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Metal Casting Technologies : June 2007
the interaction between β-Al5FeSi and crumpled double oxide films has revealed that this phase can nucleate on the films causing them to separate thus forming crack-like defects that significantly reduce tensile properties . Recent work at Chulalongkorn University has focused on the use thermodynamic and other models to study solidification sequences in Al Alloys and to improve understanding of continuous casting [13-15]. With support and cooperation from the Nikkei Research Centre of the Nippon Light Metal Co. Ltd. in Japan one of the problems being tackled is the prevention of hot tears in high strength Al-Zn-Mg Alloys that have potential for use as formed automotive parts. It has been found that continuous casting under the application of a low frequency electromagnetic field can produce ingot material with refined and uniform grain sizes and freedom from hot tearing . OPTIMIZING MECHANICAL PROPERTIES IN WHEELS During the past year MTEC has been involved in a research project with Siam Lemmerz Co. Ltd. based in Saraburi to optimize compositions, casting and heat treatment conditions in the production of low pressure die cast Al Alloy wheels. Siam Lemmerz is one of twenty or so Al wheel producers in Thailand. The Saraburi plant has 30 LP diecasting machines with an annual production capacity of around 1.5 millions wheels and is part of the Hayes Lemmerz International Group. The aim of the work is to obtain the optimum balance of strength, fatigue resistance, ductility and toughness in A356 (Al-Si-Mg) LP die-cast wheels. Mechanical property data from a design of experiments based study is currently being analyzed in relation to Si, Mg, Ti, Sr and Fe levels and to solution Figure 1: Dr. Chairuangsri (far left) and researchers performing TEM characterization studies at the Electron Microscopy Research and Service Centre in the Faculty of Science at Chiang Mai University. The instrument is a JEOL JEM2010 200kv transmission electron microscope fitted with micro- analysis equipment. Current projects on cast Al alloys include work on semi- solid processed alloy and studies of precipitation in heat treated A356 Alloy 17 PACIFIC RIM FOUNDRY SERVICES Exclusive Representative for Mancuso Chemicals (Canada) in Australia and Southeast Asia Chemical Binder Systems State of the Art Technology at Competitive Prices Furane Resins and Catalysts Phenolic Urethane No-Bake Binders Phenolic Urethane Cold-Box Binders PACIFIC RIM SAFETY PRODUCTS Marketing safety products from: Paramount Safety, Elliott Australia, Protective Industrial Products, Defender Safety, Australian Safety, Bacou Dalloz, Livingstone International. Safety Equipment Leather Gloves,Cotton Gloves,Terry Cord Gloves, Welding Gloves & Aprons, Ear plugs, Safety Glasses, Respiratory Masks, Furnace Clothing, High Visibility Clothing, Disposable Overalls, Work Jackets, Safety Boots & Shoes PACIFIC RIM FOUNDRY EQUIPMENT Buying and Selling Second Hand Foundry Equipment Foundry Equipment Asset Liquidations Pacific Rim Foundry Services Pacific Rim Safety Products Pacific Rim Foundry Equipment Tel:61 2 8883 2997 Fax:61 2 8883 2895 Mobile 0419 433 238 Email:email@example.com METAL Casting Technologies June 2007