Tremendously aggressive grain cemented carbide

Based on the grain size grading standard Sandvik, coarse grained cemented carbide grain sizing is 3.5 ~ 4.9 microns, super coarse grain cemented carbide grain dimensions are 5.0 ~ 7.9 microns.(Indexable Carbide Inserts  Turning Inserts  China Carbide Inserts  )

Oil drilling, coal cutter tooth, tooth, stamping die, cold pavement milling planer roll as well as other popular in the coarse grain and coarse grain cemented carbide. Low cobalt coarse grain and high cobalt fine grain cemented carbide have grown to be the growth direction of cemented carbide. Low cobalt coarse grain of alloy design principle is: the WC grain size, specific surface is small, thickening of cobalt from the alloy layer, in order to enhance the impact toughness of alloy. The cobalt content from the alloy decreases, the rise of WC content in the alloy, help the alloy wear resistance. Low cobalt coarse grain alloy combination helps make the alloy good toughness, high abrasion resistance.

Grain sized coarse grained cemented carbide size is dependent upon how big WC powder grain size.(Carbide Inserts Manufacturers)

Aluminothermy is really a creation of coarse grain WC (tungsten carbide) special methods. It's going to tungsten concentration, rolled steel scale (Fe3O4), aluminum powder, CaC2 along with other ingredients, add a tiny amount of potassium perchlorate do lead content. Material exothermic reaction, temperature approximately 2500 ℃ ~ 3000 ℃, following your reaction with furnace cooling. Products, like the upper for potassium calcium aluminate slag for lower metal iron containing WC. About iron contains WC65 %, iron after crushing, cleaning with hot sulfuric acid and hydrochloric acid solution dissolve to iron, single crystal WC particles.

Preparation of coarse grained cemented carbide, wish to lessen the efficiency of ball mill and broken as far as possible, enhance the mixture, in an attempt to prevent the WC grain is just too broken. In practical production increase grinding ball diameter, cut the ball material ratio, shortening the time of ball mill and also other solutions to reduce the efficiency of ball mill and broken, enhance the efficiency of hybrid. Microstructure of coarse grained cemented carbide WC average grain size 7 microns the heavy rain.