ES2292762T5 - Steel and high-strength steel strip or sheet, cold malleable, process for manufacturing steel bands and uses of said steel - Google Patents

Steel and high-strength steel strip or sheet, cold malleable, process for manufacturing steel bands and uses of said steel Download PDF

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Publication number
ES2292762T5
ES2292762T5 ES02732754T ES02732754T ES2292762T5 ES 2292762 T5 ES2292762 T5 ES 2292762T5 ES 02732754 T ES02732754 T ES 02732754T ES 02732754 T ES02732754 T ES 02732754T ES 2292762 T5 ES2292762 T5 ES 2292762T5
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steel
strip
characterized
according
manufacture
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ES2292762T3 (en
Inventor
Bernhard Engl
Thomas Heller
Harald Hofmann
Manfred Menne
Werner Zimmermann
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ThyssenKrupp Steel Europe AG
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ThyssenKrupp Steel Europe AG
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Priority to DE2001128544 priority Critical patent/DE10128544C2/en
Priority to DE10128544 priority
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Priority to PCT/EP2002/006480 priority patent/WO2002101109A1/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • 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 BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/002Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/04Ferrous alloys, e.g. steel alloys containing 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 BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226Hot rolling
    • 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 BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236Cold rolling
    • 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 BY DECARBURISATION, TEMPERING OR OTHER TREATMENTS
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273Final recrystallisation annealing

Abstract

Light steel with good cold malleability and high strength with the following composition (in% by weight): C: = 1, 00% Mn: 7, 00 - 30, 00% Al: 1, 00 - 10, 00% If: > 2, 50 - 8, 00% Al + Si:> 3, 50 - 12, 00% B: 0, 002 - <0.01% as well as, optionally, Ni: <8, 00% Cu: <3, 00% N: <0.60% Nb: <0.30% Ti: <0.30% V: <0.30% P: <0.01% iron rest and inevitable impurities.

Description

Steel and high-strength steel strip or sheet, cold malleable, process for manufacturing steel bands and uses of said steel

The invention relates to a lightweight Fe – Mn – Al – Si carbon steel, as well as a steel strip or sheet5 with good cold malleability and high strength. Beyond this, the invention relates to a process for manufacturing bands of such a steel and particularly suitable uses of such a steel.

A lightweight steel used for the manufacture of bodywork components and application at low temperatures is known from DE 197 27 759 C2. It contains, in addition to Fe, 10% to 30% of Mn, 1% to 8% of Al and 1% to 6% of Si, not exceeding the sum of the contents of Al and Si 12%. In this known steel, carbon is contained in all cases in the range of impurities.

In the case of the lightweight construction steel known from DE 199 00 199 A1, carbon is provided, on the contrary, as an optional alloy element. Known lightweight steel has> 7% to 27% of Mn,> 1% to 10% of Al,> 0.7% to 4% of Si, <0.5% of C, <10% of Cr, <10 % of Ni and <0.3% of Cu. In addition, N, V, Nb, Ti, P may be contained in the steel, the sum of these elements not exceeding 2%.

15 An austenitic lightweight construction steel of comparable composition, high strength and very cold malleable is described in DE 197 27 759 A1. This steel contains (in% by weight) 9.5 - 12% of (AI + Si), 10

- 30% of Mn and, as the rest, essentially iron, including the usual residual elements of steel (C, P, S, O, N). According to a preferred conformation, the Si content of this steel is 0.5-6% and its Al content is 1-8% with an Mn content of 15-30%. Due to its particularly high tensile strength of up to 1100 MPa, this steel is particularly suitable for the manufacture of body plates and structural components for reinforcing car bodies.

