DE1039912B - Process for the production of abrasive bodies using boron carbide - Google Patents

Process for the production of abrasive bodies using boron carbide

Info

Publication number
DE1039912B
DE1039912B DEE12459A DEE0012459A DE1039912B DE 1039912 B DE1039912 B DE 1039912B DE E12459 A DEE12459 A DE E12459A DE E0012459 A DEE0012459 A DE E0012459A DE 1039912 B DE1039912 B DE 1039912B
Authority
DE
Germany
Prior art keywords
boron carbide
production
metal oxides
oxide
melting temperature
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
Application number
DEE12459A
Other languages
German (de)
Inventor
Dr Karl Adlassnig
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.)
Elektroschmelzwerk Kempten GmbH
Original Assignee
Elektroschmelzwerk Kempten 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 Elektroschmelzwerk Kempten GmbH filed Critical Elektroschmelzwerk Kempten GmbH
Priority to DEE12459A priority Critical patent/DE1039912B/en
Publication of DE1039912B publication Critical patent/DE1039912B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/1315—Non-ceramic binders
    • 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
    • B24D3/008—Abrasive bodies without external bonding agent
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

Verfahren zur Herstellung von Schleifkörpern unter Verwendung von Borcarbid Es sind Schleifkörper, z. B. Schleifscheiben u. dgl., bekannt, die aus kleinstückigem Borcarbid und organischen Bindemitteln, z. B. Kunststoffen, oder anorganischen, z. B. Silicaten, bestehen.Process for the production of abrasive articles using Boron carbide There are abrasive bodies, e.g. B. grinding wheels and the like., Known from small pieces of boron carbide and organic binders, e.g. B. plastics, or inorganic, e.g. B. silicates exist.

Es wurde gefunden, daß Schleifkörper aus Borcarbid hergestellt werden können, die einen höheren Gebrauchswert besitzen, z. B. betreff Härte, Abnutzung, Schleifwirkung usw., wenn man ein Gemisch aus Borcarbid-Körnungen und einer Mischung aus Metalloxyden auf die Sinter- bzw. Schmelztemperatur des Borcarbids erhitzt und dabei mindestens eines dieser Metalloxyde über dieser Temperatur schmilzt. Die Korngröße des Borcarbids richtet sich nach dem Verwendungszweck des Schleifkörpers. Im allgemeinen verwendet man eine Korngröße von 0,02 bis 0,5 mm. Für die Mischungen aus Metalloxyden kommen insbesondere in Betracht: Magnesiumoxyd, Kobaltoxyd, Aluminiumoxyd, Chromoxyd, Zirkoniumoxyd, Thoriumoxyd u. dgl. Zweckmäßig geht man von Mischungen aus, die außer Borcarbid-Körnungen Metalloxyde enthalten, von denen mindestens die Hälfte über der Sinter- bzw. Schmelztemperatur des Borcarbids schmelzen. Als Metalloxyd verwendet man zweckmäßig hauptsächlich Magnesiumoxyd.It has been found that abrasive articles are made from boron carbide can that have a higher utility value, e.g. B. regarding hardness, wear and tear, Abrasive effect etc. when using a mixture of boron carbide grains and a mixture from metal oxides heated to the sintering or melting temperature of the boron carbide and at least one of these metal oxides melts above this temperature. The grain size of the boron carbide depends on the intended use of the grinding wheel. In general a grain size of 0.02 to 0.5 mm is used. For mixtures of metal oxides in particular come into consideration: magnesium oxide, cobalt oxide, aluminum oxide, chromium oxide, Zirconium oxide, thorium oxide and the like. Appropriately, one starts from mixtures that except Boron carbide grits contain metal oxides, at least half of which are about the sintering or melting temperature of the boron carbide melt. Used as a metal oxide it is advisable to use mainly magnesium oxide.

