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What Are Superabrasives?
Superabrasives make up a special category of bonded abrasives designed for grinding the hardest, most challenging work materials. Because...
2016年12月1日星期四
Consolidation abrasive manufacturing processes are: distribution of materials, mixing, molding, heat treatment, processing and inspection. With the combination of different manufacturing processes are not the same. Ceramic binder abrasive mainly by pressure method, the abrasive and binder according to the proportion of the weight of the formula after weighing, mixed in the mixing machine, into the metal mold, the molding machine in the mill blanks. Blank by drying and then into the kiln roasting, firing temperature is generally about 1300 ℃. When a low-melting-point sintering binder is used, the sintering temperature is lower than 1000 ° C. And then according to the required size and shape of the precise processing, and finally check the product. Resin-bonded abrasives are typically formed on presses at room temperature, and are hot-pressed using heat under pressure. And hardened in the hardening furnace after molding. When the phenolic resin is used as a binder, the curing temperature is 180 to 200C. Rubber-bonded abrasive is mainly used to roll mixing, and roll into thin slices, and then use the punching knife forming; some with loose material, into the metal mold on the internal press molding. After molding, the vulcanization tank is vulcanized, and the temperature is 165-180 DEG C. Metal bonded abrasive manufacturing process has two kinds of powder metallurgy and electroplating method, mainly for super-hard abrasive consolidation abrasive. The powder metallurgy method uses the bronze and so on as the binding agent, after the mixture uses the hot press or under the room temperature condition press molding, then sintering processing. Electroplating to nickel or nickel-cobalt alloy for plating metal, according to electroplating process will be consolidated in the matrix abrasive, made of abrasive. Special varieties of grinding with sintered corundum abrasive and fiber abrasive and so on. Sintered corundum abrasive is alumina powder and the appropriate amount of chromium oxide mixture, forming, at about 1800 ℃ sintering. This abrasive structure is compact, high strength, mainly used for processing watches, meters and other parts. Fiber abrasive is containing or attached to the abrasive fiber yarn (such as nylon yarn) made of raw materials, and its good elasticity, mainly for metal materials and polishing products.
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