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首页> 外国专利> NODULAR CAST IRON, EUTECTIC CEMENTITE INCLUSIONS AND BAINITE-AUSTENITIC METAL BASE HEAT TREATMENT METHOD

NODULAR CAST IRON, EUTECTIC CEMENTITE INCLUSIONS AND BAINITE-AUSTENITIC METAL BASE HEAT TREATMENT METHOD

机译：球墨铸铁，共晶渗碳和贝氏体-奥氏体金属基热处理方法

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FIELD: metallurgy.;SUBSTANCE: invention relates to metallurgy, in particular to methods of heat treatment of nodular cast irons, and can be used to obtain wear-resistant products. Method of heat treatment of cast iron containing silicon and manganese as alloying elements, with obtaining a structure with spherical graphite, inclusions of eutectic cementite and a bainite-austenitic metal base, includes heat treatment in two stages, while in the first stage the blank is heated to a temperature of 940–960 °C, kept for 1.0–1.5 h and subjected to quenching by cooling in water to 450–500 °C and then on the air, in the second stage, the blanks are heated in a salt bath to a temperature of 1,150–1,160 °C, kept there for 1.0–1.5 minutes, transfer them to the salt bath with a temperature of 360–380 °C, kept for 1.0–1.5 h, followed by cooling in water and tempering at a temperature of 200–220 °C for 1.5–2 hours.;EFFECT: production of cast iron with a high level of strength, toughness and wear resistance due to the creation in it of a matrix structure of a dispersion-strengthened macrostructured composite, which consists of spherical particles of graphite uniformly arranged in a bainite-austenitic matrix, enclosed in a solid sheath of ledeburite.;1 cl, 1 dwg, 3 tbl, 1 ex
机译：球墨铸铁的热处理方法技术领域本发明涉及冶金学，尤其涉及球墨铸铁的热处理方法，并可用于获得耐磨产品。热处理含有硅和锰作为合金元素的铸铁的方法，要获得具有球形石墨，共晶渗碳体和贝氏体-奥氏体金属基体的夹杂物，包括两个阶段的热处理，而在第一阶段中，空白是加热到940-960°C的温度，保持1.0-1.5小时，然后通过在水中冷却至450-500°C，然后在空气中进行淬火，然后在第二阶段中，将坯料在盐浴中加热到1,150–1,160°C的温度，保持在那里1.0–1.5分钟，将它们转移到温度为360–380°C的盐浴中，保持1.0–1.5 h，然后在水中冷却并于在200–220°C的温度下保持1.5–2小时。效果：由于在基体中形成了分散强化的宏观结构复合材料，因此生产出具有高水平的强度，韧性和耐磨性的铸铁由均匀排列的石墨球形颗粒组成在贝氏体-奥氏体基体中，包围在莱德贝特的固体鞘中。; 1 cl，1 dwg，3 tbl，1 ex

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