DE669443C - Cementation bath - Google Patents
Cementation bathInfo
- Publication number
- DE669443C DE669443C DE1930669443D DE669443DD DE669443C DE 669443 C DE669443 C DE 669443C DE 1930669443 D DE1930669443 D DE 1930669443D DE 669443D D DE669443D D DE 669443DD DE 669443 C DE669443 C DE 669443C
- Authority
- DE
- Germany
- Prior art keywords
- cementation
- barium
- chloride
- bath
- baths
- 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
-
- 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
- C23C8/44—Carburising
- C23C8/46—Carburising 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
Zementationsschmelzbad Die Erfindung bezieht sich auf das Zementieren von Eisen, Stählen und deren Legierungen in Bariumcyanid, Bariumchlorid und ge-@ebenenfalls noch den Schmelzpunkt des Bariumchlorids herabsetzenden Salzen, wie Alkalichloriden u. dgl., enthaltenden Schmelebädern.Cementation Molten Bath The invention relates to cementation of iron, steels and their alloys in barium cyanide, barium chloride and likewise nor salts which lower the melting point of barium chloride, such as alkali chlorides and the like., containing melt baths.
ach vorliegender Erfindung werden zum Zementieren Schmelzbäder der vorstehend bezeichneten Art verwendet, welche durch einen Gehalt-von Strontiumverbindungen, wie Strontiumchlorid, Strontiumcarbonat, Strontiumhydrotyd, Strontiumhydrobromid, gekennzeichnet sind.According to the present invention, molten baths are used for cementing type described above, which by a content of strontium compounds, such as strontium chloride, strontium carbonate, strontium hydrotide, strontium hydrobromide, Marked are.
Die Herstellung derartiger Zementierbäder kann in einfachster Weise dadurch erfolgen, daß man in die Bariumchlorid, zweckmäßig in größeren Mengen, enthaltenden Schmelzen Alkalicyanid einträgt und durch Umsetzung mit Bariumchlorid Bariumcyanid in gewünschten Mengen erzeugt.Such cementing baths can be produced in the simplest possible manner take place in that one in the barium chloride, advantageously in larger amounts, containing Melting alkali metal cyanide enters and barium cyanide by reaction with barium chloride produced in desired quantities.
Die Bariumcyanid neben größeren Mengen von Bariumchlorid enthaltenden Bäder entfalten auch bei Abwesenheit von Strontiumverbindungen Zementationswirkungen, welche die der bekannten, beträchtliche Mengen von Alkalicyanid, z. B. q.o bis 7 5 oro Natriumcyanid, enthaltenden Zementierbäder übertreffen, und zwar auch dann, wenn verhältnismäßig wenig Bariumcvanid, z. B. nur einige Prozente, in der Schmelze vorhanden sind; sie besitzen aber den Nachteil, daß die Zementationswirkung verhältnismäßig rasch nachläßt, und zwar auch dann, wenn noch eine .an sich genügende Menge von Bariumcyanid in dem Bad vorhanden ist.The barium cyanide in addition to containing larger amounts of barium chloride Baths develop cementation effects even in the absence of strontium compounds, which those of the known, considerable amounts of alkali metal cyanide, e.g. B. q.o to 7 5 oro sodium cyanide containing cement baths, even then, if relatively little barium cvanide, e.g. B. only a few percent in the melt available; but they have the disadvantage that the cementation effect is proportionate decreases rapidly, even if there is still a sufficient amount of Barium cyanide is present in the bath.
Es wurde nun gefunden, daß man durch Zusatz von Strontiumverbindungen zu bariumcyanidhaltigen Bädern der vorstehend gekennzeichneten Art den Zementationsvorgang derart beschleunigen bzw. regeln kann, daß die Zementationswirkungen der Bäder auch bei langer Betriebsdauer praktisch Bleichbleiben.It has now been found that by adding strontium compounds the cementation process for barium cyanide-containing baths of the type identified above can accelerate or regulate in such a way that the cementation effects of the baths too Practically remains pale after long periods of operation.
Die beschleunigende Wirkung der Stro.ntiumverbindungen und die hierdurch bedingte Regelung des Zementationsvorgangs war fachmännisch nicht vorauszusehen. Wenn man nämlich Bäder verwendet, welche neben Bariumcyanid und Bariumchlorid noch Calciumsalze, z. B. Calciumchlorid, enthalten, so erfolgt eine so rasche Freisetzung großer Mengen von Kohlenstoff, daß von einer entsprechenden Aufnahme durch die zu behandelnden Werkstücke keine Rede sein kann und infolgedessen große Mengen von Kohlenstoff nutzlos verbrennen. Demgegenüber ist es bei Verwendung von Strontiumverbindungen möglich, die freigesetzten Kohlenstoffmengen dem Vorschreiten der Zementation anzupassen.The accelerating effect of the Stro.ntiumverbindungen and the resulting A conditional regulation of the cementation process could not be foreseen by experts. If you use baths, which in addition to barium cyanide and barium chloride Calcium salts, e.g. B. calcium chloride contain, so is such a rapid release large amounts of carbon, that of a corresponding intake by the too treated workpieces can be out of the question and, as a result, large quantities of Burning carbon uselessly. In contrast, it is when using strontium compounds possible to adapt the amount of carbon released as the cementation progresses.
