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GB654962A - Improvements in or relating to methods of hardening alloys - Google Patents

Improvements in or relating to methods of hardening alloys

Info

Publication number
GB654962A
GB654962A GB31918/46A GB3191846A GB654962A GB 654962 A GB654962 A GB 654962A GB 31918/46 A GB31918/46 A GB 31918/46A GB 3191846 A GB3191846 A GB 3191846A GB 654962 A GB654962 A GB 654962A
Authority
GB
United Kingdom
Prior art keywords
oxygen
constituent
alloy
oxide
heated
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
GB31918/46A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB654962A publication Critical patent/GB654962A/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
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

Alloys comprising silver, copper and/or nickel as the main constituent and comprising an oxide-forming constituent are heated in an oxygen-containing atmosphere to harden them. The oxide-forming constituent is one the heat of formation of whose oxide exceeds that of the main constituent by more than 45 kilogram calories per gram atom of oxygen and preferably by more than 85 kilogram calories per gram atom of oxygen, the quantity of this constituent being low enough to permit diffusion of oxygen in the alloy. The alloy is so heated as to produce absorption of oxygen and to give an increase in hardness of more than 30 per cent. The oxideforming constituent may be one or more of the elements aluminium, beryllium, magnesium, manganese and titanium. The treatment may be such as to produce on the alloy a layer of oxide of the main constituent, the alloy being then heated in a non-oxidizing or slightly oxidizing atmosphere to cause diffusion of the surface oxygen.
GB31918/46A 1943-02-27 1946-10-28 Improvements in or relating to methods of hardening alloys Expired GB654962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL654962X 1943-02-27

Publications (1)

Publication Number Publication Date
GB654962A true GB654962A (en) 1951-07-04

Family

ID=19795198

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31918/46A Expired GB654962A (en) 1943-02-27 1946-10-28 Improvements in or relating to methods of hardening alloys

Country Status (1)

Country Link
GB (1) GB654962A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173764B (en) * 1957-05-23 1964-07-09 Siemens Ag Process for the production of abrasion-resistant surface layers of great hardness and conductivity, in particular for electrical sliding and friction contacts
US3184835A (en) * 1961-10-02 1965-05-25 Handy & Harman Process for internally oxidationhardening alloys, and alloys and structures made therefrom
US3216870A (en) * 1961-03-10 1965-11-09 Ilikon Corp Stabilized precipitation hardening alloys and method of making
US3352667A (en) * 1964-09-29 1967-11-14 Raytheon Co Prevention of hydrogen-embrittlement in oxygen-bearing copper
US3399086A (en) * 1967-02-13 1968-08-27 Raytheon Co Dispersion hardening of metal
US4478787A (en) * 1982-06-18 1984-10-23 Scm Corporation Method of making dispersion strengthened metal bodies and product

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173764B (en) * 1957-05-23 1964-07-09 Siemens Ag Process for the production of abrasion-resistant surface layers of great hardness and conductivity, in particular for electrical sliding and friction contacts
US3216870A (en) * 1961-03-10 1965-11-09 Ilikon Corp Stabilized precipitation hardening alloys and method of making
US3184835A (en) * 1961-10-02 1965-05-25 Handy & Harman Process for internally oxidationhardening alloys, and alloys and structures made therefrom
US3352667A (en) * 1964-09-29 1967-11-14 Raytheon Co Prevention of hydrogen-embrittlement in oxygen-bearing copper
US3399086A (en) * 1967-02-13 1968-08-27 Raytheon Co Dispersion hardening of metal
US4478787A (en) * 1982-06-18 1984-10-23 Scm Corporation Method of making dispersion strengthened metal bodies and product

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