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IMPROVING MECHANICAL PROPERTIES IN AN ULTRAHIGH CARBON STEEL THROUGH HEAT TREATMENT

机译：通过热处理改善超高碳钢中的机械性能

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An industrial heat treatment for a pearlitic ultrahigh carbon steel has been found to have a positive effect on hardness and toughness. Hardness is enhanced through refinement of pearlite lath spacing, and toughness is affected by modifying the connectivity of the carbide network which extends throughout the microstructure and aids crack initiation and propagation. Carbide network break-up is achieved during the heat treatment at least in part by the extensive homogenous precipitation of discrete equiaxed carbides-apparently idiomorphic-in the microstructure, significantly decreasing the volume fraction of the network. The effects of the heat treatment have been studied using scanning electron microscopy and in situ confocal scanning laser microscopy in order to quantify pearlite refinement and network break-up, and to better understand the kinetics of nucleation and growth of idiomorphic carbides.
机译：已发现珠光体超高碳钢的工业热处理对硬度和韧性产生积极影响。通过细化珠光体板条间距来提高硬度，通过改变碳化物网络的连接来影响整个微观结构的碳化物网络并辅助裂纹启动和传播的韧性来影响韧性。在热处理过程中至少部分地通过离散等碳化物的广泛均匀沉淀 - 显而易见的微观结构，显着降低了网络的体积分数期间在热处理期间实现了碳化物网络分发。已经研究了使用扫描电子显微镜和原位共聚焦扫描激光显微镜研究了热处理的影响，以定量珠光体改进和网络分手，并更好地理解成核碳化物的成核和生长的动力学。

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