DE1247029B - Use of an aluminum alloy for counter rotor disks and the like. like - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

C22c

German KL: 40 b - 21/00

Number: 1247 029

File number: V 20349 VI a / 40 b

Filing date: March 16, 1961

Opened on: August 10, 1967

The invention relates to an aluminum alloy for electrical conducting purposes, in particular for counter carrier disks.

It is well known that meter carriers are almost exclusively made of pure aluminum 99.5 to 99.8% purity with a silicon content up to about 0.3% used.

All of these types of aluminum contain a relatively high percentage of silicon, which is in the dissolved Condition greatly reduces the conductivity and also worsens the other electrical properties. In addition, the solubility changes greatly in the range from 200 to 400 ° C, whereby the Manufacture of semi-finished products with uniform electrical and mechanical properties made more difficult or is prevented.

To eliminate these deficiencies, it has already been proposed to use pure or ultra-pure aluminum with additives to be provided with boron and magnesium, with which a particularly high strength can be achieved could, but the specific electrical conductivity is insufficient for other purposes.

It is also known to use boron and other substances such as B. carbon, individually or together with the aluminum to be added to increase the specific electrical conductivity. The addition of iron too Aluminum for increasing strength is well known. It is a disadvantage with all of these proposals However, that the fluctuation of the specific electrical conductivity in a sheet that has been made up to now known alloys can be produced for the intended use considerably is great.

The object of the invention is now to eliminate these disadvantages and to create an aluminum alloy with which a particularly high conductivity, for example from 36 to 37 m / ohm · mm ² , can be achieved without high strength.

According to the invention, this is achieved through the use of an alloy of 0.1 to 0.3% iron, 0.01 to 0.05% boron, the remainder being aluminum with less than 0.005% Ti and less than 0.01% Si + Cu + Zn + Ti as a material for objects that have at least 36 m / ohm · mm ² conductivity compared to pure aluminum, increased strength and equal use of an aluminum alloy for
Counter carriers and the like.

Applicant:

VEB Elektro-Apparate-Werke Berlin-Treptow,

Berlin-Treptow, Hoffmannstr. 15-26

Named as inventor:

Dipl.-Phys. Werner Hirte, Berlin-Bohnsdorf

moderate electrical and mechanical properties must have, especially for counter carriers.

The alloy according to the invention is advantageously characterized in that with the high conductivity there is optimal strength and they are far less affected by temperature fluctuations during manufacture is dependent than the previously customary pure aluminum alloys and therefore with regard to Uniformity of electrical and mechanical properties is much better.

Claims (1)

Claim: Use of an aluminum alloy of 0.1 to 0.3% iron, 0.01 to 0.05% boron, the remainder being aluminum with less than 0.005% titanium and less than 0.01% Si + Cu + Zn -f Ti Material for objects that have a conductivity of at least 36 m / ohm · mm ² compared to pure aluminum and must have increased strength and uniformity of electrical and mechanical properties, especially for counter carriers. Considered publications:
German Patent No. 399 026;
British Patent No. 636,433;
U.S. Patent No. 2,545,866;
Aluminum, 31, 338-341 (1955);
Chemisches Zentralblatt, 1955, pp. 678 and 10367; Aluminum Taschenbuch, 1955 (11th edition), p. 57.