EP1423219A1 - A method for manufacturing an ultra-high-tensile, expanded metal of steel - Google Patents

A method for manufacturing an ultra-high-tensile, expanded metal of steel

Info

Publication number
EP1423219A1
EP1423219A1 EP02765741A EP02765741A EP1423219A1 EP 1423219 A1 EP1423219 A1 EP 1423219A1 EP 02765741 A EP02765741 A EP 02765741A EP 02765741 A EP02765741 A EP 02765741A EP 1423219 A1 EP1423219 A1 EP 1423219A1
Authority
EP
European Patent Office
Prior art keywords
work piece
yield point
temperature
forming operation
manufacturing
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.)
Granted
Application number
EP02765741A
Other languages
German (de)
French (fr)
Other versions
EP1423219B1 (en
Inventor
Leif Carlsson
Hans Groth
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.)
Outokumpu Oyj
Original Assignee
AvestaPolarit AB
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 AvestaPolarit AB filed Critical AvestaPolarit AB
Publication of EP1423219A1 publication Critical patent/EP1423219A1/en
Application granted granted Critical
Publication of EP1423219B1 publication Critical patent/EP1423219B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/04—Hardening by cooling below 0 degrees Celsius

Definitions

  • the present invention relates to a method for manufacturing an ultra-high-tensile expanded metal of steel.
  • an expanded metal When manufacturing an expanded metal one usually starts from metallic work pieces, preferably of soft steel with good forming properties. During the forming operation one achieves a certain degree of deformation hardening, which however is insufficient for obtaining an ultra-high-tensile final product. In case one should start from a material that initially is ultra-high- tensile with a yield point preferably more than 700 MPa, this material would not have sufficient ductility to be formed to expanded metal. This is so because the material would break during the forming operation.
  • the object of the present invention is to provide a method for manufacturing an ultra-high-tensile expanded metal, which is constituted of iron that has been alloyed to give a strong deformation hardening when being subjected to plastic cold machining in combination with maintaining good ductility of the alloy at the same time as the final product achieves a yield point more than 700 MPa.
  • the expanded metal manufactured according to the invention is constituted of a work piece of iron, which has been alloyed with chromium, nickel and carbon in predetermined proportions.
  • the iron is alloyed with 17% Cr, 7% Ni and 0,1% C or alloys closely related to these and that the temperature of the work piece before and/or during the manufacturing operation has achieved or is kept at a controlled level, wherein a strong but controlled deformation hardening is achieved when plastic cold working the work piece in combination with maintaining a good ductility of the alloy.
  • the temperature of the finally formed expanded metal is controlled after the working operation.
  • the alloyed metal work piece that forms the initial work piece is formed in traditional machines for expanded metal fabrication to increase its yield point from an original, low yield point of about 300 MPa to a final product that completely or partially obtains a yield point of more than 700 MPa.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

The invention relates to a method for manufacturing an ultra-hig-tensile expanded metal of steel. The initial work piece used and constituted of a metal work piece of iron, which has been alloyed with chromium, nickel and carbon in predetermined proportions, is plastically cold worked in order to, during controlled temperature conditions with respect to the metal, that is to say the work piece and fina product, provide a strong deformation hardening at the same time as the alloy maintains a good ductility.

