Title:
HIGH-HARDNESS AND HIGH-THERMAL-EXPANSION STEEL
Document Type and Number:
Japanese Patent JP2023125308
Kind Code:
A
Abstract:
To provide a steel having both high hardness and a high thermal expansion coefficient at low cost.SOLUTION: A high-hardness and high-thermal-expansion steel includes, in mass%, C: more than 0.10 to 0.60%, Si: 0.05 to 0.80%, Mn: 2.0 to 10.0%, P: 0.050% or less, S: 0.050% or less, Ni: 6.0 to 15.0%, Cr: 6.0 to 18.0%, Mo: 0.01 to 0.50%, Cu: 0.05 to 0.75%, Al: 0.001 to 0.100%, V: more than 0.50 to 3.00%, and N: 0.01-0.10%, with the balance being Fe and inevitable impurities, and satisfies Formula 1, Formula 2, and Formula 3. Formula 1: V/{4([C]+[N])}=0.5-1.5, Formula 2: 551-462([C]+[N]-0.07[V])-9.2[Si]-8.1[Mn]-13.7[Cr]-29([Ni]+[Cu])-18.5[Mo]≤-40, and Formula 3: {(TA+273)×(20+log ta)}/1000=17.0-22.0.SELECTED DRAWING: None
Inventors:
HOSODA TAKASHI
Application Number:
JP2022029320A
Publication Date:
September 07, 2023
Filing Date:
February 28, 2022
Export Citation:
Assignee:
SANYO SPECIAL STEEL CO LTD
International Classes:
C22C38/00; C22C38/60
Attorney, Agent or Firm:
Hironori Yokoi
Kenji Yokoi
Satoshi Yokoi
Kenji Yokoi
Satoshi Yokoi
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