GB644465A - Process of case-hardening metals and their alloys - Google Patents

Process of case-hardening metals and their alloys

Info

Publication number
GB644465A
GB644465A GB35036/47A GB3503647A GB644465A GB 644465 A GB644465 A GB 644465A GB 35036/47 A GB35036/47 A GB 35036/47A GB 3503647 A GB3503647 A GB 3503647A GB 644465 A GB644465 A GB 644465A
Authority
GB
United Kingdom
Prior art keywords
silicon
carbon
per cent
compounds
metal
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
GB35036/47A
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 GB644465A publication Critical patent/GB644465A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C12/00Solid state diffusion of at least one non-metal element other than silicon and at least one metal element or silicon into metallic material surfaces
    • C23C12/02Diffusion in one step

Landscapes

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

Abstract

A metal article, capable of cementation by carbon and silicon, is case-hardened by heating it in the presence of an organic silicon compond which contains at least one carbon atom of an organic radical united to silicon and which decomposes at the treatment temperature. The compounds used may be organo-silicon oxides, ethers and diethers, hydrides and chlorides, silicols or polymeric silicones and, by selection of the compounds the ratio of carbon to silicon may be varied. The compounds may be decomposed on contact with the metal or previously decomposed or used in conjunction with a reducing or inert gas, which latter may also be used to produce a pressure higher than atmospheric. The metal may be immediately quenched or cooled in air and reheated and quenched. The silicon content may be over 7 per cent but a silicon of over 1.5 per cent and a carbon of not above 2.2 per cent in the surface is preferred. If the silicon/carbon ratio is high free silicon may be deposited on the surface.
GB35036/47A 1944-02-04 1947-12-31 Process of case-hardening metals and their alloys Expired GB644465A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US644465XA 1944-02-04 1944-02-04

Publications (1)

Publication Number Publication Date
GB644465A true GB644465A (en) 1950-10-11

Family

ID=22056037

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35036/47A Expired GB644465A (en) 1944-02-04 1947-12-31 Process of case-hardening metals and their alloys

Country Status (1)

Country Link
GB (1) GB644465A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854446A (en) * 1952-10-29 1958-09-30 Rhodiaceta Process for the continuous production of cellulose esters

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854446A (en) * 1952-10-29 1958-09-30 Rhodiaceta Process for the continuous production of cellulose esters

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