Consolidation and fabrication of WC-Co for friction stir welding(FSW) tool

摘要

The invention steel, refractory materials, such as Thai tyanyum or aluminum and magnesium-steel, titanium, etc. used in tools for friction stir welding of dissimilar materials, a high density in a short time by using a single fixed-discharge plasma sintering process, high strength, high toughness and high wear resistance of friction stir welding having tulyong tungsten carbide-cobalt relates to a method for producing the sintered body . Friction stir welding according to the present invention tulyong tungsten carbide-cobalt sintered body production method with the sealing step, sealing the high-strength stainless steel to cemented carbide balls and alcohol as a mixture of the mixed powder by mixing a tungsten carbide powder and cobalt powder sealed in a high-strength stainless steel vessel and a grinding step for grinding the mixture in the container by inserting the high-energy ball milling apparatus, mixing the pulverized powder mixed in order to remove the alcohol contained in the pulverized powder, and dried in a vacuum drying oven, grinding the dried mixture that the filling step of filling a mold made of graphite material powder, and a mounting step for mounting in the chamber of the pulverized mixture powder is a discharge plasma sintering device, the filled mold, the interior of the chamber and evacuation steps of evacuation, while maintaining constant the pressure of the mixture in the mold was heated to the milled powder mixture and forming the powder pulverized step of shaping the product, this mixture was heated powdered tungsten carbide in the mold and then made in the molding step - to cobalt sintered and the pressing pressure kept down to the lowest pressure (10MPa) and a cooling step for cooling the interior of the chamber. ;