原位生成TiCP-Fe表面梯度复合材料组织及形成机理研究
Research on Tissue and Formation Mechanism Of TiC Particles Reinforced Iron Matrix Surface Gradient Composite by In-situ Technology
王亮亮，许云华，钟黎声，魏忠斌
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作者单位：西安建筑科技大学 机电工程学院，陕西西安 710055
中文关键字：原位反应，TiC，梯度复合材料
英文关键字：In-situ Synthesized, TiC, Gradient Composite
中文摘要：摘要：本实验利用了铸造—热处理工艺[1]原位反应生成了TiC颗粒增强铁基表面梯度复合材料，对该复合材料组织进行了研究，并深刻剖析了该复合材料组织的形成机理。实验结果表明：原位合成的TiC增强表面梯度复合材料大致分为三层；每层之间最大的区别就是生成的TiC颗粒的大小及形状不相同。远离基体侧的反应层接近于大块状的TiC，显然是颗粒基本上没有扩散；反应层与基体结合界面良好、无间隙，结合层TiC颗粒平均大小约为2-4μm。因此，各梯度层TiC颗粒大小的不同决定了此种复合材料不同层具有不同的硬度、冲击性能、韧性、抗拉强度、耐磨性等。
英文摘要：Abstract:The experiment created TiC particles reinforced iron matrix surface gradient composite by in-situ technology which used the technology for casting and heating processing.The experiment researched the organization of composite materials,and analyzed the formation mechanism of the organization of composite materials deeply. The experimental results show that the TiC reinforced surface gradient composite in-situ synthesized was about divided into three layers.The largest differences between each layer were the different size and shape of TiC particles.The reaction layer far away from iron matrix were nearly the block titanium carbon.Apparently,the particles didn’t mainly have diffused.The interface is better between reaction layer and matrix,and no gap.The average size of titanium carbon of combined layer particles was about 2-4μm. Consequently,the different size between the titanium carbon particles in every gradient layers decided that this composite in different layers have different hardness,shock property, toughness, tenacity intensity, wear resistant,and so on.