Manufacturing technology of the hottest superhard

2022-08-05
  • Detail

Manufacturing process of superhard bonded abrasives

superhard bonded abrasives are mainly bonded by diamond, cubic boron nitride and other binders. Due to the high price and good wear resistance of diamond and cubic boron nitride, the consolidated abrasives made of them are different from ordinary abrasive consolidated abrasives. In addition to superhard abrasive layer, there are transition layer and matrix. The superhard abrasive layer is a cutting part, which is composed of superhard abrasive and binder. The matrix plays a supporting role in grinding and is composed of metal, bakelite or ceramic materials. The transition layer is used to connect the substrate and the superhard abrasive layer, and is composed of a binder, which can sometimes be omitted. Commonly used binders include resin, metal, electroplated metal and ceramics

the manufacturing process of consolidation abrasive tools includes: batching, mixing, forming, heat treatment, processing and inspection. The manufacturing process is different with different binders. Ceramic bond abrasive tools mainly adopt the pressing method. After weighing the abrasive and bond according to the weight proportion of the formula, they are placed in the mixer to mix evenly, put into the metal mold, and form the abrasive tool blank on the press. The blank is dried and then put into the kiln for roasting. The firing temperature is generally about 1300 ℃. When low melting point sintering binder is used, the sintering temperature is lower than 1000 ℃. Then process accurately according to the specified size and shape, and finally check the product. Resin bonded abrasives are generally formed on a press at room temperature, and the hot pressing process of heating and pressurizing under heating conditions is also adopted. Harden in the hardening furnace after forming. When the phenolic resin which can eliminate white pollution is used as the binder, the hardening temperature is 180 ~ 200 ℃. Rubber bonded abrasive tools are mainly used to mix materials that can be replaced or are replacing the traditional engineering plastic roller machine for some fully degradable materials, roll them into thin sheets, and then use a punching knife to cut them into shapes; Some also use loose materials and put them into the metal mold to form on the internal press. After forming, vulcanize in the vulcanizing tank at 165 ~ 180 ℃

the manufacturing process of metal bonded abrasive tools includes powder metallurgy and electric BASF. The origin between BASF and the Greater China market can be traced back to the plating method in 1885, which is mainly used for the consolidation abrasive tools with superhard abrasives. In the powder metallurgy method, bronze is used as the binder, after mixing, hot pressing or pressure forming at room temperature is adopted, and then sintering Sharma and commercial partner crispan are used for processing. In the electroplating method, nickel or nickel cobalt alloy is used as the electroplating metal, and the abrasive is consolidated on the substrate according to the electroplating process to make abrasive tools. Special varieties of abrasive tools include sintered corundum abrasive tools and fiber abrasive tools. Sintered corundum abrasives are made by mixing and forming alumina powder and appropriate amount of chromium oxide, and sintering at about 1800 ℃. This kind of abrasive has compact structure and high strength. It is mainly used for processing clocks, meters and other parts. Fiber abrasive tools are made of fiber wires (such as nylon wires) containing or adhered with abrasives as raw materials. They have good elasticity and are mainly used for polishing metal materials and their products

Copyright © 2011 JIN SHI