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AssigneeNone recorded
InventorsViktor A. Lobachev, Vladimir G. Safronov, Faina B. Danilova, Vladimir N. Lvov
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The present invention relates to compositions for the manufacture of abrasive tools which can be most effectively used for the manufacture of tools employed for machining of articles made of sitals, hard alloys and other difficultly machinable materials. This composition contains, as a binding agent, compounds selected from the group of caustic alkalis in combination or separately, the composition components having the following proportions, percent by volume: ______________________________________ abrasive powders 12.5 to 37.5 metal powders 25.0 to 62.5 caustic alkalis 12.5 to 50.0 ______________________________________
In a composition for the manufacture of abrasive tools consisting essentially of abrasive powders, metal powders and a binding agent, wherein the improvement comprises, the binding agent is a solid caustic alkali selected from the group consisting of potassium hydroxide and sodium hydroxide separately or in combination, the components being present in the following proportions, in percent by volume:
In a method for manufacturing an abrasive tool consisting essentially of abrasive powders, metal powders and a binding agent as components, the improvement wherein the binding agent is a solid caustic alkali selected from the group consisting of potassium hydroxide and sodium hydroxide, alone or in combination, and said components are mixed in the following proportions, in percent by volume:
Dependencies are inferred from the claim text.
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Characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties:…
Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon
Tools for grinding, buffing or sharpening
Alloys
Term ended 5 Feb 1999 (estimated)
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The present invention relates to the manufacture of abrasive tools, in particular to a composition for the manufacture of working members of tools from diamond, cubic boron nitride and other superhard materials.
The present invention can be employed in factories manufacturing diamond and abrasive tools and as individual final tools for various industries, more specifically for processing of articles made sitals, hard alloys and other difficulty machinable materials.
Known in the art are a great number of compositions for the manufacture of abrasive tools which compositions contain abrasive and metal powders, and binders as well. However, the use of such tools for machining of sitals has certain disadvantages.
It follows from the Examples given in the Table hereinbelow that incorporation, into the composition containing abrasive and metal powders, components selected from the group of caustic alkalis makes it possible to achieve high machining efficiency at small specific consumption of abrasives (diamonds). It is also possible to reduce temperature of compression in the manufacture of tools which ensures higher durability of molds. No etching effect on molds has been observed on the part of said alkali components, provided that all requirements for the manufacture of tools are fulfilled: dry working premises, application of a graphite lubricant, and the like.
TABLE __________________________________________________________________________ Examples illustrating embodiments of the present invention Compression- Test results molding Electri- Specific Components conditions Hardness cal con- consump- of the com- Temp- of tools, ductivity tion of position erature, Pressure, HRB of tools Machined Capacity, diamonds, Grinding vol. % .degree. C. kg/cm.sup.2 units m/ohm . mm.sup.2 material g/min mg/g type __________________________________________________________________________ 1 2 3 4 5 6 7 8 9 __________________________________________________________________________ Diamond 25 330- 800- Metal-ce- 350 1000 103 5.5 ramic hard 2.8 0.15 Electrochemical Copper 50 alloy Alkali 25 Sital 2.0 0.10 Conventional Diamond 25 280- 800- Metal-ce- Copper 62.5 300.C 1000 98 4.9 ramic hard 2.6 0.13 Electrochemical alloy Eutectic of alkalis NaOH--KOH 0.42:0.58 respecti- vely __________________________________________________________________________ *1 2 3 4 5 6 7 8 9 __________________________________________________________________________ Diamond 25 Metal-ce- Copper 25 1.3 ramic hard 2.0 0.4 Conventional Mixture of 300- 800- alloy NaOH & KOH 50 330 1000 100 0.42:0.58 respective- ly Diamond 12.5 450- 1000- 105 -- Marble -- -- Conventional Iron 57.5 550 1200 Alkali KOH 30 Diamond 20 Metal-cera- Silicon mic hard carbide 17.5 alloy in 330- 800- combination 2.0 0.5 Electrochemical 350 1000 105 2.6 with steel Powder of Metal-cera- copper-tin mic hard alloy 50 alloy 3.2 0.4 Conventional NaOH Sital 2.4 0.15 Conventional alkali 12.5 __________________________________________________________________________