EP0709481A1 - Niedrig legierter Stahl zur Herstellung von Spritzformen für plastische Werkstoffe oder für Gegenstände aus Gummi - Google Patents

Niedrig legierter Stahl zur Herstellung von Spritzformen für plastische Werkstoffe oder für Gegenstände aus Gummi Download PDF

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Publication number
EP0709481A1
EP0709481A1 EP95402230A EP95402230A EP0709481A1 EP 0709481 A1 EP0709481 A1 EP 0709481A1 EP 95402230 A EP95402230 A EP 95402230A EP 95402230 A EP95402230 A EP 95402230A EP 0709481 A1 EP0709481 A1 EP 0709481A1
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EP
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Prior art keywords
steel
alloy steel
low alloy
manufacture
chemical composition
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Granted
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EP95402230A
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English (en)
French (fr)
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EP0709481B1 (de
Inventor
Jean Beguinot
Frédéric Chenou
Gilbert Primon
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.)
Industeel France SAS
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Creusot Loire SA
Creusot Loire Industrie SA
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Application filed by Creusot Loire SA, Creusot Loire Industrie SA filed Critical Creusot Loire SA
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    • 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
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron

Definitions

  • the present invention relates to a low alloy steel used in particular for the manufacture of molds for plastics or for rubber.
  • the molds for plastics or for rubber are produced by machining massive metal blocks whose thickness can exceed 500mm.
  • the surface of the impression obtained by machining is most often either polished or chemically grained in order to give the objects obtained by molding the desired surface appearance.
  • any point on their surface must have a high hardness of between 250HB and 400HB and most often between 270HB and 350HB. They must also have the highest possible elastic limit and good resilience to resist shock and deformation.
  • the machining operation being very important, since it commonly represents 70% of the total cost of manufacturing the mold, the metal must be as machinable as possible and, very often, the aptitude for machining cannot be obtained by conventional additions which are too large, such as sulfur or lead, since these additions deteriorate the ability to polish or to emboss.
  • the metal used must also be as weldable as possible.
  • the metal used must have the highest possible thermal conductivity in order to facilitate heat transfers which limit the productivity of the production of molded objects.
  • blocks of low-alloy steel which are sufficiently quenching are generally used to obtain, after quenching and tempering, a martensitic or martensitic-bainitic structure having sufficient hardness, a high elastic limit, good toughness.
  • the most used steel is steel P20 according to the AISI standard or steels W1.2311 or W1.2738 according to the German standard WERKSTOFF.
  • Steel P20 contains, by weight, from 0.28% to 0.4% of Carbon, from 0.2% to 0.8% of Silicon, from 0.6% to 1% of Manganese, from 1.4 % at 2% chromium, from 0.3% to 0.55% molybdenum, the rest being iron and impurities linked to the production.
  • W1.2311 and W1.2738 steels contain, by weight, from 0.35% to 0.45% of Carbon, from 0.2% to 0.4% of Silicon, from 1.3% to 1.6% Manganese, 1.8% to 2.10% Chromium and 0.15% to 0.25% Molybdenum; W1.2738 steel also contains 0.9% to 1.2% Nickel, the rest being iron and impurities linked to the production.
  • This steel which certainly has good weldability and acceptable machinability, however has insufficient thermal conductivity.
  • the object of the invention is to provide a steel for the manufacture of molds for plastics or for rubber which, while having at least the same mechanical properties and the ability to machine known steels, has a higher thermal conductivity. at 40W / m / K to allow in particular to manufacture molds entirely of steel.
  • the subject of the invention is a low-alloy steel intended for the manufacture of molds for plastics or for rubber, the chemical composition of which comprises by weight: 0.24% ⁇ C ⁇ 0.35% 1% ⁇ Mn ⁇ 2.5% 0.3% ⁇ Cr ⁇ 2.5% 0.1% ⁇ Mo + W / 2 ⁇ 0.8% 0% ⁇ Ni ⁇ 2.5% 0% ⁇ V ⁇ 0.3% If ⁇ 0.5% 0.002% ⁇ B ⁇ 0.005% 0.005% ⁇ Al ⁇ 0.1% 0% ⁇ Ti ⁇ 0.1% P ⁇ 0.02%
  • the steel contains, 0.24% ⁇ C ⁇ 0.28% 1% ⁇ Mn ⁇ 1.3% 1% ⁇ Cr ⁇ 1.5% 0.3% ⁇ Mo + W / 2 ⁇ 0.4% 0.03% ⁇ V ⁇ 0.1%
  • the steel preferably, should contain less than 0.1% silicon.
  • Copper can also be added in order to obtain additional hardening during tempering, the steel must then contain from 0.8% to 2% of Nickel and from 0.5% to 2.5% of Copper.