Also known lightweight steel of EP 1 067 203 A1 contains carbon, to be precise from 0.001 to 1.6%. In addition, this steel has, in addition to Fe, 6 - 30% of Mn,: 6% of Al,: 2.5% of Si,: 10% of Cr,: 10% of Ni and: 5% of Cu. Additionally, V, Ti, Nb, B, Zr and rare earths may be contained in the steel, not

25 exceeding the sum of its contents by 3%. Also, the known steel may contain P, Sn, Sb and As, the sum of the contents of these elements not having to be greater than 0.2%.

It has been shown that steels with this composition can be hot and cold rolled only with certain difficulties, despite the presence of carbon. Thus, in the edges of the bands there are often instabilities or fissures that make it difficult in practice to manufacture large-scale bands or sheets from these steels. In addition, these steels have a strongly isotropic deformation behavior, which manifests itself in a high Mr value. Also as a consequence of the bad deformability, the subsequent elaboration of the steel sheets generated in accordance with the known procedure is complicated.

Steels of good malleability and high strength are also required for the manufacture of components provided with teeth or comparable molded elements. In the case of these components, it is typically treated

35 of gear parts provided with internal and external teeth. They can be manufactured economically and with great precision in pressure lamination measurements.

A process for manufacturing parts of gears by pressure lamination is known from DE 197 24661 C2. According to this known procedure, from a high-strength microalloyed construction steel, which has a lower stretch limit of at least 500 N / mm2, it is molded from a sheet of raw material. This blank is cold molded then by pressure rolling to form a gear. In the course of the molding of the teeth, the sheet material is deformed to the limit of its deformation capacity, then a surface of the part provided with a tooth without thermal deformation is hardened, essentially maintaining the temperature.

The object of the invention is to achieve, from the state of the art explained above, a steel

Lightweight or a steel strip or sheet produced from it with good malleability and good strength that can also be manufactured easily on a large scale. In addition, a manufacturing process for a steel strip or sheet should be indicated, as well as preferred uses for steel.

The object is solved, on the one hand, by means of a light steel that has the following composition (in% weight):

C: 0.1 - 1.00%

Mn: 7.00 - 30.00%

At: 1.00 - 10.00%

Yes:> 2.50 - 8.00%

At + Si:> 3.50 - 12.00%

B: 0.002 - <0.01%

as well as, optionally,

Ni: <8.00%

Cu: <3.00%

5 N: <0.60%

Nb: <0.30%

Ti: <0.30%

V: <0.30%

P: <0.01%

the rest iron and inevitable impurities. To the impurities were added in this case sulfur and oxygen.

Surprisingly, it was discovered that the selective addition of boron in the steels according to the invention leads to a considerable improvement in the properties and the possibility of manufacturing. In this way, the boron content in the steel according to the invention causes a reduction of the stretching limit, thereby improving the

15 malleability. The favorable influences of the alloy on the mechanical-technological properties of the steel according to the invention can be sustained by the fact that the carbon content is 0.10-1.00% by weight, when a minimum magnitude can also be detected 0.10% by weight of carbon in the steel according to the invention.

In this case, the presence of these elements results in a particularly good combination of mechanical and technological properties. Thus, the steel according to the invention or a strip and / or sheet of steel generated therefrom has a clearly lower Mr value compared to the sheets belonging to the species in question, known from the prior art.

In addition, the composite steel bands and sheets according to the invention are characterized by comparatively lower stretching limits, better stretching capacity on mold with greater solidification exponents

25 (n value), greater deep drawing capacity (r value) and lower planar anisotropy (Mr value), as well as a better product of stretching and elongation limit. Thus, the tensile strength of steel strips and sheets according to the invention is at least 680 MPa. The product of tensile strength and elongation is at least 41,000 MPa. The stretch limit of steel sheets and bands according to the invention does not exceed 520MPa. At the same time, the steels according to the invention or the plates and bands generated therefrom have an extraordinarily high uniform elongation of 20% to more than 45%. N values of up to 0.7 are achieved.

