GB647748A - Improvements in and relating to the hardening of the surface of metals or metal alloys - Google Patents

Improvements in and relating to the hardening of the surface of metals or metal alloys

Info

Publication number
GB647748A
GB647748A GB35032/47A GB3503247A GB647748A GB 647748 A GB647748 A GB 647748A GB 35032/47 A GB35032/47 A GB 35032/47A GB 3503247 A GB3503247 A GB 3503247A GB 647748 A GB647748 A GB 647748A
Authority
GB
United Kingdom
Prior art keywords
hardening
diffusion layer
per cent
metals
relating
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
GB35032/47A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB647748A publication Critical patent/GB647748A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • C23C10/34—Embedding in a powder mixture, i.e. pack cementation
    • C23C10/58—Embedding in a powder mixture, i.e. pack cementation more than one element being diffused in more than one step
    • 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
    • C23C12/00—Solid state diffusion of at least one non-metal element other than silicon and at least one metal element or silicon into metallic material surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Powder Metallurgy (AREA)

Abstract

In a process of hardening a surface diffusion layer formed on a parent metal according to Specification 635,595 a hardening element having a small atomic diameter is incorporated to form hard interstitial solutions within the surface diffusion layer. The parent metal may be iron or an iron alloy and the surface may have Ti, V, Nb, Ta, Cr, Mo, or W diffused into it. The hardening elements may be C, N, B or Si and carbon, for example, may be added to steel having a diffusion layer of tungsten by heating to p above the Ac3 point (908 DEG C) in an atmosphere of hydrogen containing 8 per cent by volume of a mixture of 80 per cent propane and 20 per cent butane for 4 to 8 hours. The Specification as open to inspection under Sect. 91 included also the use of titanium as a hardening element. This subject-matter does not appear in the Specification as accepted.
GB35032/47A 1947-03-20 1947-12-31 Improvements in and relating to the hardening of the surface of metals or metal alloys Expired GB647748A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT647748X 1947-03-20

Publications (1)

Publication Number Publication Date
GB647748A true GB647748A (en) 1950-12-20

Family

ID=3678130

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35032/47A Expired GB647748A (en) 1947-03-20 1947-12-31 Improvements in and relating to the hardening of the surface of metals or metal alloys

Country Status (1)

Country Link
GB (1) GB647748A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2205154A5 (en) * 1972-10-31 1974-05-24 Daido Kogyo Kk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2205154A5 (en) * 1972-10-31 1974-05-24 Daido Kogyo Kk

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