Die Mischungen, welche die Bindung des Borcarbids bewirken, können aus zwei Metalloxyden bestehen, von denen das eine unter, das andere über der angegebenen Temperatur schmilzt; es können aber auch Mischungen verwendet werden, die aus mehreren Metalloxyden bestehen. Die Erhitzung der Mischungen aus Borcarbid und Metalloxyden kann zur Erzielung einer höheren Festigkeit unter Druck erfolgen. Bei Verwendung mancher Metalloxyde, z. B. Magnesiumoxyd, entstehen poröse Schleifkörper, was zur Erhöhung der Schleifwirkung meist erwünscht ist.The mixtures which effect the binding of the boron carbide can consist of two metal oxides, one below and the other above the specified Temperature melts; but it can also be used mixtures of several Metal oxides exist. The heating of the mixtures of boron carbide and metal oxides can be done under pressure to achieve greater strength. Using some metal oxides, e.g. B. magnesium oxide, porous abrasive bodies are created, which leads to Increasing the grinding effect is usually desirable.

Beispiel Ein Gemisch aus 80 Gewichtsprozent Borcarbid mit einer Korngröße von 0,06 bis 0,10 mm, 13 Gewichtsprozent Magnesiumoxyd und 7 Gewichtsprozent Chromoxyd wird unter Druck gesintert. Man erhält einen porösen, äußerst harten Schleifkörper.Example A mixture of 80 percent by weight boron carbide with a grain size from 0.06 to 0.10 mm, 13 weight percent magnesium oxide and 7 weight percent chromium oxide is sintered under pressure. A porous, extremely hard abrasive body is obtained.

Man kann auch von folgender Mischung ausgehen 75 Gewichtsprozent Borcarbid mit einer Korngröße von 0,03 bis 0,05 mm, 17 Gewichtsprozent Zirkoniumoxyd, 5 Gewichtsprozent Magnesiumoxyd, 3 Gewichtsprozent Kobaltoxyd.You can also start from the following mixture: 75 percent by weight boron carbide with a grain size of 0.03 to 0.05 mm, 17 percent by weight of zirconium oxide, 5 percent by weight Magnesium oxide, 3 percent by weight cobalt oxide.

Claims (3)

PATENTANSPRÜCHE: 1. Verfahren zur Herstellung von Schleifkörpern unter Verwendung von Borcarbid, dadurch gekennzeichnet, daß ein Gemisch aus Borcarbid-Körnungen und einer Mischung aus solchen Metalloxyden, von denen mindestens eines über der Schmelztemperatur des Borcarbids schmilzt, auf die Sinter- bzw. Schmelztemperatur des Borcarbids erhitzt wird. PATENT CLAIMS: 1. Process for the production of grinding wheels under Use of boron carbide, characterized in that a mixture of boron carbide grains and a mixture of such metal oxides, at least one of which is above the Melting temperature of the boron carbide melts to the sintering or melting temperature of the boron carbide is heated. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß mindestens die Hälfte der Metalloxyde über der Sinter- bzw. Schmelztemperatur des Borcarbids schmelzen. 2. The method according to claim 1, characterized in that that at least half of the metal oxides are above the sintering or melting temperature of the boron carbide melt. 3. Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daß als Metalloxyd hauptsächlich Magnesiumoxyd verwendet wird. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 738 490.3. The method according to claim 1 and 2, characterized in that that magnesium oxide is mainly used as the metal oxide. Considered Publications: German Patent No. 738 490.
DEE12459A 1956-06-01 1956-06-01 Process for the production of abrasive bodies using boron carbide Pending DE1039912B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE12459A DE1039912B (en) 1956-06-01 1956-06-01 Process for the production of abrasive bodies using boron carbide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE12459A DE1039912B (en) 1956-06-01 1956-06-01 Process for the production of abrasive bodies using boron carbide

Publications (1)

Publication Number Publication Date
DE1039912B true DE1039912B (en) 1958-09-25

Family

ID=7068330

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE12459A Pending DE1039912B (en) 1956-06-01 1956-06-01 Process for the production of abrasive bodies using boron carbide

Country Status (1)

Country Link
DE (1) DE1039912B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE738490C (en) * 1951-04-10 1943-08-18 Norton Ges M B H Deutsche Process for the production of abrasive bodies

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE738490C (en) * 1951-04-10 1943-08-18 Norton Ges M B H Deutsche Process for the production of abrasive bodies

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