EP0882808B1 - Acier pour moules de grandes dimensions et procédé de fabrication - Google Patents

Acier pour moules de grandes dimensions et procédé de fabrication Download PDF

Info

Publication number
EP0882808B1
EP0882808B1 EP98401272A EP98401272A EP0882808B1 EP 0882808 B1 EP0882808 B1 EP 0882808B1 EP 98401272 A EP98401272 A EP 98401272A EP 98401272 A EP98401272 A EP 98401272A EP 0882808 B1 EP0882808 B1 EP 0882808B1
Authority
EP
European Patent Office
Prior art keywords
ppm
steel
consumable electrode
niobium
ingot
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 - Lifetime
Application number
EP98401272A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0882808A1 (fr
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/fr
Application granted granted Critical
Publication of EP0882808B1 publication Critical patent/EP0882808B1/fr
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
    • C22C38/18—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

  • EP-A-431 557 discloses steel for large molds having a composition similar to that of invention and departure from steel invention by the lowest possible boron content.
  • 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.
  • 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.
  • This steel faces two fundamental properties for molds: polishability and granulability in large part linked to the homogeneity of its structure and level of its inclusive cleanliness.
  • 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)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
EP98401272A 1997-06-04 1998-05-28 Acier pour moules de grandes dimensions et procédé de fabrication Expired - Lifetime EP0882808B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=9507783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401272A Expired - Lifetime EP0882808B1 (fr) 1997-06-04 1998-05-28 Acier pour moules de grandes dimensions et procédé de fabrication

Country Status (13)

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

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3514182B2 (ja) 1999-08-31 2004-03-31 住友金属工業株式会社 高温強度と靱性に優れた低Ｃｒフェライト系耐熱鋼およびその製造方法
ATE244319T1 (de) * 2001-04-17 2003-07-15 Buderus Edelstahlwerke Ag Verwendung eines werkzeugstahles für kunststoffformen
FR2838138B1 (fr) * 2002-04-03 2005-04-22 Usinor Acier pour la fabrication de moules d'injection de matiere plastique ou pour la fabrication de pieces 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
EP2123787A1 (fr) 2008-05-06 2009-11-25 Industeel Creusot Acier à hautes caractéristiques pour pièces massives
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
TWI756226B (zh) * 2016-06-30 2022-03-01 瑞典商伍德赫爾恩股份有限公司 用於工具架之鋼
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
JP7167483B2 (ja) * 2018-05-15 2022-11-09 大同特殊鋼株式会社 ダイカスト金型用鋼及びダイカスト金型
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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3592633A (en) * 1968-01-22 1971-07-13 Nippon Kokan Kk High strength low alloy steel possessing sufficient weldability containing small amounts of nb,ti,and b
JP2881869B2 (ja) * 1989-12-06 1999-04-12 大同特殊鋼株式会社 溶接性にすぐれたプラスチック成形金型用鋼
US5213634A (en) * 1991-04-08 1993-05-25 Deardo Anthony J Multiphase microalloyed steel and method thereof
JP3139876B2 (ja) * 1993-04-05 2001-03-05 新日本製鐵株式会社 熱間鍛造用非調質鋼および非調質熱間鍛造品の製造方法ならびに非調質熱間鍛造品

Also Published As

Publication number Publication date
HK1019901A1 (en) 2000-03-03
MY120154A (en) 2005-09-30
FR2764308A1 (fr) 1998-12-11
CN1215762A (zh) 1999-05-05
AU6981098A (en) 1998-12-10
EP0882808A1 (fr) 1998-12-09
BR9814777A (pt) 2000-10-24
DE69803514D1 (de) 2002-03-14
ES2170462T3 (es) 2002-08-01
CN1079839C (zh) 2002-02-27
DE69803514T2 (de) 2002-08-29
PT882808E (pt) 2002-07-31
AU748866B2 (en) 2002-06-13
ATE212385T1 (de) 2002-02-15
AR015385A1 (es) 2001-05-02
FR2764308B1 (fr) 1999-07-23
SG63849A1 (en) 1999-03-30

Similar Documents

Publication Publication Date Title
EP0882808B1 (fr) Acier pour moules de grandes dimensions et procédé de fabrication
KR100451474B1 (ko) 플라스틱의 사출성형용 주형제조에 유용한 강
JP4189776B2 (ja) プラスチック材料用金型を製造するための低合金鋼
KR100934935B1 (ko) 플라스틱 재료용 사출 성형 몰드 또는 가공 금속용 부품을제조하기 위한 벌크 스틸
EP0725156A1 (fr) Acier à haute ductilité, procédé de fabrication et utilisation
KR100449942B1 (ko) 플라스틱용금형의제조를위한,용접으로수선가능한강철
RU2463373C2 (ru) Высокопрочная сталь для массивных деталей
US6238493B1 (en) Method of making a weathering grade plate and product thereform
US5415711A (en) High-strength spring steels and method of producing the same
CA2233830C (en) Tool for glass molding operations and method of manufacture thereof
KR101286121B1 (ko) 고온 내마모성 및 기계적 강도가 우수한 열간압연용 고탄소 단조 워크롤 및 이의 제조방법
KR20020066990A (ko) 플라스틱 몰드용 강 및 상기 강의 열 처리 방법
US20030131911A1 (en) Tool steel for plastic molds
EP1299569A1 (fr) Acier inoxydable ferritique utilisable pour des pieces ferromagnetiques
JP2001164337A (ja) 遅れ破壊特性の優れた高張力鋼材及びその製造方法
RU2279494C2 (ru) Инструментальная сталь высокой прочности, способ изготовления деталей из такой стали и готовые детали
JP2866113B2 (ja) 耐食性金型用鋼
JP2003003241A (ja) 高強度ばね用鋼線
JPS62238327A (ja) 加工性のすぐれた高強度鋼線材
KR940007279B1 (ko) 플라스틱 사출 금형용 합금
JP2003001307A (ja) 圧延ロール
KR910001111B1 (ko) 프리하든 금형강
JP2002363690A (ja) プラスチック成形金型用鋼
US20230160044A1 (en) Ferritic spheroidal graphite cast iron, differential case, and differential device
JPH0768609A (ja) 成形機用シリンダ及びその製造方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES GB IT LI NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 19990421

AKX Designation fees paid

Free format text: AT BE CH DE ES GB IT LI NL PT SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

RTI1 Title (correction)

Free format text: STEEL FOR BIG-SIZED MOULDS AND PROCESS FOR MANUFACTURING THE STEEL

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20010522

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES GB IT LI NL PT SE

REF Corresponds to:

Ref document number: 212385

Country of ref document: AT

Date of ref document: 20020215

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: BUGNION S.A.

REF Corresponds to:

Ref document number: 69803514

Country of ref document: DE

Date of ref document: 20020314

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020407

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20020422

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2170462

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050528

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20080505

Year of fee payment: 11

Ref country code: DE

Payment date: 20080613

Year of fee payment: 11

Ref country code: CH

Payment date: 20080515

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20080417

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20080617

Year of fee payment: 11

Ref country code: PT

Payment date: 20080417

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20080418

Year of fee payment: 11

Ref country code: NL

Payment date: 20080418

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20080506

Year of fee payment: 11

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20090501

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080521

Year of fee payment: 11

BERE Be: lapsed

Owner name: S.A. *THYSSEN FRANCE

Effective date: 20090531

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20091130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090528

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090531

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090528

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20091201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090528

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091201

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090531

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20090529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090528

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090529