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结合我国资源特点,以45钢、钛铁、生铁等为主要原料,研究了在大气环境下采用原位反应铸造法制备Ti(C,N)颗粒增强铁基复合材料的工艺方法。结果表明,利用中频感应电炉熔炼合金,通过向铁液中添加含氮附加物原位反应铸造法制备Ti(C,N)颗粒增强铁基复合材料的技术是可行的;复合材料组织由细粒状珠光体加上针状珠光体基体和Ti(C,N)增强颗粒组成;材料铸态综合力学性能得到了最优的组合:抗弯强度1 532.67 MPa,洛氏硬度58.5 HRC,冲击韧度7.18 J/cm2。
Based on the characteristics of China’s resources, 45 steel, ferrotitanium and pig iron were taken as the main raw materials to study the technological process of Ti (C, N) particles reinforced iron matrix composites prepared by in situ reactive casting under atmospheric environment. The results show that it is feasible to make Ti (C, N) particles reinforced iron matrix composites by in-situ reactive casting with adding nitrogenous additive to molten iron by means of medium frequency induction electric furnace smelting alloy. The composite structure consists of fine granular Pearlite and acicular pearlite matrix and Ti (C, N) reinforced particles. The optimal combination of mechanical properties of as-cast material was obtained: flexural strength of 1 532.67 MPa, Rockwell hardness of 58.5 HRC and impact toughness of 7.18 J / cm2.