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EP0739993B2 - Stahl und Verfahren zur Herstellung von Bauteilen mit hoher Abriebfestigkeit - Google Patents

Stahl und Verfahren zur Herstellung von Bauteilen mit hoher Abriebfestigkeit Download PDF

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Publication number
EP0739993B2
EP0739993B2 EP96400737A EP96400737A EP0739993B2 EP 0739993 B2 EP0739993 B2 EP 0739993B2 EP 96400737 A EP96400737 A EP 96400737A EP 96400737 A EP96400737 A EP 96400737A EP 0739993 B2 EP0739993 B2 EP 0739993B2
Authority
EP
European Patent Office
Prior art keywords
steel
temperature
less
chemical composition
boron
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
EP96400737A
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English (en)
French (fr)
Other versions
EP0739993B1 (de
EP0739993A1 (de
EP0739993B8 (de
Inventor
Jean Beguinot
Jean-Georges Brisson
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 Creusot
Original Assignee
Industeel France SAS
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
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Application filed by Industeel France SAS filed Critical Industeel France SAS
Publication of EP0739993A1 publication Critical patent/EP0739993A1/de
Publication of EP0739993B1 publication Critical patent/EP0739993B1/de
Publication of EP0739993B2 publication Critical patent/EP0739993B2/de
Application granted granted Critical
Publication of EP0739993B8 publication Critical patent/EP0739993B8/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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • 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

Definitions

  • the present invention relates to steels for the manufacture of parts with high resistance to abrasion.
  • the object of the present invention is to remedy this disadvantage in proposing a steel to make parts, and in particular sheet metal, easily weldable and cuttable, and having a abrasion resistance comparable to that of the parts according to the prior art.
  • the chemical composition of the steel comprises: 0.24% ⁇ C ⁇ 0.27% 0% ⁇ Si ⁇ 1% 0% ⁇ Al ⁇ 1% 0.3% ⁇ Mn ⁇ 1.6% 0% ⁇ Ni ⁇ 2% 0.5% ⁇ Cr ⁇ 1.8% and satisfies relationships: 0.15% ⁇ Mo + W / 2 ⁇ 0.45% and 0.6% ⁇ Si + Al ⁇ 1%
  • the invention finally relates to an abrasion resistant part made of steel according to the invention having a martensitic structure or martensito-bainitic containing between 5% and 15% of austenite, and having a hardness between 400HB and 500HB.
  • Parts according to the invention, or manufactured by the process according to the invention can be used for the manufacture of parts wear and tear for equipment intended, in particular, for the operation of quarries and mines, public works, cement works, iron and steel to the tileries, brickworks or agriculture.
  • A remains lower than or equal to 3.7.
  • This steel because of its relatively low carbon content, has good weldability and good cutting ability by thermal means, but its resistance to abrasion depends on its micrographic structure and therefore the heat treatment to which it is subjected.
  • this steel has a structure consisting mainly of martensite or a mixture of martensite and bainite (martensito-bainitic structure) and from 5% to 15% retained austenite enriched in carbon, so as to have a hardness between 450HB and 500HB, its resistance to abrasion was very comparable to that of martensitic steels of hardness greater than 550HB and its ability to form by cold deformation plastic was much better.
  • the good resistance to abrasion results from that, under the action of abrasive particles, the retained austenite is transformed locally in very hard martensite while benefiting from the ability to deforming the metal in a significant way.
  • the presence of a fine dispersion of chromium and molybdenum carbides in the constituent martensitic improves wear resistance.
