出口R350HT热处理钢轨试制
Trial-production of R350HT Heat-treated Rail
李平，智建国，李德虹，郑瑞
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作者单位：内蒙古包钢钢联股份有限公司技术中心,内蒙古包钢钢联股份有限公司轨梁厂
中文关键字：热处理；钢轨；生产
英文关键字：heat treatment;rails;production
中文摘要：沙特需要一批R350HT高硬度钢轨铺设在利雅得轻轨的曲线段上。为了保证出口钢轨的硬度和强度指标达到设计要求，我们对R350HT钢轨钢成分进行了优化。通过成分调整，使轧态轨性能有了较大提高，为热处理轨性能提供了基础保证。电淬火车间主要对钢轨加热温度、钢轨行走速度、喷风时间、喷雾压力等参数进行调整，确定了合适的淬火工艺。通过批量生产，生产出的淬火钢轨抗拉强度平均1235MPa，踏面硬度平均385HB，横断面布氏硬度满足用户要求。
英文摘要：Saudi Arabia requires a number of R350HT rails with high hardness laying on the curve of Riyadh light rail. In order to ensure the indices of hardness and strength for rails exported to satisfy the design requirements, the components of the R350HT rails are optimized on the basis of exported heat-treated rails. The performances of rolling state-orbit have been greatly improved by adjusting the components, which provides the basic guarantee for performances of heat-treated rails. The suitable quenching technology is determined by adjusting the heating temperature, moving speed of rails, blowing time and jet pressure in electrical-quenching workshop. Through the mass production, the average tensile strength of hardened rails is 1235MPa, the average tread hardness is 385HB and the cross-sectional Brinell hardness could meet users’ requirements.