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首页> 外文期刊>Journal of Materials Engineering and Performance >Investigations on Heat Treatment of a High-Speed Steel Roll
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Investigations on Heat Treatment of a High-Speed Steel Roll

机译：高速钢辊的热处理研究

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摘要

High-carbon high-speed steels (HSS) are very abrasion-resistant materials primarily due to their high hardness MC-type carbide and high hardness martensitic matrix. The effects of quenching and tempering treatment on the microstructure, mechanical properties, and abrasion resistance of centrifugal casting high-carbon HSS roll were studied. Different microstructures and mechanical properties were obtained after the quenching and tempering temperatures of HSS roll were changed. With air-cooling and sodium silicate solution cooling, when the austenitizing temperature reaches 1273 K, the metallic matrix all transforms into the martensite. Afterwards, the eutectic carbides dissolve into the metallic matrix and their continuous network distribution changes into the broken network. The second hardening temperature of high-carbon HSS roll is around 793 K. No significant changes in tensile strength and elongation percentage are observed unless the tempering temperature is beyond 753 K. The tensile strength increases obviously and the elongation percentage decreases slightly beyond 753 K. However, the tensile strength decreases and the elongation percentage increases when the tempering temperature exceeds 813 K. When the tempering temperature excels 773 K, the impact toughness has a slight decrease. Tempering at 793-813 K, high-carbon HSS roll presents excellent abrasion resistance.
机译：高碳高速钢（HSS）是非常耐磨的材料，主要是因为它们具有高硬度的MC型碳化物和高硬度的马氏体基体。研究了淬火和回火处理对离心铸造高碳高速钢辊的组织，力学性能和耐磨性的影响。改变高速钢辊的淬火和回火温度后，获得了不同的组织和力学性能。通过空气冷却和硅酸钠溶液冷却，当奥氏体化温度达到1273 K时，金属基体全部转变为马氏体。然后，共晶碳化物溶解到金属基体中，并且它们的连续网络分布改变为断裂网络。高碳HSS轧辊的第二次硬化温度约为793K。除非回火温度超过753 K，否则拉伸强度和延伸率均无明显变化。超过753 K时，抗拉强度明显提高，延伸率略有下降。然而，当回火温度超过813K时，抗拉强度降低并且伸长率增加。当回火温度超过773K时，冲击韧性稍微降低。高碳HSS辊在793-813 K上回火，具有出色的耐磨性。

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