Aluminum master alloys containing strontium, boron, and silicon for grain refining and modifying aluminum alloys

US5230754A · kind A · utility

Assignee

• KB Alloys

Inventors

• William C. Setzer · Creve Coeur, US
• David K. Young · Fairport, US
• Bryan T. Dunville · Sebree, US
• Frank P. Koch · Evansville, US
• Richard J. Malliris · Henderson, US

Key dates

• Filing date: Mar 4, 1991
• Grant date: Jul 27, 1993
• Expiry date: Mar 4, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C1/03
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Improved aluminum master alloys containing strontium and boron are provided for simultaneously modifying and grain refining Al alloys, and in particular, hypoeutectic Al-Si alloys. The improved master alloy contains, by weight percent, about 0.20-20% Sr, 0.10-10% B, and the balance Al with impurities. The master alloy may also contain about 0.20 to about 20% Si by weight percent. The master alloys have a high degree of ductility for purposes of forming continuously rolled master alloy rod stock.