GB893233A - Improvements relating to the surface heating of metals - Google Patents
Improvements relating to the surface heating of metalsInfo
- 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
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.
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)
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 |
-
1958
- 1958-10-24 GB GB3417058A patent/GB893233A/en not_active Expired
Cited By (2)
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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