GB782263A - Improvements in the production of a wear-resistant surface on ferrous metal parts - Google Patents
Improvements in the production of a wear-resistant surface on ferrous metal partsInfo
- Publication number
- GB782263A GB782263A GB3331853A GB3331853A GB782263A GB 782263 A GB782263 A GB 782263A GB 3331853 A GB3331853 A GB 3331853A GB 3331853 A GB3331853 A GB 3331853A GB 782263 A GB782263 A GB 782263A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- proportion
- cyanide
- calculated
- cyanate
- 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)
- Chemical Treatment Of Metals (AREA)
Abstract
In a process for producing on ferrous metal parts a sulphurized surface layer, the parts are heated to above 500 DEG C., preferably 560-580 DEG C., in a fused salt bath containing alkali metal cyanide, alkali metal cyanate, active sulphur (i.e. sulphur which shows up on analysis for sulphide), and, where necessary, an inert diluent such as alkali metal chloride or carbonate, the proportion of cyanide (calculated as NaCN) being not less than 3 per cent, the proportions of cyanide and cyanate together (calculated as NaCN + NaCNO) being not less than 10 per cent and the proportion of active sulphur (calculated as S) being in the range 0.1-1.0 per cent, provided that in any case where the proportion of cyanide is 25 per cent or more the active sulphur content does not exceed 0.4 per cent and provided also that the proportions of cyanate and diluent together are such as to bring the fusion point of the bath to a temperature that is 30 DEG C. or more below the operating temperature of the bath. The treatment of specific iron and steel parts is referred to According to the Provisional Specification, the proportion of active sulphur (calculated as Na2S) does not exceed 1 per cent. Specification 640,536 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3331853A GB782263A (en) | 1953-12-01 | 1953-12-01 | Improvements in the production of a wear-resistant surface on ferrous metal parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3331853A GB782263A (en) | 1953-12-01 | 1953-12-01 | Improvements in the production of a wear-resistant surface on ferrous metal parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB782263A true GB782263A (en) | 1957-09-04 |
Family
ID=10351386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3331853A Expired GB782263A (en) | 1953-12-01 | 1953-12-01 | Improvements in the production of a wear-resistant surface on ferrous metal parts |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB782263A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3321338A (en) * | 1963-12-11 | 1967-05-23 | Berliet Automobiles | Friction elements especially resistant to wear by abrasion |
| US9032597B2 (en) | 2010-07-16 | 2015-05-19 | Applied Nano Surfaces Sweden Ab | Method for providing a low-friction surface |
| US10105810B2 (en) | 2014-12-05 | 2018-10-23 | Applied Nano Surfaces Sweden Ab | Mechanochemical conditioning tool |
| US10704111B2 (en) | 2015-11-02 | 2020-07-07 | Applied Nano Surfaces Sweden Ab | Solid lubricant-coated steel articles, method and apparatus for manufacturing thereof and quenching oil used in the manufacturing |
-
1953
- 1953-12-01 GB GB3331853A patent/GB782263A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3321338A (en) * | 1963-12-11 | 1967-05-23 | Berliet Automobiles | Friction elements especially resistant to wear by abrasion |
| US9032597B2 (en) | 2010-07-16 | 2015-05-19 | Applied Nano Surfaces Sweden Ab | Method for providing a low-friction surface |
| US10105810B2 (en) | 2014-12-05 | 2018-10-23 | Applied Nano Surfaces Sweden Ab | Mechanochemical conditioning tool |
| US10704111B2 (en) | 2015-11-02 | 2020-07-07 | Applied Nano Surfaces Sweden Ab | Solid lubricant-coated steel articles, method and apparatus for manufacturing thereof and quenching oil used in the manufacturing |
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