  • the inventors have also found that, to obtain this structure, it was necessary to austenitize the steel by heating above Ac 3 , then cool to room temperature so that the cooling rate between the austenitization temperature and 450 ° C is greater than 1 ° C / s, and the time of passage of the temperature from 450 ° C to the temperature of 200 ° C is between 50s and 60mn, and preferably between 100s and 30mn.
  • This heat treatment may optionally be supplemented by an income at a temperature below 250 ° C for a time of less than 3 hours.
  • a steel according to the invention is produced, it is cast in the form of a half product which is then shaped by hot plastic deformation, for example by rolling or forging.
  • the part thus obtained is then austenitized by heating above Ac 3 , and then cooled to room temperature so that, at any point, the cooling rate between the austenitization temperature and 450 ° C is greater than 1 ° C / s, and the time of passage of the temperature from 450 ° C to the temperature of 200 ° is between 50s and 60mn, and preferably between 100s and 30mn.
  • the part is subjected to an income at a temperature below 250 ° C for a time less than 3 hours.
  • the slow-speed traverse of the 450 ° C / 200 ° C range is intended to effect of allowing the retention of metastable austenite, while promoting the formation of fine chromium and molybdenum carbides, distributed homogeneous in the martensitic or martensito-bainitic component.
  • the austenitization temperature can soak the piece in oil. This is particularly the case when the room is a sheet of thickness between 10mm and 100mm.
  • sheets have been manufactured with steels A and B according to the invention, and with the steels C and D according to the prior art.
  • compositions of these steels were, in thousandths of a% by weight: VS Yes al mn Or Cr MB B AT 247 817 63 1290 495 726 328 2.8 B 251 263 704 1305 439 715 342 2.6 VS 254 310 65 1329 445 702 351 2.6 D 415 307 62 1285 293 712 349 2.7
  • the sheet TD has a structure completely martensitic, a hardness higher than 550HB and an index of abrasion resistance of 100; but because of the carbon content of steel, it is difficult to weld.
  • the sheet TA3 made of steel according to the invention, has been soaked in water, which gives it a structure different from that which is required by the invention, and has an abrasion resistance index of 70, significantly lower than those of plates TA1, TA2 and TB in accordance with the invention, which are comparable to that of the reference sheet TD.
  • the plates TA1 and TB are also distinguished from the sheet metal TD by their folding ability;
  • the plates TA1 and TB can be folded on a radius equal to 6 times the thickness, while the TD sheet can not be bent on a radius less than 15 times the thickness.
  • parts in general, and sheet metal in particular, according to the invention are particularly suitable for manufacture of any type of wear part subject to severe abrasion and incorporated, in particular, in equipment for handling products in bulk in all types of industries.
  • these parts can to be attack blades and reinforcement pads under blades of buckets of loaders / carriers or shovels, guide-chain plates excavators and draglines, racks, crowns of training, sprockets, side shields of crushers to percussion or jaws, sieve grids for use in the work public, in quarry or gravel pit development; funds and squeegees of chain conveyors, shields of hoppers or corridors, scales of helical descenders, combs of sludge packs of classifiers, parts of slaughter or transport machinery, cyclone skirts for mining or coal mining; of the shields of hoppers or skips, clamshell blades, funds of coke-cars, vibrating extractors, chamber armor shot blasting, guiding or shifting

