US 10,293,407 B2 · Method of producing atomized metal powder

Abstract

A water-atomized metal powder is produced by dividing a molten metal stream into a metal powder by making injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more impinge on the molten metal stream and cooling the metal powder. Cooling with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more enables can be performed not in the film boiling region but in the transition boiling region from the beginning of cooling. A gas-atomized metal powder may also be produced by dividing a molten metal stream into a metal powder by making an inert gas impinge on the molten metal stream and cooling the metal powder with injection water having a liquid temperature of 10° C. or less and an injection pressure of 5 MPa or more.

Claims6

Dependent claims

A method of producing an atomized metal powder comprising dividing a molten metal stream into a metal powder by making a fluid impinge on the molten metal stream;

and cooling the metal powder, the fluid being injection water having a temperature of 10° C. or less and an injection pressure of 5 MPa to 20 MPa, the fluid being used to divide the molten metal stream and cool the metal powder.

Dependencies are inferred from the claim text.

Facts

Application

15/129,839Filed 13 Mar 2015

Priority

JP 2014-07278631 Mar 2014

Published

US 2017/0144227 A125 May 2017

Granted

21 May 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

B22F 9/082
By casting, e.g. through sieves or in water, by atomising or spraying: atomising using a fluid
B22F 9/002
Making metallic powder or suspensions thereof: amorphous or microcrystalline
C22C 33/0264
Characterised by the range of the alloying elements: the maximum content of each alloying element not exceeding 5%
C22C 45/02
Amorphous alloys: with iron as the major constituent

Method of producing atomized metal powder

Life of this patent

Method of producing atomized metal powder

Life of this patent

Abstract

Claims6