采用等离子堆焊—SiC后送粉技术制备了SiC颗粒增强铁基合金复合涂层,利用扫描电子显微镜（SEM）、X射线衍射仪（XRD）和能谱仪（EDS）对涂层的显微组织、相组成和元素分布进行了观察和测试。试验结果表明：SiC分布于马氏体基体上,原始形态保持完好,没有发生明显溶解,复合效果较好。SiC与基体界面层由预覆层、近基体区和絮状区构成。SiC边缘为CrSi2、CrSi3;近基体区耐腐蚀性相对基体较强,组织难以显示;絮状区由大量（Fe,Cr）7 C3、（Fe,Cr）23 C6碳化物和α-（Fe,Cr）固溶体组成。
Iron-based alloy coating reinforced by precoated SiC particles was prepared by plasma surfacing process with SiC back-feeding model.SEM,XRD and EDS were used to analyse microstructure,phases and elemental distribution of the coating.The results show that the precoated SiC particles were not dissolved significantly.They retained original shape in martensitic matrix.The interface layer between SiC particles and the matrix can be divided into precoated film,near-matrix region and cotton-like region.The precoated film contains CrSi2 and CrSi3.The microstructure in the near-matrix region isn＇t easy to be indentified because of its excellent corrosion resistance.Whereas,the microstructure of the cotton-like region can be seen obviously by SEM,which is consists of α-（Fe,Cr） solid solution and a large amount of（Fe,Cr）7C3 and（Fe,Cr）23C6 carbides dispersing between α-（Fe,Cr） phase.
参考文献
| [1] | Anandkumar R;Almeida A;Colaco R;Vilar R;Ocelik V;De Hosson JTM .Microstructure and wear studies of laser clad Al-Si/SiC(p) composite coatings[J].Surface & Coatings Technology,2007(24):9497-9505. |
| [2] | Y.T. Pei;V. Ocelik;J.Th.M. De Hosson .SiC_P/Ti6Al4V functionally graded materials produced by laser melt injection[J].Acta materialia,2002(8):2035-2051. |
| [3] | Jyotsna Dutta Majumdar;Ajeet Kumar;Lin Li .Direct laser cladding of SiC dispersed AISI 316L stainless steel[J].Tribology International,2009(5):750-753. |
| [4] | JYOTSNA DUTTA MAJUMDAR;LIN LI .Studies on Direct Laser Cladding of SiC Dispersed AISI 316L Stainless Steel[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2009(12):3001-3008. |
| [5] | G. Abbas;U. Ghazanfar .Two-body abrasive wear studies of laser produced stainless steel and stainless steel + SiC composite clads[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2005(1/4):258-264. |
| [6] | Guo MH;Liu AG;Zhao MH;Hu HL;Wang ZI .Microstructure and wear resistance of low carbon steel surface strengthened by plasma melt injection of SiC particles[J].Surface & Coatings Technology,2008(16):4041-4046. |
| [7] | Tang W M;Zheng Z X;Ding H F et al.The interfacial stability of the coated-SiC/Fe couple[J].Materials Chemistry and Physics,2002,77:236241. |
| [8] | 汤文明,郑治祥,丁厚福,金志浩.SiC/金属界面固相反应与控制的研究进展[J].硅酸盐学报,2003(03):283-291. |
| [9] | A.B.Kloosterman;B.J.Kool;J.Th.M.Hosson .Electron microscopy of reaction layers between SiC and Ti-6Al-4V after laser embedding[J].Acta materialia,1998(17):6205-6217. |
| [10] | 胡赓详;蔡珣.材料科学基础[M].上海:上海交通大学出版社,2000:136-140. |
| [11] | Chang C M;Lin C M;Hsieh C C et al.Microstructural characteristics of Fe-40 wt% Cr-xC hardfacing alloys with [1.0-4.0 wt%]carbon content[J].Journal of Alloys and Compounds,2009,487:83-89. |
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