Patent · US Expired

Process for producing spheroidized hard material powder

US6428600B1 · kind B1 · utility

30Cited by

5References

26Claims

0Family size

Inventors

Walter Flurschütz · Heringen/Helme, DE
Alexander Klein · Troisdorf, DE
Rudi Horn · Heringen/Helme, DE
Simon Zakharian · Stuttgart, DE

Key dates

Filing date	Sep 22, 2000
Grant date	Aug 6, 2002
Priority date	—
Expiry date	Sep 22, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2004/32
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The spheroidized hard material powders are produced by introducing a finely ground basic mixture of hard material into a thermal, inductively coupled high-frequency plasma so that at the same time a chemical conversion reaction to form an alloy and/or chemical reaction and spheroidization of the particles in the plasma take place. The hard material mixture may be powder, granules, or a suspension or any combination thereof. Hence, a mixture consisting of MexMy, wherein Me is a metal and M is a metalloid so that different metals and metalloids may be combined in the required metal-metalloid ratio is injected axially into an inductively coupled, high-frequency plasma with the aid of a carrier gas stream. The spheroidized hard material powder has excellent suitability for protection against wear.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.