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An aluminum-silicon alloy and manufacturing method technology, applied in the manufacture of tools, abrasives, metal processing equipment, etc., can solve the problems of diamond thermal damage, high melting point, etc., reduce the degree of thermal damage, expand the scope of application, improve service life and processing quality Effect
Inactive Publication Date: 2019-09-06
HUAQIAO UNIVERSITY
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Problems solved by technology
In order to solve this problem, some metal binders will add tungsten, a strong carbide-forming element, to form a chemical bond between the diamond and the binder, which can effectively improve the holding force of the diamond. However, the melting point of tungsten is high, and it will Severe thermal damage to diamond
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Embodiment 1
[0019] A method for manufacturing an aluminum-silicon alloy bonded diamond grinding disc, comprising the steps of:
[0020] 1) The diamond powder with a particle size of W40 and the aluminum-silicon alloy bond are fully mixed in a mixer according to the diamond concentration of 100%. The aluminum-silicon alloy bond contains the following components by weight: Si30%, Ti6%, Mg0. 5%, Cu5%, Ga0.5%, Ce0.5%, Sr0.5%, Na0.5%, the balance is Al together with unavoidable impurities;
[0021] 2) After the above mixture is cold-pressed into a mold with the desired shape of the diamond grinding disc segment, it is kept at 150MPa, 750°C for 30 minutes, then at 90MPa, 650°C for 15 minutes, and cooled with the furnace to obtain a diamond grinding disc segment ;
[0022] 3) The sintered diamond grinding disc segment body is mounted on the grinding disc substrate to obtain the rough product of the diamond grinding disc of the present invention, and the diamond grinding disc obtained above is t...
Embodiment 2
[0025] A method for manufacturing an aluminum-silicon alloy bonded diamond grinding disc, comprising the steps of:
[0026] 1) Fully mix the diamond powder with a particle size of W5 and the aluminum-silicon alloy bond in a mixer at a diamond concentration of 75%. The aluminum-silicon alloy bond contains the following components by weight: Si20%, Ti3%, Cu5% , Ce0.5%, Sr0.5%, Na0.5%, the balance is Al together with unavoidable impurities;
[0027] 2) After the above mixture is cold-pressed into a mold with the desired shape of the diamond grinding disc segment, it is kept at 100 MPa and 700 ° C for 60 minutes, then at 50 MPa and 650 ° C for 30 minutes, and cooled with the furnace to obtain a diamond grinding disc segment ;
[0028] 3) The sintered diamond grinding disc segment body is mounted on the grinding disc substrate to obtain the rough product of the diamond grinding disc of the present invention, and the diamond grinding disc obtained above is trimmed with a diamond ro...
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Abstract
The invention discloses an aluminum-silicon alloy binding agent diamond abrasive disc and a manufacture method thereof. An aluminum-silicon alloy binding agent comprises, by weight, 0%-30% of Si, 0.25%-6% of Ti, 0%-0.5% of Mg, 0%-5% of Cu, 0%-0.5% of Ga, 0%-0.5% of Ce, 0%-0.5% of Sr, 0%-0.5% of of Na and the balance Al and inevitable impurities. The aluminum-silicon alloy binding agent and diamondpowder are sufficiently mixed; after the mixture is subjected to cold press molding, vacuum hot pressing sintering is conducted under a certain sintering process, and aluminum-silicon alloy based diamond abrasive disc section blocks are obtained; and then the diamond abrasive disc section blocks obtained through sintering are installed on and connected to an abrasive disc base body, and the diamond abrasive disc is obtained. By means of the aluminum-silicon binding agent adopted for the aluminum-silicon alloy binding agent diamond abrasive disc, low-temperature sintering can be achieved, anddiamond thermal damage is reduced; and meanwhile by introducing the active Ti element, the holding capacity of diamond abrasive particles can be remarkably increased, the wear resistance of the abrasive disc is improved through the aluminum-silicon binding agent and the Ti element together, and the service life of the diamond abrasive disc is prolonged.
Description
technical field [0001] The invention relates to the technical field of manufacturing sintered diamond tools, in particular to an aluminum-silicon alloy bonded diamond grinding disc and a manufacturing method thereof. Background technique [0002] Diamond tools have great advantages in improving the processing efficiency and processing quality of grinding and polishing. As a high-efficiency and precision-processed superhard abrasive tool, diamond grinding discs are ideal tools for grinding hard and brittle materials and cemented carbide. Among them, diamond grinding discs are required to have high grinding efficiency and grinding quality, that is, high processing efficiency, high processing accuracy, low wear ratio and high service life. The currently commonly used diamond grinding disc bonds include resin bonds, metal bonds and vitrified bonds. Resin bonded grinding discs are soft in texture and cannot withstand large stress during processing, and are prone to problems such...
Claims
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Application Information
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