GB939221A - Improvements in or relating to metal articles having a hard skin or surface and method of producing same - Google Patents
Improvements in or relating to metal articles having a hard skin or surface and method of producing sameInfo
- Publication number
- GB939221A GB939221A GB298860A GB298860A GB939221A GB 939221 A GB939221 A GB 939221A GB 298860 A GB298860 A GB 298860A GB 298860 A GB298860 A GB 298860A GB 939221 A GB939221 A GB 939221A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- metal
- hard facing
- matrix
- binder
- 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
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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
In a process of hard facing metal articles the surface is coated with an organic binder and a powder mixture comprising a metallic matrix of Co and Cr and a refractory material such as diamond or at least one of the carbides, borides, nitrides and silicides of W, Mo, Cr, Ta, Nb, V, Ti, Hf, Zr, or the carbides, borides and nitrides of silicon or the carbide and nitride of boron, and the coated article is then heated to form a fused hand between the metal matrix and the metal article. The metal articles coated may be alloys of Fe, Cu, Ni, Co or Mo and the organic binder may be an alcoholic solution of shellac or solutions of natural or synthetic resins. A flux such as borax, boric acid, metal borates and halides of Na, K, Ca and Zn are incorporated in the powder mixture which should have a particle size range of minus 5 plus 325 mesh. The matrix alloy of the hard facing material is an alloy of Co-Cr-WC with Co forming the major proportion, "Stellite" (Registered Trade Mark) martensitic steel or nickel boride. The hard facing powder mixture is attached to the metal article by means of the organic adhesive binder and the mixture is then heated to fuse the matrix alloy either by an oxyacetylene welding track or an induction furnace in protective, reducing or carbonising atmosphere. The binder may be applied to the surface either as a mixture with the hard facing composition or as a separate layer to which the hard facing mixture is then applied. The flux may also be applied either with the mixture or as a separate layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB298860A GB939221A (en) | 1960-01-27 | 1960-01-27 | Improvements in or relating to metal articles having a hard skin or surface and method of producing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB298860A GB939221A (en) | 1960-01-27 | 1960-01-27 | Improvements in or relating to metal articles having a hard skin or surface and method of producing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB939221A true GB939221A (en) | 1963-10-09 |
Family
ID=9749798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB298860A Expired GB939221A (en) | 1960-01-27 | 1960-01-27 | Improvements in or relating to metal articles having a hard skin or surface and method of producing same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB939221A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3667099A (en) * | 1970-07-31 | 1972-06-06 | Du Pont | Method of securing dense, metal-bonded refractory nitride bodies to steel and product |
-
1960
- 1960-01-27 GB GB298860A patent/GB939221A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3667099A (en) * | 1970-07-31 | 1972-06-06 | Du Pont | Method of securing dense, metal-bonded refractory nitride bodies to steel and product |
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