US 5,305,817 AGranted

Method for production of metal base composite material

AssigneeVsesojuzny Nauchno-Issledovatelysky I Proektny Institut Aluminievoi, Magnievoi I Elektrodnoi Promyshlennosti

InventorsValery G. Borisov, Ljudmila P. Borisenko, Alexandr V. Ivanchenko, Nikolai A. Kaluhsky, Alexandr P. Bogdanov, Vladimir M. Rapoport, Nikolai N. Belousov, Svetlana N. Pavlova, Tatyana I. Belyaeva, Vladimir V. Volkov, Viktor S. Shusterov

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Abstract

A method of making a composite material consists of entraining finely divided solid additive particles in a stream of ionized inert gas and ionizing the inert gas and utilizing heat generated by the ionized gas to heat the solid particles to a high temperature which is less than the temperature in at which the solid particles become non-solid due to melting sublimination or dissociation. Then, injecting the stream of gas and entrained heated solid particles into a molten metal mass to provide a mixture of finely divided solid particles and molten metal and thereafter causing physical agitation of the mixture of molten metal and solid particles to establish a substantially uniform distribution of solid particles in the molten metal. Such physical agitation of molten metal is continued until the mixture of finely divided particles and metals is completely solidified.

Claims18

Dependent claims

A method of making a composite material, comprising:

(a) entraining finely divided solid additive particles having surfaces in a stream of ionized inert gas;
(b) preheating said finely divided solid additive particles to a temperature between 0.5-0.9 of a melting point of said solid, additive particles to provide sufficient degree of activation for interphase action to achieve a sufficient bond between said additive particles and a base metal and to prevent agglomeration of said additive particles into a large formation during mixing of said additive particles in the molten base metal;
wherein said temperature of preheating said finely divided solid additive particles is determined in accordance with the formula ##EQU4## wherein:
.theta.--temperature of said molten base metal after injection of said additive particles, .degree. C.;
T.sub.m --molten base metal temperature before injection of said additive particles, .degree. C.;
C.sub.m --specific heat of the base metal ##EQU5## M.sub.m --said metal base mass, Kg;
C.sub.p --specific heat of said additive particles ##EQU6## M.sub.p --mass of said additive particles, Kg;
K.sub.n --dimensionless factor taking into account heat effects upon air cooling of melt surface during preheating in treatment by stream of ionized gas without injection of the additive particles, K.sub.m =0.05-0.06 for 5 Kg of the molten metal and an ionized argon gas flow of 0.1 M.sup.3 /min.
(c) injecting said stream of ionized inert gas and said entrained preheated additive particles deep into a body of molten base metal;
forming a mixture of said additive particles and said molten base metal;
(d) continuously agitating said mixture during all phases of formation of said composite material to establish a substantially uniform distribution of said additive particles in the molten metal;
and
(e) conveying said mixture into a suitable mold.

10 more elements

A method of making a composite material, comprising:

(a) entraining finely divided solid additive particles having surfaces in a stream of ionized inert gas;
(b) selecting a predetermined temperature;
(c) preheating said finely divided solid additive particles to said predetermined temperature, said predetermined temperature of preheating said finely divided solid additive particles is determined in accordance with the formula ##EQU7## wherein:
.theta.--temperature of said molten base metal after injection of said additive particles, .degree. C.;
T.sub.m --molten base metal temperature before injection of said additive particles, .degree. C.;
C.sub.m --specific heat of the base metal ##EQU8## M.sub.m --said metal base mass, Kg;
C.sub.p --specific heat of said additive particles ##EQU9## M.sub.p --mass of said additive particles, Kg;
K.sub.n --dimensionless factor taking into account heat effects upon air cooling of melt surface during preheating in treatment by stream of ionized gas without injection of the additive particles, K.sub.n =0.05-0.06 for 5 Kg of the molten metal and an ionized argon gas flow of 0.1 M.sup.3 /min;
(d) injecting said stream of ionized inert gas of said entrained preheated additive particles deep into a body of molten base metal;
forming a mixture of said additive particles and said molten base metal;
and
(e) conveying said mixture into a suitable mold.

9 more elements

Dependencies are inferred from the claim text.