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
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.
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) |
-
1975
- 1975-03-19 SE SE7503135A patent/SE7503135L/sv unknown
- 1975-03-20 DE DE19752512209 patent/DE2512209A1/en active Pending
- 1975-03-20 FR FR7508718A patent/FR2264890A1/en active Granted
- 1975-03-20 JP JP3306375A patent/JPS50131822A/ja active Pending
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 |