The invention provides a railway wheel with excellent toughness of a hub part. A railway wheel according to the present disclosure includes a rim portion, a hub portion having a through-hole, and a plate portion. The railway wheel has a chemical composition comprising, in mass%, more than 0.80% but 1.35% or less of C, 1.00% or less of Si, 0.10-1.50% of Mn, 0-0.050% of P, 0-0.030% of S, and 0.0200% or less of N, with the balance being Fe and impurities. In a cross-section of the hub section when the hub section is cut in a plane including the central axis along the direction of the central axis of the through hole, when a 15 mm * 15 mm region divided by a line segment is defined as a rectangular region, the average C concentration in each rectangular region in the cross-section of the hub section is 1.40 mass% or less. The line segments include a plurality of axial line segments parallel to the central axis and arranged at a pitch of 15 mm in the radial direction of the railway wheel from the inner peripheral surface of the through hole, and a plurality of radial line segments perpendicular to the central axis and arranged at a pitch of 15 mm in the direction of the central axis from the surface of the hub portion in which the opening of the through hole is formed.
本发明提供一种轮毂部的韧性优异的铁道车轮。本公开的铁道车轮包括轮辋部、具有贯通孔的轮毂部、以及板部。铁道车轮的化学组成以质量%计为C:大于0.80%且为1.35%以下、Si:1.00%以下、Mn:0.10%~1.50%、P:0%~0.050%、S:0%~0.030%、N:0.0200%以下,并且余量为Fe和杂质。在沿着贯通孔的中心轴线方向将轮毂部于包含中心轴线的面切断时的轮毂部的截面中,在将利用如下线段划分的15mm×15mm的区域定义为矩形区域时,轮毂部的截面中的各矩形区域的平均C浓度为1.40质量%以下,所述线段为:与中心轴线平行且从贯通孔的内周面沿着铁道车轮的径向以15mm的间距排列的多个轴向线段,以及,与中心轴线垂直且从轮毂部的形成有贯通孔的开口的表面沿着中心轴线方向以15mm的间距排列的多个径向线段。
Railway wheel
铁道车轮
2024-05-28
Patent
Elektronische Ressource
Chinesisch