DE589374C - Means for polishing, honing and grinding objects of great hardness, especially hard alloys - Google Patents

Means for polishing, honing and grinding objects of great hardness, especially hard alloys

Info

Publication number
DE589374C
DE589374C DES104805D DES0104805D DE589374C DE 589374 C DE589374 C DE 589374C DE S104805 D DES104805 D DE S104805D DE S0104805 D DES0104805 D DE S0104805D DE 589374 C DE589374 C DE 589374C
Authority
DE
Germany
Prior art keywords
polishing
honing
hard alloys
great hardness
grinding
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
DES104805D
Other languages
German (de)
Inventor
Reinhold Reichmann
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens 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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to DES104805D priority Critical patent/DE589374C/en
Application granted granted Critical
Publication of DE589374C publication Critical patent/DE589374C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/14—Anti-slip materials; Abrasives
    • C09K3/1409—Abrasive particles per se
    • C09K3/1418—Abrasive particles per se obtained by division of a mass agglomerated by sintering

Description

Mittel zum Polieren, Abziehen und Schleifen von Gegenständen großer Härte, . insbesondere von Hartlegierungen Zu den härtesten, in größerem Umfang praktisch verwendeten Schleifmitteln gehört das Siliciumcarbid. Man verwendet es insbesondere zum Schleifen der soPenannten Hartlegierungen und Metallcarbide, wie Stellit, Widia o. dgl. Die infolge der großen Härte des Siliciumcarbids gute Schleifwirkung wird aber dadurch beeinträchtigt, daß die Kristalle durch ein tonhaltiges Bindemittel miteinander verbunden sind, dessen Festigkeit im Verhältnis zu der Festigkeit der Kristalle nur gering ist. Bei der Bearbeitung sehr harter Stöffe werden deshalb die Kristalle leicht aus ihrem Gefüge herausgebrochen, wodurch sich nicht nur eine große Abnutzung der Schleifscheiben, sondern auch eine geringe Schleifleistung ergibt.Means for polishing, honing and grinding objects of large size Hardness,. especially of hard alloys Among the hardest, more practical The abrasives used include silicon carbide. It is used in particular for grinding the so-called hard alloys and metal carbides, such as stellite, widia or the like. The abrasive effect due to the high hardness of silicon carbide becomes good but affected by the fact that the crystals are covered by a clay-containing binder are interconnected, its strength in proportion to the strength of the Crystals is only slight. Therefore, when machining very hard materials the crystals easily broken out of their structure, resulting in not just one high wear of the grinding wheels, but also a low grinding performance.

Nach der Erfindung wird deshalb als Polier- und Schleifmittel für Gegenstände großer Härte möglichst reines, bei über i7oo° C gesintertes Berylliumoxyd verwendet.According to the invention is therefore used as a polishing and abrasive for Objects of great hardness as pure as possible beryllium oxide sintered at over 170 ° C used.

Man hat bisher das Berylliumoxyd im wesentlichen nur zur Herstellung feuerfester Tiegel benutzt. Seine Eignung als Polier-und Schleifmittel für Gegenstände großer Härte hat man jedoch bis jetzt nicht erkannt. Besonders vorteilhaft ist die Verwendung des Berylliumoxyds in Form von festen Körpern als Schleifscheiben o. dgl. Dabei können die Berylliumoxydteilchen entweder durch einen Stoff miteinander vereinigt sein, der ebenfalls bei hoher Temperatur gesintert ist, wie z. B. Aluminiumoxyd. Ein noch festeres Gefüge erhält man, wenn man nur die reinen Berylliumoxydteilchen beispielsweise mit Hilfe eines gießfähigen Schlickers oder durch Pressen formt und die Formkörper bei einer Temperatur über 170o° C, z. B. bei igoo bis zoöo° C., sintert. Setzt man das Sintern bei . hoher Temperatur lange genug fort, so tritt durch Verwachsen der Kristalle eine starke Verfestigung des Körpers ein.So far, beryllium oxide has essentially only been used for production refractory crucible used. Its suitability as a polish and abrasive for objects However, great severity has not yet been recognized. That is particularly advantageous Use of beryllium oxide in the form of solid bodies as grinding wheels, etc. Like. The beryllium oxide particles can either through a substance with each other be united, which is also sintered at high temperature, such as. B. alumina. An even more solid structure is obtained if only the pure beryllium oxide particles are used for example with the help of a pourable slip or by pressing and the moldings at a temperature above 170o ° C, for. B. at igoo to zoöo ° C., sinters. If you add sintering. high temperature persists long enough, it occurs through fusing the crystals strongly solidify the body.

Die auf diese Weise erhaltenen Körper können nicht nur zum Schleifen und Abziehen von Hartmetallegierungen und . ähnlichen Stoffen dienen, sondern sie sind auch brauchbar zum Schleifen und Polieren von Gegenständen aus gesinterten Metalloxyden, beispielsweise hochgesintertem Aluminiumoxyd, das bisher wegen seiner großen Härte kaum bearbeitet werden konnte.The bodies obtained in this way can not only be used for grinding and stripping of hard metal alloys and. serve similar substances, but they are also useful for grinding and polishing sintered objects Metal oxides, for example highly sintered aluminum oxide, which so far because of its great hardness could hardly be machined.

Claims (1)

PATENTANSPRUCH: Mittel zum Polieren, Abziehen und Schleifen von Gegenständen großer Härte, insbesondere von Hartlegierungen, dadurch gekennzeichnet, daß es hauptsächlich aus möglichst reinem, bei über i-oo° gesintertem Berylliumoxyd besteht.PATENT CLAIM: Means for polishing, honing and grinding objects great hardness, especially of hard alloys, characterized in that it is mainly consists of beryllium oxide that is as pure as possible and sintered at over i-oo °.
DES104805D 1932-05-31 1932-05-31 Means for polishing, honing and grinding objects of great hardness, especially hard alloys Expired DE589374C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES104805D DE589374C (en) 1932-05-31 1932-05-31 Means for polishing, honing and grinding objects of great hardness, especially hard alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES104805D DE589374C (en) 1932-05-31 1932-05-31 Means for polishing, honing and grinding objects of great hardness, especially hard alloys

Publications (1)

Publication Number Publication Date
DE589374C true DE589374C (en) 1933-12-06

Family

ID=7526117

Family Applications (1)

Application Number Title Priority Date Filing Date
DES104805D Expired DE589374C (en) 1932-05-31 1932-05-31 Means for polishing, honing and grinding objects of great hardness, especially hard alloys

Country Status (1)

Country Link
DE (1) DE589374C (en)

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