Prealloyed high-vanadium, cold work tool steel particles
AssigneeCrucible Materials Corporation
InventorsWilliam Stasko, Kenneth E. Pinnow
Life of this patent
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Abstract
Prealloyed high-vanadium, cold work tool steel particles are provided for use in the powder-metallurgy production of tool steel articles. The particles are of a cold work tool steel alloy having an MC-type vanadium carbide dispersion of a carbide particle size substantially entirely less than 6 microns and in an amount of 18.5 to 34.0% by volume. The particles are produced by atomizing a molten tool steel alloy at a temperature above 2910.degree. F. and rapidly cooling the atomized alloy to form solidified particles therefrom. The particles have the MC-type vanadium carbide dispersion therein.
Claims6
In prealloyed cold work tool steel particles for use in the powder-metallurgy production of tool steel articles, the improvement comprising:
- said particles comprise a cold work tool steel alloy having a substantially uniform MC vanadium carbide dispersion of a carbide particle size substantially entirely less than 6 microns and in an amount of 18.5 to 34.0% by volume,
- wherein said particles have a grindability index of above 0.7, as defined herein, a Charpy C-notch impact strength above 3 ft-lbs, as defined herein, and a pin abrasion test weight loss of less than 32 milligrams, as defined herein.
Dependencies are inferred from the claim text.