成分对铁基表面铸渗SiC颗粒影响研究  

Effect of Iron-bases Composition on Casting Penetration of SiC Particulates

作　　者：杨蕾[1] 马幼平[1] 李秀兰[1] 李泽宇[1] 

机构地区：[1]西安建筑科技大学,陕西西安710055

出　　处：《铸造技术》2012年第12期1415-1417,共3页Foundry Technology

基　　金：西安建筑科技大学校青年科技基金(项目编号:QN1014)

摘　　要：对不同铁基材料进行表面SiC颗粒复合研究。通过对比不同基体中铸渗复合试样的金相组织特征及复合层硬度变化,探讨了优化铁基表面SiC颗粒复合材料制备工艺的方向。结果表明,在钢铁基体上采用铸渗工艺复合SiC颗粒过程中,存在SiC颗粒的分解及C、Si原子扩散过程。基体中高的铬含量使铸渗层生成大量碳化物,抑制了石墨相的生成,并使得铸渗层硬度比基体增长近1倍。基体中高的Si、C含量能抑制SiC颗粒的分解,获得残留SiC颗粒的铸渗层,但是颗粒尺寸大幅度减小且形状由不规则四边形变为近似圆形。The microstructures and hardness of the SiC particle composites on the surface of different iron-based materials were studied. The results show that, there are a decomposition process of SiC particles and a diffusion process of C and Si atoms during casting penetration. The high chromium content in the matrix makes infiltration casting layer generate a large number of carbides, which decrease the flake graphite and increase the hardness of the composite layer. And the high Si and C content in the iron-base may inhibit the decomposition of SiC particles, and get composite layer with SiC particles, but the particle is greatly reduced in size and becomes nearly circular shape from irregular quadrilateral.

关 键 词：铸渗 耐磨 铁基 SIC颗粒 

分 类 号：TG174.45[金属学及工艺—金属表面处理] TB331[金属学及工艺—金属学]