GB1413136A - Method of producing sheet steel or strip - Google Patents

Method of producing sheet steel or strip

Info

Publication number
GB1413136A
GB1413136A GB4866072A GB4866072A GB1413136A GB 1413136 A GB1413136 A GB 1413136A GB 4866072 A GB4866072 A GB 4866072A GB 4866072 A GB4866072 A GB 4866072A GB 1413136 A GB1413136 A GB 1413136A
Authority
GB
United Kingdom
Prior art keywords
steel
seconds
plate
cooled
strip
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
Application number
GB4866072A
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.)
Nippon Steel Corp
Original Assignee
Nippon 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
Priority claimed from JP46083736A external-priority patent/JPS5026495B2/ja
Priority claimed from JP46087396A external-priority patent/JPS512290B2/ja
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of GB1413136A publication Critical patent/GB1413136A/en
Expired 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
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
    • 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
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1261—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest following hot rolling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

1413136 Heat-treating silicon steel; nitriding NIPPON STEEL CORP 23 Oct 1972 [22 Oct 197 2 Nov 1971] 48660/72 Heading C7D [Also in Division B3] Steel containing (by wt.) not more than 4% Si, not more than 0.085% C, 0.01-0.065% acid-soluble Al, and N present up to 0.012%, together with optionally 0.013-0.027% S is formed into a slab, heated to above 1200‹C and cooled to a temperature in the range 1250- 1000‹C in less than 200 seconds after which it is hot-rolled to plate and cooled to 600‹C or below in less than 200 seconds. The plate is then cold rolled to sheet or strip in one or more stages, the one or final stage involving a reduction of 65- 95%, and the product finally annealed at more than 800‹C. There may be interposed between the hot and cold rolling operations a continous annealing process at 750-1200‹C, in the course of which the nitrogen content of the steel may be enriched by 0.0005-0.004%; after annealing the steel is rapidly cooled, particularly to 400‹C in 2 to 200 seconds to obtain 0.0005 to 0.0095% of precipitated AlN. Alternatively the plate may be nitrided for 30 seconds to 30 minutes at above 600‹C either in nitriding gas or after coating with manganese nitride, and then annealed. The final product is used particularly for transformer cores.
GB4866072A 1971-10-22 1972-10-23 Method of producing sheet steel or strip Expired GB1413136A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP46083736A JPS5026495B2 (en) 1971-10-22 1971-10-22
JP46087396A JPS512290B2 (en) 1971-11-02 1971-11-02

Publications (1)

Publication Number Publication Date
GB1413136A true GB1413136A (en) 1975-11-05

Family

ID=26424773

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4866072A Expired GB1413136A (en) 1971-10-22 1972-10-23 Method of producing sheet steel or strip

Country Status (6)

Country Link
BE (1) BE790427A (en)
CA (1) CA972663A (en)
FR (1) FR2169778B1 (en)
GB (1) GB1413136A (en)
IT (1) IT969733B (en)
SE (1) SE415889B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219611A1 (en) * 1985-08-15 1987-04-29 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet
EP0239688A1 (en) * 1986-04-03 1987-10-07 Nippon Steel Corporation Annealing separator used in the finishing annealing step for producing a grain-oriented electrical steel sheet
EP0326912A2 (en) * 1988-02-03 1989-08-09 Nippon Steel Corporation Process for production of grain oriented electrical steel sheet having high flux density

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010050A (en) * 1975-09-08 1977-03-01 Allegheny Ludlum Industries, Inc. Processing for aluminum nitride inhibited oriented silicon steel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0219611A1 (en) * 1985-08-15 1987-04-29 Nippon Steel Corporation Method for producing a grain-oriented electrical steel sheet
EP0239688A1 (en) * 1986-04-03 1987-10-07 Nippon Steel Corporation Annealing separator used in the finishing annealing step for producing a grain-oriented electrical steel sheet
EP0326912A2 (en) * 1988-02-03 1989-08-09 Nippon Steel Corporation Process for production of grain oriented electrical steel sheet having high flux density
EP0326912A3 (en) * 1988-02-03 1991-09-18 Nippon Steel Corporation Process for production of grain oriented electrical steel sheet having high flux density

Also Published As

Publication number Publication date
IT969733B (en) 1974-04-10
DE2251960B2 (en) 1975-11-13
BE790427A (en) 1973-02-15
FR2169778B1 (en) 1976-06-04
DE2251960A1 (en) 1973-06-20
FR2169778A1 (en) 1973-09-14
CA972663A (en) 1975-08-12
SE415889B (en) 1980-11-10

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years