DE335405C - Process for the production of very hard, but ductile and break-resistant tools from carbon-containing metals - Google Patents

Process for the production of very hard, but ductile and break-resistant tools from carbon-containing metals

Info

Publication number
DE335405C
DE335405C DE1918335405D DE335405DD DE335405C DE 335405 C DE335405 C DE 335405C DE 1918335405 D DE1918335405 D DE 1918335405D DE 335405D D DE335405D D DE 335405DD DE 335405 C DE335405 C DE 335405C
Authority
DE
Germany
Prior art keywords
carbon
hard
ductile
break
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
Application number
DE1918335405D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LOHMANN METALL GmbH
Original Assignee
LOHMANN METALL GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LOHMANN METALL GmbH filed Critical LOHMANN METALL GmbH
Application granted granted Critical
Publication of DE335405C publication Critical patent/DE335405C/en
Expired legal-status Critical Current

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
    • C23C8/02—Pretreatment of the material to be coated
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt
    • C22C1/1068—Making hard metals based on borides, carbides, nitrides, oxides or silicides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Forging (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Description

Verfahren zur Herstellung sehr harter, aber dehnbarer und gegen Bruch widerstandsfähiger Werkzeuge aus kohlenstoffhaltigen metallen. Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Werkzeugen, welche sehr hart, aber dehnbar -und gegen- Bruch widerstandsfähig sind, aus Metallen, beispielsweise '\?'Grolfram, Titan, Molybdän, Chrom oder Eisen. Außer zu Werkzeugen können die erhaltenen Metalle auch für andere Zwecke verwendet werden. Die harten Eigenschaften der bisherigen Materialien, welche man zu Werkzeugen benutzte, beruhen auf ihrem Gehalt an Kohlenstoff, wobei' entweder die Härtung durch Abschrecken vorgenommen werden muß, oder - bei einer zweiten Gruppe - der Kohlenstoffgehalt an sich die Ursache der Härte ist. Zur ersten Gruppe gehören beispiefsweise Stahl und die verschiedenen Stahllegierungen, zur zweiten Gruppe Siliziumkarbid und Wolframkarbid. Beide Gruppen haben den Nachteil, daß das harte Material nicht bz-w. sehr wenig dehnbar ist und demnach durch Schmiede-, Walz-, Hämmer- und Preßprozesse nicht bearbeitet werden kann. Die Herstellung eines Materials, welches unter Beibehaltung seiner Härte bzw. sogar Vergrößerung der Härte mechanischen Bearbeitungsverfahren unterworfen werden kann, bedeutet naturgemäß einen großen Fortschritt.Process for making very hard, but more ductile and against breakage more resistant tools made of carbonaceous metals. The invention relates focus on a method of making tools that are very hard but ductile -and are resistant to breakage, made of metals, for example '\?' Grolfram, Titanium, molybdenum, chromium or iron. In addition to tools, the metals obtained can be used can also be used for other purposes. The harsh properties of the previous Materials used in tools are based on their carbon content, where 'either the hardening must be carried out by quenching, or - at a second group - the carbon content itself is the cause of hardness. The first group includes, for example, steel and the various steel alloys, to the second group silicon carbide and tungsten carbide. Both groups have the disadvantage that the hard material is not or. is very little elastic and therefore by forging, Rolling, hammering and pressing processes cannot be processed. Making a Material, which while maintaining its hardness or even increasing the hardness Can be subjected to mechanical machining processes means naturally a great step forward.

DasVerfahren wird so ausgeübt, daß durch Gießen ein Körper ohne jeden Kohlenstoff-Behalt oder mit so wenig Kohlenstoffgehalt hergestellt wird, daß die Dehnbarkeit durch @N'alzen, Schmieden u. dg4. nicht beeinträchtigt werden. Dieser Körper weist die bekannte kristallinische Struktur auf, ist also gegen Bruch wenig widerstandsfähig. Er wird nun durch Walzen, Hämmern, Schmie-(len oder Pressen gründlich bearbeitet, wodurch seine kristallinische Struktur in eine faserartige oder sehnige Struktur übergeführt wird. Hierauf unterzieht man den Körper in an sich bekannter Weise eineaii Zementierungsprozeß, führt ihm also Kohlenstoff zu und erhält einen Körper bzw. ein Werkzeug der oben angegebenen Eigenschaften.The method is practiced so that by casting a body devoid of anyone Carbon-containing or is produced with so little carbon that the Extensibility through salting, forging and the like4. not be affected. This Body has the well-known crystalline structure, so there is little resistance to breakage resilient. It is now thorough by rolling, hammering, forging or pressing machined, which turns its crystalline structure into a fibrous or sinewy Structure is transferred. Then the body is subjected to a known per se It does a cementing process, so it adds carbon and sustains one Body or a tool with the properties given above.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung sehr harter, aber dehnbarer und gegen Bruch widerstandsfähiger Werkzeuge aus kohlenstoffhaltigen Metallen, dadurch gekennzeichnet, daß ein Block aus Metall, z. B. Wolfram, Titan, Molybdän, Chrom oder Eisen, ohne Kohlenstoffgehalt bzw. mit so «wenig Kohlenstoffgehalt gegossen wird, daß er dehnbar bleibt, daß hierauf in bekannter Weise seine kristallinische Struktur durch mechanische Bearbeitung, z. B. Walzen, Hämmern, Schmieden oder Pressen, in eine faserartige Struktur verwandelt und schließlich durch Zementieren Kohlenstoff in ihn übergeführt wird.PATENT CLAIM: Process for the production of very hard but ductile ones and break-resistant tools made from carbon-containing metals, thereby characterized in that a block of metal, e.g. B. tungsten, titanium, molybdenum, chromium or iron, cast without carbon content or with so little carbon content becomes that it remains elastic, that then in a known way its crystalline Structure by machining, e.g. B. rolling, hammering, forging or pressing, transformed into a fibrous structure and finally carbon by cementing it is transferred into him.
DE1918335405D 1918-12-07 1918-12-07 Process for the production of very hard, but ductile and break-resistant tools from carbon-containing metals Expired DE335405C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE335405T 1918-12-07

Publications (1)

Publication Number Publication Date
DE335405C true DE335405C (en) 1921-04-01

Family

ID=6219247

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1918335405D Expired DE335405C (en) 1918-12-07 1918-12-07 Process for the production of very hard, but ductile and break-resistant tools from carbon-containing metals

Country Status (5)

Country Link
AT (1) AT100441B (en)
CH (1) CH96341A (en)
DE (1) DE335405C (en)
DK (1) DK32119C (en)
GB (1) GB157774A (en)

Also Published As

Publication number Publication date
AT100441B (en) 1925-07-10
CH96341A (en) 1922-10-02
GB157774A (en) 1922-04-10
DK32119C (en) 1923-08-20

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