As a result, a particularly well cold malleable lightweight steel strip or sheet is thus obtained which, due to its comparatively high strength and low density, is especially suitable for the manufacture of automobile body components. Likewise, the excellent strength and weight ratio makes appropriate a steel plate obtained according to the invention for the manufacture of wheels for vehicles, especially vehicles

35 automotive, for the manufacture of deformable components by high internal pressure or high external pressure, for the manufacture of high-strength engine parts, such as camshafts or piston rods, for the manufacture of construction elements intended for load protection that impact in the form of impulses, such as bombing, as armored plates, as well as protective elements intended for the protection of people, especially against bombardment. In particular, in the case of the last mentioned application, the comparatively low weight of the steel sheet according to the invention and the high strength stand out as very positive.

The steel sheets according to the invention are suitable, in the case of a purely austenitic structure, particularly for the manufacture of non-magnetic building elements.

On the other hand, it was shown that the steel sheets according to the invention also retain their resistance at particularly low temperatures. As such they are especially suitable for the manufacture of elements of

45 construction used in cryotechnics, such as containers or tubes for the cold technique.

The positive effects of boron on the steel used according to the invention can be obtained with certainty, when the boron content is 0.003 to 0.008% by weight.

Even the C content in the range of 0.1% to 1.0% guarantees a better production capacity of steel sheets and bands according to the invention. In the case of steels according to the invention, the formation of intermetallic phases is restricted by the presence of carbon. The cracks and instabilities in the area of the edges of the bands, as they occur in the steel bands generated from the known steels, are thus considerably reduced, greatly reducing instabilities with a higher content of

C. Another improvement in the quality of the edges of the bands is achieved with the addition of boron. As a result, the instabilities of the edges of the bands can be almost completely avoided by the combined addition of C and B.

55 Boron replaces the Mn alloy element in its action on mechanical-technological properties. In this way, it was established that a steel with 20% of Mn and 0.003% of boron has a similar property profile, such as a steel that contains 25% of Mn, but not B. Therefore, lightweight construction steels according to the invention, they may have relatively low Mn contents with comparatively high resistances. This leads to reduced costs in alloy agents and facilitates the metallurgical manufacturing by fusion of a lightweight steel used according to the invention.

Additionally, the contents of C and B provided according to the invention open a wide spectrum of parameters for hot rolling. In this way, it was found that the characteristic values of the steels according to the invention obtained by choosing high hot rolling temperatures and winding temperatures are essentially the same as those obtained in case of lower final hot rolling temperatures and winding temperatures . Even this insensitivity in the manufacture of hot rolled bands favors the possibility of a simple manufacture of the steel sheets according to the invention.

By virtue of the Si content limited to contents greater than 2.50% by weight, preferably greater than 2.70% by weight, the steel strips and sheets according to the invention have a better cold rolling capacity with respect to those bands or light steel plates that have low Si contents. The addition of a great deal of Si is expressed in more uniform stretch limits and an isotropic conformation of mechanical properties. The upper limit of the sum formed by contents of Al and Si is 12%, since a sum that exceeds this limit of contents of Al and Si would entail the danger of fragility.

The steel strips and sheets according to the invention can preferably be manufactured by means of a process in which a starting material, such as flat roughing, thin roughing or strip, is melted from a composite steel according to the invention in the manner previously explained. , in which molten molten material is heated to 1100 ° C or applied directly at this temperature, in which the preheated starting material is hot rolled in a hot rolled strip at a final hot rolling temperature of at least 800 ° C and in which the finished hot-rolling strip is wound at a temperature of 450 ° C to 700 ° C.

By hot-rolling the web according to the invention at final hot-rolling temperatures of at least 800 ° C and winding it at lower temperatures, the above-mentioned positive effect of carbon and especially boron is fully utilized. In this way, boron and carbon cause higher tensile strength values and stretch limits with acceptable fracture elongation values in esterango, both before and after. With a higher final hot rolling temperature, tensile strength and stretch limit are reduced, while increasing elongation values. By varying the final rolling temperatures in the frame predetermined by the invention, the desired properties of the steel strip obtained can thus be achieved and influenced on them in a simple manner.