  • the hardness can be improved by additions of Niobium, in contents lower than 0.1% and the machinability can be improved by additions of Sulfur, Tellurium, Selenium, Bismuth, Calcium, Antimony, Lead, Indium, Zirconium or Earths rare in contents lower than 0.1%.
  • the invention also relates to the use of a steel according to the invention for the manufacture by machining of quenched quenched steel blocks whose hardness is between 270HB and 350HB.
  • FIG. 1 represents a diagram for measuring machinability in drilling according to the Taylor method.
  • the steel contains or may contain elements such as Silicon, Copper, Nickel either as impurities or as elements of complementary alloy.
  • Copper can also be added to produce a structural hardening effect.
  • the copper content must be between 0.5% and 2% and be accompanied by a nickel content between 0.8% and 2.5%.
  • the hardness can also be adjusted by additions of Niobium in contents of less than 0.1%.
  • the machinability can be improved by adding Sulfur, Tellurium, Selenium, Bismuth, Calcium, Antimony, Lead, Indium, Zirconium or Rare earths in contents lower than 0 , 1%.
  • the chemical composition must be chosen so that U ⁇ 200 and R ⁇ 25.
  • the thermal conductivity is then greater than 40W / m / K
  • a steel is produced according to the invention, optionally by pre-oxidation with silicon, then deoxidation with aluminum, then titanium and boron are added.
  • the liquid metal thus obtained is poured in the form of a semi-finished product such as an ingot, a slab or a billet.
  • the semi-finished product is then reheated to a temperature preferably below 1300 ° C. and either forged or rolled to obtain a bar or a sheet.
  • the bar or the sheet is then quenched to obtain a martensitic or martensito-bainitic structure in all its mass.
  • the quenching can be done either directly in the hot rolling or forging if the end of rolling or end of forging temperature is less than 1000 ° C, or after austenitization at a temperature above the Ac3 point and preferably less than 1000 ° C.
  • the bars or sheets After quenching in air, oil or water depending on the dimensions, the bars or sheets are subjected to tempering above 500 ° C and preferably above 550 ° C so as to obtain a hardness between 270HB and 350HB, and preferably close to 300HB, at all points of the bars or sheets and so that the internal stresses generated by the quenching are relaxed.
  • blocks of the desired size are cut which are machined so as in particular to form the imprint of the object which it is desired to obtain by molding.
  • the surface of the impression can then be subjected to a surface treatment such as polishing or embossing to give it the desired surface appearance and possibly be nitrided or chromed.
  • a surface treatment such as polishing or embossing to give it the desired surface appearance and possibly be nitrided or chromed.
  • the difference in machinability index U results in a difference in machinability as shown in fig. 1 which represents Taylor lines in drilling for steel A and for steel P20 taken example. It can be seen in this figure that at equal cutting speed, the length that can be drilled in steel A is approximately 10 times greater than in steel P20, or, that with equal drilled length, the speed of permissible cut is 25% greater in steel A than in steel P20.
  • the weldability being all the better when the equivalent carbon or the BH coefficient is low, it is found that the steel according to the invention has better weldability than the P20 steel.
  • steel A has a thermal conductivity 17% higher than that of steel P20, moreover it has an elastic limit and a resilience markedly higher than that of steel P20.
  • the block After austenitization at 900 ° C, quenching with water, and returned to 570 ° C, the block had a hardness close to 300HB throughout the mass and:
  • This steel has a BH index better than that of steel A but it has a worse equivalent Carbon. Its machinability index is comparable to that of steel A but its thermal conductivity is 15% lower.
  • Blocks of 400mm thick made of steel B according to the invention were also made, austenitized at 920 ° C., quenched with water and returned to 560 ° C. then cooled in air.
  • the hardness at all points was between 300HB and 315HB.
  • the elastic limit Re was 878MPa, and the breaking strength Rm was 969MPa, ie a Re / Rm ratio of 0.91.
  • This steel whose analysis differs from that of steel A mainly by the silicon and nickel content, has the same advantages as steel A and moreover, it has a much better thermal conductivity.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heat Treatment Of Steel (AREA)
  • Laminated Bodies (AREA)
EP95402230A 1994-10-31 1995-10-06 Niedrig legierter Stahl zur Herstellung von Spritzformen für plastische Werkstoffe oder für Gegenstände aus Gummi Expired - Lifetime EP0709481B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9413029A FR2726287B1 (fr) 1994-10-31 1994-10-31 Acier faiblement allie pour la fabrication de moules pour matieres plastiques ou pour caoutchouc
FR9413029 1994-10-31

Publications (2)

