DE687397C - - Google Patents

Info

Publication number
DE687397C
DE687397C DE1937P0075425 DEP0075425D DE687397C DE 687397 C DE687397 C DE 687397C DE 1937P0075425 DE1937P0075425 DE 1937P0075425 DE P0075425 D DEP0075425 D DE P0075425D DE 687397 C DE687397 C DE 687397C
Authority
DE
Germany
Prior art keywords
additive
iron
still contains
amount
softer
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
DE1937P0075425
Other languages
German (de)
Inventor
Dr Walther Dawihl
Karl Schroeter
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.)
Krupp Stahl AG
Original Assignee
Krupp Stahl AG
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 Krupp Stahl AG filed Critical Krupp Stahl AG
Priority to DE1937P0075425 priority Critical patent/DE687397C/de
Application granted granted Critical
Publication of DE687397C publication Critical patent/DE687397C/de
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
    • B24D3/08—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for close-grained structure, e.g. using metal with low melting point

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Description

Es ist bereits ein Verfahren zur Herstellung von Schneidwerkzeugen für Glas u. dgl. bekannt, bei welchem ein Preßkörper aus fein verteiltem kristallinischem Aluminiumoxyd und einem weicheren und dehnbaren Zusatzstaff bei einer die Schmelztemperatur des Zusatzstoffes übersteigenden Temperatur gesintert wird. Der Zusatzstoff kann hierbei der Ausgangsmischung in metallischer oder auchA method for manufacturing cutting tools for glass and the like is already known, in which a compact made of finely divided crystalline aluminum oxide and a softer and more flexible additional material sintered at a temperature exceeding the melting temperature of the additive will. The additive can be the starting mixture in metallic or

ίο oxydischer Form beigegeben werden. Als besonders vorteilhaft hatte sich bisher ein Zusatz von ι ο 0/0 Eisenoxyd, entsprechend etwa 60/0 metallischem Eisen in dem fertigen Schneidwerkzeug, erwiesen.ίο be added in oxidic form. As special So far, an addition of ι ο 0/0 iron oxide, corresponding to about 60/0 metallic iron in the finished cutting tool.

Erfindungsgemäß wurde festgestellt, daß derartige Werkzeuge nicht nur zum Schneiden von Glas ο. dgl., sondern sogar auch zum Drehen, Bohren, Hobeln und Fräsen, von Stahl, Kohle und Isolierstoffen aller Art einschließlich Porzellan geeignet sind, sofern die Menge des Zusatzstoffes erheblich gesteigert wird, und zwar derart, daß im fertigen Werkzeugkörper noch mindestens 200/0, jedoch nicht mehr als 40 0/0 des Zusatzmetalls enthalten sind. Wird bei der Herstellung des Werkzeuges von Eisenoxyd als Zusatzstoff ausgegangen, so muß mit Rücksicht auf den beim Sintern des Pulverpreßkörpers eintretenden Sauerstoffverlust die Menge des Zusatzstoffes entsprechend erhöht werden, also etwa 30 bis 60 0/0 betragen.According to the invention it was found that such tools are not only used for cutting of glass ο. Like., But even for turning, drilling, planing and milling, of Steel, coal and all kinds of insulating materials including porcelain are suitable, provided that the Amount of the additive is increased significantly, in such a way that in the finished tool body still contain at least 200/0, but not more than 40 0/0 of the additional metal are. If iron oxide is used as an additive in the manufacture of the tool, this must be taken into account oxygen loss occurring during sintering of the powder compact the amount of the additive are increased accordingly, i.e. about 30 to 60 0/0.

Zur Erhöhung der Standzeit des neuen, vornehmlich für Abdrehzwecke geeigneten Werkzeuges hat es sich als zweckmäßig erwiesen, von dem als weicheren Zusatzstoff verwendeten Eisen noch kleine Mengen eines oder mehrerer die Verschleißfestigkeit des Eisens- erhöhender Metalle, wie z.B. Chrom,To increase the service life of the new one, primarily suitable for calibration purposes Tool it has proven to be useful from the softer additive Used iron still small amounts of one or more of the wear resistance of the Iron-increasing metals such as chromium,

Vanadium, Titan, Kobalt oder Nickel, zugesetzt werden. Die Menge der letzterwähnten Metalle kann hierbei zwischen 0,1 und 50/0 betragen.Vanadium, titanium, cobalt or nickel, can be added. The amount of the last-mentioned metals can be between 0.1 and 50/0.

