ZUSATZ ZUR WASSERABSCHRECKUNG DURCH EINTAUCHEN VON ALUMINIUMBASISLEGIERUNGEN

An agent for aqueous quenching of components of aluminium alloys, that have been previously raised to a temperature of at least 430 DEG C comprises, per litre of water, from 5 to 35g and preferably from 6 to 20g of polyvinyl pyrrolidone and from 50 to 250 g of an additive that causes reversible prec...

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Bibliographische Detailangaben
Hauptverfasser:	MOREAUX,FRANCOIS, NAUD,JEAN-MICHEL, BECK,GERARD
Format:	Patent
Sprache:	ger
Schlagworte:	CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	An agent for aqueous quenching of components of aluminium alloys, that have been previously raised to a temperature of at least 430 DEG C comprises, per litre of water, from 5 to 35g and preferably from 6 to 20g of polyvinyl pyrrolidone and from 50 to 250 g of an additive that causes reversible precipitation of polyvinyl pyrrolidone at the surface of the components at the moment when they are introduced into the quenching agent. The most effective additive is sodium chloride, in a concentration of from 100 to 250 g/l.