Publication Number Publication Date
EP0709481A1 true EP0709481A1 (de) 1996-05-01
EP0709481B1 EP0709481B1 (de) 2000-01-26

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ID=9468386

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EP95402230A Expired - Lifetime EP0709481B1 (de) 1994-10-31 1995-10-06 Niedrig legierter Stahl zur Herstellung von Spritzformen für plastische Werkstoffe oder für Gegenstände aus Gummi

Country Status (11)

Country Link
US (1) US5645794A (de)
EP (1) EP0709481B1 (de)
JP (1) JP3845805B2 (de)
CN (1) CN1049700C (de)
AT (1) ATE189269T1 (de)
CA (1) CA2161740C (de)
DE (1) DE69514755T2 (de)
ES (1) ES2144113T3 (de)
FR (1) FR2726287B1 (de)
PT (1) PT709481E (de)
TW (1) TW420721B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997034021A1 (de) * 1996-03-12 1997-09-18 Bayer Aktiengesellschaft Vorrichtung und verfahren zur herstellung von kunststoffteilen, insbesondere polyurethanformteilen
EP0725156B1 (de) * 1995-01-31 2001-07-18 USINOR INDUSTEEL (France) Stahl mit hoher Dehnbarkeit, Verfahren zur Herstellung und Verwendung
EP1251187A1 (de) * 2001-04-17 2002-10-23 Edelstahlwerke Buderus Ag Werkzeugstahl für Kunststoffformen
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
CN101857946A (zh) * 2010-06-22 2010-10-13 任昊 一种耐磨铸钢材料
EP2660348A1 (de) * 2010-12-27 2013-11-06 Hitachi Metals, Ltd. Gewalzter stahl mit hervorragender korrosionsfestigkeit und wärmeleitfähigkeit sowie herstellungsverfahren dafür
EP2644717A3 (de) * 2012-03-30 2017-05-31 Buderus Edelstahl Gmbh Vormaterial für Kunststoffformen oder Kunststoffform
CN110565009A (zh) * 2018-06-06 2019-12-13 中国科学院金属研究所 一种合金化的预硬性塑料模具钢及其制备方法

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FR2748037B1 (fr) * 1996-04-29 1998-05-22 Creusot Loire Acier reparable par soudure pour la fabrication de moules pour matieres plastiques
US5827376A (en) * 1996-07-19 1998-10-27 A. Finkl & Sons Co. Molds for plastic prototyping and isothermal forging of aluminum, steel therefor, and method of manufacturing thereof
US6200395B1 (en) 1997-11-17 2001-03-13 University Of Pittsburgh - Of The Commonwealth System Of Higher Education Free-machining steels containing tin antimony and/or arsenic
US6206983B1 (en) 1999-05-26 2001-03-27 University Of Pittsburgh - Of The Commonwealth System Of Higher Education Medium carbon steels and low alloy steels with enhanced machinability
US6478898B1 (en) * 1999-09-22 2002-11-12 Sumitomo Metal Industries, Ltd. Method of producing tool steels
KR20020031557A (ko) * 2000-10-21 2002-05-02 이계안 플라스틱 사출금형용 합금조성물
CN1498282A (zh) * 2001-03-23 2004-05-19 ס�ѽ�����ҵ��ʽ���� 铸钢与铸造金属模具
ITMI20011402A1 (it) * 2001-07-02 2003-01-02 Lucchini S P A Acciaio avente ottime proprieta' di lavorabilita' alle macchine utensili e dopo trattamento termico di indurimento ottime proprieta' meccani
FR2847271B1 (fr) * 2002-11-19 2004-12-24 Usinor Procede pour fabriquer une tole en acier resistant a l'abrasion et tole obtenue
FR2847270B1 (fr) 2002-11-19 2004-12-24 Usinor Procede pour fabriquer une tole en acier resistant a l'abrasion et tole obtenue
KR20050021756A (ko) * 2003-08-26 2005-03-07 현대자동차주식회사 고온사출 성형용 금형의 합금조성물
US20050079087A1 (en) * 2003-10-09 2005-04-14 Henn Eric D. Steel alloy for injection molds
JP4259347B2 (ja) * 2004-02-19 2009-04-30 住友金属工業株式会社 高強度非調質継目無鋼管の製造方法
CN1317417C (zh) * 2005-05-17 2007-05-23 上海大学 汽车覆盖件模具用合金灰铁材料及其制备方法
KR100836699B1 (ko) * 2005-10-27 2008-06-10 히타치 긴조쿠 가부시키가이샤 금형용 강
US20080073006A1 (en) * 2006-09-27 2008-03-27 Henn Eric D Low alloy steel plastic injection mold base plate, method of manufacture and use thereof
JP5043529B2 (ja) * 2007-06-18 2012-10-10 株式会社日本製鋼所 鏡面性に優れたプラスチック成形金型用鋼
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US20140345756A1 (en) * 2013-05-21 2014-11-27 General Electric Company Martensitic alloy component and process of forming a martensitic alloy component
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CN103882323B (zh) * 2014-03-20 2016-06-29 马钢(集团)控股有限公司 MnCr合金化热成形用钢及其生产方法
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US10239245B2 (en) * 2016-02-01 2019-03-26 A. Finkl & Sons Co. Economical plastic tooling cores for mold and die sets
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US10760150B2 (en) 2018-03-23 2020-09-01 General Electric Company Martensitic alloy component and process of forming a martensitic alloy component
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
CN110484824A (zh) * 2019-09-23 2019-11-22 益阳金能新材料有限责任公司 一种耐磨合金钢及其制备方法
CN110747410A (zh) * 2019-10-28 2020-02-04 鞍钢股份有限公司 一种在酸性条件使用的耐蚀棒材及其制造方法
CN111893403B (zh) * 2020-07-30 2021-09-24 舞阳钢铁有限责任公司 一种提高中碳合金钢锭致密性的方法
US20220162730A1 (en) * 2020-11-20 2022-05-26 A. Finkl & Sons Co. Pre-hardened steel composition and machine parts made therewith
CN113528951A (zh) * 2021-06-25 2021-10-22 昆山伯仕途精密机械有限公司 一种家具塑料模具钢板及其制备方法
CN113502436B (zh) * 2021-06-30 2022-04-19 江苏省沙钢钢铁研究院有限公司 塑料模具钢板的生产方法及塑料模具钢板

