaneng Power Co.Ltd of Hegang, Hegang Heilongjiang 154109
Abstract:
Surfacing welding layer composed of spraying optimized CrTiMnB powder was fabricated by CO2 shielded welding with high ferrochrome fluxcored wire. The structure was characterized by XRD and metallographic microscope. The hardness and wear resistance of surfacing welding layer were tested. The results indicats that HRC of the surfacing welding layer with the powder increases compared with that of single surfacing layer welded by high ferrochrome fluxcored wire. The hardness and wear resistance of the sample composed with the powder of 52.2% Cr, 39.6% Ti, 4.3% Mn and 3.9% B is the best. The main microstructure of the surfacing welding layer powder is martensite, with (Cr,Fe)7C3 and FeMn2 phases detected, which enhance the hardness and wear resistance of surfacing welding layer.
Key words:  CO2 shielded welding  spraying powder  composite surfacing welding  wear resistance
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