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The success enjoyed by Carbide Blast Joints, Inc. is matched only by the science, intricacy, and dedication that goes into the process of manufacturing the protective Carbide rings.  This manufacturing process ensures a Carbide Blast Joint will last 100 times longer than any conventional blast joint in the field.

     The basic ingredients of cemented carbide are tungsten carbide (WC) and cobalt powders (Co).  Tungsten carbide (WC) is combined with the exact amount of cobalt (Co) needed to produce the right grade of cemented carbide.  After a second mixing procedure, a wax lubricant is added to give the powder a “slippery” texture needed to help compress the powder into the desired shape.  A measured amount of powder is then compressed in a carbide die designed to form a ring shape.  Fifteen (15) to thirty (30) tons per square inch of pressure forms the powder into rings.  The rings are pre-sintered in an atmosphere-controlled furnace. Pre-sintering de-waxes the rings, and allows them to be machined, or preformed into specific shapes.

     The rings are now subjected to the final sinter in an atmosphere controlled furnace or vacuum sintering furnace at a temperature of 2500-2700 degrees Fahrenheit to achieve the proper hardness as determined on the Rockwell “A” hardness scale

 

      The expertise in manufacturing our carbide rings is fully realized in the durability of the finished product.  Carbide Blast Joints have been run by both independent testing laboratories and by our customers.  In an independent laboratory test to compare the resistance of various blast joint designs to high pressure water and sand, the Carbide Blast Joint proved many times superior.  Sample construction, and results are shown in Table 1.

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