AT110591B - Case hardening powder. - Google Patents
Case hardening powder.Info
- Publication number
- AT110591B AT110591B AT110591DA AT110591B AT 110591 B AT110591 B AT 110591B AT 110591D A AT110591D A AT 110591DA AT 110591 B AT110591 B AT 110591B
- Authority
- AT
- Austria
- Prior art keywords
- weight
- parts
- case hardening
- hardening powder
- coal
- Prior art date
Links
- 239000000843 powder Substances 0.000 title claims description 6
- 239000003245 coal Substances 0.000 claims description 5
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 4
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003830 anthracite Substances 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 2
- 239000004317 sodium nitrate Substances 0.000 claims description 2
- 235000010344 sodium nitrate Nutrition 0.000 claims description 2
- 150000002823 nitrates Chemical class 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 3
- 239000004323 potassium nitrate Substances 0.000 description 3
- 235000010333 potassium nitrate Nutrition 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000000731 Fagus sylvatica Species 0.000 description 1
- 235000010099 Fagus sylvatica Nutrition 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Description
<Desc/Clms Page number 1>
Einsatzhärtepulver.
Zum Zementieren des nicht härtbaren Eisens hat man früher stickstoffhaltige Kohlen, wie z. B. solche aus Lederabfällen, Horn und Klauen usw., verwendet, um beim Glühen in den Einsatzkästen ein tieferes und rascheres Eindringen des Kohlenstoffes in das Eisen zu bewirken. Aus solchen Stoffen hergestellte Kohle ist verhältnismässig teuer ; werden aber die Einsatzkästen mit den stickstoffhaltigen Abfällen selbst beschickt, so geht durch das bei der Verkohlung eintretende Schwinden viel von der Wirkung der stickstoffhaltigen Kohle verloren. Auch die Verwendung eines Gemisches von Holzkohle und Anthrazit mit Karbonaten einerseits, sowie der Zusatz eines Nitrates zu Einsatzhärtepulvern anderseits ist bereits bekannt.
Gemäss der Erfindung wird nun eine bestimmte Mischung, nämlich von 50 Gewichtsteilen Buchenholzkohle, 20 Gewichtsteilen Anthrazit, 25 Gewichtsteilen Soda und 5 Gewichtsteilen Natronsalpeter, vorteilhaft als Einsatzhärtepulver verwendet. Das zu kohlende Eisen wird damit in luftdicht verschlossene Glühkästen eingesetzt. Unter Einwirkung der Hitze reagiert der Salpeter mit der Kohle unter Bildung von Kohlensäure oder Kohlenoxyd und Stickstoff. Durch die Verbrennung eines Teiles der Kohle mit dem Salpeter wird das Eisen rasch auf die zur Kohlung notwendige Temperatur gebracht, so dass die Glühzeit wesentlich abgekürzt wird. Die entstehenden gasförmigen Produkte bewirken durch die Druckerhöhung im Glühkasten gleichfalls eine raschere und tiefer reichende Kohlung.
Das vorliegende Einsatzhärtepulver hat auch den Vorteil, dass es nach Zusatz geringer Mengen von Salpeter mehrmals wiederverwendet werden kann.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Case hardening powder.
For cementing the non-hardenable iron, one used to have nitrogen-containing coals, such as. B. those from leather waste, horn and claws, etc., used to bring about a deeper and faster penetration of the carbon into the iron when glowing in the insert boxes. Coal made from such materials is relatively expensive; but if the insert boxes themselves are filled with the nitrogenous waste, much of the effect of the nitrogenous coal is lost due to the shrinkage that occurs during the carbonization. The use of a mixture of charcoal and anthracite with carbonates, on the one hand, and the addition of a nitrate to case hardening powders, on the other hand, is already known.
According to the invention, a certain mixture, namely of 50 parts by weight of beech charcoal, 20 parts by weight of anthracite, 25 parts by weight of soda and 5 parts by weight of sodium nitrate, is advantageously used as a case-hardening powder. The iron to be carbonized is then placed in annealing boxes that are sealed airtight. Under the action of heat, the saltpetre reacts with the coal to form carbonic acid or carbon dioxide and nitrogen. By burning part of the coal with the saltpetre, the iron is quickly brought to the temperature required for carbonization, so that the glow time is significantly shortened. The resulting gaseous products also cause faster and deeper carbonation due to the pressure increase in the annealing box.
The present case hardening powder also has the advantage that it can be reused several times after adding small amounts of saltpetre.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT110591T | 1927-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT110591B true AT110591B (en) | 1928-09-10 |
Family
ID=3626512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT110591D AT110591B (en) | 1927-01-11 | 1927-01-11 | Case hardening powder. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT110591B (en) |
-
1927
- 1927-01-11 AT AT110591D patent/AT110591B/en active
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