GB959533A - Process of boronizing metal or alloy surfaces - Google Patents
Process of boronizing metal or alloy surfacesInfo
- Publication number
- GB959533A GB959533A GB4043862A GB4043862A GB959533A GB 959533 A GB959533 A GB 959533A GB 4043862 A GB4043862 A GB 4043862A GB 4043862 A GB4043862 A GB 4043862A GB 959533 A GB959533 A GB 959533A
- Authority
- GB
- United Kingdom
- Prior art keywords
- boronizing
- base alloy
- max
- balance
- alloy
- 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
- 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
- C23C8/40—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 liquids, e.g. salt baths, liquid suspensions
- C23C8/42—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 liquids, e.g. salt baths, liquid suspensions only one element being applied
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
A metal or alloy surface, e.g. of Fe, Ni, Co, Mo, W, or Ta base alloy, is boronized by immersing it in a fused salt bath containing boron carbide within a silicon carbide lined vessel. Suitable solvents for the B4C in the bath may be molten NaOH or KOH, boric acid, or one or more alkali or alakline earth metal meta-, penta- and/or fluoro-borates. Preferably the bath is of fused sodium tetraborate at 1500-2150 DEG F. containing 5-20% by weight of dissociated B4C. A small amount of carburizing may take place. After boronizing, the surface may be heat-treated to diffuse boron further into the surface, e.g. at 1900 DEG F. for 1 hour, followed by water quenching for a Ni base alloy. Prior to boronizing, the surface may be cleaned and/or heated. A resist of electro-deposited copper may be applied to the surface for boronizing selected parts only. The following alloys are specified:-(a) low alloy steel: .38-.43% Cu, .5-.7% Mn, .2-.4% Si, .04% max. P, .04% max. S, 1.4-1.8% Cr, .3-.4% Mo, .95-1.3% Al, balance Fe; (b) nickel base alloy: .08% max. C, 1% Mn, 9% Fe, .55% Si, .2% Cu, 14-16% Cr, 2.2-2.7% Ti, .4-1% Al, .7-1.2% Nb, balance Ni; (c) cobalt base alloy: .3-.45% C, 18-22% Ni, 18-22% Cr, 3.5-5% Mo, 3.5-8% W, 2.5-4% Nb, 4% Fe, balance Co at least 38%.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14790161A | 1961-10-26 | 1961-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB959533A true GB959533A (en) | 1964-06-03 |
Family
ID=22523388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4043862A Expired GB959533A (en) | 1961-10-26 | 1962-10-25 | Process of boronizing metal or alloy surfaces |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB959533A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2128779A1 (en) * | 1971-03-09 | 1972-10-20 | Toyoda Chuo Kenkyusho Kk | |
| US4019926A (en) * | 1974-07-01 | 1977-04-26 | The Secretary Of State For Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Prevention of corrosion of metals |
| US4536224A (en) * | 1983-07-26 | 1985-08-20 | Degussa Aktiengesellschaft | Salt bath for the currentless production of wear resistant boride layers |
| CN104630860A (en) * | 2015-02-02 | 2015-05-20 | 西安建筑科技大学 | Rare-earth-catalyzed titanizing melting salt pulse electrolysis boronizing method near phase transition temperature |
-
1962
- 1962-10-25 GB GB4043862A patent/GB959533A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2128779A1 (en) * | 1971-03-09 | 1972-10-20 | Toyoda Chuo Kenkyusho Kk | |
| US4019926A (en) * | 1974-07-01 | 1977-04-26 | The Secretary Of State For Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Prevention of corrosion of metals |
| US4536224A (en) * | 1983-07-26 | 1985-08-20 | Degussa Aktiengesellschaft | Salt bath for the currentless production of wear resistant boride layers |
| CN104630860A (en) * | 2015-02-02 | 2015-05-20 | 西安建筑科技大学 | Rare-earth-catalyzed titanizing melting salt pulse electrolysis boronizing method near phase transition temperature |
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