EP0510249A3 - Cold reduced non-aging deep drawing steel and method for producing - Google Patents

Cold reduced non-aging deep drawing steel and method for producing Download PDF

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Publication number
EP0510249A3
EP0510249A3 EP19910114828 EP91114828A EP0510249A3 EP 0510249 A3 EP0510249 A3 EP 0510249A3 EP 19910114828 EP19910114828 EP 19910114828 EP 91114828 A EP91114828 A EP 91114828A EP 0510249 A3 EP0510249 A3 EP 0510249A3
Authority
EP
European Patent Office
Prior art keywords
aluminum
cold reduced
sheet
slab
acid sol
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
EP19910114828
Other versions
EP0510249B1 (en
EP0510249A2 (en
Inventor
E. Hook Rollin
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.)
Cleveland Cliffs Steel Corp
Original Assignee
Armco Steel Co LP
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27104547&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0510249(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US07/690,142 external-priority patent/US5102472A/en
Priority claimed from US07/720,966 external-priority patent/US5123971A/en
Application filed by Armco Steel Co LP filed Critical Armco Steel Co LP
Publication of EP0510249A2 publication Critical patent/EP0510249A2/en
Publication of EP0510249A3 publication Critical patent/EP0510249A3/en
Application granted granted Critical
Publication of EP0510249B1 publication Critical patent/EP0510249B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—Hot rolling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

A cold reduced, non-aging, aluminum killed steel characterized by an elongated grain structure and having an rm value at least 1.8 produced from a slab having a reduced hot rolling temperature. A slab consisting essentially of </= 0.08% carbon, </= 0.1% acid sol. aluminum, </= 0.2% manganese, all percentages by weight, the balance iron and unavoidable impurities, is hot rolled to a sheet from a temperature less than 1260 DEG C. Preferably, the slab is continuously cast from a melt consisting essentially of 0.03-0.08% acid sol. aluminum, 0.003-0.007% total nitrogen, < 0.20% manganese, wherein % acid sol. aluminum x % total nitrogen is within the range of 1 x 10<-><4> to 5 x 10<-><4> and is hot rolled from a temperature of 1093-1175 DEG C. The hot rolled sheet is descaled, cold reduced, batch annealed and temper rolled. Preferably, the cold reduced sheet is annealed in the range of 538-649 DEG C and the temper rolled sheet has a tensile strength of 284.5-313.9 N/mm<2> (29-32 kg/mm<2>), a total elongation of at least 42% and an rm value of at least 2.0.
EP91114828A 1991-04-23 1991-09-03 Cold reduced non-aging deep drawing steel and method for producing Revoked EP0510249B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US07/690,142 US5102472A (en) 1989-10-02 1991-04-23 Cold reduced non-aging deep drawing steel and method for producing
US690142 1991-04-23
US07/720,966 US5123971A (en) 1989-10-02 1991-06-25 Cold reduced non-aging deep drawing steel and method for producing
US720966 1991-06-25

Publications (3)

Publication Number Publication Date
EP0510249A2 EP0510249A2 (en) 1992-10-28
EP0510249A3 true EP0510249A3 (en) 1993-09-08
EP0510249B1 EP0510249B1 (en) 2000-03-08

Family

ID=27104547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114828A Revoked EP0510249B1 (en) 1991-04-23 1991-09-03 Cold reduced non-aging deep drawing steel and method for producing

Country Status (4)

Country Link
EP (1) EP0510249B1 (en)
AT (1) ATE190359T1 (en)
DE (1) DE69132028T2 (en)
ES (1) ES2144396T3 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798076A (en) * 1971-04-27 1974-03-19 Nippon Steel Corp METHOD FOR PRODUCING Al-KILLED DEEP DRAWING COLD ROLLED STEEL PLATE BY CONTINUOUS ANNEALING
US3959029A (en) * 1970-11-21 1976-05-25 Nippon Kokan Kabushiki Kaisha Process of making cold reduced Al-stabilized steel having high drawability
US4116729A (en) * 1977-09-09 1978-09-26 Nippon Steel Corporation Method for treating continuously cast steel slabs
US4145235A (en) * 1972-12-28 1979-03-20 Nippon Steel Corporation Process for producing cold rolled steel sheet and strip having improved cold formabilities
US4473411A (en) * 1983-07-20 1984-09-25 Armco Inc. Process of making aluminum killed low manganese deep drawing steel
US4478649A (en) * 1982-02-09 1984-10-23 Nippon Steel Corporation Method for producing a cold-rolled steel sheet having excellent formability
US4627881A (en) * 1981-09-18 1986-12-09 Nippon Steel Corporation Cold rolled steel sheet having excellent press formability and method for producing the same
US4698102A (en) * 1984-07-09 1987-10-06 Nippon Steel Corporation Process for producing, by continuous annealing, soft blackplate for surface treatment

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959029A (en) * 1970-11-21 1976-05-25 Nippon Kokan Kabushiki Kaisha Process of making cold reduced Al-stabilized steel having high drawability
US3798076A (en) * 1971-04-27 1974-03-19 Nippon Steel Corp METHOD FOR PRODUCING Al-KILLED DEEP DRAWING COLD ROLLED STEEL PLATE BY CONTINUOUS ANNEALING
US4145235A (en) * 1972-12-28 1979-03-20 Nippon Steel Corporation Process for producing cold rolled steel sheet and strip having improved cold formabilities
US4116729A (en) * 1977-09-09 1978-09-26 Nippon Steel Corporation Method for treating continuously cast steel slabs
US4627881A (en) * 1981-09-18 1986-12-09 Nippon Steel Corporation Cold rolled steel sheet having excellent press formability and method for producing the same
US4478649A (en) * 1982-02-09 1984-10-23 Nippon Steel Corporation Method for producing a cold-rolled steel sheet having excellent formability
US4473411A (en) * 1983-07-20 1984-09-25 Armco Inc. Process of making aluminum killed low manganese deep drawing steel
US4698102A (en) * 1984-07-09 1987-10-06 Nippon Steel Corporation Process for producing, by continuous annealing, soft blackplate for surface treatment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ISIJ INTERNATIONAL, vol. 30, no. 9, 1990, TOKYO,JP pages 764 - 772 K.USHIODA ET AL. *

Also Published As

Publication number Publication date
DE69132028D1 (en) 2000-04-13
ATE190359T1 (en) 2000-03-15
ES2144396T3 (en) 2000-06-16
DE69132028T2 (en) 2000-09-28
EP0510249B1 (en) 2000-03-08
EP0510249A2 (en) 1992-10-28

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