NO120654B - - Google Patents

Description

Application of a fine zinc alloy.

The invention relates to the use of a fine zinc alloy consisting of 0.05 to 0.25# titanium, 0.02 to 0.20$ copper, 0.005 to 0.05$ aluminum, the remainder fine zinc 99.9 to 99.995$.-

A permanently fixed zinc alloy is known with a content of lead from 0 to 1%, cadmium from 0 to 0.05%, copper from 0 to 1.2%, this alloy being characterized in that it has a titanium content of 0.05 to 0»25$> aluminum content of, more than 0.003 to less than 0.05$, preferably from 0.01 to 0.03$, the balance fine zinc and/or process zinc, and is free of magnesium, lithium , beryllium and calcium.

The alloys can thus be characterized as the zinc-titanium-aluminium type, because the titanium content determines the permanent strength, the aluminum content; casting conditions and thus the economy. However, practical experience has not only confirmed this, but with fine zinc alloys of this type, additional surprising effects have also appeared.

To increase the strength, a copper content of more than 0.15 to 2% copper is suggested for most titanium-containing zinc alloy. In the production of rolled alloys with titanium and aluminum within the specified limits, it turns out that when fine zinc is used with a purity of at least 99.9$, the strength is already increased by a small copper content of less than 0.2$ and, even in the cold-rolled state, it has a considerable permanent strength and ductility, i.e. both without heat treatment. The heat treatment itself, when used, can already be carried out at lower temperatures.

Accordingly, the object of the invention is the use of a fine zinc alloy consisting of 0.05 to 0.25$ titanium, 0.02 to 0.20$ copper, 0.005 to 0.05$ aluminum, the remainder fine zinc 99.9 to 99.995<$>; as in the cold-rolled state permanently fixed and ductile alloy.

Example 1.

Each time a 1000 kg block of 80 mm thickness was cast in a horizontal mold at 250°C, rolled to 8 mm and cold rolled at room temperature from 8 mm to 0.8 mm.

Alloy with 0.5 to 0.8$ copper

0.1 to 0.15$ titanium

Maximum 0.001$ aluminum

the rest fine

Example 2.

Each time a 1000 kg block of 80 mm thickness was cast in a horizontal mould, rolled to 8 mm at 250°C and cold rolled at room temperature from 8 mm to 0.8 mm.

Alloy with 0.2 to 0.5$ Copper

0.1 to 0.15$ titanium

Al max. 0.001$

the rest fine

Example 3.

Each time a 1000 kg block of 80 mm thickness was cast in a horizontal mold at 250°C, rolled to 8 mm and cold rolled at room temperature from 8 mm to 0.8 mm.

Alloy with 0.05 to 0.15$ copper

0.10 to 0.15$ titanium

0.01 to 0.02$ aluminum the rest fine zinc

Titanium-aluminium-containing rolling alloys with a low copper content of less than 0.2$, preferably 0.05 to 0jl$> already have a considerable permanent strength when processed without breakage in the rolled state. This is a decisive advance because the alloys with a higher copper content without aluminum that have been produced until now, after permanent annealing, greatly lose their creep strength when the band material treated in this way was cold-formed during processing, e.g. by embossing.

The possible heat treatment of the alloy to be used according to the invention can preferably be carried out in the temperature range from 120 to 180°G. In the same temperature range, the alloy can also be hot-rolled.

Claims (1)

Use of a fine zinc alloy consisting of 0.05 to 0.25$ titanium, 0.02 to 0.20$ copper, 0.005 to 0.05$ aluminum, the remainder fine zinc 99»9 to 99>995$)as in the cold-rolled condition permanently fixed and ductile alloy.