EP1085103A2 - Warmgewalztes Stahlbech zur Emallierung auf einen oder beiden Oberflächen - Google Patents

Warmgewalztes Stahlbech zur Emallierung auf einen oder beiden Oberflächen Download PDF

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Publication number
EP1085103A2
EP1085103A2 EP00402600A EP00402600A EP1085103A2 EP 1085103 A2 EP1085103 A2 EP 1085103A2 EP 00402600 A EP00402600 A EP 00402600A EP 00402600 A EP00402600 A EP 00402600A EP 1085103 A2 EP1085103 A2 EP 1085103A2
Authority
EP
European Patent Office
Prior art keywords
steel
titanium
tic
nickel
sheet
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.)
Withdrawn
Application number
EP00402600A
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English (en)
French (fr)
Other versions
EP1085103A3 (de
Inventor
Christian Delmotte
Claude Morand
Laurent Vergin
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.)
USINOR SA
Original Assignee
USINOR 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 USINOR SA filed Critical USINOR SA
Publication of EP1085103A2 publication Critical patent/EP1085103A2/de
Publication of EP1085103A3 publication Critical patent/EP1085103A3/de
Withdrawn legal-status Critical Current

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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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0278—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment 

Definitions

  • Hot rolled sheet must also generate as little carbon as possible especially on the non coated and the scale on the surface of said sheet must be as adherent as possible.
  • Calamine formation contributes also a reduction in the thickness of the sheet and can be considered as a weight of lost metal which can be estimated at approximately 57% of the weight of said calamine formed.
  • the object of the invention is to propose a hot-rolled steel sheet which can have a relatively small thickness, and have very good characteristics for enameling.
  • Figure 1 shows the evolution of the mechanical characteristics Re and Rm in Mpa, as a function of the content of precipitated titanium in the form of TiC and Ti 4 C 2 S 2 in thousandths of a percent.
  • the hot-rolled steel sheet according to the invention is obtained from an easily stampable, therefore mild steel, adapting it to to make it glazable and to make it insensitive to variations in characteristics mechanical after firing the enamel.
  • composition of the steel contains titanium which upon cooling generates successively TiN, Ti 4 C 2 S 2 and TiC.
  • the effective Ti relationship total Ti - 3.42 N has been determined, which determines the actual amount of titanium precipitated in the form of TiC and Ti 4 C 2 S 2 which allows hydrogen to be trapped. Under these conditions, all the oxygen is trapped during the calming of the steel and all the nitrogen is precipitated in the form of TiN.
  • Hydrogen trapping prevents the appearance of type defects nail strokes.
  • Titanium also helps maintain mechanical characteristics after deformation and cooking due to the refinement caused by the grains.
  • Carbon is reduced at the content range of 0.04% to 0.08% to partially compensate for the increase in mechanical characteristics due increasing the titanium content.
  • Carbon limitation slightly reduces mechanical characteristics reduction in sheet metal offset by the addition of titanium.
  • Figure 1 shows the evolution of the mechanical characteristics Re and Rm in depending on the content of titanium precipitated or still not fixed by nitrogen.
  • Table 1 below presents, in relation to the single figure, for different steels, the total titanium content and the precipitate content.
  • Steel VS Mn Al Ti NOT S TiC + Ti 4 C 2 S 2 AT 63 333 41 23 4.8 ⁇ 1 6 B 63 334 42 43 5 ⁇ 1 26 VS 62 334 42 60 4.9 ⁇ 1 43 D1 64 306 38 37 2.9 ⁇ 1 27 D2 62 304 43 38 2.3 7 31 E 41 301 31 25 5.6 4.6 6 F 42 302 27 33 5.8 4.8 13 G 43 302 23 42 5.9 4.7 22
  • the effective Ti rate is equal to the sum of the TiC and Ti 4 C 2 S 2 contents, and the effective Ti is given by the total Ti relationship - 3.42 N.
  • the nitrogen content is therefore of great importance.
  • the proportion between the rate of TiC and Ti 4 C 2 S 2 is a function of the sulfur content.
  • a sheet is considered to be suitable for being glazed when it satisfies various tests of the adhesion test type materialized by a rating of a standardized impact on the enamelled sheet and of the type nail strokes materialized by the artificial aging of the enamelled sheet introduced in an oven to check for the appearance of nail strokes.
  • the composition of the steel contains the copper and nickel pair respectively in contents which make it possible to decrease the temperature AR3 and therefore, when hot rolling the sheet, reduce the rolling thickness of the sheet to a thickness of about 1.5 mm at the band train.
  • nickel as such, allows, in the concentration range given, to avoid the Paillette defect, corresponding to the formation of a eutectic at 1050 ° C which is created in the case of a steel containing copper and not containing of nickel.
  • the effect of nickel and copper is materialized in an oxidation test in which of the samples placed in an oven box at the enameling temperature of 850 ° C for variable times, present after oxidation and removal of the scale by pickling, different weight losses, the weight losses defining the degree of oxidation of the steels sampled.
  • Table 2 below presents the weight losses for a steel according to the invention containing in its composition the copper plus nickel couple compared to a reference steel not containing these two elements.
  • Oxidation oven box Reference steel Without Cu, without Ni Steel according to the invention 5 min of oxidation Scale weight g / m2 269 76 Thickness in microns 48 14 10 min of oxidation Scale weight g / m2 395 181 Thickness in microns 70 32 12 min of oxidation Scale weight g / m2 456 189 Thickness in microns 76 34
  • Table 3 presents the composition of a steel according to the invention containing in its composition the copper plus nickel couple and of a reference steel not containing these two elements. Element contents are expressed in thousandths of a percent.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
EP00402600A 1999-09-20 2000-09-20 Warmgewalztes Stahlbech zur Emallierung auf einen oder beiden Oberflächen Withdrawn EP1085103A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9911815 1999-09-20
FR9911815A FR2798676B1 (fr) 1999-09-20 1999-09-20 Tole d'acier lamine a chaud pour emaillage une ou deux faces

