Specialized metallurgical processes – compositions for use therei – Processes – Producing or purifying free metal powder or producing or...
Patent
1995-02-22
1996-12-10
Wyszomierski, George
Specialized metallurgical processes, compositions for use therei
Processes
Producing or purifying free metal powder or producing or...
75354, 241 27, B22F 904
Patent
active
055826296
ABSTRACT:
The present invention provides a process for reforming sponge titanium powder into intermediate titanium particles of desirable fluidity and superior bulk specific gravity suitable as a starting material of a titanium or titanium alloy product to be produced by powder metallurgy, comprising the steps of: charging a sponge titanium powder in mill pots of a planetary ball mill together with crushing medium; collapsing the particles of the powder to be consolidated forming a squamation under an inert atmosphere in the mill pots; and adjusting the particle size and particle diameter by cutting the squamated particle under an inert atmosphere in a crushing medium stirring mill. Thus a fundamental process has been developed for producing a material for a compact completely provided with superior properties of titanium such as high specific intensity, high fatique resistance at a considerably low cost just by molding powder and sintering it using an inexpensive powder of low purity without any hydrogeneration-dehydrogeneration treatment, HIP treatment, heat treatment and surface treatment, etc.
REFERENCES:
patent: 3930841 (1976-01-01), Volin et al.
patent: 4761263 (1988-08-01), Politis et al.
patent: 4934610 (1990-06-01), Buans
Arakawa Kazuaki
Nakai Sadao
Kurimoto Ltd.
Wyszomierski George
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