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采用原位合成技术制备了碳化钛颗粒增强高锰钢复合材料;采用洛氏硬度计、扫描电镜和金相显微镜探讨了烧结温度和含碳量对该复合材料孔隙度和硬度的影响。结果表明:当烧结温度为1350～1420℃时,该复合材料的孔隙度随烧结温度的升高而减小。当烧结温度超过1420℃,该复合材料的孔隙度随着温度的升高而增大;该复合材料的硬度随温度的变化趋势与孔隙度刚好相反,当烧结温度一定时,该复合材料的孔隙度随碳含量的增加而增大,而其硬度变化与含碳量之间没有明显规律性。
The in-situ synthesis technology was used to prepare titanium carbide particle reinforced high manganese steel composites. The effects of sintering temperature and carbon content on the porosity and hardness of the composites were investigated by Rockwell hardness tester, scanning electron microscope and metallographic microscope. The results show that when the sintering temperature is 1350-1420 ℃, the porosity of the composites decreases with the increase of sintering temperature. When the sintering temperature exceeds 1420 ℃, the porosity of the composites increases with increasing temperature. The hardness of the composites changes with the temperature just opposite to the porosity. When the sintering temperature is constant, the porosity of the composites Degree increases with the increase of carbon content, but there is no obvious regularity between hardness change and carbon content.