DE677867C - Process for the production of workpieces which are provided with hard metal supports or inlays - Google Patents
Process for the production of workpieces which are provided with hard metal supports or inlaysInfo
- Publication number
- DE677867C DE677867C DEM137311D DEM0137311D DE677867C DE 677867 C DE677867 C DE 677867C DE M137311 D DEM137311 D DE M137311D DE M0137311 D DEM0137311 D DE M0137311D DE 677867 C DE677867 C DE 677867C
- Authority
- DE
- Germany
- Prior art keywords
- metal
- hard metal
- inlays
- workpieces
- production
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/06—Casting in, on, or around objects which form part of the product for manufacturing or repairing tools
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Description
Verfahren zum Herstellen von Werkstücken, die mit Hartmetallauflagen oder -einlagen versehen sind Gegenstand des Hauptpatents ist ein Verfahren zum Herstellen von Werkstücken, die mit Hartmetallau@lagen oder -einlagen versehen sind und bei denen das Hartmetall in Pulverform in eine Gießform eingebracht wird, die alsdann mit dem Trägermetall ausgefüllt wird. Nach dem Hauptpatent wird das Hartmetall als Pulver ohne Bindemittel durch ein Schutzgitter, z. B. aus Drahtgeflecht oder gelochtem Blech, in der Form gehalten, wobei ein Teil des Trägermetalls durch das Schutzgitter hindurch in das Hartmetall einseigert.Process for the production of workpieces with hard metal supports or inlays are the subject of the main patent is a method of manufacture of workpieces that are provided with hard metal layers or inlays and are enclosed which the hard metal is introduced in powder form into a casting mold, which then is filled with the carrier metal. According to the main patent, the hard metal is called Powder without binder through a protective grid, e.g. B. made of wire mesh or perforated Sheet metal, held in shape, with part of the carrier metal through the protective grille segregated through into the hard metal.
Es hat sich nun gezeigt, daß es in gewissen Fällen vorteilhaft ist, an Stelle eines Schutzgitters nichtgelochte, also vollwandige Bleche zum Halten des Hartmetallpulvers in der Gießform zu verwenden. Die Anwendung solcher vollwandiger Bleche ist insbesondere dann von Vorteil, wenn das in das Hartmetallpulver einzuseigernde Metall ein anderes sein soll als das hinter der Hartmetallauflage einzubringende Trägermetall. In einem solchen Falle geschieht das Eingießen der Trägermetalle vor und hinter dem Halteblech, wobei die beiden Metalle entweder gleichzeitig oder auch hintereinander eingegossen werden können. Zweckmäßig wird für das Halteblech ein Metall verwendet, welches sich mit dem oder den einzugießenden Trägermetallen an der Oberfläche legiert, aber normalerweise nicht vollständig schmilzt.It has now been shown that in certain cases it is advantageous Instead of a protective grille, non-perforated, i.e. full-walled sheets for holding of the hard metal powder in the casting mold. The application of such full-walled Sheet metal is particularly advantageous if the material to be incorporated into the hard metal powder The metal should be different from the one to be introduced behind the hard metal support Carrier metal. In such a case, the carrier metals are poured in beforehand and behind the retaining plate, the two metals either simultaneously or also can be poured one after the other. It is useful for the retaining plate to be a Metal used, which is with the carrier metal or metals to be poured alloyed on the surface, but usually does not melt completely.
Die Erfindung ist insbesondere dann von Bedeutung, wenn bei Verwendung zweier verschiedener Metalle vor und hinter dem Halteblech die beiden Metalle verschieden hohe Schmelzpunkte haben oder wenn auch bei Anwendung eines einheitlichen Trägermetalls das einzugießende Metall einen langen Weg zurückzulegen hat, so daß es möglicherweise nicht. mehr dünnflüssig genug ist, um das Hartmetallpulver zu durchdringen.The invention is particularly important when in use of two different metals in front of and behind the retaining plate, the two metals are different have high melting points or even if a single carrier metal is used the metal to be poured has a long way to go so that it may not. is more thin enough to penetrate the hard metal powder.
In gewissen Fällen kann es auch zweckmäßig sein, das Blech so dünn zu wählen,» daß es beim Einfüllen des Trägermetalls schmilzt. Es braucht dann nur eine Eingießstelle vorgesehen zu sein. Das gegen das Blech fließende Metall schmilzt zuerst dieses nieder und dringt dann in das Hartmetallpulver ein. Natürlich kann man aber auch bei einem dünnen, niederschmelzenden Blech je eine Eingießstelle für das Trägermetall vor und hinter dem Blech vorsehen.In certain cases it can also be useful to make the sheet so thin to choose »that it melts when the carrier metal is poured in. Then it just needs a pouring point to be provided. The metal flowing against the sheet melts first this down and then penetrates into the hard metal powder. Of course you can but one too one for each thin, low-melting sheet Provide a pouring point for the carrier metal in front of and behind the sheet metal.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM137311D DE677867C (en) | 1937-02-26 | 1937-02-26 | Process for the production of workpieces which are provided with hard metal supports or inlays |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM137311D DE677867C (en) | 1937-02-26 | 1937-02-26 | Process for the production of workpieces which are provided with hard metal supports or inlays |
Publications (1)
Publication Number | Publication Date |
---|---|
DE677867C true DE677867C (en) | 1939-07-04 |
Family
ID=7333783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM137311D Expired DE677867C (en) | 1937-02-26 | 1937-02-26 | Process for the production of workpieces which are provided with hard metal supports or inlays |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE677867C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE767421C (en) * | 1940-03-19 | 1952-11-04 | Bochumer Ver Fuer Gussstahlfab | Process for the production of soft iron powder |
DE754152C (en) * | 1941-09-09 | 1953-06-01 | Deutsche Edelstahlwerke Ag | Process for the production of composite castings |
-
1937
- 1937-02-26 DE DEM137311D patent/DE677867C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE767421C (en) * | 1940-03-19 | 1952-11-04 | Bochumer Ver Fuer Gussstahlfab | Process for the production of soft iron powder |
DE754152C (en) * | 1941-09-09 | 1953-06-01 | Deutsche Edelstahlwerke Ag | Process for the production of composite castings |
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