采用药芯焊丝气体保护堆焊方法制备Fe-Cr-B-C堆焊合金,利用金相、SEM、XRD等方法,分析了不同硼含量对堆焊合金组织及硼化物形貌的影响.结果表明:Fe-12Cr-xB-0.1C合金的显微组织由铁素体+奥氏体+(Fe,Cr)2B+ (Fe,Cr)23(B,C)6组成.当硼含量＜3％(质量分数,下同)时,随着硼含量增加,硼化物形态逐渐由断续网状转变为网状;当硼含量≥3％时,随着硼含量增加,初生块状(Fe,Cr)2B数量逐渐增加,其尺寸和分布更均匀,硼化物主要呈块状、条状、鱼骨状、蜂窝状及菊花状分布.初晶(Fe,Cr)2B近似呈四边形柱状体,趋向垂直于堆焊层表面生长.当硼含量≤4％时,硼的增加能显著提高Fe-Cr-B-C堆焊合金的硬度及耐磨性.
参考文献
| [1] | M. F. Buchely;J. C. Gutierrez;L. M. Leon;A. Toro .The effect of microstructure on abrasive wear of hardfacing alloys[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2005(1):52-61. |
| [2] | WANG Z H;WANG Q B;CUI L .Influence of cooling rate and composition on orientation of primary carbides of Fe Cr C hardfacing alloys[J].SCIENCE AND TECHNOLOGY OF WELDING AND JOINING,2008,13(07):656-672. |
| [3] | Lu LM.;Soda H.;McLean A. .Microstructure and mechanical properties of Fe-Cr-C eutectic composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):214-222. |
| [4] | Ji Hui Kim;Hyun Seon Hong;Seon Jin Kim .Effect of boron addition on the cavitation erosion resistance of Fe-based hardfacing alloy[J].Materials Letters,2007(4/5):1235-1237. |
| [5] | D. K. Dwivedi .Microstructure and abrasive wear behaviour of iron base hardfacing[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2004(10):1326-1330. |
| [6] | 王智慧,贺定勇,王月琴.硼对Fe-Cr-C耐磨堆焊合金组织的影响[J].材料工程,2001(10):18-20. |
| [7] | F. Scandella;R. Scandella .Development of hardfacing material in Fe-Cr-Nb-C system for use under highly abrasive conditions[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2004(1):93-105. |
| [8] | 叶荣昌.硼对堆焊合金组织与性能的影响[J].热加工工艺,1998(03):19. |
| [9] | LIU Zhong-li,CHEN Xiang,LI Yan-xiang,HU Kai-hua.High Boron Iron-Based Alloy and Its Modification[J].钢铁研究学报（英文版）,2009(03):37-42,54. |
| [10] | 龚建勋,李丹,肖逸锋,张清辉.Fe-Cr-B-C堆焊合金的显微组织及耐磨性[J].材料热处理学报,2010(03):136-141. |
| [11] | Guo CQ.;Kelly PM. .Boron solubility in Fe-Cr-B cast irons[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):40-45. |
| [12] | BERNS H;FISCHER A .Microstructure of Fe-CP-C hardfacing alloys with additions of Nb,Ti and B[J].Materials Characterization,1997,39(02):499-527. |
| [13] | Fan C;Chen MC;Chang CM;Wu WT .Microstructure change caused by (Cr,Fe)(23)C-6 carbides in high chromium Fe-Cr-C hardfacing alloys[J].Surface & Coatings Technology,2006(3/4):908-912. |
| [14] | Ji Hui Kim;Kang Hee Ko;Seung Dae Noh;Gyung Guk Kim;Seon Jin Kim .The effect of boron on the abrasive wear behavior of austenitic Fe-based hardfacing alloys[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2009(9/10):1415-1419. |
| [15] | JANKANSKAS V;KREIVAITIS R;MILCIUS D et al.Analysis of abrasive wear performance of arc welded hard layers[J].WEAR,2008,265(11-12):1026-1032. |
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