EP1563105B1 - Procede pour fabriquer une tole en acier resistant a l'abrasion et tole obtenue - Google Patents

Procede pour fabriquer une tole en acier resistant a l'abrasion et tole obtenue Download PDF

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Publication number
EP1563105B1
EP1563105B1 EP03786006A EP03786006A EP1563105B1 EP 1563105 B1 EP1563105 B1 EP 1563105B1 EP 03786006 A EP03786006 A EP 03786006A EP 03786006 A EP03786006 A EP 03786006A EP 1563105 B1 EP1563105 B1 EP 1563105B1
Authority
EP
European Patent Office
Prior art keywords
plate
optionally
steel
process according
temperature
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
EP03786006A
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German (de)
English (en)
French (fr)
Other versions
EP1563105A1 (fr
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 Creusot
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 Industeel Creusot filed Critical Industeel Creusot
Priority to SI200331112T priority Critical patent/SI1563105T1/sl
Publication of EP1563105A1 publication Critical patent/EP1563105A1/fr
Application granted granted Critical
Publication of EP1563105B1 publication Critical patent/EP1563105B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • C21D1/19Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/14Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/001Austenite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/002Bainite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/008Martensite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals

Definitions

  • the present invention relates to an abrasion-resistant steel and its method of manufacture.
  • High abrasion resistant steels with a hardness of about 600 Brinell are known. These steels contain from 0.4% to 0.6% of carbon and from 0.5% to 3% of at least one alloying element such as manganese, nickel, chromium and molybdenum and are soaked to have a completely martensitic structure. But these steels are very difficult to weld and cut. To remedy these drawbacks, it has been proposed, particularly in EP 0 739 993 to use for the same purposes, a less hard steel, whose carbon content is about 0.27% and having a quenched structure containing a significant amount of residual austenite. But these steels are still difficult to weld or cut.
  • the object of the present invention is to overcome these disadvantages, by proposing an abrasion-resistant steel sheet whose abrasion resistance is comparable to that of known steels but whose weldability and thermal cutting ability is better.
  • quenching may be followed by tempering at a temperature below 350 ° C, and preferably below 250 ° C.
  • the invention also relates to a part, in particular a sheet, obtained in particular by this method, the steel having a martensitic or martensito-bainitic structure, said structure containing from 5% to 20% retained austenite, as well as carbides.
  • the thickness of the sheet may be between 2 mm and 150 mm and its flatness is characterized by an arrow less than or equal to 12 mm / m and preferably less than 5 mm / m.
  • the carbon, titanium, zirconium and nitrogen contents must be such that: C - Ti / 4 - Zr / 8 + 7xN / 8> 0.095%
  • C * represents the free carbon content after precipitation of the titanium and zirconium carbides, taking into account the formation of titanium and zirconium nitrides.
  • This free carbon content C * must be greater than 0.095%, and preferably ⁇ 0.12%, to have a martensite having a minimum hardness. The lower this content, the better the welding and thermal cutting ability.
  • the micrographic structure of the steel consists of martensite or bainite or a mixture of these two structures, and from 5% to 20% retained austenite.
  • This structure further comprises large titanium or zirconium carbides formed at high temperature, or even carbides of niobium, tantalum or vanadium.
  • the inventors have found that the effectiveness of large carbides for improving the abrasion resistance could be obelated by the premature loosening thereof and that this loosening could be avoided by the presence of metastable austenite which is transformed under the effect of abrasion phenomena.
  • the transformation of the metastable austenite is by swelling, this transformation in the abraded undercoat increases the resistance to carburetion and thus improves abrasion resistance.
  • the steel is made, it flows in the form of slab or ingot.
  • the slab or slug is hot-rolled to obtain a sheet which is subjected to a heat treatment which makes it possible at the same time to obtain the desired structure and a good flatness without subsequent planing or with limited planing.
  • the heat treatment can be carried out directly in the hot rolling or carried out later, and possibly after a cold planing or half-hot.
  • an expansion treatment such as tempering, can be carried out at a temperature of less than or equal to 350 ° C, and preferably less than 250 ° C.
  • steel sheets identified A to C according to the invention and D to E according to the prior art were produced.
  • the chemical compositions of the steels, expressed in 10 -3 % by weight, as well as the hardness and a wear resistance index Rus, are reported in Table 1.
  • the wear resistance is measured by the weight loss of a prismatic specimen rotated in a tank containing calibrated granules of quartzite for 5 hours.
  • the Rus index of a steel is equal to 100 times the ratio of the wear resistance of the steel in question and the wear resistance of a reference steel (steel D).
  • All sheets are 27 mm thick and are hardened after austenitization at 900 ° C.
  • the sheets according to the invention have a martensito-bainitic self-regenerating structure containing from 5% to 20% retained austenite and large titanium carbides, whereas the sheets given for comparison have a completely martensitic structure.
  • the comparison of the wear resistances and the hardnesses shows that, although being very substantially less hard than the sheets given for comparison, the sheets according to the invention have a slightly better resistance to wear.
  • the comparison of the free carbons shows that the good abrasion resistance of the sheets according to the invention is obtained with very significantly lower free carbons, which leads to significantly better welding or thermal cutting abilities than for the sheets according to the invention. the prior art.
  • the deformation after cooling, without planing, for steels according to the invention A to C is about 5 mm / m and 16 mm / m for steels D and E given for comparison.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Heat Treatment Of Articles (AREA)
EP03786006A 2002-11-19 2003-11-13 Procede pour fabriquer une tole en acier resistant a l'abrasion et tole obtenue Expired - Lifetime EP1563105B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200331112T SI1563105T1 (sl) 2002-11-19 2003-11-13 Postopek za izdelavo plocevine iz jekla, odpornega proti abraziji, in dobljena plocevina

