GB845167A - Improvements in magnetic material - Google Patents

Improvements in magnetic material

Info

Publication number
GB845167A
GB845167A GB27326/58A GB2732658A GB845167A GB 845167 A GB845167 A GB 845167A GB 27326/58 A GB27326/58 A GB 27326/58A GB 2732658 A GB2732658 A GB 2732658A GB 845167 A GB845167 A GB 845167A
Authority
GB
United Kingdom
Prior art keywords
sheet
cooling
dry hydrogen
annealed
furnace
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
GB27326/58A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB845167A publication Critical patent/GB845167A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B3/02—Rolling special iron alloys, e.g. stainless steel
    • 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
    • C21D8/1205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular fabrication or treatment of ingot or slab
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/14766—Fe-Si based alloys
    • H01F1/14775—Fe-Si based alloys in the form of sheets
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/84—Controlled slow cooling
    • 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
    • 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
    • C21D8/1222—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
    • 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

Landscapes

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

Abstract

Silicon-iron alloys have the following compositions:- .Si%.C%.Ti%.S% .3.25.0.035.0.03.0.026 .3.25.0.03.0.05.0.018 .3.25.0.013.0.05.0.017 .3.50.0.036.0.043.0.028 .3.10.0.033.0.047.0.030 .3.47.0.033.0.026.0.023 .3.10.0.029.0.038.0.040 the balance in each case being iron Slabs are cut from the above alloys, heated to 1000 DEG C in dry hydrogen and hot rolled to 80 mils. thick sheet. The hot rolled sheet is annealed at 900 DEG C for 1/2 hour in dry hydrogen or a vacuum and after cooling cold rolled to 25 mils. thickness. The cold rolled sheet is annealed in dry hydrogen or vacuum at 860 DEG C for one minute the sheet being in the heating zone for 3 1/2 minutes. After cooling, the annealed sheet is cold rolled to 12 mill. thickness and decarbonized by heating for 5 minutes at 800 DEG C in wet hydrogen-the decarbonized sheet is heated in a metal retort in a furnace with dry hydrogen (-90 DEG dewpoint) passing through the retort as the temperature is increased at 100 DEG C per hour to 1200 DEG C holding this temperature for 8 hours, cooling at 100 DEG C per hour to 600 DEG C, and furnace cooling to about 300 DEG C, at which point the retort is removed from the furnace.
GB27326/58A 1956-12-31 1958-08-26 Improvements in magnetic material Expired GB845167A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US832438XA 1956-12-31 1956-12-31
US845167XA 1957-10-29 1957-10-29
US840290A US3069299A (en) 1956-12-31 1959-09-16 Process for producing magnetic material

Publications (1)

Publication Number Publication Date
GB845167A true GB845167A (en) 1960-08-17

Family

ID=27374494

Family Applications (3)

Application Number Title Priority Date Filing Date
GB39883/57A Expired GB832438A (en) 1956-12-31 1957-12-23 Process for producing silicon-iron alloy sheets
GB27326/58A Expired GB845167A (en) 1956-12-31 1958-08-26 Improvements in magnetic material
GB27546/60A Expired GB919206A (en) 1956-12-31 1960-08-09 Improvements in process for producing magnetic material

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB39883/57A Expired GB832438A (en) 1956-12-31 1957-12-23 Process for producing silicon-iron alloy sheets

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB27546/60A Expired GB919206A (en) 1956-12-31 1960-08-09 Improvements in process for producing magnetic material

Country Status (5)

Country Link
US (1) US3069299A (en)
BE (2) BE563542A (en)
DE (3) DE1159978B (en)
FR (2) FR1197045A (en)
GB (3) GB832438A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438820A (en) * 1965-04-02 1969-04-15 Dominion Foundries & Steel Silicon steel process
US4092178A (en) * 1974-12-11 1978-05-30 Nippon Steel Corporation Process for producing a steel having excellent strength and toughness

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB933873A (en) * 1959-07-09 1963-08-14 United States Steel Corp Method of producing grain oriented electrical steel
US3147158A (en) * 1961-11-22 1964-09-01 Gen Electric Process for producing cube-on-edge oriented silicon iron
US3636579A (en) * 1968-04-24 1972-01-25 Nippon Steel Corp Process for heat-treating electromagnetic steel sheets having a high magnetic induction
US3632456A (en) * 1968-04-27 1972-01-04 Nippon Steel Corp Method for producing an electromagnetic steel sheet of a thin sheet thickness having a high-magnetic induction
JPS5018445B1 (en) * 1970-03-30 1975-06-28
JPS5032059B2 (en) * 1971-12-24 1975-10-17
JPS5339852B2 (en) * 1973-05-09 1978-10-24

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534141A (en) * 1948-01-14 1950-12-12 Gen Electric Heat-treatment of cold rolled silicon steel strip
US2618843A (en) * 1949-11-21 1952-11-25 United States Steel Corp Preventing cracking of silicon steel during hot rolling
BE563546A (en) * 1956-12-31

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438820A (en) * 1965-04-02 1969-04-15 Dominion Foundries & Steel Silicon steel process
US4092178A (en) * 1974-12-11 1978-05-30 Nippon Steel Corporation Process for producing a steel having excellent strength and toughness

Also Published As

Publication number Publication date
US3069299A (en) 1962-12-18
DE1176164B (en) 1964-08-20
GB919206A (en) 1963-02-20
GB832438A (en) 1960-04-13
BE571059A (en)
DE1159978B (en) 1963-12-27
FR1213741A (en) 1960-04-04
BE563542A (en)
FR1197045A (en) 1959-11-27
DE1181255B (en) 1964-11-12

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