DE136421C - - Google Patents
Info
- Publication number
- DE136421C DE136421C DENDAT136421D DE136421DA DE136421C DE 136421 C DE136421 C DE 136421C DE NDAT136421 D DENDAT136421 D DE NDAT136421D DE 136421D A DE136421D A DE 136421DA DE 136421 C DE136421 C DE 136421C
- Authority
- DE
- Germany
- Prior art keywords
- milling cutter
- carbon
- hardened
- well
- crucible
- 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.)
- Active
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 238000003801 milling Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910000805 Pig iron Inorganic materials 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229910000499 pig iron Inorganic materials 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 229910001315 Tool steel Inorganic materials 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
- 238000003754 machining Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 229910000754 Wrought iron Inorganic materials 0.000 description 2
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 239000000289 melt material Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/02—Crucible furnace process
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Das Verfahren vorliegender Erfindung bezweckt die Herstellung eines zum unmittelbaren Giefsen von Fräsern geeigneten, bearbeitungsfähigen und härtbaren Werkzeugstahls und besteht darin, dafs Stahl oder Abfallstahl mit Roheisen im Tiegel verschmolzen wird und der überflüssige Kohlenstoff im Tiegel durch Puddeln wieder abgeschieden wird.The method of the present invention aims to produce one for the immediate Casting of milling cutters made of suitable, machinable and hardenable tool steel and consists in the fact that steel or scrap steel fused with pig iron in the crucible and the excess carbon is separated out again in the crucible by puddling will.
Bisher hat man nur Legirungen für Bohr- und Schneidewerkzeuge hergestellt; s. beispielsweise deutsches Patent 62852 und englisches Patent 16707/1900. Die Legirungen waren Selbsthärtelegirungen, sie haben die Härte von gehärtetem und angelassenem Stahl. Die Werkzeuge wurden unmittelbar durch Giefsen einer bestimmten Legirung ohne Weiteres fertig gestellt und benutzt, sie sind dann nicht mehr bearbeitungsfähig, nicht mehr härtbar.So far one has only produced alloys for drilling and cutting tools; see for example German patent 62852 and English patent 16707/1900. The alloys were Self-hardening alloy, they have the hardness of hardened and tempered steel. The tools were immediately finished and used by casting a certain alloy, they are then no longer machinable, no longer hardenable.
Anders das vorliegende Verfahren. Bei diesem wird der Stahl zunächst mit Roheisen im Tiegel in bekannter Weise verschmolzen, aber es wird der überflüssige Kohlenstoff im Tiegel durch Puddeln wieder abgeschieden.The present proceedings are different. In this case, the steel is first placed in the crucible with pig iron fused in a known way, but it gets the excess carbon in the crucible deposited again by puddling.
Die Ausführung vorliegenden Verfahrens ist folgende:The execution of the present procedure is as follows:
Man schmilzt eine Mischung, entweder von Gufseisen, Gufsstahl und Schmiedeisen oder Schmiedeisen und Gufseisen oder blos Gufsstahl, kurzum ein Material, dessen Kohlenstoffgehalt demjenigen entspricht, den das Material der herzustellenden Fräser haben soll. Da nun solches Material wegen des verhältnifsmäfsig geringen Kohlenstoffgehalts nur sehr schwer schmelzbar ist, so wird dem Einsatz ein bedeutender Ueberschufs an Kohlenstoff durch Zugabe von sehr kohlenstoffreichem Eisen (graues Roheisen, Gufseisen) zugesetzt. Dieser nun leicht schmelzende Gesammteinsatz hat einen bedeutenden Ueberschufs an Kohlenstoff, der nur zu einem ganz kleinen Theil durch Oxydation während des Schmelzens verringert wird. Durch diesen verhältnifsmäfsig hohen Procentsatz an Kohlenstoff schmilzt nicht nur der Gesammteinsatz sehr leicht, sondern der Kohlenstoff bindet sich aufserordentlich gleichmäfsig in dem dünnflüssigen Metall, so dafs dieses eine vollkommen homogene Beschaffenheit erhält.One melts a mixture, either of cast iron, cast steel and wrought iron or Wrought iron and cast iron or just cast steel, in short a material with its carbon content corresponds to that which the material of the milling cutter to be manufactured should have. Because now Such a material is very difficult because of the relatively low carbon content is fusible, the use of a considerable excess of carbon will result Addition of very carbon-rich iron (gray pig iron, cast iron) added. This now easily melting total input has a significant excess of carbon, which is reduced only to a very small extent by oxidation during melting will. This relatively high percentage of carbon not only melts the total use very easily, but the carbon binds itself extremely evenly in the thin metal, so that it has a perfectly homogeneous consistency receives.
Jetzt mufs man, um ein Material zu bekommen, welches härtbar und bearbeitungsfähig ist und auch genügende Festigkeit hat, aus dem Gesammteinsatz, nachdem dieser vollkommen dünnflüssig geschmolzen ist, den Ueberschufs an Kohlenstoff wieder entfernen, um ein Material von dem früher festgesetzten Kohlenstoffgehalt für den Fräser zu erhalten. Dies geschieht dadurch, dafs das flüssige Schmelzgut im Tiegel tüchtig gerührt (gepuddelt) und dadurch in innige Berührung mit dem Sauerstoff der Luft gebracht wird. Dadurch verbrennt ein gröfserer Theil des Kohlenstoffes zu Kohlensäure. Durch diese Verbrennung wird nun gleichzeitig die Eigenwärme des Gesammteinsatzes erhöht, also das Schmelzgut auf eine höhere Temperatur gebracht, wodurch an und für sich ein Dickflüssigwerden des Schmelzgutes, verursachtNow you have to get a material that is hardenable and machinable is and also has sufficient strength, from the total use, after this is perfect If it is thinly melted, remove the excess carbon again to make a material different from the one previously established Get carbon content for the cutter. This happens because the liquid Melt material in the crucible thoroughly stirred (puddled) and thus in intimate contact with is brought to the oxygen in the air. In this way a greater part of the carbon burns up to carbonic acid. Through this combustion, the own heat of the total input is now increased at the same time, i.e. that Melting material brought to a higher temperature, which in and of itself makes it viscous of the melt material
Claims (1)
Eisen verkauft wird.The product obtained by Giefsen is a rough milling cutter which, for the sake of completion, only needs to be finished, back-turned and ground, and indeed the milling cutter itself has such a uniform structure and, as a result, a great machining ability that it is not necessary to remove the workpieces before the .Working 'to anneal. The material is easier to process than Gufsslahl and can be hardened just as well as this. Is the. Processing, done; in this way the milling cutter is hardened and can be used like any other milling cutter. The milling cutters produced in this way have an extraordinarily large cutting ability when hardened. You can also use scrap steel in the present process for fusing, the
Iron is sold.
Verfahren zur Herstellung eines zum unmittelbaren Giefsen von Fräsern geeigneten, härtbaren Werkzeugstahls durch Verschmelzen von (Abfall-) Stahl mit Roheisen im Tiegel, dadurch gekennzeichnet, dafs der überschüssige Kohlenstoff im Tiegel durch Puddeln wieder abgeschieden wird.Patent-A ν saying:
Process for the production of a hardenable tool steel suitable for direct casting of milling cutters by fusing (waste) steel with pig iron in the crucible, characterized in that the excess carbon is deposited again in the crucible by puddling.
Publications (1)
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DE136421C true DE136421C (en) |
Family
ID=404381
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Country Status (1)
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