SU1377251A1 - Low-melting glass for thermomechanical treatment of aluminium alloys - Google Patents

Abstract

The invention provides the use of low-melting glass as a liquid medium transmitting pressure during hydrostatic compaction by increasing the coefficient of thermal expansion. The following components are molded into the glass composition, mol% 8-25; 3-5; 8-25; K, S04 13-20; ZnS04 30-55; K, 0 2-6. Glass is synthesized under the usual conditions: in air in alundum crucibles, in an electric furnace at a temperature of 600-650 C. KTP glass

Description

WITH

113

This invention relates to inorganic chemistry, in particular, to chemical compositions of low-melting glasses, the melts of which can be used as a liquid medium transmitting pressure during high-temperature hydrostatic compaction of light alloys, in particular aluminum alloys.

The aim of the invention is to provide use as a fluid medium transmitting pressure at

hydrostatic compaction, for

term increase account

cic expansion.

In tab. 1 shows the specific compositions of glasses.

Synthesis of glass is carried out in air by melting the mixture at 620-680 ° C in corundum; crucibles in electric furnaces of resistance from reagent grade hch: NaHj P04 2H20; ,; , 7H20; Kno ,.

B tab. 2 shows the properties of the proposed glasses.

The offered glasses can be used in the metallurgical industry.

It also creates the necessary pressure in it by applying an external load. After a certain time delay, the load is removed, the container is opened and the product is removed, which is placed in a vessel (for example, in a bath) with water to remove glass from the surface of the workpiece (from divided). After complete dissolution (destruction) of the glass, the product is dried and shipped on the following operations of the technological cycle. As a result of high-temperature hydrostatic compaction, the strength of the metal increases significantly. The strength of products increases by no less than 12-15%.

Claims (1)

Invention Formula Fusible glass for thermomechanical processing of aluminum alloys, including ZnSO and potassium salt, characterized in that, in order to ensure use as a fluid medium transmitting pressure during hydrostatic compaction, by increasing the thermal Musculoskeletal transducer for conducting VTGU Alloy 30 expansion, it is as a salt of cava aluminum. To do this, a product made of an aluminum alloy is required to be placed in a special container, preheated, which needs to be sealed, it is poured with molten glass and the container is closed. The container with glass and product is heated to a temperature of high-temperature hydrostat- Composition The content in the composition, mol.%  , Na ,, 0 LIA contains K2S04 and in the following ratio of components, mol.%: 8-25 8-25 five , ZnS04 to 5.0 3-5 30-55 13-20 2-6 Table 1 ZnS04 I Table 2.