EP0882808A1 - Verfahren zur Herstellung eines Stahles für Formen grosser Abmessungen - Google Patents

Verfahren zur Herstellung eines Stahles für Formen grosser Abmessungen Download PDF

Info

Publication number
EP0882808A1
EP0882808A1 EP98401272A EP98401272A EP0882808A1 EP 0882808 A1 EP0882808 A1 EP 0882808A1 EP 98401272 A EP98401272 A EP 98401272A EP 98401272 A EP98401272 A EP 98401272A EP 0882808 A1 EP0882808 A1 EP 0882808A1
Authority
EP
European Patent Office
Prior art keywords
ppm
steel
niobium
manganese
zirconium
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
EP98401272A
Other languages
English (en)
French (fr)
Other versions
EP0882808B1 (de
Inventor
Jacques Adrien
Bertrand Remi
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.)
Thyssen France SA
Original Assignee
Thyssen France SA
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 Thyssen France SA filed Critical Thyssen France SA
Publication of EP0882808A1 publication Critical patent/EP0882808A1/de
Application granted granted Critical
Publication of EP0882808B1 publication Critical patent/EP0882808B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese

Definitions

  • the subject of the present invention is a method of manufacture of steel for large molds which makes it possible to obtain a steel solving these difficulties.
  • This process is characterized in that the steel is obtained by melting in an electric furnace, followed by a secondary metallurgical operation in a heating pocket, this operation itself being followed by degassing under vacuum of less than 1 torr, or even 0.2 torr, of a mixture having the following weight composition:
  • the complement being iron and impurities characteristics of steel making.
  • the ingot obtained after may be submitted degassing at a reflow by consumable electrode under vacuum or under slag, the ingot serving as an electrode consumable.
  • the invention also relates to a steel for molds characterized in that it has the following weight composition.
  • the complement being iron and impurities characteristics of steel making.
  • the manganese sulfides are perfectly distributed globular and the globular oxides are preferably encapsulated by calcium sulfides.
  • This steel has a double hardening, a primary hardening by hardening solid solution by insertion of Boron during austenitization and precipitation during the quenching of boro-carbides type M23 (B.C) 6; these very fine precipitates germinate during quenching very energetic at the grain boundaries of austenite due to their face-centered cubic structure of parameter a ⁇ 10.6 A °.
  • B.C boro-carbides type M23
  • These boro-carbides are in orientation relationship and in coherence with the austenite of one of the two grains.
  • This primary hardening is followed by a hardening secondary due to a dispersion mainly of carbides, nitrides, fine carbo-nitrides of Niobium homogeneously precipitated during an income.
  • the Niobium an essential dispersoid element, introduced into the part of the production of the steel according to the invention intervenes in the control of grain size, both during reheating and during phenomena recrystallization; it increases the hardenability of the steel according to the invention and causes hardening by precipitation.
  • the role of Niobium combined with that of Boron is fundamental in the development of steel according to the invention and for obtaining the characteristics mechanicals mentioned below.
  • the steel according to the invention has a peening ability chemical to machining, electro-erosive, excellent; he has a quality polishing ability (grain> 1200 followed by a diamond polishing of 8 ⁇ or even 3 ⁇ ) .It can be nitrided, hardness> 60 Rc.
  • thermo-mechanical transformation such as forging or rolling or molding in all cases.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP98401272A 1997-06-04 1998-05-28 Stahl für Formen grosser Abmessungen und Verfahren zu seiner Herstellung Expired - Lifetime EP0882808B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9707138A FR2764308B1 (fr) 1997-06-04 1997-06-04 Procede de fabrication d'un acier pour moules de grandes dimensions
FR9707138 1997-06-04

Publications (2)

Publication Number Publication Date
EP0882808A1 true EP0882808A1 (de) 1998-12-09
EP0882808B1 EP0882808B1 (de) 2002-01-23

Family

ID=9507783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401272A Expired - Lifetime EP0882808B1 (de) 1997-06-04 1998-05-28 Stahl für Formen grosser Abmessungen und Verfahren zu seiner Herstellung

Country Status (13)

Country Link
EP (1) EP0882808B1 (de)
CN (1) CN1079839C (de)
AR (1) AR015385A1 (de)
AT (1) ATE212385T1 (de)
AU (1) AU748866B2 (de)
BR (1) BR9814777A (de)
DE (1) DE69803514T2 (de)
ES (1) ES2170462T3 (de)
FR (1) FR2764308B1 (de)
HK (1) HK1019901A1 (de)
MY (1) MY120154A (de)
PT (1) PT882808E (de)
SG (1) SG63849A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1081245A1 (de) * 1999-08-31 2001-03-07 Sumitomo Metal Industries, Ltd. Wärmebeständiges Chrom-Molybdän Stahl
EP1251187A1 (de) * 2001-04-17 2002-10-23 Edelstahlwerke Buderus Ag Werkzeugstahl für Kunststoffformen
WO2003083154A1 (fr) * 2002-04-03 2003-10-09 Industeel (France) Bloc en acier pour la fabrication de moules pour le moulage par injection de matieres plastiques ou pour la fabrication d'outils pour le travail des metaux
WO2003083153A1 (fr) * 2002-04-03 2003-10-09 Industeel France Bloc en acier pour la fabrication de moules d'injection de matiere plastique ou pour la fabrication de pieces pour le travail des metaux
EP2123787A1 (de) * 2008-05-06 2009-11-25 Industeel Creusot Stahl mit hoher Widerstandsfähigkeit für massive Teile
WO2018004419A1 (en) * 2016-06-30 2018-01-04 Uddeholms Ab A steel for a tool holder
EP3569719A1 (de) * 2018-05-15 2019-11-20 Daido Steel Co.,Ltd. Stahl für druckgiessform sowie druckgiessform

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5412851B2 (ja) * 2009-01-29 2014-02-12 大同特殊鋼株式会社 プラスチック成形金型用鋼およびプラスチック成形金型
CN102787206B (zh) * 2012-08-06 2014-12-10 攀钢集团江油长城特殊钢有限公司 控制中碳含铬模具钢钢锭中氮含量的冶炼方法
CN103774047B (zh) * 2012-10-20 2017-03-01 大同特殊钢株式会社 具有优异的热导性、镜面抛光性和韧性的成型模具用钢
CN105839011A (zh) * 2016-04-08 2016-08-10 太仓市沪太热处理厂 一种大尺寸冷作模具钢及其热处理工艺
CN106987769B (zh) * 2017-03-29 2018-08-03 苏州浩焱精密模具有限公司 一种高硬度精密蚀刻刀模
CN108893682B (zh) * 2018-08-01 2020-10-09 攀钢集团攀枝花钢铁研究院有限公司 模具钢钢坯及其制备方法
CN112501447A (zh) * 2020-11-16 2021-03-16 山西太钢不锈钢股份有限公司 一种18CrNiMo7-6钢的冶炼方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2000542A1 (de) * 1968-01-22 1969-09-12 Nippon Kokan Kk
EP0431557A1 (de) * 1989-12-06 1991-06-12 Daido Tokushuko Kabushiki Kaisha Sehr gut schweissbarer Stahl zur Verwendung als Form bei der Herstellung von Kunststoffgegenständen
EP0508237A1 (de) * 1991-04-08 1992-10-14 Bethlehem Steel Corporation Mehrphasiges mikrolegiertes Stahl
EP0648853A1 (de) * 1993-04-05 1995-04-19 Nippon Steel Corporation Wärmeunbehandelter stahl zum warmschmieden, verfahren zur herstellung eines daraus hergestellten schmiedestückes und schmiedestück