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Physical Vapour Deposition (AREA)

Claims (9)

  1. Stahl zur Herstellung von Bauteilen mit hoher Abriebfestigkeit, dadurch gekennzeichnet, dass er die folgende chemische Zusammensetzung in Gewichtsprozenten aufweist: 0,24% ≤ C ≤ 0,3% 0% ≤ Si ≤ 2% 0% ≤ Al ≤ 2% 0% ≤ Mn ≤ 2% 0% ≤ Ni ≤ 4% 0% ≤ Cr ≤ 3% 0% ≤ Mo ≤ 0,6% 0% ≤ W ≤ 1,2% ggf. 0,0005% bis 0,005% Bor, ggf. wenigstens ein Element das ausgewählt ist aus Nb, V, Zr und Ti mit Anteilen von weniger als 0,3%, ggf. wenigstens ein Element das ausgewählt ist aus Se, Te, Ca, Bi und Pb mit Anteilen von weniger als 0,1%, Rest Eisen und aus der Verarbeitung stammende Verunreinigungen,
    wobei diese chemische Zusammensetzung außerdem die folgenden Bedingungen erfüllt: 0,6% ≤ Al+Si ≤ 2% und zum Zweck einer ausreichenden Härtung 4,6xC+1,05xMn+0,54xNi+0,66x(Mo+W/2)+0,5xCr+K ≥ 1,6 mit
       K = 0 wenn der Stahl weniger als 0,0005% Bor enthält
       K = 0,5 wenn der Stahl mehr als 0,0005% Bor enthält,
    wobei der Stahl eine Martensit-Struktur oder eine Martensit-Bainit-Struktur aufweist, die 5% bis 15% Austenit enthält und die eine Härte zwischen 400HB und 500HB aufweist.
  2. Stahl nach Anspruch 1, dadurch gekennzeichnet, dass die chemische Zusammensetzung in Gewichtsprozenten aufweist: 0,24% ≤ C ≤ 0,27% 0% ≤ Si ≤ 1% 0% ≤ Al ≤ 1% 0,3% ≤ Mn ≤ 1,6% 0% ≤ Ni ≤ 2% 0,5% ≤ Cr ≤ 1,8% wobei die chemische Zusammensetzung im übrigen die folgenden Bedingungen erfüllt: 0,15% ≤ Mo + W/2 ≤ 0,45% und 0,6% ≤ Si + Al ≤ 1%
  3. Stahl nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass die chemische Zusammensetzung außerdem die folgende Beziehung erfüllt: 4,6xC+1,05xMn+0,54xNi+0,66x(Mo+W/2)+0,5xCr+K ≤ 3,7 mit
       K = 0 wenn der Stahl weniger als 0,0005% Bor enthält
       K = 0,5 wenn der Stahl mehr als 0,0005% Bor enthält.
  4. Verfahren zur Herstellung eines Bauteils aus Stahl mit hoher Abriebfestigkeit, dadurch gekennzeichnet, dass
    ein Bauteil hergestellt wird aus einem Stahl nach einem der Ansprüche 1 bis 3;
    das Bauteil durch Erwärmung auf einen Wert oberhalb von Ac3 austenisiert wird, danach auf die Umgebungstemperatur derart abgekühlt wird, dass an jeder Stelle des Bauteils die Abkühlgeschwindigkeit zwischen der Austenisierungstemperatur und 450°C oberhalb von 1°C/s liegt und die Übergangszeit der Temperatur von 450°C auf eine Temperatur von 200°C zwischen 50s und 60mn und vorzugsweise zwischen 100s und 30mn liegt;
    ggf. auf eine Temperatur von weniger als 250°C während einer Zeit von weniger als 3 Stunden zurückgekehrt wird.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass zur Abkühlung des Bauteils auf die Umgebungstemperatur ausgehend von der Austenisierungstemperatur das Bauteil in Öl getaucht wird.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass das Bauteil ein Blech ist, dessen Dicke zwischen 10 mm und 100 mm liegt.
  7. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass zur Abkühlung des Bauteils auf die Umgebungstemperatur, ausgehend von der Austenisierungstemperatur, das Bauteil in Luft getaucht wird.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass das Bauteil ein Blech ist mit einer Dicke zwischen 2 mm und 20 mm.
  9. Bauteil hoher Abriebfestigkeit, dadurch gekennzeichnet, dass es aus einem Stahl nach einem der Ansprüche 1 bis 3 besteht.
EP96400737A 1995-04-27 1996-04-05 Stahl und Verfahren zur Herstellung von Bauteilen mit hoher Abriebfestigkeit Expired - Lifetime EP0739993B8 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9505016A FR2733516B1 (fr) 1995-04-27 1995-04-27 Acier et procede pour la fabrication de pieces a haute resistance a l'abrasion
FR9505016 1995-04-27

Publications (4)

Publication Number Publication Date
EP0739993A1 EP0739993A1 (de) 1996-10-30
EP0739993B1 EP0739993B1 (de) 1999-12-01
EP0739993B2 true EP0739993B2 (de) 2005-11-23
EP0739993B8 EP0739993B8 (de) 2006-03-08

Family

ID=9478471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400737A Expired - Lifetime EP0739993B8 (de) 1995-04-27 1996-04-05 Stahl und Verfahren zur Herstellung von Bauteilen mit hoher Abriebfestigkeit

Country Status (11)

Country Link
US (1) US5714116A (de)
EP (1) EP0739993B8 (de)
JP (1) JP4058562B2 (de)
KR (1) KR100204545B1 (de)
AT (1) ATE187207T1 (de)
AU (1) AU692377B2 (de)
BR (1) BR9602054A (de)
DE (1) DE69605350T3 (de)
ES (1) ES2141446T5 (de)
FR (1) FR2733516B1 (de)
ZA (1) ZA963295B (de)