By limiting the winding temperature to maximum values of 700 ° C, the fragility of the material is safely avoided. It has been found that, at high winding temperatures, the formation of frailty phases occurs that can cause, for example, detachment of the material and as such hinder or even make further processing impossible.

The hot rolled strip generated according to the invention is characterized by good use properties. If thinner sheets or bands are to be generated, then the hot rolled strip can be cold rolled after winding to form a cold rolled strip, making the cold rolling advantageously with a cold rolling degree of 30% to 75%. Preferably, the cold rolled strip obtained is subjected to an annealing, the annealing temperatures between 600 ° C and 1100 ° C should be included. In this case, annealing can be carried out in the hood in the temperature range of 600 ° C to 750 ° C or in an annealing oven at temperatures of 750 ° C to 1100 ° C. Finally, with respect to cold malleability and surface shaping, it is advantageous to finish the cold rolled strip with lamination.

Another particularly advantageous use of a steel according to the invention or of steel strips and sheets manufactured therefrom is the manufacture of cold-deformed components by pressure rolling. To do this, raw parts are manufactured from steel that will then be finished molding by pressure lamination. Due to its special property profile, the steel according to the invention or the sheet metal blanks manufactured therewith is particularly suitable for this purpose.

Depending on the composition, a purely synthetic structure or composed of a mixture of ferrite and austenite with parts of martensite can be incorporated into the steel according to the invention. Therefore, steels according to the invention can be molded essentially better. In the course of cold malleability, they are clearly solidified better than high-strength microalloyed or multi-phase steels used in a known way for pressure rolling manufacturing. In this way, resistance of the components in the range of 1400 N / mm2 to 2200 N / mm2 can be obtained, depending on the cold malleability. Therefore, additional hardening of the components generated after cold malleability can be dispensed with. It is also favorable, especially in the manufacture of geared gear parts for the purpose of application, that the steels used according to the invention for their manufacture are reduced in density due to the high content of light elements such as Si, Al.

By using a steel with the composition and consistency according to the invention, a term treatment or hardening of the surface of the pressure laminated component can be dispensed with. The danger of stretching and oxidation caused by these additional treatment steps in the state of the art no longer occurs, for example, when using a steel according to the invention to manufacture jagged construction elements, subjected locally to use at high request. In this way, the steel according to the invention allows the economical manufacture of lightweight, high-demand and precise construction elements in cold deformation, especially pressure rolling.

In the following, the invention is explained in more detail by means of examples of embodiment and comparison.

Table 1 shows the compositions of five steels A, B, C, D, E, of which steels A and B correspond to the alloy provided according to the invention, while in the case of steels C, D and E is about comparative examples.

Table 1

Steel
C Mn To the Yes B Faith, impurities

TO
0.5 fifteen 3 3 0.003 rest

B
0.5 twenty 3 3 0.003 rest

C
-  twenty 3 3 0.003 rest

D
-  14 3 3 - rest

AND
-  19 3 3 - rest

Steels A to E of the compositions in question were melted and cast into flat slabs. Then the flat slabs were preheated to a temperature of 1150 ° C. Preheated flat slabs were then hot rolled and finally wound.

The corresponding final hot rolling temperatures ET and winding temperatures HT, as well

10 as the corresponding tensile strength properties Rm, stretch limit Re, elongation A50, uniform elongation Agl and value n of the hot rolled bands obtained are indicated in Table 2.

Table 2

Steel
ET [° C] HT [° C] Re [N / mm2] Rm [N / mm2] A50 [%] Agl [%] n

TO
960 500 486 792 42 38 0.31

B
930 500 509 825 46 42 0.32

C
920 500 496 818 31 27 -

D
820 500 610 920 26 - -

AND
840 500 430 700 30 - -

Until the strip made of D-steel not according to the invention, which could not be cold rolled, the hot rolled bands obtained were then cold rolled with a degree of deformation of approximately 65% and calcined at 950 ° C in the past. The mechanical properties of cold rolled steel sheets obtained in this manner were incorporated in Table 3.

