Search International and National Patent Collections

1. (WO2001036695) METHOD FOR ULTRASONIC TREATMENT OF A MELT OF HYPEREUTECTIC SILUMINS

Pub. No.:    WO/2001/036695    International Application No.:    PCT/RU2000/000467
Publication Date: Sat May 26 01:59:59 CEST 2001 International Filing Date: Thu Nov 16 00:59:59 CET 2000
IPC: B22D 1/00
B22D 11/114
C22B 9/02
C22B 21/06
C22C 1/02
C22C 1/03
C22C 1/06
C22F 3/02
Applicants: ESKIN, Georgy Iosifovich

SHAPIRO, Boris Mikhelievich

SUKHOLINSKY-MESTECHKIN, Sergei Leonidovich

Inventors: ESKIN, Georgy Iosifovich

SHAPIRO, Boris Mikhelievich

SUKHOLINSKY-MESTECHKIN, Sergei Leonidovich

Title: METHOD FOR ULTRASONIC TREATMENT OF A MELT OF HYPEREUTECTIC SILUMINS
Abstract:
The invention relates to a metallurgy of light alloys in particular to methods for ultrasonic treatment of melts in a production of shaped castings from hypereutectic silumins of a piston group. The method consists of a degasification and a following modification of the melt by introducing in it modification additives which contain phosphorus. After the modification, the ultrasonic treatment of a melt stream is being performed and accompanied by a developed cavitation in such a way that a volume of a cavitation field conforms to a total volume of the melt passing through the area of ultrasonic treatment. The ultrasonic treatment of every element of the melt stream is performed during 0.15 s to 1.2 s depending on the concentration of said modification additives which represent 0.01 to 0.06 % of the total mass of the melt. The inventive method is directed at increasing the fatigue strength of castings at high working temperatures.