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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
DE10235219A1 (de) * 2002-08-01 2004-02-19 K.B.P. Kettenwerk Becker-Prünte Gmbh Stahl mit hoher Festigkeit und gleichzeitig guter Zähigkeit
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
FR2847272B1 (fr) * 2002-11-19 2004-12-24 Usinor Procede pour fabriquer une tole en acier resistant a l'abrasion et tole obtenue
DK1664357T3 (da) * 2003-09-09 2008-02-11 Pewag Austria Gmbh Anvendelse af et stål til fremstilling af kæder, fremgangsmåde til fremstilling af en kæde og kæde fremstillet ifölge denne fremgangsmåde
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EP2390530B1 (de) * 2010-05-31 2012-03-28 iwis motorsysteme GmbH & Co. KG Gelenkkette mit Kettenlaschen aus Bor-Mangan-Stahl
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JP5683327B2 (ja) * 2011-03-07 2015-03-11 Ｊｆｅスチール株式会社 低温靭性に優れた耐摩耗鋼板
CN103459635B (zh) 2011-03-29 2016-08-24 杰富意钢铁株式会社 耐应力腐蚀开裂性优异的耐磨损钢板及其制造方法
US9938599B2 (en) 2011-03-29 2018-04-10 Jfe Steel Corporation Abrasion resistant steel plate or steel sheet excellent in resistance to stress corrosion cracking and method for manufacturing the same
EP2662462A1 (de) * 2012-05-07 2013-11-13 Valls Besitz GmbH Niedertemperatur-härtbare Stahle mit ausgezeichneter Bearbeitbarkeit
US9982331B2 (en) 2012-09-19 2018-05-29 Jfe Steel Corporation Abrasion resistant steel plate having excellent low-temperature toughness and excellent corrosive wear resistance
CN102978531B (zh) * 2012-11-09 2015-07-15 宁波嘉达精密铸造有限公司 挖掘机斗齿及其制备方法
DE202013012601U1 (de) 2013-07-03 2017-11-28 J. D. Theile Gmbh & Co. Kg Kettenglied für Bergbauanwendungen
CN103486428B (zh) * 2013-09-29 2016-01-20 苏州市凯业金属制品有限公司 一种抗腐蚀u型金属管
KR102205618B1 (ko) * 2013-12-26 2021-01-21 두산인프라코어 주식회사 건설기계 버켓 부품용 주강 및 이를 포함하는 건설기계 버켓용 부품
CN103834771B (zh) * 2014-03-07 2015-10-28 湖州市千金宝云机械铸件有限公司 耐磨铸钢的热处理方法
CN104694855B (zh) * 2015-03-20 2017-06-23 苏州路云机电设备有限公司 一种用于驶入式货架的高强度钢板及其热处理工艺
CN104805377B (zh) * 2015-05-08 2017-04-19 南京理工大学 一种低合金超高强度钢及其制备方法
CN106854738A (zh) * 2015-12-08 2017-06-16 重庆葛利兹模具技术有限公司上海分公司 一种易切削塑料模具钢及其热处理方法
KR20210142164A (ko) * 2019-03-27 2021-11-24 에스코 그룹 엘엘씨 굴착 버킷용 립
KR102314432B1 (ko) * 2019-12-16 2021-10-19 주식회사 포스코 저온 충격인성이 우수한 고경도 내마모강 및 이의 제조방법
CN111074151B (zh) * 2019-12-19 2021-09-03 宁国东方碾磨材料股份有限公司 一种高性能中碳低合金挖掘机齿座
KR102498155B1 (ko) * 2020-12-18 2023-02-08 주식회사 포스코 저온 충격인성이 우수한 고경도 방탄강 및 이의 제조방법
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Also Published As

Publication number Publication date
DE69605350T3 (de) 2006-07-27
ZA963295B (en) 1996-11-06
JP4058562B2 (ja) 2008-03-12
KR960037857A (ko) 1996-11-19
AU5064896A (en) 1996-11-07
AU692377B2 (en) 1998-06-04
US5714116A (en) 1998-02-03
JPH08295990A (ja) 1996-11-12
DE69605350D1 (de) 2000-01-05
ES2141446T5 (es) 2006-06-01
KR100204545B1 (ko) 1999-06-15
FR2733516B1 (fr) 1997-05-30
EP0739993B1 (de) 1999-12-01
DE69605350T2 (de) 2000-08-24
EP0739993A1 (de) 1996-10-30
BR9602054A (pt) 1999-10-13
FR2733516A1 (fr) 1996-10-31
ATE187207T1 (de) 1999-12-15
EP0739993B8 (de) 2006-03-08
ES2141446T3 (es) 2000-03-16

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