GB748871A - Heat-treatment of alloys containing zinc and aluminium with a tendency to form dendrites on solidification - Google Patents

Heat-treatment of alloys containing zinc and aluminium with a tendency to form dendrites on solidification

Info

Publication number
GB748871A
GB748871A GB24904/52A GB2490452A GB748871A GB 748871 A GB748871 A GB 748871A GB 24904/52 A GB24904/52 A GB 24904/52A GB 2490452 A GB2490452 A GB 2490452A GB 748871 A GB748871 A GB 748871A
Authority
GB
United Kingdom
Prior art keywords
aluminium
per cent
alloys containing
solidification
tendency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB24904/52A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fr Nielsen & Co GmbH
Original Assignee
Fr Nielsen & Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fr Nielsen & Co GmbH filed Critical Fr Nielsen & Co GmbH
Publication of GB748871A publication Critical patent/GB748871A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/165—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon of zinc or cadmium or alloys based thereon

Abstract

A method of improving the toughness of aluminium-zinc alloys containing at least 20 per cent aluminium which on solidifying tend to produce dendrites, comprises annealing the alloy at a temperature between 300 DEG C. and the melting point for 1-3 hours and cooling at a rate not exceeding 5 DEG C. per minute. The cooling may be carried out immediately after casting or the casting may be cooled and reheated to the annealing temperature. The alloys treated may contain 20-50 per cent Al; up to 5,0 per cent Cu; up to 0,2 per cent Mg; and the balance Zn and unavoidable impurities. The preferred annealing range is 300-400 DEG C. and the cooling rate below 1 DEG C. per minute.
GB24904/52A 1951-10-03 1952-10-03 Heat-treatment of alloys containing zinc and aluminium with a tendency to form dendrites on solidification Expired GB748871A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE748871X 1951-10-03

Publications (1)

Publication Number Publication Date
GB748871A true GB748871A (en) 1956-05-16

Family

ID=6649100

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24904/52A Expired GB748871A (en) 1951-10-03 1952-10-03 Heat-treatment of alloys containing zinc and aluminium with a tendency to form dendrites on solidification

Country Status (1)

Country Link
GB (1) GB748871A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2982677A (en) * 1957-10-10 1961-05-02 Voest Ag Bearing alloys

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2982677A (en) * 1957-10-10 1961-05-02 Voest Ag Bearing alloys

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