FR2264890A1 - Alloy carbides prepd. by heating low carbon alloy - in ferritic or austenitic condition and subjecting to carbon contg. atmos. - Google Patents

Alloy carbides prepd. by heating low carbon alloy - in ferritic or austenitic condition and subjecting to carbon contg. atmos.

Info

Publication number
FR2264890A1
FR2264890A1 FR7508718A FR7508718A FR2264890A1 FR 2264890 A1 FR2264890 A1 FR 2264890A1 FR 7508718 A FR7508718 A FR 7508718A FR 7508718 A FR7508718 A FR 7508718A FR 2264890 A1 FR2264890 A1 FR 2264890A1
Authority
FR
France
Prior art keywords
carbides
contg
carbon
alloy
atmos
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.)
Granted
Application number
FR7508718A
Other languages
French (fr)
Other versions
FR2264890B3 (en
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.)
METSURF Ltd
Original Assignee
METSURF Ltd
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 METSURF Ltd filed Critical METSURF Ltd
Publication of FR2264890A1 publication Critical patent/FR2264890A1/en
Application granted granted Critical
Publication of FR2264890B3 publication Critical patent/FR2264890B3/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

Alloy carbides are formed in iron contg. material by heating the material so that it is in either a ferritic or austenitic phase and subjecting the material to a carbon contg. atmos. for even formation of the carbides. The atmos. may be obtd. in a furnace or from a fluidized bed for carbon contg. particles or a molten salt bath contg. carbonaceous materials. The heat treatment may be part of the final hardening and tempering of the material and may be controlled to form carbides throughout the material or upon its surfaces. Used for forming carbides in steels contg. Cr, Mo, W or V. This use is claimed and the carbides are pref. finely dispersed and of sec. nature. The formed objects may be saws or razor baldes. Easier working of a base material, low in carbon, is obtd. into which carbon may later be introduced in to form finely divided carbides as the solubility of C in ferrite and austenite is very low.
FR7508718A 1974-03-20 1975-03-20 Alloy carbides prepd. by heating low carbon alloy - in ferritic or austenitic condition and subjecting to carbon contg. atmos. Granted FR2264890A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1225574 1974-03-20

Publications (2)

Publication Number Publication Date
FR2264890A1 true FR2264890A1 (en) 1975-10-17
FR2264890B3 FR2264890B3 (en) 1977-11-25

Family

ID=10001212

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7508718A Granted FR2264890A1 (en) 1974-03-20 1975-03-20 Alloy carbides prepd. by heating low carbon alloy - in ferritic or austenitic condition and subjecting to carbon contg. atmos.

Country Status (4)

Country Link
JP (1) JPS50131822A (en)
DE (1) DE2512209A1 (en)
FR (1) FR2264890A1 (en)
SE (1) SE7503135L (en)

Also Published As

Publication number Publication date
JPS50131822A (en) 1975-10-18
DE2512209A1 (en) 1975-09-25
SE7503135L (en) 1975-09-22
FR2264890B3 (en) 1977-11-25

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Legal Events

Date Code Title Description
ST Notification of lapse