{
  "$type": "site.standard.document",
  "description": "Provided can be a high-strength stabilizer excellent in bendability and fatigue characteristics even when a hollow steel pipe is used as the stabilizer to reduce weight. An electric resistance welded steel pipe (5) for manufacturing a hollow stabilizer has a Rankford value (r value) in a pipe…",
  "path": "/patents/1422423",
  "publishedAt": "2024-11-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B21C37/08",
    "JFE STEEL CORP [JP]"
  ],
  "textContent": "Provided can be a high-strength stabilizer excellent in bendability and fatigue characteristics even when a hollow steel pipe is used as the stabilizer to reduce weight. An electric resistance welded steel pipe (5) for manufacturing a hollow stabilizer has a Rankford value (r value) in a pipe longitudinal direction of from 0.7 to less than 1.0. The electric resistance welded steel pipe (5) is subjected to cold bending and then to a heat treatment including quenching and tempering to manufacture a stabilizer. The cold bending is cold rotary draw bending. When bent with a bend radius of from 1.0 times to 3.0 times an outer diameter of the electric resistance welded steel pipe (5) before cold bending by the cold rotary draw bending, a flattening ratio is from 0% to 10%, a thickness reduction rate on a bending outside and a thickness increase rate on a bending inside are from 0% to 10%, and additionally, a circumferential length change of a bending center portion is from 0% to 10%. A Vickers hardness of the stabilizer after the heat treatment is adjusted to from 400 HV to less than 580 HV.",
  "title": "ELECTRIC-RESISTANCE-WELDED STEEL PIPE FOR PRODUCING HOLLOW STABILIZER, HOLLOW STABILIZER, AND METHOD FOR PRODUCING SAME"
}