SU548173A1 - Aluminium-base alloy - Google Patents

Abstract

ALUMINUM BASED ALLOY, wed ochuap1 ^ 1st burned (eso and at least one metal selected from the group of rare-earth metals, so that, in order to increase the radar strength while maintaining a high level of electrical conductivity It additionally contains alumina in the following ratio of components, wt%: At least one metal selected from the group of rare-earth metals 5-20 Iron 0.15-0.70 Oxide. Aluminum 0.1-1.0 Aluminum Rest

Description

The invention relates to the metallurgy of alloys, in particular alloys based on aluminum, intended for use as electrical conductors operating at a temperature of 250-350 ° C, when a combination of sufficiently high strength and high electrical conductivity is required.

The known alloy based on aluminum with a content of 0.2-5 wt.% Rare earth metals, intended for conductors of electric current can be used to work at temperatures up to 150 C.

The closest to the invention in technical essence and the achieved positive effect is an alloy of the following composition, wt.%:

At least one

metal selected from

rare earth groups

metals0.05-20

IronOh, 1

Aluminum Else

This alloy has high properties at room temperature, but at elevated temperatures (250 ° C) the alloy is strengthened rapidly, which makes it unsuitable for operation at a temperature of 250-350 ° C.

The invention is the development of an alloy based on aluminum, which would have increased heat resistance with high electrical conductivity and corrosion resistance.

To achieve this goal, aluminum containing iron, and at least one metal selected from the group of rare-earth metals, was additionally introduced with alumina with a 1: 1 ratio of components, wt.%:

At the very least, a metal selected from the group of rare-earth metaples 5-20

Iron0.15-0.70

Aluminum window 0.1-1.0

Aluminum Else

The introduction of rare earth metals, oxide a: nominees and iron into the alloy, with their insignificant solubility in solid aluminum, leads to the hardening of alloys without changing the composition of the aluminum matrix and without a significant decrease in electrical conductivity, due to the dispersion of intermetallic eutectic particles. Sufficient dispersion of intermetallic inclusions provides high strength both at room temperature and at elevated temperatures (up to 350 ° C).

From the proposed alloy, the batches of the granules of the following composition were cast, wt%: lanthanum 7.10, 15.20, oxide.

aluminum 0.2, 0.3 and 0.8, iron 0.20, 6, the rest of aluminum, cerium 7 and 15, aluminum oicHCb 0.2, iron 0.2, the rest aluminum, neodymium 7, aluminum oxide 0.2 , iron 0,2, aluminum

the rest of which were made rods with a diameter of 12.0 and 3.0 mm. Typical mechanical svdstva and electrical conductivity of wire with a diameter of 1.5 mm, made of rods,

are shown in the table.

From the analysis of the data in the table, it is assumed that the proposed alloy has a higher strength at 250 ° C than the known alloy, and is similar in terms of electrical conductivity to the known one.

Sharpened 30.1 1.8 14.6

Annealed (400s, 3h) 21.0 5, A 16.8

The same 23.0 5.1 18.1

20.1 4.3 13.6

2.3

1.9

29.2

1.6

2.5

Claims (1)

ALUMINUM ALLOY, comprising iron and at least one metal selected from the earth metals jt about in that, from the group of redox, with the aim of increasing heat resistance while maintaining a high level of electrical conductivity, it additionally contains aluminum oxide in the following ratio of components, May . ”: At least one metal selected from the group of rare earth metals Iron Alumina Aluminum 5-20 0.15-0.70 0, 1-1.0 Rest