BE817962A - Grain oriented magnetic steel sheets - aluminium added to silicon steel forms hard phase and gives high induction - Google Patents

Grain oriented magnetic steel sheets - aluminium added to silicon steel forms hard phase and gives high induction

Info

Publication number
BE817962A
BE817962A BE6044699A BE6044699A BE817962A BE 817962 A BE817962 A BE 817962A BE 6044699 A BE6044699 A BE 6044699A BE 6044699 A BE6044699 A BE 6044699A BE 817962 A BE817962 A BE 817962A
Authority
BE
Belgium
Prior art keywords
degrees
hard phase
gives high
grain oriented
oriented magnetic
Prior art date
Application number
BE6044699A
Other languages
French (fr)
Inventor
M Barisoni
M Barteri
P Brozzo
E Marianeschi
R R Bitti
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 filed Critical
Publication of BE817962A publication Critical patent/BE817962A/en

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
    • C21D8/1261—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
    • 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
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233—Cold rolling
    • 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
    • C21D8/1266—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 between cold rolling steps
    • 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
    • C21D8/1272—Final recrystallisation annealing

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

The steel contains in %: 2.5-3.5 Si, 0.01-0.05 Al, 0.06 max. C, and is treated to form a phase with high hardness amounting to 5-30 vol. %, the cycle being (a) hot-rolled at 1370-1430 degrees C.; (b) anneal, 10-60 secs. at 1050-1170, pref. 1120-1170 degrees C.; (c) cool slowly to 700-900, pref. 750-850 degrees C.; (d) quench rapidly in water; (e) cold-roll with redn. ratio 80-90%; (f) anneal for recrystallisation and decaburisation in damp H2 for 2 mins. at 780-870 degrees C.; (g) final anneal in N2+H2 at 1200 degrees C. Stage (d) gives high values of magnetic induction; this is not solely due to AlN but is due to the dispersion of a hard phase, formed on quenching, in the ferritic matrix.
BE6044699A 1973-07-23 1974-07-22 Grain oriented magnetic steel sheets - aluminium added to silicon steel forms hard phase and gives high induction BE817962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5158773A IT989962B (en) 1973-07-23 1973-07-23 PROCEDURE FOR THE PRODUCTION OF ORIENTED GRAIN MAGNETIC SHEET AND PRODUCT SO OBTAINED

Publications (1)

Publication Number Publication Date
BE817962A true BE817962A (en) 1974-11-18

Family

ID=11275373

Family Applications (1)

Application Number Title Priority Date Filing Date
BE6044699A BE817962A (en) 1973-07-23 1974-07-22 Grain oriented magnetic steel sheets - aluminium added to silicon steel forms hard phase and gives high induction

Country Status (2)

Country Link
BE (1) BE817962A (en)
IT (1) IT989962B (en)

Also Published As

Publication number Publication date
IT989962B (en) 1975-06-10

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: CENTRO SVILUPPO MATERIALI S.P.A.

Effective date: 19910731