Gas atomization nozzle for preparing superfine metal powder
A gas atomization nozzle and metal powder technology, applied in the field of atomization nozzles, can solve the problems of unfavorable atomization efficiency, reduced size of atomization nozzle, coarse powder particle size, etc. small effect
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[0023] Example 1:
[0024] use figure 1 The nozzle structure shown, the maximum operating pressure of the nozzle is 3.0MPa, and the gas flow rate is 6Nm 3 / min (nitrogen), the cone angle of the upper cone of the nozzle is 65°, the cone angle of the lower inner cone is 50°, the outer diameter of the upper nozzle outlet is 10mm, the center through hole is 3.5mm, and the lower nozzle The air outlet end is 4.5mm. The upper nozzle is made of boron nitride ceramic. A Fe-5.4wt%Si-9.6wt%Al iron alloy was used as the atomization object for powder atomization test. The test alloy was 25kg, the atomization temperature was 1500°C, and the atomization pressure was 3.0MPa. After atomization, the powder is measured with a standard analytical sieve. The proportion of powder with a particle size of less than 150μm (-100 mesh) in the atomized powder is 96.3%, and the proportion of powder with a particle size of less than 45μm (-320 mesh) is 76.0% , The proportion of powder smaller than 23μm (-6...
Example Embodiment
[0025] Example 2:
[0026] use figure 1 The nozzle structure shown, the maximum operating pressure of the nozzle is 3.0MPa, and the gas flow rate is 5Nm 3 / min (nitrogen), the cone angle of the upper cone of the nozzle is 65°, the cone angle of the lower inner cone is 50°, the outer diameter of the upper nozzle outlet is 8mm, the center through hole is 3.0mm, and the lower nozzle The air outlet end is 4.5mm. The upper nozzle is made of boron nitride ceramic. The powder atomization test was carried out with Ni-14wt%Cr-10wt%P alloy as the atomization object. The test alloy was 20kg, the atomization temperature was 1250°C, and the atomization pressure was 2.5MPa. After atomization, the powder is measured with a standard analytical sieve. The proportion of powder with a particle size of less than 75μm (-200 mesh) in the atomized powder is 85%, and the proportion of powder with a particle size of less than 45μm (-320 mesh) is 74.8% , The proportion of powder smaller than 23μm (-600...
Example Embodiment
[0027] Example 3:
[0028] use figure 1 The nozzle structure shown, the maximum operating pressure of the nozzle is 3.0MPa, and the gas flow rate is 4Nm 3 / min (nitrogen), the cone angle of the upper frustum of the nozzle is 55°, the cone angle of the lower inner frustum is 40°, the outer diameter of the upper nozzle outlet is 8mm, and the center through hole is 2.5mm. The air outlet end is 4.5mm. The upper nozzle is made of boron nitride ceramic. The powder atomization test was conducted with pure aluminum as the atomization object. The test alloy was 10kg, the atomization temperature was 800°C, and the atomization pressure was 2.5MPa. After atomization, the powder is measured with a standard analytical sieve. The proportion of powder with a particle size of less than 150μm (-100 mesh) in the atomized powder is 95.5%, and the proportion of powder with a particle size of less than 45μm (-320 mesh) is 70.1% , The proportion of powder smaller than 23μm (-600 mesh) is 52.4%, and ...
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