METHOD FOR ULTRASONIC TREATMENT OF A MELT OF HYPEREUTECTIC SILUMINS

Title:

METHOD FOR ULTRASONIC TREATMENT OF A MELT OF HYPEREUTECTIC SILUMINS

Document Type and Number:

WIPO Patent Application WO/2001/036695

Kind Code:

A1

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.

Inventors:

ESKIN GEORGY IOSIFOVICH (RU)
SHAPIRO BORIS MIKHELIEVICH (RU)
SUKHOLINSKY-MESTECHKIN SERGEI (RU)

Application Number:

PCT/RU2000/000467

Publication Date:

May 25, 2001

Filing Date:

November 15, 2000

Export Citation:

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Assignee:

ESKIN GEORGY IOSIFOVICH (RU)
SHAPIRO BORIS MIKHELIEVICH (RU)
SUKHOLINSKY MESTECHKIN SERGEI (RU)

International Classes:

B22D1/00; B22D11/114; B22D27/00; C22B9/02; C22B21/06; C22C1/02; C22C1/03; C22C1/06; C22F3/02; (IPC1-7): C22C1/06; C22F3/02

Foreign References:

SU618436A1	1978-08-05
SU353790A
GB2100635A	1983-01-06
RU2031171C1	1995-03-20
GB1527916A	1978-10-11

Other References: