Powder metallurgical method
First Claim
1. A powder metallurgical method for producing metal bodies, wherein a particle size distribution closely approximating the so-called Fuller curve for maximum density packing of spherical particles is chosen of at least two powder fractions with different mean particle size relationship vis-a-vis each fraction, said powder being a spherical powder of magnetizable material produced by inert gas atomization, the powder is then magnetized and introduced into a container or the powder is magnetized after introduction in said container, said mixed and magnetized powder is sintered in said form with the exclusion of air at a temperature of about 25°
- C. from solidus temperature of said material and less, but at a sufficient temperature to effect said sintering so as to produce a sintered body of a density without communicating porosity.
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Abstract
A powder metallurgical method of producing metal bodies using spherical powder, produced by inert gas atomization, from magnetizable material with a particle size distribution closely approximating the so called Fuller curve for maximum density packing of spherical particles. Said powder is magnetized and filled into a form, which may take place before or after magnetization, said mixed and magnetized powder then sintered in said form with the exclusion of air, to produce a sintered body without communicating porosity.
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Citations
8 Claims
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1. A powder metallurgical method for producing metal bodies, wherein a particle size distribution closely approximating the so-called Fuller curve for maximum density packing of spherical particles is chosen of at least two powder fractions with different mean particle size relationship vis-a-vis each fraction, said powder being a spherical powder of magnetizable material produced by inert gas atomization, the powder is then magnetized and introduced into a container or the powder is magnetized after introduction in said container, said mixed and magnetized powder is sintered in said form with the exclusion of air at a temperature of about 25°
- C. from solidus temperature of said material and less, but at a sufficient temperature to effect said sintering so as to produce a sintered body of a density without communicating porosity.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification