SPHERICAL POWDERS

• US 3,652,259 A
• Filed: 05/14/1968
• Issued: 03/28/1972
• Est. Priority Date: 05/14/1968
• Status: Expired due to Term

• Current Assignee: Walter V. Knopp
• Original Assignee: Walter V. Knopp
• Inventors: Knopp, Walter V.
• Primary Examiner(s): Rutledge, L. Dewayne
• Assistant Examiner(s): Stallard, W. W.
• Application Number:
  US04/728,923
• Time in Patent Office: 1,414 Days
• Field of Search: 75/.5B,.5BA,.5BB,.5BC 264/15
• US Class Current: 75/342
• CPC Class Codes: B22F 1/065 Spherical particles

Abstract

The instant disclosure teaches an improved process for obtaining dense, spherical, metal particles characterized by coating the starting material with a weld-preventing material and heating the coated particles in a protective atmosphere.

Claims

2. A process according to claim 1 wherein said particles are copper or copper base alloys.

3. A process according to claim 1 wherein the starting material metallic particles in step (A) are obtained by sintering a plurality of metal particles to form a cake and mechanically breaking up said cake.

4. A process according to claim 3 wherein the particles which are sintered have a particle size smaller than 100 mesh.

5. A process according to claim 1 wherein the starting material metallic particles in step (A) are obtained by disintegrating a stream of molten metal by impinging said stream with a fluid.