Description

A method for manufacturing an ultra-high-tensile, expanded metal of steel
The present invention relates to a method for manufacturing an ultra-high-tensile expanded metal of steel.
When manufacturing an expanded metal one usually starts from metallic work pieces, preferably of soft steel with good forming properties. During the forming operation one achieves a certain degree of deformation hardening, which however is insufficient for obtaining an ultra-high-tensile final product. In case one should start from a material that initially is ultra-high- tensile with a yield point preferably more than 700 MPa, this material would not have sufficient ductility to be formed to expanded metal. This is so because the material would break during the forming operation.
The object of the present invention is to provide a method for manufacturing an ultra-high-tensile expanded metal, which is constituted of iron that has been alloyed to give a strong deformation hardening when being subjected to plastic cold machining in combination with maintaining good ductility of the alloy at the same time as the final product achieves a yield point more than 700 MPa. The characterising features of the invention are stated in the subsequent claims .
Thanks to the invention one has now provided a method for manufacturing an ultra-high-tensile expanded metal of steel, which in an excellent manner fulfils its object at the same time as the manufacture can take place very rationally with already existing machines to low cost.
The invention is described in more detail with the aid of the embodiment below. In a preferred embodiment of the invention, the expanded metal manufactured according to the invention is constituted of a work piece of iron, which has been alloyed with chromium, nickel and carbon in predetermined proportions. In the example chosen the iron is alloyed with 17% Cr, 7% Ni and 0,1% C or alloys closely related to these and that the temperature of the work piece before and/or during the manufacturing operation has achieved or is kept at a controlled level, wherein a strong but controlled deformation hardening is achieved when plastic cold working the work piece in combination with maintaining a good ductility of the alloy. Furthermore, the temperature of the finally formed expanded metal is controlled after the working operation. The alloyed metal work piece that forms the initial work piece is formed in traditional machines for expanded metal fabrication to increase its yield point from an original, low yield point of about 300 MPa to a final product that completely or partially obtains a yield point of more than 700 MPa.

Claims

Claims
! . A method for manufacturing an ultra-high-tensile expanded metal of steel, characterized in that the initial work piece used and constituted of a metal work piece of iron alloyed with chromium, nickel and carbon in predetermined proportions, is plastically cold worked to provide a strong deformation hardening that gives the final product a strong, many times increased strength, that is to say a high yield point, as compared to the yield point of the initial work piece.
2. A method according to claim 1, characterized i 'that the work piece consisting of iron that is plastically worked is alloyed with 17% Cr, 7% Ni and 0,1% C or closely related alloys.
3. A method according to claim 1, characterized in that the alloyed work piece is formed in traditional machines for manufacturing expanded metals to increase its yield point from an original low yield point to a final product that completely or partially obtains a higher yield point.
4. A method according to claim 1, 2 or 3, characterized in that the original low yield point is about 300 MPa and the higher one is more than 700 MPa.
5. A method according to claim 1, 2 or 3, characterized in that the initial work piece is cooled to or is kept at a controlled temperature before and during the forming operation to obtain a controlled, maximal strength independently of the degree of deformation during the forming operation.
6. A method according to any one of the preceding claims 1, 2, 3 or 5, characterized in that the temperature to which the work piece has been cooled or the temperature that is maintained during the forming operation is about -196 < T < 70°C.
7. A method according to claim 1, 2, 3, 5 or 6, characterized in that the final product is cooled or is kept at a controlled temperature to obtain a controlled maximal strength independently of the degree of deformation during the forming operation.
8. A method according to claim 7, characterized in that the temperature to which the final product is cooled or the temperature that is maintained after the forming operation is about -196 < T < 70°C.
EP02765741A 2001-09-05 2002-09-04 A method for manufacturing an ultra-high-tensile, expanded metal of steel Expired - Lifetime EP1423219B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0102943A SE522746C2 (en) 2001-09-05 2001-09-05 Process for manufacturing an ultra-high tensile steel steel
SE0102943 2001-09-05
PCT/SE2002/001577 WO2003020456A1 (en) 2001-09-05 2002-09-04 A method for manufacturing an ultra-high-tensile, expanded metal of steel

Publications (2)

Publication Number Publication Date
EP1423219A1 true EP1423219A1 (en) 2004-06-02
EP1423219B1 EP1423219B1 (en) 2008-10-08

Family

ID=20285232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02765741A Expired - Lifetime EP1423219B1 (en) 2001-09-05 2002-09-04 A method for manufacturing an ultra-high-tensile, expanded metal of steel

Country Status (6)

Country Link
EP (1) EP1423219B1 (en)
AT (1) ATE410250T1 (en)
DE (1) DE60229272D1 (en)
ES (1) ES2314095T3 (en)
SE (1) SE522746C2 (en)
WO (1) WO2003020456A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2018085A (en) * 1934-05-29 1935-10-22 Allegheny Steel Co Method of making flat expanded grilles
US4649607A (en) * 1985-06-28 1987-03-17 Fmc Corporation Apparatus for making expanded metal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03020456A1 *

Also Published As

Publication number Publication date
SE0102943L (en) 2003-03-06
WO2003020456A1 (en) 2003-03-13
SE0102943D0 (en) 2001-09-05
DE60229272D1 (en) 2008-11-20
ES2314095T3 (en) 2009-03-16
EP1423219B1 (en) 2008-10-08
SE522746C2 (en) 2004-03-02
ATE410250T1 (en) 2008-10-15

Similar Documents

Publication Publication Date Title
JP5143531B2 (en) Cold mold steel and molds
JP6432070B2 (en) Hot die steel for long-life die casting excellent in high-temperature thermal conductivity and method for producing the same
JP5755153B2 (en) High corrosion resistance austenitic steel
JP5029942B2 (en) Hot work tool steel with excellent toughness
CN101087897A (en) Precipitation hardenable martensitic stainless steel
JP5437669B2 (en) Hot and hot forging die
US5172780A (en) Hard metal or hard material tipped drilling, chipping and cutting tools
JP2011001564A (en) Ferritic stainless steel sheet having excellent roughening resistance and method for producing the same
JP3357863B2 (en) Precipitation hardening stainless steel and method for producing the product
JPH028337A (en) Electrifying roll for electroplating and its manufacture
EP1423219B1 (en) A method for manufacturing an ultra-high-tensile, expanded metal of steel
CN102308014A (en) Steel alloy
JPS60141823A (en) Production of nonmagnetic steel working member
JPH0578786A (en) Austenitic high-temperature processed steel of precipitation hardenability and treatment thereof
JP4099742B2 (en) Tool steel with excellent weldability and machinability and mold using the same
JP2005152969A (en) Hot press molding method
US3123506A (en) Alloy steel and method
US20050211347A1 (en) Method for maunfacturing an ultra-high-tensile, stretch formed or stretch bent sheet metal product of steel
JP2001020041A (en) Tool steel excellent in weldability and machinability and tool and die
EP1483417A1 (en) A method for manufacturing an ultra-high-tensile pressure turned sheet metal product of steel
JP2004018988A (en) Method for warm-forging precipitation-hardening martensitic stainless steel, and forged parts manufactured by the method
JP2843375B2 (en) Free-cutting stainless steel for molds with excellent rust resistance
JP2000248332A (en) Mold having excellent heat resistance and method for producing the same
JPS63219527A (en) Manufacture of ferritic stainless steel excellent in cold workability
WO2004046407A1 (en) Special steel as hot-cool composite material and manufacturing process thereof

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040313

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17Q First examination report despatched

Effective date: 20061023

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: OUTOKUMPU OYJ

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60229272

Country of ref document: DE

Date of ref document: 20081120

Kind code of ref document: P

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: KATZAROV S.A.

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2314095

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081008

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081008

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081008

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081008

26N No opposition filed

Effective date: 20090709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081008

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090930

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090904

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090904

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081008

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081008

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: NEW ADDRESS: AVENUE DES MORGINES 12, 1213 PETIT-LANCY (CH)

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20180924

Year of fee payment: 17

Ref country code: IT

Payment date: 20180921

Year of fee payment: 17

Ref country code: DE

Payment date: 20180920

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20180919

Year of fee payment: 17

Ref country code: BE

Payment date: 20180919

Year of fee payment: 17

Ref country code: SE

Payment date: 20180919

Year of fee payment: 17

Ref country code: GB

Payment date: 20180919

Year of fee payment: 17

Ref country code: FI

Payment date: 20180920

Year of fee payment: 17

Ref country code: CH

Payment date: 20180919

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20181022

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60229272

Country of ref document: DE

REG Reference to a national code

Ref country code: FI

Ref legal event code: MAE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190904

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190905

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20191001

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200401

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191001

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20190930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190904

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190904

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190904

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20210127

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190905