Abstract—

It is shown that the wear resistance of graphitized steel under abrasive action and dry sliding friction can be increased by heat treatment that forms an increased content of metastable residual austenite in the steel structure, which undergoes dynamic strain martensitic transformation (DSMT), the self-quenching effect under loading, (SQL). In order to obtain an optimal content of metastable retained austenite (36%) in the structure of graphitized steel along with tempered martensite and graphite, as well as to achieve the highest relative abrasive wear resistance (ε_a = 4.8) and wear resistance in dry sliding friction (ε_dsf = 2.8) than occurs after routine heat treatment (ε_a = 3.5) and (ε_dsf = 2), heating to 950°С is required before quenching. Isothermal quenching, including austenitization at 850°C, cooling in water to an isothermal temperature of 300°C, holding for 10 min at this temperature in a furnace, and a subsequent cooling in air led to a slight increase in the relative abrasive wear resistance (ε_a= 3.8) as compared to the standard heat treatment (ε_a = 3.5). This procedure provides a significantly higher relative wear resistance of graphitized steel under dry sliding friction (ε_dsf = 3.6) than one could provide by routine quenching from a commonly used temperature (ε_dsf = 2), or by quenching from an elevated temperature (ε_dsf = 2.8) together with low-temperature tempering. The use of the proposed treatment procedures for graphitized steel should provide an increase in the durability of tools made of such a material and reduce the costs for purchasing it.

中文翻译：

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通过获得组织中的亚稳态奥氏体来提高石墨化钢的耐磨性

摘要—

结果表明，通过热处理可以提高石墨化钢在磨蚀作用和干滑动摩擦下的耐磨性，从而使钢结构中亚稳态残余奥氏体的含量增加，并经历动态应变马氏体相变（DSMT），自发性。负载下的淬火效果（SQL）。为了获得亚稳的最佳含量保持在石墨化钢的结构奥氏体（36％）与回火马氏体和石墨一起，以及为达到最高的相对耐磨损性（ε_一个在无水= 4.8）和耐磨损性滑动摩擦（ε _DSF = 2.8），比常规热处理后发生（ε_一个= 3.5）和（ε _DSF= 2），淬火前需要加热到950°С。等温淬火，包括在850°C的奥氏体化，在水中冷却至300°C的等温温度，在此温度下在炉中保持10分钟，然后在空气中冷却，导致相对耐磨性略有增加（ε_一个= 3.8）相比，标准的热处理（ε_一个= 3.5）。与在通常的温度下常规淬火（_εdsf = 2）或在高温下淬火（_εds）相比，该程序在干式滑动摩擦（_εdsf = 3.6）下可显着提高石墨化钢的相对耐磨性。_dsf= 2.8）和低温回火。对于石墨化钢，建议的处理程序的使用应提高这种材料制成的工具的耐用性，并降低其购买成本。