A method for preparing high-strength and toughness cemented carbide with pre-alloyed powder
A technology of cemented carbide and pre-alloyed powder, which is applied in the field of powder metallurgy to prepare cemented carbide, which can solve the problems of affecting the performance of cemented carbide, high oxygen content of Al powder, easy to increase oxygen content, etc., and achieve stable product quality and uniform distribution , Good effect of process controllability
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Embodiment 1
[0020] According to Co98.49wt.%, Ni1.31wt.%, Al0.4wt.%, prepare electrolytic cobalt, electrolytic nickel and electrolytic aluminum as raw materials, put the raw materials into the smelting crucible of gas atomization powder making equipment, first put the whole atomization system Vacuumize the inside to remove the air, then pass in the inert gas nitrogen or argon protection, heat to 1660-1700 ℃ and start to pass high-pressure nitrogen or argon into the nozzle for atomization, after atomization, it will be classified by air flow, and the powder ≤ 15 microns will be selected , The atomization process strictly controls the purity of raw materials to reach more than 99.9wt.%, and cleans the dust and stains outside. After the laser particle size test, the average particle size of the powder is 8.7 microns, and the oxygen content is 0.26%.
[0021] Choose WC powder with an average particle size of 11.2 microns, put it into a ball mill according to WC80wt.%, pre-alloyed powder 20wt.%...
Embodiment 2
[0023]According to Co58.45wt.%, Ni36.05wt.%, Al5.7wt.%, prepare electrolytic cobalt, electrolytic nickel and electrolytic aluminum as raw materials, put the raw materials into the melting crucible of the gas atomization powder making equipment, first put the whole atomization system Vacuumize the inside to remove the air, then pass in the inert gas nitrogen or argon protection, heat to 1660-1700 ℃ and start to pass high-pressure nitrogen or argon into the nozzle for atomization, after atomization, it will be classified by air flow, and the powder ≤ 15 microns will be selected , The atomization process strictly controls the purity of raw materials to reach more than 99.9wt.%, and cleans the dust and stains outside. After the laser particle size test, the average particle size of the powder is 7.9 microns, and the oxygen content is 0.46%.
[0024] Choose WC powder with an average particle size of 11.2 microns, put it into a ball mill according to WC80wt.%, pre-alloyed powder 20w...
Embodiment 3
[0026] According to Co81.11wt.%, Ni16.39wt.%, Al2.7wt.%, prepare electrolytic cobalt, electrolytic nickel and electrolytic aluminum as raw materials, put the raw materials into the smelting crucible of gas atomization powder making equipment, first put the whole atomization system Vacuumize the inside to remove the air, then pass in the inert gas nitrogen or argon protection, heat to 1660-1700 ℃ and start to pass high-pressure nitrogen or argon into the nozzle for atomization, after atomization, it will be classified by air flow, and the powder ≤ 15 microns will be selected , The atomization process strictly controls the purity of raw materials to reach more than 99.9wt.%, and cleans the dust and stains outside. After the laser particle size test, the average particle size of the powder is 8.3 microns, and the oxygen content is 0.34%.
[0027] Choose WC powder with an average particle size of 11.2 microns, put it into a ball mill according to WC80wt.%, pre-alloyed powder 20wt....
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