GB1355475A - Age-hardened nickel martensitic steel - Google Patents

Age-hardened nickel martensitic steel

Info

Publication number
GB1355475A
GB1355475A GB829472A GB829472A GB1355475A GB 1355475 A GB1355475 A GB 1355475A GB 829472 A GB829472 A GB 829472A GB 829472 A GB829472 A GB 829472A GB 1355475 A GB1355475 A GB 1355475A
Authority
GB
United Kingdom
Prior art keywords
age
nickel
martensite
molybdenum
feb
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB829472A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1355475A publication Critical patent/GB1355475A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

1355475 Steel compositions HITACHI Ltd 23 Feb 1972 [26 Feb 1971] 8294/72 HeadingC7A An age-hardenable martensitic steel comprises, in weight percent:- 18 to 26% nickel 0À15 to 0À35% aluminium 1À0 to 2À0% titanium 0À2 to 4À0% molybdenum, tungsten, chromium and / or vanadium optionally up to 1% niobium and up to 0À5% manganese, the balance being iron and impurities including not more than 0À03% carbon, 0À1% silicon, 0À01% each of phosphorus sulphur and nitrogen. The addition of molybdenum, tungsten, chromium and/or vanadium suppresses the formation of Ni 3 (Al, Ti) at the grain boundaries thus conferring greater ductility together with mechanical strength. Alloys containing around 20% nickel may be converted into martensite by cooling to room temperature after solution treatment, but alloys containing more than 23% nickel need to be cooled to at least -73‹C in order to convert the microstructure fully to martensite; alternatively after cooling to room temperature, the alloy is arranged at 600 to 750‹C for 1-20 hours. Age-hardening is preferably accomplished at 400 to 550‹C for 0À5 to 30 hours.
GB829472A 1971-02-26 1972-02-23 Age-hardened nickel martensitic steel Expired GB1355475A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP937171 1971-02-26

Publications (1)

Publication Number Publication Date
GB1355475A true GB1355475A (en) 1974-06-05

Family

ID=11718597

Family Applications (1)

Application Number Title Priority Date Filing Date
GB829472A Expired GB1355475A (en) 1971-02-26 1972-02-23 Age-hardened nickel martensitic steel

Country Status (3)

Country Link
DE (1) DE2209085A1 (en)
FR (1) FR2127799A5 (en)
GB (1) GB1355475A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443254A (en) * 1980-10-31 1984-04-17 Inco Research & Development Center, Inc. Cobalt free maraging steel
US4832909A (en) * 1986-12-22 1989-05-23 Carpenter Technology Corporation Low cobalt-containing maraging steel with improved toughness
US4871511A (en) * 1988-02-01 1989-10-03 Inco Alloys International, Inc. Maraging steel
EP0931844A1 (en) * 1998-01-23 1999-07-28 Imphy S.A. Cobalt-free maraging steel
FR2774396A1 (en) * 1998-02-04 1999-08-06 Imphy Sa MARAGING STEEL WITHOUT COBALT AND TITANIUM

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT374846B (en) * 1982-09-15 1984-06-12 Voest Alpine Ag HEART PIECE, IN PARTICULAR HEART PIECE TIP, FOR RAIL CROSSINGS OR SWITCHES, AND METHOD FOR THE PRODUCTION THEREOF

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443254A (en) * 1980-10-31 1984-04-17 Inco Research & Development Center, Inc. Cobalt free maraging steel
US4832909A (en) * 1986-12-22 1989-05-23 Carpenter Technology Corporation Low cobalt-containing maraging steel with improved toughness
US4871511A (en) * 1988-02-01 1989-10-03 Inco Alloys International, Inc. Maraging steel
EP0931844A1 (en) * 1998-01-23 1999-07-28 Imphy S.A. Cobalt-free maraging steel
FR2774099A1 (en) * 1998-01-23 1999-07-30 Imphy Sa MARAGING STEEL WITHOUT COBALT
FR2774396A1 (en) * 1998-02-04 1999-08-06 Imphy Sa MARAGING STEEL WITHOUT COBALT AND TITANIUM
EP0935007A1 (en) * 1998-02-04 1999-08-11 Imphy S.A. Cobalt-free and titanium-free maraging steel

Also Published As

Publication number Publication date
DE2209085A1 (en) 1972-09-07
FR2127799A5 (en) 1972-10-13

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee