Novel aluminum nitride dispersion strengthening powder metallurgical aluminum high-speed steel and preparation method thereof
A technology of powder metallurgy and dispersion strengthening, which is applied in the field of near-net shape technology, can solve problems such as refractory melting, atomization, and deterioration of material toughness, achieve fine structure, improve wear resistance and oxidation resistance, and facilitate development and trial use Effect
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Embodiment 1
[0031] 1) 6.39wt.% WC powder with a particle size of 0.05-10 microns and an oxygen content less than 0.1%, 5.31wt.% Mo 2 C powder, 4.62wt.%Cr 3 C 2 powder, 3.71wt.% VC powder, 8.0wt.% Co powder, 0.05wt.% AlN powder, 1.21wt.% carbon powder and 70.71wt.% carbonyl iron powder are mixed and wet milled in a drum mill, and the ball milling medium is Dehydrated alcohol, cemented carbide balls are grinding balls, the ball-to-material ratio is 4:1, and the ball milling time is 24 hours to prepare the powder mixture slurry;
[0032] 2) Stir and dry the mixed powder slurry obtained in step 1 in a stirring dryer at a temperature of 75°C until the liquid is completely evaporated, then put the powder into a sieve granulator, add 1% stearic acid and an appropriate amount of alcohol for drying Sieve granulation;
[0033] 3) Press the mixed powder under an automatic press at 300Mpa, hold the pressure for 30s, then carry out hydrogen degreasing, deoxygenation and pre-calcination, and then ca...
Embodiment 2
[0037] 1) 10.66wt.% WC powder with a particle size of 0.05-10 microns and an oxygen content of less than 0.1%, 5.31wt.% Mo 2 C powder, 3.46wt.%Cr 3 C 2 powder, 11.74wt.% VC powder, 9.0wt.% Co powder, 0.25wt.% AlN powder, 3.2wt.% carbon powder and 56.23wt.% carbonyl iron powder are mixed and wet milled in a drum mill, and the ball milling medium is Dehydrated alcohol, cemented carbide balls are grinding balls, the ball-to-material ratio is 3:1, and the ball milling time is 26 hours to prepare the powder mixture slurry;
[0038] 2) Stir and dry the mixed powder slurry obtained in step 1 in a stirring dryer at a temperature of 80°C until the liquid is completely evaporated, then put the powder into a sieve granulator, add 1% stearic acid and an appropriate amount of alcohol for drying Sieve granulation;
[0039] 3) Press the mixed powder under the automatic press at 280Mpa, hold the pressure for 30s, then carry out hydrogen degreasing, deoxidation and pre-calcination, and then...
Embodiment 3
[0043] Present embodiment takes following technical scheme:
[0044] 1) 2.13wt.% WC powder with particle size of 0.05-10 microns and oxygen content less than 0.1%, 3.19wt.% Mo 2 C powder, 9.23wt.%Cr 3 C 2 Powder, 6.18wt.% VC powder, 2.0wt.% Co powder, 5.0wt.% AlN powder, 0.8wt.% carbon powder and 71.47wt.% carbonyl iron powder are wet milled and mixed in a drum mill, and the ball milling medium is Dehydrated alcohol, cemented carbide balls are grinding balls, the ball-to-material ratio is 2:1, and the ball milling time is 27 hours to prepare the powder mixture slurry;
[0045] 2) Stir and dry the mixed powder slurry obtained in step 1 in a stirring dryer at a temperature of 75°C until the liquid is completely evaporated, then add 1% stearic acid and an appropriate amount of alcohol for sieving and granulation;
[0046] 3) Press the mixed powder under an automatic press at 400Mpa, hold the pressure for 30s, then carry out hydrogen degreasing, deoxidation and pre-calcination,...
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