{
  "$type": "site.standard.document",
  "description": "Provided is a railway wheel which has excellent toughness even if the C content is as high as 0.80% or more. The chemical composition of the railway wheel of the present embodiment consists of: in mass%, C: 0.80 to 1.60%, Si: 1.00% or less, Mn: 0.10 to 1.25%, P: 0.050% or less, S: 0.030% or less…",
  "path": "/patents/1419496",
  "publishedAt": "2024-12-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60B17/0003",
    "NIPPON STEEL CORP [JP]"
  ],
  "textContent": "Provided is a railway wheel which has excellent toughness even if the C content is as high as 0.80% or more. The chemical composition of the railway wheel of the present embodiment consists of: in mass%, C: 0.80 to 1.60%, Si: 1.00% or less, Mn: 0.10 to 1.25%, P: 0.050% or less, S: 0.030% or less, Al: 0.010 to 0.650%, and N: 0.0030 to 0.0200%, with the balance being Fe and impurities, and wherein, in a microstructure of the web part of the railway wheel, an area fraction of pearlite is 85.0% or more, an area fraction of pro-eutectoid cementite is 0.90 to 15.00%, and an average value of a width W of the pro-eutectoid cementite defined by Formula (1) is less than 0.70 µm: W=1/2×P/2−P/22−4A1/2 where, in Formula (1), A is an area (µm2) of the pro-eutectoid cementite, and P is a circumference length (µm) of the pro-eutectoid cementite.",
  "title": "RAILWAY WHEEL"
}