DE1072778B - Molding compound and coating for casting magnesium and its alloys - Google Patents
Molding compound and coating for casting magnesium and its alloysInfo
- Publication number
- DE1072778B DE1072778B DENDAT1072778D DE1072778DA DE1072778B DE 1072778 B DE1072778 B DE 1072778B DE NDAT1072778 D DENDAT1072778 D DE NDAT1072778D DE 1072778D A DE1072778D A DE 1072778DA DE 1072778 B DE1072778 B DE 1072778B
- Authority
- DE
- Germany
- Prior art keywords
- alloys
- magnesium
- coating
- molding compound
- sand
- 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.)
- Pending
Links
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims description 8
- 238000005266 casting Methods 0.000 title claims description 8
- 239000011777 magnesium Substances 0.000 title claims description 8
- 229910052749 magnesium Inorganic materials 0.000 title claims description 7
- 229910045601 alloy Inorganic materials 0.000 title claims description 6
- 239000000956 alloy Substances 0.000 title claims description 6
- 238000000465 moulding Methods 0.000 title claims description 3
- 238000000576 coating method Methods 0.000 title description 3
- 239000011248 coating agent Substances 0.000 title description 2
- 150000001875 compounds Chemical class 0.000 title description 2
- 239000004576 sand Substances 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 6
- 229910052790 beryllium Inorganic materials 0.000 claims description 4
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 238000007792 addition Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000004513 sizing Methods 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- 229910000861 Mg alloy Inorganic materials 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000003110 molding sand Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
Formmasse und Schlichte zum Vergießen von Magnesium und seinen Legierungen Beim Gießen von Magnesium und seinen Legierungen in Sandformen besteht die Gefahr der Oxyda.tion, hervorgerufen durch den Sauerstoff der Luft und durch die Feuchtigkeit des Fcyrmsandes. Man ha't bisher diese Oxydation durch Schwefelzusätze zu verhindern gesucht. Durch Zusätze von 5 bis 8% Schwefelpulver zum Sand war es möglich, beim Gießen von Magnesium und Magnesiumlegierungen in grünem Sand einwandfreie Abgüsse zu erhalten. Beim Gießen in eine solche Sandform entstehen jedoch S 0.-Gase, die sich in der Luft der Gießereihalle ausbreiten und das Personal belästigen.Molding compound and coating for casting magnesium and its alloys When casting magnesium and its alloys in sand molds, there is a risk of oxidation caused by the oxygen in the air and the moisture in the molten sand. Up to now, attempts have been made to prevent this oxidation by adding sulfur. By adding 5 to 8% sulfur powder to the sand, it was possible to get flawless casts when casting magnesium and magnesium alloys in green sand. When pouring into such a sand mold, however, S 0 gases are produced, which spread through the air in the foundry hall and annoy the staff.
Es ist bereits bekannt, daß man durch Berylliumzusätze zur Magnesiumlegierung einen außerordentlich starken Oxydationsschutz des flüssigen Metalls und eine Verringerung der Reaktionen beim Gießen von Magnesiumlegierungen in grüne Sandformen erreichen kann. Eine solche Verfahrensweise hat jedoch den Nachteil, daß eine starke Kornvergröberung des Metalls und ein erheblicher Abfall der mechanischen Werte in Kanf genommen werden muß.It is already known that by adding beryllium to the magnesium alloy, an extremely strong oxidation protection of the liquid metal and a reduction in the reactions when casting magnesium alloys in green sand molds can be achieved. Such a procedure has j edoch the disadvantage that a strong grain growth of the metal and a significant drop in the mechanical properties must be taken in Kanf.
Es wurde nun gefunden, daß man mit wesentlich geringeren Schwefelzti-sätzen zum Sand auskommen und sogar diese völlig weglassen kann, wenn man die Magnesium-oder Magnesiumlegierungsschmelzenbeim Gießen durch Beryllium und/oder Titan oder deren Salze vor Oxydation schützt, indem man dem Formsand Beimengungen von Beryllium- und/oder Titansalzen gibt. Diese können den Schwefel ganz oder zum Teil ersetzen. Es war überraschend, daß solche Zusätze zum Formsand sich günstig auf das Gießen von Magnesium und seinen Legierungen auswirken. Außerdem treten die bekannten Schädigungen des Gußstückes sowie, sofern der Schwefelzusatz vermindert oder Schwefel ganz weggelassen wird, eine Geruchsbelästigung in entsprechend geringerem Maße oder gar nicht mehr auf.It has now been found that one can use significantly lower sulfur rates get along with the sand and even omit this completely if you have the magnesium or Magnesium alloy melts when poured through beryllium and / or titanium or their Salts are protected from oxidation by adding beryllium to the molding sand. and / or titanium salts. These can replace the sulfur in whole or in part. It was surprising that such additives to the molding sand were beneficial for casting of magnesium and its alloys. In addition, the known damage occurs of the casting and if the addition of sulfur is reduced or sulfur is omitted entirely odor nuisance to a correspondingly lesser extent or no longer at all on.
Es ist außerdem möglich, die Sandformen mit Bervilium und/oder Titanpulver und/oder deren Salzen'zu schlichten. Dies kann sowohl trocken durch Anwendung der Metalle oder Salze in Form von Pulver vorgenommen werden oder auch in Form von Aufschlämmungen der Metallpulver und der Salze, beispielsweise in Wasser. Auch hierdurch läßt sich der Gehalt des Formsandes an Schwefel erniedrigen oder völlig vermeiden.It is also possible to make the sand molds with Bervilium and / or titanium powder and / or their salts to size. This can be done both by applying the dry Metals or salts can be made in the form of powder or also in the form of slurries the metal powder and the salts, for example in water. This, too, can be reduce the sulfur content of the molding sand or avoid it completely.
Bei Zumischung zum Sand sind Salzmengen von etwa 1 1/o vorteilhaft. Bei Anwendung in Form von Schlichten genügt ein dünner Auftrag auf der Formoberfläche.When mixed with the sand, amounts of salt of about 1 1 / o are advantageous. When used in the form of coatings, a thin application on the mold surface is sufficient.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1072778B true DE1072778B (en) | 1960-01-07 |
Family
ID=597175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT1072778D Pending DE1072778B (en) | Molding compound and coating for casting magnesium and its alloys |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1072778B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1508679B1 (en) * | 1965-12-01 | 1971-08-26 | Chromow Alexey M | Process for the production of precision casting molds with lost models |
-
0
- DE DENDAT1072778D patent/DE1072778B/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1508679B1 (en) * | 1965-12-01 | 1971-08-26 | Chromow Alexey M | Process for the production of precision casting molds with lost models |
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