公开(公告)号：US10584401B2

公开(公告)日：2020-03-10

申请号：US14731991

申请日：2015-06-05

Applicant: Shimano Inc.

Inventor： Kazunori Kobayashi ,  Wataru Yamaguchi ,  Masanori Taniguchi ,  Toru Iwai

IPC: C22C21/08 ,  C22F1/05 ,  C22F1/043 ,  C22C21/00 ,  C22F1/047 ,  C22C21/06 ,  C22C21/02 ,  C22F1/04

Abstract: A rolled aluminum alloy material is provided with excellent strength and press workability and with which a poor and patchy appearance is less likely to occur after the alumite treatment. The rolled aluminum alloy material can be utilized for components of a bicycle crank. The rolled aluminum alloy material has a component composition comprising 0.6-1.4 wt % of Mg, 0.3-1.0 wt % of Si, 0.1-0.5 wt % of Cu, 0.02-0.4 wt % of Cr, and 0.1-0.6 wt % of Mn, and Al and inevitable impurities as the remainder.