Publications (2)

Publication Number Publication Date
EP1085103A2 true EP1085103A2 (de) 2001-03-21
EP1085103A3 EP1085103A3 (de) 2001-05-09

Family

ID=9550102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00402600A Withdrawn EP1085103A3 (de) 1999-09-20 2000-09-20 Warmgewalztes Stahlbech zur Emallierung auf einen oder beiden Oberflächen

Country Status (2)

Country Link
EP (1) EP1085103A3 (de)
FR (1) FR2798676B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005040442A1 (de) * 2003-10-16 2005-05-06 Salzgitter Flachstahl Gmbh Beidseitig emaillierbares warmgewalztes band oder blech aus stahl, insbesondere if-stahl
WO2010130738A1 (en) * 2009-05-12 2010-11-18 Metagra Bergara, S.A. Method for manufacturing fixing members adapted for railway sleepers by cold forming
CN103540845A (zh) * 2013-11-07 2014-01-29 武汉钢铁(集团)公司 屈服强度为330MPa级的热轧薄板搪瓷钢及制造方法
CN108950423A (zh) * 2017-05-27 2018-12-07 宝山钢铁股份有限公司 一种热轧双面搪瓷用高强钢、双面搪瓷钢及其制造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2212469C1 (ru) * 2002-02-01 2003-09-20 Акционерное общество закрытого типа "Радонеж" Низколегированная сталь и изделие, выполненное из нее

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5651553A (en) * 1979-10-01 1981-05-09 Nippon Steel Corp High strength hot rolled steel sheet for both-side enameling
JPS56169727A (en) * 1980-05-29 1981-12-26 Nippon Kokan Kk <Nkk> Manufacture of hot-rolled steel plate for enameled product having excellent antifishscale property
JPH02305926A (ja) * 1989-05-17 1990-12-19 Nippon Steel Corp ホーロー用熱延鋼板の製造方法
JPH07138637A (ja) * 1993-11-16 1995-05-30 Nippon Steel Corp 微細な亜粒界を有する鋳片および微細な金属組織を有する厚鋼板の製造法
FR2753399B1 (fr) * 1996-09-19 1998-10-16 Lorraine Laminage Tole d'acier lamine a chaud pour emboutissage profond

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005040442A1 (de) * 2003-10-16 2005-05-06 Salzgitter Flachstahl Gmbh Beidseitig emaillierbares warmgewalztes band oder blech aus stahl, insbesondere if-stahl
WO2010130738A1 (en) * 2009-05-12 2010-11-18 Metagra Bergara, S.A. Method for manufacturing fixing members adapted for railway sleepers by cold forming
ES2394400A1 (es) * 2009-05-12 2013-01-31 Metagra Bergara, S.A. Metodo de fabricacion por conformacion en frio de elementos de fijacion adaptados para traviesas de ferrocarril
CN103540845A (zh) * 2013-11-07 2014-01-29 武汉钢铁(集团)公司 屈服强度为330MPa级的热轧薄板搪瓷钢及制造方法
CN108950423A (zh) * 2017-05-27 2018-12-07 宝山钢铁股份有限公司 一种热轧双面搪瓷用高强钢、双面搪瓷钢及其制造方法
CN108950423B (zh) * 2017-05-27 2020-06-23 宝山钢铁股份有限公司 一种热轧双面搪瓷用高强钢、双面搪瓷钢及其制造方法

Also Published As

Publication number Publication date
EP1085103A3 (de) 2001-05-09
FR2798676B1 (fr) 2001-10-26
FR2798676A1 (fr) 2001-03-23

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