Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a carbide-free bainite/martensite complex-phase steel rail and a preparation method thereof.The preparation method comprises the steps that a steel billet obtained through smelting and casting according to component design is subjected to austenite homogenization treatment at the temperature of 1200-1280 DEG C and then rolled, and a steel rail intermediate is obtained; carrying out primary cooling treatment on the steel rail intermediate, and cooling the steel rail intermediate to 250-300 DEG C; carrying out first heating treatment, heating to 300-400 DEG C, and carrying out heat preservation for a first preset time; carrying out secondary cooling treatment, cooling to 250-300 DEG C, and carrying out heat preservation for a second preset time; and carrying out third cooling treatment, and cooling to room temperature. Based on the obdurability characteristic of the carbide-free bainite and the bainite/martensite complex phase structure, the novel carbide-free bainite/martensite complex phase structure with more excellent obdurability and the steel rail steel thereof are obtained through proper alloy elements in the carbon content range of 0.20-0.30% under the assistance of proper thermal deformation and heat treatment processes; good market application prospects are realized.
本发明公开了一种无碳化物贝氏体/马氏体复相钢轨及其制备方法，制备方法包括：将按照成分设计冶炼浇铸得到的钢坯在1200‑1280℃下进行奥氏体均匀化处理后轧制，得到钢轨中间体；将所述钢轨中间体进行第一次冷却处理，冷却至250‑300℃；进行第一次加热处理，加热至300‑400℃后保温第一预定时间；进行第二次冷却处理，冷却至250‑300℃后保温第二预定时间；进行第三次冷却处理，冷却至室温。本发明基于无碳化物贝氏体与贝氏体/马氏体复相组织强韧性特点，在0.20‑0.30%碳含量范围内，通过适当的合金元素，辅以适当的热变形和热处理工艺，获得了强韧性更为优异的新型无碳化物贝氏体/马氏体复相组织及其钢轨钢，具有较好的市场应用前景。
The invention discloses a carbide-free bainite/martensite complex-phase steel rail and a preparation method thereof.The preparation method comprises the steps that a steel billet obtained through smelting and casting according to component design is subjected to austenite homogenization treatment at the temperature of 1200-1280 DEG C and then rolled, and a steel rail intermediate is obtained; carrying out primary cooling treatment on the steel rail intermediate, and cooling the steel rail intermediate to 250-300 DEG C; carrying out first heating treatment, heating to 300-400 DEG C, and carrying out heat preservation for a first preset time; carrying out secondary cooling treatment, cooling to 250-300 DEG C, and carrying out heat preservation for a second preset time; and carrying out third cooling treatment, and cooling to room temperature. Based on the obdurability characteristic of the carbide-free bainite and the bainite/martensite complex phase structure, the novel carbide-free bainite/martensite complex phase structure with more excellent obdurability and the steel rail steel thereof are obtained through proper alloy elements in the carbon content range of 0.20-0.30% under the assistance of proper thermal deformation and heat treatment processes; good market application prospects are realized.
本发明公开了一种无碳化物贝氏体/马氏体复相钢轨及其制备方法，制备方法包括：将按照成分设计冶炼浇铸得到的钢坯在1200‑1280℃下进行奥氏体均匀化处理后轧制，得到钢轨中间体；将所述钢轨中间体进行第一次冷却处理，冷却至250‑300℃；进行第一次加热处理，加热至300‑400℃后保温第一预定时间；进行第二次冷却处理，冷却至250‑300℃后保温第二预定时间；进行第三次冷却处理，冷却至室温。本发明基于无碳化物贝氏体与贝氏体/马氏体复相组织强韧性特点，在0.20‑0.30%碳含量范围内，通过适当的合金元素，辅以适当的热变形和热处理工艺，获得了强韧性更为优异的新型无碳化物贝氏体/马氏体复相组织及其钢轨钢，具有较好的市场应用前景。
Carbide-free bainite/martensite complex-phase steel rail and preparation method thereof
无碳化物贝氏体/马氏体复相钢轨及制备方法
27.12.2024
Patent
Elektronische Ressource
Chinesisch
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