Invention Grant
- Patent Title: Method for producing high-speed tool steel material, method for producing high-speed tool steel product, and high-speed tool steel product
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Application No.: US15579626Application Date: 2016-06-21
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Publication No.: US10661353B2Publication Date: 2020-05-26
- Inventor: Shiho Fukumoto , Taishiroh Fukumaru
- Applicant: HITACHI METALS, LTD.
- Applicant Address: JP Tokyo
- Assignee: HITACHI METALS, LTD.
- Current Assignee: HITACHI METALS, LTD.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@35c899dd
- International Application: PCT/JP2016/068374 WO 20160621
- International Announcement: WO2016/208571 WO 20161229
- Main IPC: C21D9/22
- IPC: C21D9/22 ; B23B27/14 ; B23C5/16 ; C22C38/00 ; B23B51/00 ; C22C38/36 ; C21D9/24 ; C21D8/00 ; C21D8/06 ; C21D1/18 ; C21D1/26 ; C21D6/00 ; C21D6/02 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/22 ; C22C38/24 ; C22C38/30

Abstract:
Provided are: a method for producing a high-speed tool steel material capable of increasing carbides in the structure of a high-speed tool steel product; a method for producing a high-speed tool steel product; and a high-speed tool steel product. The method for producing a high-speed tool steel material is provided with: a casting step for casting molten steel to obtain a steel ingot; a blooming step for heating the steel ingot obtained in said casting step to a temperature higher than 1120° C. and thereafter hot-working same to obtain an intermediate material; and a finishing step for heating the intermediate material obtained in the blooming step to a temperature of 900-1120° C. and thereafter hot-working same to obtain the high-speed tool steel material. Further, said method for producing a high-speed tool steel material is provided with an annealing step for annealing the high-speed tool steel material obtained in said finishing step. The present invention is also: a method for producing a high-speed tool steel product, wherein quenching and annealing is performed on the high-speed tool steel material obtained in the production method above; and a high-speed tool steel product.
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