20 Table 3 excellent cold malleability. In this case, they have a markedly isotropic deformation behavior (r ~ 1, Mr ~ 0), with good resistance and great elongation at length. Also the steel bands generated from the C steel according to the invention without carbon, but with boron content have low stretching limits, greater elongation of breakage and uniform elongations, as well as a behavior

Steel
Re [N / mm2] Rm [N / mm2] A50 [%] Agl [%] n r Mr

TO
408 775 64 64 0.33 1.02 –0.1

B
411 785 61.1 61.1 0.33 1.0 –0.06

C
284 714 58 56.8 0.39 1.05 –0.17

D
Non cold rolling

AND
382 744 52.5 50.3 0.32 0.82 –0.25

5 isotropic deformation.

In this way, all variants of steel sheets according to the invention are especially suitable for the manufacture of bodywork components, especially for the outer plates of a car body, of vehicle wheels, especially automotive vehicles, of elements of non-magnetic construction, of containers used in cryotechnics, of components deformed by high internal pressure or high10 external pressure, of tubes that are especially intended for the manufacture of highly resistant motor parts, such as camshafts or piston rods, of elements of construction destined to the protection against loads that impact in the form of impulses like bombardment, or elements of protection like covered sheets, or armor for the human or animal body. Likewise, high-demand gear components characterized by low weight and good quality can be manufactured from steel plates according to the invention.

15 characteristics of use, without requiring additional thermal treatment.

Claims (27)

  1.  CLAIMS
    1. Light steel with good cold malleability and high strength with the following composition (in% by weight):
    C: 0.1 - 1.00% Mn: 7.00 - 30.00% At: 1.00 - 10.00% Yes:> 2.50 - 8.00%
    At + Si:> 3.50 - 12.00%
    B: 0.002 - <0.01%
    5 as well as, optionally,
    Ni: <8.00%
    Cu: <3.00%
    N: <0.60%
    10 Nb: <0.30% Ti: <0.30%
    V: <0.30%
    P: <0.01% rest iron and inevitable impurities.
    2. Light steel according to one of the preceding claims, characterized in that the Si content is> 2.70% by weight.
  2. 3.
     Light steel according to one of the preceding claims, characterized in that the boron content is from 0.003 to 0.008% by weight.
  3. Four.
     Steel strip or sheet made of a composite steel according to one of claims 1 to 3.
    A steel strip or sheet according to claim 4, characterized in that its tensile strength is at least 680 MPa.
  4. 6. Steel strip or sheet according to claim 4 or 5, characterized in that the tensile strength and elongation product is at least 41,000 MPa.
  5. 7. Steel strip or sheet according to one of claims 4 to 6, characterized in that its stretch limit is up to 520 MPa.
  6. 8. Procedure for manufacturing a high-strength, cold-malleable steel strip or sheet,
    -
     in which a starting material such as flat roughing, thin roughing or strip is melted, from a composite steel according to one of claims 1 to 3,
    -
     in which the molten starting material is heated to 1100 ° C or used directly at that temperature,
    30 - in which the preheated starting material is hot rolled to form a hot rolled strip at a final hot rolled temperature of at least 800 ° C, and
    - in which the finished hot-rolling strip is wound at a winding temperature of 450 ° C to 700 ° C.
  7. 9. Method according to claim 8, characterized in that the hot rolled strip is cold rolled after winding to form a cold rolled strip.
  8. 10.
     Method according to claim 9, characterized in that the cold rolled strip is subjected to annealing at an annealing temperature of 600 ° C to 1100 ° C.
  9. eleven.
     Method according to claim 10, characterized in that the annealing is performed as annealing
    in a hood at an annealing temperature of 600 ° C to 750 ° C.
  10. 12.
     Method according to claim 10, characterized in that the annealing is performed as annealing in passing at an annealing temperature of 750 ° C to 1100 ° C.
  11. 13.
     Method according to one of claims 9 to 12, characterized in that the cold rolled strip is finished by lamination.
  12. 14.
     Method according to one of claims 8 to 13, characterized in that the cold rolling is carried out with a cold rolling degree of 30% to 75%.
  13. fifteen.
     Method according to one of claims 8 to 14, characterized in that from the hot or cold rolled strip obtained in each case, raw parts are generated which are then finished with cold malleane forming building elements.
  14. 16.
     Method according to claim 15, characterized in that the cold deformation is carried out as pressure lamination.
  15. 17.
     Use of a steel or a steel strip or sheet according to one of claims 1 to 7 to manufacture body bearing components.
  16. 18.
     Use of a steel or steel strip or sheet according to one of claims 1 to 7 to manufacture visible parts from outside vehicle bodies.
  17. 19.
     Use of a steel or steel strip or sheet according to one of claims 1 to 7 for manufacturing vehicle wheels, especially automotive vehicles.
  18. twenty.
     Use of a steel or steel strip or sheet according to one of claims 1 to 7 to manufacture non-magnetic building elements.
  19. twenty-one.
     Use of a steel or steel strip or sheet according to one of claims 1 to 7 to manufacture construction elements used in cryotechnics.
  20. 22
     Use of a steel or steel strip or sheet according to one of claims 1 to 7 to manufacture components deformed by high internal pressure or high external pressure.
  21. 2. 3.
     Use of a steel or steel strip or sheet according to one of claims 1 to 6 to manufacture pipes, which are especially intended for the manufacture of highly resistant motor parts, such as camshafts or piston rod cams.
  22. 24.
     Use of a steel or steel strip or sheet according to one of claims 1 to 7 to manufacture construction elements intended for protection against loads that impact in the form of impulses, such as bulging, such as armored plates.
  23. 25.
     Use of a steel or steel strip or sheet according to one of claims 1 to 7 to manufacture protective elements intended for the protection of persons against loads that impact in the form of impulses, such as bombardment, such as helmets and armor for the body.
  24. 26.
     Use of a steel or steel strip or sheet according to one of claims 1 to 7 to manufacture components by pressure lamination.
  25. 27.
     Use of a steel or steel strip or sheet according to one of claims 1 to 7 to manufacture gear parts.
  26. 28.
     Use according to claim 27, characterized in that the gear parts are provided with teeth.
  27. 29.
     Use according to claim 27 or 28, characterized in that the gear parts are manufactured by pressure lamination.
ES02732754T 2001-06-13 2002-06-13 Steel and high-strength steel strip or sheet, cold malleable, process for manufacturing steel bands and uses of said steel Active ES2292762T5 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE2001128544 DE10128544C2 (en) 2001-06-13 2001-06-13 High-strength, cold-workable sheet steel, process for its production and use of such a sheet
DE10128544 2001-06-13
PCT/EP2002/006480 WO2002101109A1 (en) 2001-06-13 2002-06-13 Highly stable, steel and steel strips or steel sheets cold-formed, method for the production of steel strips and uses of said steel

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ES2292762T3 ES2292762T3 (en) 2008-03-16
ES2292762T5 true ES2292762T5 (en) 2012-10-29

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US (1) US20030145911A1 (en)
EP (1) EP1309734B2 (en)
JP (1) JP4227010B2 (en)
KR (1) KR100536645B1 (en)
CN (1) CN1215188C (en)
AT (1) AT370258T (en)
CA (1) CA2414138C (en)
DE (2) DE10128544C2 (en)
DK (1) DK1309734T3 (en)
ES (1) ES2292762T5 (en)
PT (1) PT1309734E (en)
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US20030145911A1 (en) 2003-08-07
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