DE69132028D1 - Cold-formed and non-aging deep-drawn sheet steel and manufacturing process - Google Patents

Cold-formed and non-aging deep-drawn sheet steel and manufacturing process

Info

Publication number
DE69132028D1
DE69132028D1 DE69132028T DE69132028T DE69132028D1 DE 69132028 D1 DE69132028 D1 DE 69132028D1 DE 69132028 T DE69132028 T DE 69132028T DE 69132028 T DE69132028 T DE 69132028T DE 69132028 D1 DE69132028 D1 DE 69132028D1
Authority
DE
Germany
Prior art keywords
aluminum
cold
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.)
Expired - Fee Related
Application number
DE69132028T
Other languages
German (de)
Other versions
DE69132028T2 (en
Inventor
E Hook Dayton 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
AK Steel Corp
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=DE69132028(D1) "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 AK Steel Corp filed Critical AK Steel Corp
Application granted granted Critical
Publication of DE69132028D1 publication Critical patent/DE69132028D1/en
Publication of DE69132028T2 publication Critical patent/DE69132028T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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

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.
DE69132028T 1991-04-23 1991-09-03 Cold-formed and non-aging deep-drawn sheet steel and manufacturing process Expired - Fee Related DE69132028T2 (en)

Applications Claiming Priority (2)

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
US07/720,966 US5123971A (en) 1989-10-02 1991-06-25 Cold reduced non-aging deep drawing steel and method for producing

Publications (2)

Publication Number Publication Date
DE69132028D1 true DE69132028D1 (en) 2000-04-13
DE69132028T2 DE69132028T2 (en) 2000-09-28

Family

ID=27104547

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69132028T Expired - Fee Related DE69132028T2 (en) 1991-04-23 1991-09-03 Cold-formed and non-aging deep-drawn sheet steel and manufacturing process

Country Status (4)

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

Family Cites Families (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
JPS516610B1 (en) * 1971-04-27 1976-03-01
US4145235A (en) * 1972-12-28 1979-03-20 Nippon Steel Corporation Process for producing cold rolled steel sheet and strip having improved cold formabilities
AU505774B2 (en) * 1977-09-09 1979-11-29 Nippon Steel Corporation A method for treating continuously cast steel slabs
EP0075292B2 (en) * 1981-09-18 1993-11-24 Nippon Steel Corporation Method for producing a cold rolled steel sheet
JPS58136721A (en) * 1982-02-09 1983-08-13 Nippon Steel Corp Production of cold rolled steel plate having excellent workability
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

Also Published As

Publication number Publication date
ES2144396T3 (en) 2000-06-16
DE69132028T2 (en) 2000-09-28
EP0510249A2 (en) 1992-10-28
EP0510249A3 (en) 1993-09-08
EP0510249B1 (en) 2000-03-08
ATE190359T1 (en) 2000-03-15

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee