The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 1980
Filed:
Sep. 01, 1978
Alexandr G Merzhanov, Moskovskaya oblast, Chernogolovka, SU;
Alexandr R Kachin, Moskovskaya oblast, Chernogolovka, SU;
Vladimir I Jukhvid, Moskovskaya oblast, Chernogolovka, SU;
Inna P Borovinskaya, Moskovskaya oblast, Chernogolovka, SU;
Galina A Vishnyakova, Moskovskaya oblast, Chernogolovka, SU;
Other;
Abstract
A method for the production of two-layer pipe casting is carried out in the following manner. First, a reaction chamber is filled with an initial mixture. Then, the reaction chamber with the initial mixture is set in rotation about its longitudinal axis whereupon the centrifugal acceleration of the reaction chamber is brought up to about 300 to about 1000 g. The initial mixture is then inflamed and centrifugal acceleration is gradually brought down to about 50 to about 100 g for a time period sufficient to enable combustion of the initial mixture as well as subsequent separation of the resultant melt into two layers, external and internal, until their solidification. The separation of the melt composed of the final products of combustion into two layers takes place under the action of centrifugal forces due to the difference in specific weights of said layers. In the course of crystallization of the pipe external and internal layers, as well as during their subsequent cooling, centrifugal acceleration is maintained constant.