Claims (1)

Patentansprüche:Patent claims: i. Verfahren zur Herstellung von Schneidwerkzeugen, z, B. zum Drehen und Fräsen, durch Sintern eines Gemisches von fein verteiltem kristallinischem Aluminiumoxyd und einem weicheren, dehnbaren metallischen oder oxydischen Zusatzstoff bei einer die Schmelztemperatur des Zusatzstoffes übersteigenden Temperatur, dadurch gekennzeichnet, daß der Zusatzstoff in einer solchen Menge verwendet wird, daß im fertigen gesinterten Schneidwerk-..-iZjsug noch mindestens 20 0/0 und höchstens φ,\φ?'ο/ο des Zusatzmetalls enthalten sind.
"1 *■v 2. Verfahren nach Anspruch 1 unter Verwendung von Eisen als Zusatzstoff, dadurch gekennzeichnet, daß dem Eisen noch kleine Mengen von 0,1 bis 5 0/0 eines oder mehrerer die Verschleißfestigkeit des Eisens erhöhender Metalle, wie z. B. Chrom, Vanadium, Titan, Kobalt oder Nickel, zugefügt werden.i. Process for the production of cutting tools, e.g. for turning and milling, by sintering a mixture of finely divided crystalline aluminum oxide and a softer, ductile metallic or oxidic additive at a temperature exceeding the melting temperature of the additive, characterized in that the additive is in a such an amount is used that the finished sintered cutting unit -..- iZjsug still contains at least 20 0/0 and at most φ, \ φ? 'ο / ο of the additional metal.
"1 * ■ v 2. The method according to claim 1 using iron as an additive, characterized in that the iron still contains small amounts of 0.1 to 5% of one or more metals which increase the wear resistance of the iron, such as Chromium, vanadium, titanium, cobalt or nickel can be added.
DE1937P0075425 1937-06-22 1937-06-22 Expired DE687397C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1937P0075425 DE687397C (en) 1937-06-22 1937-06-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1937P0075425 DE687397C (en) 1937-06-22 1937-06-22

Publications (1)

Publication Number Publication Date
DE687397C true DE687397C (en) 1940-01-29

Family

ID=7392759

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1937P0075425 Expired DE687397C (en) 1937-06-22 1937-06-22

Country Status (1)

Country Link
DE (1) DE687397C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748036C (en) * 1940-11-24 1944-10-25 Sintered hard material
DE922278C (en) * 1943-06-05 1955-01-13 Heinrich Dipl-Ing Spodig Process for the production of hard, wear-resistant bodies
DE935178C (en) * 1940-06-30 1955-11-10 Franz Dr Phil Dr Mont H Skaupy Hard body
DE975130C (en) * 1941-09-25 1961-08-24 Deutsche Edelstahlwerke Ag Use of an oxide-metal composite material for the production of objects with high durability
GR880100230A (en) * 1987-04-10 1989-01-31 Friedl & C0 Diamanttechnische Metal incorporated bodies for grinding and cutting

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE935178C (en) * 1940-06-30 1955-11-10 Franz Dr Phil Dr Mont H Skaupy Hard body
DE748036C (en) * 1940-11-24 1944-10-25 Sintered hard material
DE975130C (en) * 1941-09-25 1961-08-24 Deutsche Edelstahlwerke Ag Use of an oxide-metal composite material for the production of objects with high durability
DE922278C (en) * 1943-06-05 1955-01-13 Heinrich Dipl-Ing Spodig Process for the production of hard, wear-resistant bodies
GR880100230A (en) * 1987-04-10 1989-01-31 Friedl & C0 Diamanttechnische Metal incorporated bodies for grinding and cutting

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