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US 6,461,565 B2Granted
Method of pressing rare earth alloy magnetic powder
AssigneeSumitomo Special Metals Co., Ltd.
InventorsKoki Tokuhara, Shuhei Okumura, Akiyasu Oota
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Abstract
A green compact of a rare earth alloy magnetic powder is made by pressing the powder. The powder is pressed within an air environment that has a temperature controlled at 30° C. or less and a relative humidity controlled at 65% or less.
Claims12
A method of forming a green compact of a rare earth alloy magnetic powder comprising the steps of:
- providing a rare earth alloy powder,
- providing a controlled environment having a temperature ranging from 5° C. to 30° C. and a relative humidity ranging from 40% to 65%, and
- pressing the rare earth alloy powder within the controlled environment.
A method of forming a green compact of a rare earth alloy magnetic powder comprising the steps of:
- providing a rare earth alloy powder,
- providing a controlled environment having a temperature ranging from 5° C. to 30° C. and a relative humidity ranging from 40% to 65% and a dew point of at least 6° C. less than the temperature, and
- pressing the rare earth alloy powder within the controlled environment.
Dependencies are inferred from the claim text.