ES440319A1 - Process for nitriding iron and steel in a salt bath - Google Patents
Process for nitriding iron and steel in a salt bathInfo
- Publication number
- ES440319A1 ES440319A1 ES440319A ES440319A ES440319A1 ES 440319 A1 ES440319 A1 ES 440319A1 ES 440319 A ES440319 A ES 440319A ES 440319 A ES440319 A ES 440319A ES 440319 A1 ES440319 A1 ES 440319A1
- Authority
- ES
- Spain
- Prior art keywords
- salt bath
- cyanate
- cyanide
- weight
- calculated
- 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
- C23C8/48—Nitriding
- C23C8/50—Nitriding of ferrous surfaces
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The salt bath contains potassium cyanate and/or sodium cyanate and has air flowing through it. Based on the total weight, the salt bath contains 25-57% by weight of cyanate, calculated as cyanate ion and optionally up to 5% by weight of cyanide, calculated as cyanide ion. Regeneration of the salt bath is effected by adding at least one polymeric carbon/nitrogen compound without removing used salts. In general the salt bath additionally contains sodium carbonate and/or potassium carbonate and may also contain alkali metal chloride. The process is environmentally safe, since owing to the small amounts or absence of cyanide, no toxic effluents are produced. The salt melt has a low viscosity, so that drag-out losses can be kept low. Alloyed and non-alloyed steels of any carbon content and iron can be nitrided to form good nitrided layers.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2441310A DE2441310C3 (en) | 1974-08-29 | 1974-08-29 | Process for nitriding iron and steel in salt baths |
Publications (1)
Publication Number | Publication Date |
---|---|
ES440319A1 true ES440319A1 (en) | 1977-03-16 |
Family
ID=5924348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES440319A Expired ES440319A1 (en) | 1974-08-29 | 1975-08-19 | Process for nitriding iron and steel in a salt bath |
Country Status (14)
Country | Link |
---|---|
JP (1) | JPS5150241A (en) |
AR (1) | AR201799A1 (en) |
AT (1) | AT349046B (en) |
BR (1) | BR7505152A (en) |
CA (1) | CA1058064A (en) |
CH (1) | CH616455A5 (en) |
DE (1) | DE2441310C3 (en) |
ES (1) | ES440319A1 (en) |
FR (1) | FR2283243A1 (en) |
GB (1) | GB1507904A (en) |
IN (1) | IN145225B (en) |
IT (1) | IT1041591B (en) |
SE (1) | SE7509535L (en) |
ZA (1) | ZA755450B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1576143A (en) * | 1977-07-20 | 1980-10-01 | Brico Eng | Sintered metal articles |
BR8705165A (en) * | 1987-09-14 | 1989-04-11 | Alcoa Aluminio Do Nordeste S A | PROCESS FOR THERMAL TREATMENT OF METALLIC ALLOYS |
US4938452A (en) * | 1988-12-10 | 1990-07-03 | Aisan Kogyo Kabushiki Kaisha | Air control device for internal combustion engine |
DE4119820C1 (en) * | 1991-06-15 | 1992-09-03 | Goetz Dr. 5400 Koblenz De Baum | Treatment of iron@ (alloys) on same support - comprises nitriding in molten alkali metal cyanate and quenching in hot aq. salt bath |
DE4324740C1 (en) * | 1993-07-23 | 1994-06-16 | Degussa | Prodn of salt mixture for hardening of steel parts - by pressing together potassium cyanate, potassium carbonate and sodium carbonate. |
FR2972459B1 (en) | 2011-03-11 | 2013-04-12 | Hydromecanique & Frottement | FOUNDED SALT BATHS FOR NITRIDING STEEL MECHANICAL PARTS, AND METHOD FOR IMPLEMENTING THE SAME |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU805954A3 (en) * | 1973-03-05 | 1981-02-15 | Дегусса (Фирма) | Method of regenerating carbonate-containing salt melts for nitriding and/or carburization of metallic articles |
