EP1072691A3 - Tool steel with excellent workability, machinability and heat treatment characteristics, and die using same - Google Patents

Tool steel with excellent workability, machinability and heat treatment characteristics, and die using same Download PDF

Info

Publication number
EP1072691A3
EP1072691A3 EP99123519A EP99123519A EP1072691A3 EP 1072691 A3 EP1072691 A3 EP 1072691A3 EP 99123519 A EP99123519 A EP 99123519A EP 99123519 A EP99123519 A EP 99123519A EP 1072691 A3 EP1072691 A3 EP 1072691A3
Authority
EP
European Patent Office
Prior art keywords
tempering
tool steel
heat treatment
less
die
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.)
Granted
Application number
EP99123519A
Other languages
German (de)
French (fr)
Other versions
EP1072691A2 (en
EP1072691B1 (en
Inventor
Kunichika Kubota
Miki Yamaoka
Yukio Abe
Yasushi Tamura
Yoshihiro Kada
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Metals Ltd filed Critical Hitachi Metals Ltd
Publication of EP1072691A2 publication Critical patent/EP1072691A2/en
Publication of EP1072691A3 publication Critical patent/EP1072691A3/en
Application granted granted Critical
Publication of EP1072691B1 publication Critical patent/EP1072691B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")

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)
  • Heat Treatment Of Steel (AREA)

Abstract

Provided is a tool steel which contains, by weight, C and Cr in both of which (Cr + 5.9 x C) is 9.1 to 12.5, (Cr - 4.2 x C) being not more than 5 and (Cr - 6.3 x C) being not less than 2.2. In addition to these elements, this tool steel preferably contains 0.1 to 0.6% Si, 0.1 to 1.2% Mn, at least one of Mo and W of 0.6 to 1.25% in total in terms of (Mo + 1/2W), less than 0.5% V, not more than 0.12% S, not more than 100 ppm of Ca, and the balance Fe and incidental impurities. Moreover, in this tool steel, the Cr segregation range in matrix after hardening is not more than 1% by weight, or the maximum tempering hardness by tempering at a temperature of not lower than 500 DEG C is not less than 57 HRC, or a size variation due to heat treatment occurring by tempering at a temperature of not lower than 500 DEG C is not more than 0.1% relative to the size measured just before hardening in terms of linear expansion coefficient and a size variation due to heat treatment by tempering at 490 DEG C is not more than 0. Provided is also a die made by tempering the steel of the invention to a hardness of not less than 55 HRC and cutting the steel. <IMAGE>
EP99123519A 1999-07-30 1999-11-25 Tool steel with excellent workability, machinability and heat treatment characteristics, and die using same Expired - Lifetime EP1072691B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP21622799 1999-07-30
JP21622799 1999-07-30

Publications (3)

Publication Number Publication Date
EP1072691A2 EP1072691A2 (en) 2001-01-31
EP1072691A3 true EP1072691A3 (en) 2002-01-23
EP1072691B1 EP1072691B1 (en) 2004-05-19

Family

ID=16685283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99123519A Expired - Lifetime EP1072691B1 (en) 1999-07-30 1999-11-25 Tool steel with excellent workability, machinability and heat treatment characteristics, and die using same

Country Status (6)

Country Link
EP (1) EP1072691B1 (en)
KR (1) KR100368541B1 (en)
CN (1) CN1097642C (en)
AT (1) ATE267274T1 (en)
DE (1) DE69917444T2 (en)
TW (1) TW499488B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001303205A (en) * 2000-04-25 2001-10-31 Riken Corp Nitriding steel excellent in wear resistance and fatigue strength and sliding member
US20060251537A1 (en) * 2002-12-25 2006-11-09 Kunichika Kubota Cold die steel excellent in characteristic of suppressing dimensional change
US8012272B2 (en) 2007-10-31 2011-09-06 Daido Tokushuko Kabushiki Kaisha Tool steels and manufacturing method thereof
CN101831653A (en) * 2010-06-23 2010-09-15 天津市电力公司 Martensite high-alloy heat resistant steel metallography detection polishing agent and application thereof
JP4860774B1 (en) * 2011-03-31 2012-01-25 日本高周波鋼業株式会社 Cold work tool steel
EP2979772B1 (en) * 2013-03-29 2018-09-05 Hitachi Metals, Ltd. Process for producing steel material for die, process for producing prehardened steel product for die, and process for producing cold working die
US9994925B2 (en) * 2015-02-04 2018-06-12 Hitachi Metals, Ltd. Cold work tool material, cold work tool and method for manufacturing same
CN105880475B (en) * 2016-06-21 2017-11-10 王仙寿 Engine cylinder cover casting mould
CN112899567B (en) * 2021-01-18 2022-05-31 中国科学院金属研究所 High-purity high-strength-toughness rare earth free-cutting steel
CN113634738A (en) * 2021-07-24 2021-11-12 共享铸钢有限公司 Cutting method for riser and patch of ball valve type casting with shaft

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04172113A (en) * 1990-11-05 1992-06-19 Sumitomo Metal Ind Ltd Caliber roll for cold tube rolling mill and its manufacture
JPH04362153A (en) * 1991-06-06 1992-12-15 Daido Steel Co Ltd High hardness weather resistant steel excellent in cold workability
JPH07102346A (en) * 1993-10-04 1995-04-18 Daido Steel Co Ltd High hardness stainless steel excellent in cold workability
JPH08277444A (en) * 1995-04-06 1996-10-22 Sumitomo Metal Ind Ltd Tough piston for civil engineering and construction machine excellent in setting resistance and its production
EP0930374A1 (en) * 1998-01-06 1999-07-21 Sanyo Special Steel Co., Ltd. Production of cold working tool steel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2745587B1 (en) * 1996-03-01 1998-04-30 Creusot Loire STEEL FOR USE IN PARTICULAR FOR THE MANUFACTURE OF MOLDS FOR INJECTION OF PLASTIC MATERIAL

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04172113A (en) * 1990-11-05 1992-06-19 Sumitomo Metal Ind Ltd Caliber roll for cold tube rolling mill and its manufacture
JPH04362153A (en) * 1991-06-06 1992-12-15 Daido Steel Co Ltd High hardness weather resistant steel excellent in cold workability
JPH07102346A (en) * 1993-10-04 1995-04-18 Daido Steel Co Ltd High hardness stainless steel excellent in cold workability
JPH08277444A (en) * 1995-04-06 1996-10-22 Sumitomo Metal Ind Ltd Tough piston for civil engineering and construction machine excellent in setting resistance and its production
EP0930374A1 (en) * 1998-01-06 1999-07-21 Sanyo Special Steel Co., Ltd. Production of cold working tool steel

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 474 (M - 1319) 2 October 1992 (1992-10-02) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 232 (C - 1056) 12 May 1993 (1993-05-12) *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 07 31 August 1995 (1995-08-31) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 02 28 February 1997 (1997-02-28) *

Also Published As

Publication number Publication date
KR20010012039A (en) 2001-02-15
ATE267274T1 (en) 2004-06-15
CN1282798A (en) 2001-02-07
CN1097642C (en) 2003-01-01
DE69917444D1 (en) 2004-06-24
DE69917444T2 (en) 2005-06-02
KR100368541B1 (en) 2003-01-24
EP1072691A2 (en) 2001-01-31
EP1072691B1 (en) 2004-05-19
TW499488B (en) 2002-08-21

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