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分析了铁基体复合SiC陶瓷颗粒的前景,提出改善SiC在铁基中分解的新方法,并在实验室条件下,采用V-EPC法(真空负压实型铸造法)制备了SiCp/高锰钢基复合材料。通过金相分析、扫描电镜(SEM)、能谱仪(EDS)及X射线衍射(XRD)等测试手段,研究了SiC颗粒铸渗高锰钢过程中SiC粒子的分解特征及粒子周围合金元素分布规律。研究结果表明:SiC颗粒分解58.6%以上,残余SiC颗粒分布均匀、形态良好;铬元素的加入一定程度上降低了碳的扩散速率,可抑制组织石墨化;钢中的合金元素锰、铬减弱了SiC分解的驱动力,对有效抑制SiC颗粒分解是有利的。
Based on the analysis of the prospects of the iron matrix composite SiC ceramic particles, a new method to improve the decomposition of SiC in the iron-based was proposed. Under the laboratory conditions, the SiCp / high manganese was prepared by V-EPC method (vacuum negative solid casting) Steel-based composite materials. The disintegration characteristics of SiC particles and the distribution of alloying elements around the particles were studied by means of metallographic analysis, SEM, EDS and XRD. law. The results show that: SiC particles decompose 58.6% or more, the residual SiC particles are evenly distributed and the morphology is good; the addition of chromium element reduces carbon diffusion rate to a certain extent and inhibits the graphitization of the structure; the alloying elements manganese and chromium in the steel decrease The driving force of SiC decomposition is advantageous for effectively inhibiting the decomposition of SiC particles.