Im übrigen wird durch den Zusatz von Strontiumverbindungen die Dünnflüssigkeit der Schmelzen erhöht, was bekanntlich für die Durchführung des Zementiervorgangs von erheblichem Vorteil- ist-. Bei der Herstellung der Bäder empfiehlt @es sich, für Anwesenheit größerer Mengen von Bariumchlorid Sorge zu tragen. Im allgemeinen ist es zweckmäßig, den Gehalt des Bades an Bariumchlorid über q.00/0 zu halten.In addition, the addition of strontium compounds makes the fluid thin the melting increases what is known for the Carrying out the cementing process is of considerable advantage. When making the baths, it is recommended that to ensure that large amounts of barium chloride are present. In general it is advisable to keep the barium chloride content of the bath above q.00 / 0.
Ein für praktische Zwecke vorzüglich geeignetes Zementierbad gemäß
Erfindung kann z. B. folgendermaßen zusammengesetzt sein:
Man kann dem Schmelzbad mit Vorteil auch noch fein verteilte Kohle einverleiben. Die Menge des Kohlenzusatzes wird zweckmäßig in engen Grenzen gehalten.It is advantageous to add finely divided coal to the weld pool incorporate. The amount of coal added is expediently kept within narrow limits.
Für die Durchführung der Zementierarb.eit mit Bädern der beanspruchten Art eignen sich im allgemeinen Temperaturen von etwa 85o bis etwa 95o°.For carrying out the cementing work with baths of the claimed In general, temperatures of about 85o to about 95o ° are suitable.
Der Zusatz von Strontiumverbindungen zu nicht zementierend wirkenden Schmelzbädern ist bekannt. -The addition of strontium compounds to non-cementing ones Melt baths are known. -
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE669443T | 1930-02-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE669443C true DE669443C (en) | 1938-12-27 |
Family
ID=6590182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1930669443D Expired DE669443C (en) | 1930-02-02 | 1930-02-02 | Cementation bath |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE669443C (en) |
-
1930
- 1930-02-02 DE DE1930669443D patent/DE669443C/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE669443C (en) | Cementation bath | |
DE685688C (en) | Process for the manufacture of copper ruby glasses | |
US1980152A (en) | Fused salt bath for carburizing iron, steel, and the like | |
DE688152C (en) | Saltpeter baths resistant to decomposition | |
DE622445C (en) | From indifferent salts, e.g. Table salt, potassium chloride and the like Like., And finely divided coal existing cementation bath | |
AT135990B (en) | Process for cementing iron, steel and their alloys. | |
AT133872B (en) | Process and means for cementing iron, steel and their alloys. | |
DE800132C (en) | Melt bath for carburizing and decarburization-free heat treatment of steels | |
DE647951C (en) | Process for cementing objects made of iron, steel and their alloys | |
DE726981C (en) | Process for enriching the sodium content in cryolites | |
DE931954C (en) | Use of cyanide-containing molten salt baths for heating files | |
AT150275B (en) | Process for heat treatment, in particular cementation of iron, steel and their alloys in molten baths. | |
AT101316B (en) | Process for the production of cyanides from cyanamide salts. | |
DE759607C (en) | Process for the preparation of substituted 2, 6-diaminotriazines-1, 3, 5 (guanamines) | |
DE883543C (en) | Process for the production of surface layers of high wear resistance on objects made of iron alloys | |
AT258993B (en) | Process for carburizing and carbonitriding of alloyed and unalloyed steels | |
DE638579C (en) | Process for regulating the cementation effect of cementation baths containing cyanide | |
AT136817B (en) | Process for the production of tungsten metal. | |
AT131564B (en) | Method and means for cementing and hardening objects made of iron, iron alloys, steel and the like. like | |
DE463238C (en) | Process for the production of lead chloride by treating raw materials containing lead sulphate with chloride solutions | |
DE620978C (en) | Process for regulating the cementation effect of cementation baths containing cyanide | |
DE431508C (en) | Working with hot solutions of ammonium chloride, which contain ammonium nitrate in addition to ammonium chloride | |
DE421988C (en) | Process for the production of potassium nitrate from potassium chloride and calcium or magnesium nitrate | |
CH210116A (en) | Method of hardening files. | |
DE859063C (en) | Metallic material containing fluorine |