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0214426 2002-11-19
FR0214426A FR2847272B1 (fr) 2002-11-19 2002-11-19 Procede pour fabriquer une tole en acier resistant a l'abrasion et tole obtenue
PCT/FR2003/003358 WO2004048619A1 (fr) 2002-11-19 2003-11-13 Procede pour fabriquer une tole en acier resistant a l'abrasion et tôle obtenue

Publications (2)

Publication Number Publication Date
EP1563105A1 EP1563105A1 (fr) 2005-08-17
EP1563105B1 true EP1563105B1 (fr) 2008-01-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03786006A Expired - Lifetime EP1563105B1 (fr) 2002-11-19 2003-11-13 Procede pour fabriquer une tole en acier resistant a l'abrasion et tole obtenue

Country Status (19)

Country Link
US (1) US7713362B2 (ja)
EP (1) EP1563105B1 (ja)
JP (1) JP4535876B2 (ja)
KR (1) KR101010571B1 (ja)
CN (1) CN100348738C (ja)
AR (1) AR042073A1 (ja)
AT (1) ATE382716T1 (ja)
AU (1) AU2003295014B2 (ja)
BR (1) BR0315693B1 (ja)
CA (1) CA2506349C (ja)
DE (1) DE60318478T2 (ja)
ES (1) ES2298605T3 (ja)
FR (1) FR2847272B1 (ja)
PE (1) PE20040484A1 (ja)
PL (1) PL202086B1 (ja)
RU (1) RU2326179C2 (ja)
UA (1) UA78624C2 (ja)
WO (1) WO2004048619A1 (ja)
ZA (1) ZA200504150B (ja)

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FR2733516B1 (fr) * 1995-04-27 1997-05-30 Creusot Loire Acier et procede pour la fabrication de pieces a haute resistance a l'abrasion
JPH09249935A (ja) * 1996-03-13 1997-09-22 Sumitomo Metal Ind Ltd 耐硫化物応力割れ性に優れる高強度鋼材とその製造方法
CN1182142A (zh) * 1996-11-07 1998-05-20 鞍山钢铁集团公司 一种耐磨铸钢
JP3975852B2 (ja) * 2001-10-25 2007-09-12 Jfeスチール株式会社 加工性に優れた鋼管およびその製造方法
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

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DE60318478D1 (de) 2008-02-14
RU2005119205A (ru) 2006-05-10
EP1563105A1 (fr) 2005-08-17
ES2298605T3 (es) 2008-05-16
FR2847272A1 (fr) 2004-05-21
PL202086B1 (pl) 2009-05-29
AU2003295014B2 (en) 2009-03-12
RU2326179C2 (ru) 2008-06-10
US20060162826A1 (en) 2006-07-27
ATE382716T1 (de) 2008-01-15
PE20040484A1 (es) 2004-08-18
AU2003295014A1 (en) 2004-06-18
KR101010571B1 (ko) 2011-01-25
PL375543A1 (en) 2005-11-28
CN1714159A (zh) 2005-12-28
WO2004048619A1 (fr) 2004-06-10
US7713362B2 (en) 2010-05-11
JP2006506527A (ja) 2006-02-23
FR2847272B1 (fr) 2004-12-24
DE60318478T2 (de) 2008-12-11
KR20050083903A (ko) 2005-08-26
CA2506349C (fr) 2012-04-24
CA2506349A1 (fr) 2004-06-10
UA78624C2 (en) 2007-04-10
ZA200504150B (en) 2006-09-27
BR0315693A (pt) 2005-09-20
CN100348738C (zh) 2007-11-14
JP4535876B2 (ja) 2010-09-01
WO2004048619A8 (fr) 2005-05-26
BR0315693B1 (pt) 2011-06-28
AR042073A1 (es) 2005-06-08

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