FR2234380A1 (en) * | 1973-06-20 | 1975-01-17 | Stephanois Rech Mecanique Cent | Regenerating cyanate-carbonate molten salt baths - by adding amide pretreated to liberate ammonia |
-
1974
- 1974-08-29 DE DE2441310A patent/DE2441310C3/en not_active Expired
- 1974-12-11 AR AR256865A patent/AR201799A1/en active
-
1975
- 1975-08-04 IN IN1529/CAL/1975A patent/IN145225B/en unknown
- 1975-08-12 BR BR7505152*A patent/BR7505152A/en unknown
- 1975-08-13 CH CH1053975A patent/CH616455A5/en unknown
- 1975-08-19 ES ES440319A patent/ES440319A1/en not_active Expired
- 1975-08-21 IT IT69115/75A patent/IT1041591B/en active
- 1975-08-25 FR FR7526174A patent/FR2283243A1/en active Granted
- 1975-08-26 GB GB35127/75A patent/GB1507904A/en not_active Expired
- 1975-08-26 ZA ZA00755450A patent/ZA755450B/en unknown
- 1975-08-27 SE SE7509535A patent/SE7509535L/en unknown
- 1975-08-28 JP JP50103557A patent/JPS5150241A/en active Pending
- 1975-08-28 AT AT665875A patent/AT349046B/en not_active IP Right Cessation
- 1975-08-29 CA CA234,451A patent/CA1058064A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IN145225B (en) | 1978-09-09 |
IT1041591B (en) | 1980-01-10 |
CA1058064A (en) | 1979-07-10 |
FR2283243A1 (en) | 1976-03-26 |
JPS5150241A (en) | 1976-05-01 |
DE2441310A1 (en) | 1976-03-11 |
ZA755450B (en) | 1976-07-28 |
AR201799A1 (en) | 1975-04-15 |
CH616455A5 (en) | 1980-03-31 |
BR7505152A (en) | 1976-08-03 |
DE2441310C3 (en) | 1978-05-18 |
AT349046B (en) | 1979-03-12 |
ATA665875A (en) | 1978-08-15 |
FR2283243B1 (en) | 1978-04-07 |
GB1507904A (en) | 1978-04-19 |
DE2441310B2 (en) | 1977-09-22 |
SE7509535L (en) | 1976-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES2112786A1 (en) | Method of treating ferrous surfaces subjected to high friction strains | |
FI852937L (en) | FOERFARANDE FOER KONTROLLERING AV ZINKAONGA VID EN GALVANISERINGSMETOD, VARI ETT BAND AV JAERNMETALL NEDSAENKS I SMAELT ZINK. | |
ES440319A1 (en) | Process for nitriding iron and steel in a salt bath | |
GB1504917A (en) | Method of maintaining at very low values the content of cyanide in salt baths containing cyanates | |
GR81882B (en) | ||
ES8606526A1 (en) | Process for improving the corrosion resistance of ferrous metal parts | |
DE3167350D1 (en) | Method of improving adhesion between rubber and metals | |
SE7602838L (en) | SALT BATH FOR BIG COOLING OF BATH-NITRATED CONSTRUCTION ELEMENTS | |
ES315061A1 (en) | Surface treatment for jointly improving friction and fluidtightness | |
ES456820A1 (en) | Metallic descaling system | |
ES353267A2 (en) | Heattreatment of steel | |
GB1504807A (en) | Method of and salt baths for nitriding metals | |
GB1148988A (en) | Electrolytic treatment of metal surfaces | |
GB1498533A (en) | Trivalent chromium plating baths | |
GB1467512A (en) | Treatment of metallic surfaces | |
GB1498532A (en) | Trivalent chromium plating baths | |
ES423504A1 (en) | Process for generating a salt melt bath containing cyanate and carbonate | |
AU550223B2 (en) | Non-cyanide fused salt bath composition containing lithium for carburizing iron | |
GB1223952A (en) | Method of carburising steels in cyanide-free fused salt baths | |
ES302733A1 (en) | Improvements in the production of a wear-resistant surface on ferrous metal parts | |
GB1377098A (en) | Method for surface hardening steel and cemented carbides | |
EP0147011A3 (en) | A non-cyanide salt bath and process for carburization of ferrous metals and alloys | |
FR2280715A1 (en) | Molten cyanate salt bath contg. hydroxides - to prevent degeneration to cyanide | |
SE7712094L (en) | WAY TO TREAT A SURFACE, AS WELL AS A SOLUTION FOR THE SET'S IMPLEMENTATION | |
KR910003127A (en) | How lead gold removes thallium from now |