Invention Grant
- Patent Title: Method for producing sintered member, and sintered member
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Application No.: US17051398Application Date: 2019-05-17
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Publication No.: US11623275B2Publication Date: 2023-04-11
- Inventor: Keiichi Uemoto , Tetsuya Hayashi , Tatsushi Yamamoto , Shunichi Yano
- Applicant: SUMITOMO ELECTRIC SINTERED ALLOY, LTD.
- Applicant Address: JP Okayama
- Assignee: SUMITOMO ELECTRIC SINTERED ALLOY, LTD.
- Current Assignee: SUMITOMO ELECTRIC SINTERED ALLOY, LTD.
- Current Assignee Address: JP Okayama
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- Priority: WOPCT/JP2018/019912 20180523
- International Application: PCT/JP2019/019767 WO 20190517
- International Announcement: WO2019/225513 WO 20191128
- Main IPC: B22F3/16
- IPC: B22F3/16 ; B22F3/24 ; C22C33/02 ; C22C38/16

Abstract:
A method for producing a sintered member, including the steps of: preparing a raw powder; press-forming the raw powder to produce a green compact; and sintering the green compact by high-frequency induction heating, wherein a temperature of the green compact in the sintering step is controlled to satisfy all the following conditions (I) to (III): (I) the temperature is increased without maintaining the temperature in a temperature range equal to or higher than an A1 point of an Fe—C phase diagram and lower than the sintering temperature of the green compact, (II) a heating rate is set to 12° C./s or more in a temperature range of the A1 point to an A3 point of the Fe—C phase diagram, and (III) a heating rate is set to 4° C./s or more in a temperature range of the A3 point of the Fe—C phase diagram to the sintering temperature of the green compact.
Public/Granted literature
- US20210129223A1 METHOD FOR PRODUCING SINTERED MEMBER, AND SINTERED MEMBER Public/Granted day:2021-05-06
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