Hypoeutectic aluminum alloys such as A356.0 (Al-7Si-0.3Mg) are usually subjected to strontium additions in order to obtain a chemically modified eutectic morphology. The modification of the eutectic silicon from sharp acicular plates to a fibrous structure is normally applied to improve the alloy ductility. However, strontium additions are relatively costly […]
Alloys
The design freedoms inherent in investment casting help keep aluminum metal matrix composites cost effective. Paul Mikkola, Retired, Hitchiner Manufacturing, Milford, New Hampshire, and Bruce Willson, O’Fallon Casting, O’Fallon, Missouri The particulate silicon carbide reinforcement in aluminum alloy metal matrix composite (MMC) enhances this lightweight material with improved mechanical property […]
Investment Casting Metal Matrix Composites
1 The microstructure of austempered ductile iron (ADI) is composed of needle ferrite and carbon-enriched austenite, called ausferrite. ADI has excellent comprehensive mechanical properties, obtained by changing the chemical composition, austenitizing temperature and holding time, and austempering temperature and holding time. A lot of attention has been paid to the production […]
Research and Application of Carbidic Austempered Ductile Iron
Chromalloy is expanding its investment casting foundry in Tampa, Fla., to include a master alloy operation. “Chromalloy’s new vacuum induction melting furnace will be fully operational in December 2013 at our state-of-the-art investment foundry,” said Carlo Luzzatto, president. “Over the next 90 days we will meet the manufacturing requirements to […]
Chromalloy Expands to Produce Master Alloy Ingots
Alcoa, New York, U.S., announced plans to close or curtail 164,000 metric tons of smelting capacity in the United States and Brazil as part of its smelting capacity review. “We committed in May to review our global smelting capacity for possible curtailment to maintain the company’s competitiveness,” said Bob Wilt, […]
Alcoa to Close or Curtail 164,000 Metric Tons of Smelting ...
Elkem’s recently introduced cover alloy, Topseed®, is changing the way that our customers think about their magnesium ferrosilicon treatment process. Designed to, Improve magnesium recovery Conditions the reaction slag Increase residual nucleation levels Improve process stability, Topseed® has already proved to be a great benefit in many foundries across North […]
Cover Alloy Improves Ductile Iron Production
Elkem introduces “Topseed® cover alloy” – another great step forward in reducing magnesium addition and lowering production costs in ductile iron foundries. The use of magnesium ferrosilicon (MgFeSi) to nodularise cast irons is a significant cost for ductile iron foundries. That is why Elkem has developed Topseed® as a new […]
Topseed® – Elkem leads the way in offering attractive cost ...
1 Magnesium containing reaction products from ductile iron treatment are a potential source for inclusion defects in ductile iron. Your local Elkem team will assist you to choose the right MgFeSi alloys for your process and this will help in minimising these defects and thus reduce scrap rates. Slag inclusions are […]