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PDC cutters are made by tungsten carbide substrate and diamond powder under high temperature and high pressure. Following words are some information about leaching knowledge of PDC cutters.
Cobalt is a binder, leached PDC means to separate the Cobalt from the composite layer. This process is normally finished in more than 10 hours under 500 to 600 degree by vacuum furnace. The purpose of leached is to enhance the toughness of the PDC. Normally just oil field PDC adopts this technology, because the working environment of oil field is more complex.
