Development of Hypereutectic Aluminum-Silicon Alloys for High Pressure Die Casting

The current paper presents the results of the experimental program to develop of hypereutectic aluminum-silicon alloy similar to the 390 alloy for high pressure die casting. Calcium and zirconium were respectively used as eutectic silicon modifier and primary silicon refiner. Calcium, once considered deleterious because of its effect on the properties of aluminum alloys, is now considered beneficial in many ways. The addition of calcium decreases the nucleation temperature of the primary silicon, thus makes the developed alloy suitable for high-pressure die casting avoiding the problems such a reduced die life, due to a thermal fatigue and abrasion. In addition, a low pouring temperature of new hypereutectic die casting alloy minimizes the risk of the melt spurting out of the die and appearance of hot tearing. The optimum alloy and process parameters of the high pressure die casting process were selected by a designed die which contains test samples for measurement of hot tearing resistance, die sticking tendency, mechanical properties and abrasive wear. Effects of filling conditions on microstructure and mechanical properties of AlSi17Cu4 with combinations of Ca and Zr are discussed.

This is a paper being Presented at the 113th Metalcasting Congress. Registration Open Now!

Heat Treating of Light Alloys

March 25-26, 2009

Doubletree HotelAnaheim/Orange County, CA USA

Mark your calendars for the first-time presentation on light alloys in heat treating. Learn all about aluminum and titanium, next generation composites, new techniques in processing, microstructure development, resultant properties and performance. Get a leg up on the competition in the fast-changing world of light alloys.Network and do business with the best in the heat treating industry.

Aluminium Cast House Technology 11th Australasian Conference & Exhibition

ACHT2009 The 11th Australasian Conference and Exhibition

Date Sunday 13th September to Wednesday 16th September 

Venue Surfers Paradise Marriott Resort & Spa 

Location Surfers Paradise, Gold Coast, Queensland, Australia

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Call for Papers

The call for papers for the conference is open and the deadline for submission of abstracts is fast approaching. Abstracts should be submitted by 14th November - that's next week!

Abstracts will be used to select those papers to be presented at the conference, which will also be published as 8 page full technical papers in a hard bound copy of the conference proceedings (also to be available on CD). 

We are using an online conference paper management system called "EasyChair" to manage the submission of both abstracts and then papers. Instructions for using EasyChair are available from our website or you can visit the EasyChair site directly here. 

About the conference

The Aluminium Cast House Technology conference and exhibition is held every two years and is currently being hosted by the CAST Cooperative Research Centre with the support of the aluminium industry. The objectives of the conference are:

• To present material on the latest developments in industry production trends, cast house equipment, processes, technology, alloys, products, safety, markets and management, giving particular attention to environmental issues facing the industry
• To broaden the training of engineers and scientists involved in melting and casting technologies
• To provide ample opportunity for discussion on topics of common concern to cast houses and foundries so that ideas can be generated and solutions canvassed
• To provide a common meeting ground for cast house supervisors, managers, material and technology suppliers and international experts for discussions on various aspects of aluminium melt treatment and casting