采用粉末埋入反应辅助涂覆技术处理后,SiC表面产生由TiC 、Ti5Si3、Ti8C5等组成Ti预涂覆层.通过等离子喷焊技术将经上述预涂覆的SiC颗粒与铁基合金熔覆于工件表面,制备SiC增强铁基合金复合涂层.结果表明:Ti涂覆SiC颗粒增强涂层内颗粒得到保留,受高温作用会发生一定分解,分解产物改变了基体的成分,进而影响基体的结晶模式和组织形态,出现了树枝晶和多边形块状碳化物.Ti涂覆SiC颗粒的颗粒增强作用以及分解产物的产生弥散强化和固溶强化作用,使得复合涂层的平均硬度高于纯铁基涂层,表面的维氏硬度值最高可达961 HV0.2,但SiC颗粒在基体中分布稀疏,颗粒增强效果不明显.
参考文献
| [1] | Lim LC.;Chen ZD.;Ming Q. .Microstructures of laser-clad nickel-based hardfacing alloys[J].Surface & Coatings Technology,1998(2/3):183-192. |
| [2] | Zhao MH;Liu AG;Guo MH;Liu DJ;Wang ZJ;Wang CB .WC reinforced surface metal matrix composite produced by plasma melt injection[J].Surface & Coatings Technology,2006(3/4):1655-1659. |
| [3] | Wu P.;Zhou CZ.;Tang XN. .Microstructural characterization and wear behavior of laser cladded nickel-based and tungsten carbide composite coatings[J].Surface & Coatings Technology,2003(1):84-88. |
| [4] | 于美杰,王成国,孙宏飞,徐勇,朱波.WC增强镍基复合喷焊层的组织与磨粒磨损性能研究[J].材料热处理学报,2006(03):116-120. |
| [5] | 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. |
| [6] | Mohammed Jasim K;Rawlings R D;West D R F .Metal-ceramic functionally gradient material produced by laser processing[J].Journal of Materials Science,1993,28:2820-2826. |
| [7] | Tang WM.;Zheng ZX.;Ding HF.;Jin ZH. .A study of the solid state reaction between silicon carbide and iron[J].Materials Chemistry and Physics,2002(3):258-264. |
| [8] | Pelleg, J .Reactions in the matrix and interface of the Fe-SiC metal matrix composite system[J].Materials Science & Engineering. A, Structural Materials: Properties, Microstructure and Processing,1999(1-2):225-241. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%