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2000542A1 (de) * 1968-01-22 1969-09-12 Nippon Kokan Kk
EP0431557A1 (de) * 1989-12-06 1991-06-12 Daido Tokushuko Kabushiki Kaisha Sehr gut schweissbarer Stahl zur Verwendung als Form bei der Herstellung von Kunststoffgegenständen
EP0508237A1 (de) * 1991-04-08 1992-10-14 Bethlehem Steel Corporation Mehrphasiges mikrolegiertes Stahl
EP0648853A1 (de) * 1993-04-05 1995-04-19 Nippon Steel Corporation Wärmeunbehandelter stahl zum warmschmieden, verfahren zur herstellung eines daraus hergestellten schmiedestückes und schmiedestück

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1081245A1 (de) * 1999-08-31 2001-03-07 Sumitomo Metal Industries, Ltd. Wärmebeständiges Chrom-Molybdän Stahl
US6358336B1 (en) 1999-08-31 2002-03-19 Sumitomo Metal Industries, Ltd. Heat resistance Cr-Mo alloy steel
EP1251187A1 (de) * 2001-04-17 2002-10-23 Edelstahlwerke Buderus Ag Werkzeugstahl für Kunststoffformen
WO2002083965A1 (de) * 2001-04-17 2002-10-24 Edelstahlwerke Buderus Ag Werkzeugstahl für kunststofformen
FR2838138A1 (fr) * 2002-04-03 2003-10-10 Usinor Acier pour la fabrication de moules d'injection de matiere plastique ou pour la fabrication de pieces pour le travail des metaux
WO2003083153A1 (fr) * 2002-04-03 2003-10-09 Industeel France Bloc en acier pour la fabrication de moules d'injection de matiere plastique ou pour la fabrication de pieces pour le travail des metaux
WO2003083154A1 (fr) * 2002-04-03 2003-10-09 Industeel (France) Bloc en acier pour la fabrication de moules pour le moulage par injection de matieres plastiques ou pour la fabrication d'outils pour le travail des metaux
FR2838137A1 (fr) * 2002-04-03 2003-10-10 Usinor Acier pour la fabrication de moules pour le moulage par injection de matieres plastiques ou pour la fabrication d'outils pour le travail des metaux
AU2003258841B2 (en) * 2002-04-03 2008-05-29 Industeel France Bulk steel for the production of injection moulds for plastic material or for the production of pieces for working metals
EP2123787A1 (de) * 2008-05-06 2009-11-25 Industeel Creusot Stahl mit hoher Widerstandsfähigkeit für massive Teile
WO2009141556A1 (fr) * 2008-05-06 2009-11-26 Industeel Creusot Acier à hautes caractéristiques pour pièces massives
US9103008B2 (en) 2008-05-06 2015-08-11 Industeel Creusot High-characteristic steel for large-size parts
WO2018004419A1 (en) * 2016-06-30 2018-01-04 Uddeholms Ab A steel for a tool holder
US11085108B2 (en) 2016-06-30 2021-08-10 Uddeholms Ab Steel for a tool holder
EP3569719A1 (de) * 2018-05-15 2019-11-20 Daido Steel Co.,Ltd. Stahl für druckgiessform sowie druckgiessform

Also Published As

Publication number Publication date
FR2764308A1 (fr) 1998-12-11
EP0882808B1 (de) 2002-01-23
DE69803514T2 (de) 2002-08-29
SG63849A1 (en) 1999-03-30
CN1215762A (zh) 1999-05-05
DE69803514D1 (de) 2002-03-14
BR9814777A (pt) 2000-10-24
FR2764308B1 (fr) 1999-07-23
MY120154A (en) 2005-09-30
ES2170462T3 (es) 2002-08-01
AU748866B2 (en) 2002-06-13
HK1019901A1 (en) 2000-03-03
CN1079839C (zh) 2002-02-27
PT882808E (pt) 2002-07-31
AU6981098A (en) 1998-12-10
ATE212385T1 (de) 2002-02-15
AR015385A1 (es) 2001-05-02

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