铁-碳-铬-钒-钛系药芯焊丝堆焊层的显微组织及耐磨性能
Microstructure and Wear Resistance of Fe-C-Cr-V-Ti Flux-Cored Wire Surfacing Layers
摘 要
采用新型铁-碳-铬-钒-钛系药芯焊丝和埋弧焊方法制备出含有初生M7C3相的堆焊层,借助光学显微镜、扫描电镜和X射线衍射仪等研究了堆焊层的显微组织及碳化物的分布、形貌,并对其进行了磨粒磨损试验.结果表明:堆焊层的显微组织由马氏体+铁素体+残余奥氏体+M7C3+M3C+VC等组成,当碳含量为1.45%和2.05%时,尺寸为10～25 μm的初生M7C3相数量较多;初生M7C3相的数量和尺寸对堆焊层耐磨性能影响显著,其磨损机制以磨粒的显微切削为主.
显微组织
初生相
堆焊
药芯焊丝
wear resistance
microstructure
primary phase
surfacing
flux-cored wire
Abstract
A new type Fe-C-Cr-V-Ti flux-cored wire was used to prepared the surfacing layer containing primary M7C3 phase by submerged arc welding method.The microstructure and carbide distribution,morphology of the surfacing layer were investigated by means of optical microscope,scanning electron microscope and X-ray diffraction.The abrasive wear tests were performed.The results show that the microstructure of the surfacing layer was composed of martensite,ferrite,residual austenite ,M7C3,M3C and VC.When the carbon concentration was 1.45wt% and 2.05wt%,the amount of the primary M7C3 phase with the size of 10-25 μm was the most.The effects of the amount and size of the primary M7C3 phase on the wear resistance of the surfacing layer were significant,and the main wear mechanism was the micro-cutting of abrasive particles.
中图分类号 TG422.1
所属栏目 新材料 新工艺
基金项目 湖南省科技攻关计划资助项目(2006GK3087);湘潭大学科研启动基金资助项目(06QDZ05)
收稿日期 2009/10/25
修改稿日期 2010/6/10
网络出版日期
作者单位点击查看
备注龚建勋(1973-),男,湖北崇阳人,副教授,博士.
引用该论文: GONG Jian-xun,LI Dan,XIAO Yi-feng. Microstructure and Wear Resistance of Fe-C-Cr-V-Ti Flux-Cored Wire Surfacing Layers[J]. Materials for mechancial engineering, 2010, 34(11): 42～45
龚建勋,李丹,肖逸锋. 铁-碳-铬-钒-钛系药芯焊丝堆焊层的显微组织及耐磨性能[J]. 机械工程材料, 2010, 34(11): 42～45
被引情况:
【1】龚建勋,许继青,路德斌,吴慧剑, "TiC颗粒对铁-碳-铬-硅合金堆焊层显微组织及耐磨性的影响",机械工程材料 39, 43-47(2015)
【2】山红伟, "铌含量对铁-铬-碳系合金碳弧堆焊层组织和耐磨性能的影响",机械工程材料 40, 35-38(2016)
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参考文献
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【3】FAN C,CHEN Ming-che,CHANG Chia-ming,et al.Microstructure change caused by (Cr,Fe)23C6 carbides in high chromium Fe-Cr-C hardfacing alloys[J].Surface & Coatings Technology,2006,201(3):908-912.
【4】BUYTOZ S,MUSTAFA M,YILDIRIM,et al.Microstructural and microhardness characteristics of gas tungsten arc synthesized Fe-Cr-C coating on AISI 4340[J].Materials Letters,2005,59(6):607-614.
【5】LEE S,CHOO S H,BAEK E R,et al.Correlation of microstructure and fracture toughness in high-chromium white iron hardfacing alloys[J].Metallurgical and Materials Transactions A,1996,27(12):1996-3881.
【6】CHATTERJEE S,PAL T K.Weld procedural effect on the performance of iron based hardfacing deposits on cast iron substrate[J].Journal of Materials Processing Technology,2006,173(1):61-69.
【7】KIM C K,LEE S,JUNG J Y,et al.Effects of complex carbide fraction on high-temperature wear properties of hardfacing alloys reinforced with complex carbides[J].Materials Science and Engineering A,2003,349(1):1-11.
【8】BRANAGAN D J,MARSHALL M C,MEACHAM B E.High toughness high hardness iron based PTAW weld materials[J].Materials Science and Engineering A,2006,428(1):116-123.
【9】DOGAN N,HAWK J A,TYLCZAK J H.Wear of cast chromium steels with TiC reinforcement[J].Wear,2001,250(12):462-469.
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