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研究了在合金总量约4%的Cr-Mn合金中,碳对淬透性和耐磨性的影响。测定了不同含碳量合宜的CCT曲线,根据不同含碳量合金半冷却时间与硬度关系曲线,以及不同冷速下含碳量与硬度关系,确定含碳0.45～0.55%合金具有良好淬透性和淬硬性的综合。组织分析指出,0.45～0.55%C合金可在一定冷速范围获得M/B组织,从而提供了良好的综合性能。销盘磨损试验得出,小尺寸试样的耐磨性随含碳量增加而提高,而大尺寸工件,0.45～0.55%C合金可保证获得较高耐磨性。
The effect of carbon on hardenability and wear resistance in Cr-Mn alloys with a total alloy content of about 4% was investigated. The appropriate CCT curves for different carbon contents were determined. According to the relationship between the half-cooling time and hardness of the alloy with different carbon content and the relationship between the carbon content and the hardness at different cooling rates, the alloy with 0.45-0.55% carbon was found to have good hardenability And hardenability of the integrated. Tissue analysis indicates that 0.45 ~ 0.55% C alloy can obtain M / B structure at a certain cooling rate range, thus providing good overall performance. Pin plate wear test shows that the wear resistance of small size samples with the increase of carbon content increased, while the large size of the workpiece, 0.45 ~ 0.55% C alloy can ensure higher wear resistance.