GB640289A - Improved process for the cementation of steel - Google Patents

Improved process for the cementation of steel

Info

Publication number
GB640289A
GB640289A GB2686147A GB2686147A GB640289A GB 640289 A GB640289 A GB 640289A GB 2686147 A GB2686147 A GB 2686147A GB 2686147 A GB2686147 A GB 2686147A GB 640289 A GB640289 A GB 640289A
Authority
GB
United Kingdom
Prior art keywords
cementation
gas
town
furnace
dehydrated
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
GB2686147A
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.)
GAZ DE FRANCE EX SOC D ECLAIRA
Original Assignee
GAZ DE FRANCE EX SOC D ECLAIRA
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 GAZ DE FRANCE EX SOC D ECLAIRA filed Critical GAZ DE FRANCE EX SOC D ECLAIRA
Publication of GB640289A publication Critical patent/GB640289A/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
    • 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
    • C23C8/20—Carburising
    • C23C8/22—Carburising of ferrous surfaces

Abstract

640,289. Cementation. GAZ DE FRANCE EX-SOC. D'ECLAIRAGE CHAUFFAGE ET FORCE MOTRICE. Oct..6, 1947, No. 26861. Convention date, July 29. [Class 72] In the cementation of steel, town's gas without any addition is preliminarily heated to 900‹ to 1000‹C, dehydrated and then passed in to a cementation furnace at 900‹ to 1000‹C. As shown, town's gas is passed through a series of control valves 6. 7, and 8 into tubes 3, 4, and 5 in an electrically heated furnace, then into a dehydrating chamber 10, containing for example, silica gel, and finally to a cementation furnace 12. The tubes 3, 4, and 5 may be empty or contain wood charcoal or iron filings and the gas finally issuing from the dehydrating chamber is stated to be free from unsaturated hydrocarbons and sulphur, low in CO, and high in CH 4 and to be suitable for case hardening nickel steels. The Specification as open to inspection under Sect. 91 includes also the removal of CO 2 from town's gas before dehydrating and the use of dehydrated town's gas without preliminary heating. This subject-matter does not appear in the Specification as accepted.
GB2686147A 1947-07-29 1947-10-06 Improved process for the cementation of steel Expired GB640289A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1005495T 1947-07-29

Publications (1)

Publication Number Publication Date
GB640289A true GB640289A (en) 1950-07-19

Family

ID=9564838

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2686147A Expired GB640289A (en) 1947-07-29 1947-10-06 Improved process for the cementation of steel

Country Status (5)

Country Link
BE (1) BE476317A (en)
CH (1) CH274316A (en)
DE (1) DE849565C (en)
FR (1) FR1005495A (en)
GB (1) GB640289A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1020356B (en) * 1952-06-20 1957-12-05 Renault Process for the production of cementation gas

Also Published As

Publication number Publication date
FR1005495A (en) 1952-04-10
BE476317A (en) 1947-10-31
CH274316A (en) 1951-03-31
DE849565C (en) 1952-09-15

Similar Documents

Publication Publication Date Title
GB640289A (en) Improved process for the cementation of steel
GB946962A (en) Improvements in or relating to carbon black
GB960332A (en) Process for the preparation of oxidation products of propylene
GB889259A (en) Apparatus for cracking of hydrocarbons
GB371054A (en) Improvements in or relating to the heat treatment of steel
GB847848A (en) Treatment of ferrous material
GB847660A (en) Process and apparatus for the production of combustible gases
GB554080A (en) Improvements in the treatment of town's gas and the like
GB886216A (en) Improvements in the production of metal oxides, especially iron oxides, by combustion of the corresponding metal carbonyls
GB569035A (en) Improvements in the production of toluene from crude benzole
ES251260A1 (en) Procedure for the preparation of alumina (Machine-translation by Google Translate, not legally binding)
ES302274A1 (en) A procedure for the affinity of iron. (Machine-translation by Google Translate, not legally binding)
GB618048A (en) Improvements in or relating to the bright heat treatment of ferrous metals
GB443524A (en) Improvements in and relating to the process of case-hardening iron or steel or alloyed steel articles
GB898465A (en) Improvements in and relating to atmospheres for the heat treatment of metals
ES278283A1 (en) Procedure, with its producer installation, of cooking partially combustible products (Machine-translation by Google Translate, not legally binding)
GB948734A (en) Improvements in or relating to the manufacture of combustible gas
GB687725A (en) Improvements in and relating to the surface treatment of steels
ES230823A1 (en) A procedure and apparatus for treating minerals (Machine-translation by Google Translate, not legally binding)
GB1021476A (en) The production of pig iron
JPS5277810A (en) Process and apparatus for controlling combustion of gases
GB573925A (en) A process for the production of gas mixtures containing carbon monoxide and hydrogen
GB623211A (en) Improvements in methods of and means for testing furnace atmospheres
ES204141A3 (en) A procedure for the preliminary chemical treatment of catalysts containing iron, intended especially to the hydrogenation of carbon oxide (Machine-translation by Google Translate, not legally binding)
GB471506A (en) Improvements in and relating to methods of testing the insulation of powdered iron particles