Process for the production of high apparent density water...

Details Process for the production of high apparent density water... Process for the production of high apparent density water...

B - Operations, Transporting

22

F

241/128, 75/155

B22F 9/00 (2006.01) B22F 9/04 (2006.01)

Patent

CA 1041324

ABSTRACT OF THE DISCLOSURE The apparent density of molding-grade, water atomized steel powder can be significantly increased by employing the following prescribed treatment. Coarse particles are removed in order that at least 80% of the initial powders are finer than ?? mesh. The size distribution of the powders is then determined. The powders are then annealed to both reduce the carbon and oxygen contents and soften the particles. The annealed and agglomerated particles are then ground in a disk mill at specified speeds and gap spacings, depending on the size distribution of the initial powders. Apparent densities in excess of 3.2 may be achieved by (a) employing powders with a coarser particle size distribution, (b) increasing the rotational speed of the disks and (c) decreasing the mill gap.

207148

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