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GB1020913A (en) * 1961-11-29 1966-02-23 Yawata Iron & Steel Co Low-alloy tough steel
US3418110A (en) * 1964-01-22 1968-12-24 Goda Susumu Hardenable steel material containing aluminum
GB2186594A (en) * 1986-02-13 1987-08-19 Hunting Oilfield Services Ltd Steel alloys
JPH05302117A (ja) * 1991-04-04 1993-11-16 Aichi Steel Works Ltd 熱間鍛造用焼入省略鋼の製造方法
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0725156B1 (de) * 1995-01-31 2001-07-18 USINOR INDUSTEEL (France) Stahl mit hoher Dehnbarkeit, Verfahren zur Herstellung und Verwendung
WO1997034021A1 (de) * 1996-03-12 1997-09-18 Bayer Aktiengesellschaft Vorrichtung und verfahren zur herstellung von kunststoffteilen, insbesondere polyurethanformteilen
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
CN1317416C (zh) * 2002-04-03 2007-05-23 法国安达斯戴乐公司 用于制造塑性材料注塑成型用的模具或用于制造金属加工部件的钢锭
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
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
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
CN101857946A (zh) * 2010-06-22 2010-10-13 任昊 一种耐磨铸钢材料
EP2660348A1 (de) * 2010-12-27 2013-11-06 Hitachi Metals, Ltd. Gewalzter stahl mit hervorragender korrosionsfestigkeit und wärmeleitfähigkeit sowie herstellungsverfahren dafür
EP2660348A4 (de) * 2010-12-27 2014-09-03 Hitachi Metals Ltd Gewalzter stahl mit hervorragender korrosionsfestigkeit und wärmeleitfähigkeit sowie herstellungsverfahren dafür
EP2644717A3 (de) * 2012-03-30 2017-05-31 Buderus Edelstahl Gmbh Vormaterial für Kunststoffformen oder Kunststoffform
CN110565009A (zh) * 2018-06-06 2019-12-13 中国科学院金属研究所 一种合金化的预硬性塑料模具钢及其制备方法
CN110565009B (zh) * 2018-06-06 2021-07-23 中国科学院金属研究所 一种合金化的预硬性塑料模具钢及其制备方法

Also Published As

Publication number Publication date
DE69514755T2 (de) 2000-08-10
FR2726287A1 (fr) 1996-05-03
FR2726287B1 (fr) 1997-01-03
CA2161740C (fr) 2005-06-14
CN1049700C (zh) 2000-02-23
JP3845805B2 (ja) 2006-11-15
PT709481E (pt) 2000-06-30
EP0709481B1 (de) 2000-01-26
US5645794A (en) 1997-07-08
ES2144113T3 (es) 2000-06-01
TW420721B (en) 2001-02-01
JPH08209298A (ja) 1996-08-13
CA2161740A1 (fr) 1996-05-01
DE69514755D1 (de) 2000-03-02
ATE189269T1 (de) 2000-02-15
CN1129744A (zh) 1996-08-28

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