道岔及道口钢轨

[中文适用范围]： 本文件规定了按照 ISO 5003 规定承载铁路车轮的道岔和交叉轨道。 这些轨道与平底 (vignole) 铁路钢轨结合使用。 道岔和交叉钢轨生产出来后，要进行二次加工（锻造、磨削和热处理等）以供铁路轨道使用。 本文件不包括二次加工。 二次加工在其他标准中或通过制造商和买方之间的协议进行了规定。 规定了 16 个珠光体钢牌号，硬度范围为 200 HBW 至 440 HBW，包括非热处理碳锰钢、非热处理合金钢、热处理碳锰钢和热处理低合金钢。 [外文原描述]： This document specifies switch and crossing rails that carry railway wheels as specified in ISO 5003. These are used in conjunction with flat bottom (vignole) railway rails. After switch and crossing rails are produced, in order to be ready for railway track use, secondary processing (forging, grinding and heat treatment etc.) is carried out. This document does not include secondary processing. Secondary processing is specified in other standards or through agreements between manufacturer and purchaser. Sixteen pearlitic steel grades are specified, covering a hardness range of 200 HBW to 440 HBW, and include non-heat-treated carbon manganese steels, non-heat-treated alloy steels, heat-treated carbon manganese and heat-treated low