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采用3D打印+压力浸渗技术成功制备了陶瓷颗粒增强钢基复合材料(MMCs)/钢三维互穿网络复合材料(3DMMCs/steel),其中MMCs区呈相连的球状,与纯基体区在空间呈三维互穿结构,MMCs区中均匀分布着ZrO2增韧Al2O3颗粒(ZTAp),MMCs区基体和纯基体区都为40Cr钢。研究了该复合材料的微观组织特征和冲击磨料磨损性能,并与常规增强颗粒均匀分散的ZTAp/40Cr复合材料进行了对比。三维互穿网络复合材料结构完整,界面结合良好,其冲击磨料磨损性能高于常规复合材料,磨损率比常规复合材料降低了31.24%。
The 3D particle-reinforced MMCs / 3D interpenetrating network composites (3DMMCs / steel) were successfully prepared by 3D printing and pressure impregnation technology. The MMCs were spherical in shape and spatially separated from the pure matrix In the three-dimensional interpenetrating structure, ZrO2 toughened Al2O3 particles (ZTAp) are evenly distributed in the MMCs. The matrix and pure matrix of the MMCs are all 40Cr steel. The microstructure characteristics and impact abrasive wear properties of the composites were studied and compared with the ZTAp / 40Cr composites with uniform dispersion of conventional reinforcing particles. The three-dimensional interpenetrating network composites have a complete structure and good interfacial bonding. The wear properties of the three-dimensional interpenetrating network composites are higher than that of the conventional composites, and the wear rate is reduced by 31.24% compared with that of the conventional composites.