Title:
ALLOY TOOL STEEL FOR HOT WORKING
Document Type and Number:
WIPO Patent Application WO/2023/167226
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an alloy tool steel for hot working that has both excellent toughness and excellent softening resistance. Provided is an alloy tool steel for hot working, containing carbon, silicon, manganese, nickel, chromium, molybdenum, vanadium, niobium, and nitrogen, the remainder being iron and impurities, wherein: the metallographic structure of the alloy tool steel for hot working is martensite or bainite; the metallographic structure includes blocks with a diameter of 2.0–6.0 μm; and a solid solute element on quenching parameter Q, calculated on the basis of the formula Q = (Cr1 + Mo1 + V1 + Nb1) / (Cr2 + Mo2 + V2 + Nb2) [where (Cr1 + Mo1 + V1 + Nb1) represents the total amount of chromium, molybdenum, vanadium, and niobium in solid solution in austenite at the quenching temperature and (Cr2 + Mo2 + V2 + Nb2) represents the total amount of chromium, molybdenum, vanadium, and niobium in solid solution in austenite at 800°C], is at least 1.12.
Inventors:
MIURA KODAI (JP)
Application Number:
PCT/JP2023/007504
Publication Date:
September 07, 2023
Filing Date:
March 01, 2023
Export Citation:
Assignee:
SANYO SPECIAL STEEL CO LTD (JP)
International Classes:
C22C38/00; C21D8/06; C21D9/00; C22C38/48
Domestic Patent References:
| WO2021149676A1 | 2021-07-29 |
Foreign References:
| JP2001089826A | 2001-04-03 | |||
| JP2021017623A | 2021-02-15 |
Attorney, Agent or Firm:
MIYAJIMA Manabu et al. (JP)
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