GB893233A - Improvements relating to the surface heating of metals - Google Patents

Improvements relating to the surface heating of metals

Info

Publication number
GB893233A
GB893233A GB3417058A GB3417058A GB893233A GB 893233 A GB893233 A GB 893233A GB 3417058 A GB3417058 A GB 3417058A GB 3417058 A GB3417058 A GB 3417058A GB 893233 A GB893233 A GB 893233A
Authority
GB
United Kingdom
Prior art keywords
capacitor
envelope
article
electrolyte
oct
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
GB3417058A
Inventor
John Keith Lancaster
David Conrad Milner
Wallace Hirst
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB3417058A priority Critical patent/GB893233A/en
Publication of GB893233A publication Critical patent/GB893233A/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/38—Heating by cathodic discharges
    • 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
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • 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
    • C21D1/34—Methods of heating
    • C21D1/40—Direct resistance heating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F3/00—Changing the physical structure of non-ferrous metals or alloys by special physical methods, e.g. treatment with neutrons

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)

Abstract

893,233. Surface hardening. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Oct. 16, 1959 [Oct. 24, 1958], No. 34170/58. Class 72. A process for treating the surface of a metallic article comprises arranging the object as one of two electrodes in an electrolytic bath containing an aqueous solution of a salt as the electrolyte and discharging a capacitor with such polarity that the article is the cathode, the magnitude of the charge being such that an electric discharge occurs across a gas or vapour envelope on the surface. As shown, the article 3 may be immersed in a 10% solution of sodium carbonate in a vessel 1, which is also provided with an electrode 9, and be connected to one plate 5 of a variable capacitor 6, the other plate of the capacitor being connected through a switch 8 to the electrode 9. The capacitor may be charged from a direct current source and discharged through the electrolyte. A thin gas or vapour envelope 13 is formed on the surface of the article and a high current discharge is produced across the envelope. A continuous direct current may be applied across the electrodes to provide a continuous envelope or the electrolyte may be heated to a temperature below the boiling point. Specifications 893,231 and 893,232 are referred to.
GB3417058A 1958-10-24 1958-10-24 Improvements relating to the surface heating of metals Expired GB893233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3417058A GB893233A (en) 1958-10-24 1958-10-24 Improvements relating to the surface heating of metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3417058A GB893233A (en) 1958-10-24 1958-10-24 Improvements relating to the surface heating of metals

Publications (1)

Publication Number Publication Date
GB893233A true GB893233A (en) 1962-04-04

Family

ID=10362261

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3417058A Expired GB893233A (en) 1958-10-24 1958-10-24 Improvements relating to the surface heating of metals

Country Status (1)

Country Link
GB (1) GB893233A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0137747A2 (en) * 1983-09-14 1985-04-17 British Steel plc Improvements in or relating to the production of grain oriented steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0137747A2 (en) * 1983-09-14 1985-04-17 British Steel plc Improvements in or relating to the production of grain oriented steel
EP0137747A3 (en) * 1983-09-14 1985-09-25 British Steel Corporation Improvements in or relating to the production of grain oriented steel

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