Invention Grant
- Patent Title: Method for producing aluminum alloy rolled material for molding having excellent bending workability and ridging resistance
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Application No.: US15558089Application Date: 2017-07-12
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Publication No.: US11053576B2Publication Date: 2021-07-06
- Inventor: Yusuke Yamamoto , Yoshifumi Shinzato , Mineo Asano
- Applicant: UACJ CORPORATION
- Applicant Address: JP Tokyo
- Assignee: UACJ CORPORATION
- Current Assignee: UACJ CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Greer Burns & Crain Ltd.
- Priority: JPJP2016-139812 20160714,JPJP2017-025445 20170214
- International Application: PCT/JP2017/025401 WO 20170712
- International Announcement: WO2018/012532 WO 20180118
- Main IPC: C22F1/05
- IPC: C22F1/05 ; C22F1/057 ; C22C21/02 ; C22C21/08 ; B21B3/00 ; C22C21/14 ; C22C21/16 ; C22C21/18

Abstract:
The present disclosure relates to a method for producing an aluminum alloy rolled material for deformation molding, the method including: a step of performing homogenization treatment of an ingot including an aluminum alloy with predetermined composition; a step of cooling the aluminum alloy after the homogenization treatment so that an average cooling rate in an ingot thickness of ¼ part from 500° C. to 320° C. is 30° C./h to 2000° C./h; and a step of starting hot rolling at 370° C. to 440° C. and winding the hot-rolled aluminum alloy at 310 to 380° C., in which the method for producing an aluminum alloy rolled material for deformation molding further includes a step of retaining the aluminum alloy after the cooling step for 0.17 hours or more at a heating temperature before rolling set within a range of 370° C. to 440° C. before the hot rolling.
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