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Method of manufacturing an automobile suspension part

  • US 9,527,369 B2
  • Filed: 05/09/2013
  • Issued: 12/27/2016
  • Est. Priority Date: 03/15/2010
  • Status: Active Grant
First Claim
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1. A manufacturing method of an aluminum alloy automobile suspension part having a through-hole, a rib and a web connecting the rib and the through-hole, wherein a normal section of the automobile suspension part that includes the rib and whose crystal grain is not coarsened has a yield strength of 270 MPa or larger and a recrystallization ratio of ≦

  • 10%, the method comprising;

    an ingot material preparing step of preparing an ingot material;

    a heat treatment step of performing heat treatment of the ingot material;

    a shaping step of shaping the heat-treated ingot material to form a shaped member;

    a forging step of forging the shaped member;

    a through-hole forming step of forming a through-hole in the forged shaped member; and

    a thermal refining step of performing thermal refining of the forged shaped member on which the through-hole is formed, whereina minimum length of the web between a rib end on a side of the through-hole and a through-hole end is 6 mm or larger.

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