DE2108184A1 - Zinc alloy - Google Patents

Description

PATENT ADVERTISER 4 DÖSSELDORF-BENRATH 2108184

DlPL-ING. ULRICH PLÖGER BENRAWER SCHLOSSAUEE 89

TELEPHONE 7132 34 PL / Ma

REG. NO. 1771

CENTER NATIONAL DE RECHERCHES METALLURGIQÜES, *

Association Sans But Lucratif, ™

47, rue Montoyer, Brussels / BELGIUM

Zinc alloy

The invention relates to an alloy with zinc as the base metal, in which the mechanical properties, in particular the elongation properties, are improved , especially compared to those of pure zinc, as it is produced electrolytically or thermally.

It is assumed that the metals with a hexagonal dense structure are characterized by a lower plasticity, which property is furthermore worsened by the majority of the additives made to them. The »·· is

BAO LOCATIONAL

109836/1008

It was the case in zinc, and the change in its plasticity was often due to its various additives.

Surprisingly, it has now been found that the addition of the Rare earth elements in zinc contribute to a marked improvement in the malleability of this metal, although these elements are also of a hexagonal, dense structure.

This property has proven to be especially true for the binary zinc / rare earth compounds, which is a or contain more of the following rare earths; Dy, Er, Gd, Ho, Nd, Pr, La; the share may be for one or more Elements do not exceed 5% and preferably 1% per unit.

Particularly beneficial results have been found with binary alloys obtained, in which the content of one or the other element of the aforementioned rare earths is of the order of 0.1% with the remainder consisting of zinc with its usual impurities of Pb, Sn, Cd, Fe, In, Ag and the like.

The emergence of an improvement in the ductility values of these alloys, however, is indicated by the characteristics of the final rolling to which these alloys are subjected, the improvement mentioned being all the more noticeable is, the closer the temperature of the final rolling approaches the ambient temperature.

The table below shows a comparison of the results of the Fold bending test on the one hand for pure electrolyte zinc and on the other hand for a number of binary alloys of the type mentioned above:

BATH

109836/1058

Final rolling at Final rolling at 200 ° C Ambient temperature Zn 13th 11 Zn + 0.1 1 9 28 Zn + 0.1 1 19th 23 Zn + 0.1 1 18th 26th Zn + 0.1 1 18th 22nd Zn ♦ 0.1 1 21st 17th Zn + 0.1 1 13th 20th ϊ Dy k he i Gd i Ho t Nd k Pr

The figures shown represent the index of the bending made transversely to the direction of the whale using the Amsler method of alternating bending.

In the area of the improvements made in zinc by the addition of the above-mentioned rare earth elements, it must be stated that these improvements continue, albeit at a lower level if the zinc contains magnesium in a proportion below 0.1%.

BATH ORIGINAL

109836/1008

Claims (2)

- * - 2108784 PATENT CLAIMS 1. Binary zinc alloy, characterized in that it contains one or more of the rare earths selected from the group Dy, Er, Gd, Ho, Nd, Pr, La, the total weight proportion of these rare earths not exceeding S% and the weight proportion for a rare earth does not exceed 1% and the remainder consists of zinc and its common impurities Pb, Sn, Cd, Fe, In, Ag and the like. 2. Alloy according to claim 1, characterized in that it is subjected to final rolling, the temperature of which ^{does not exceed 200 0} C and is preferably close to the ambient temperature. 109836/1008