Development of technology of production and improvement to mechanical properties of high silicate cast iron

• Grant number: 02/12968-5
• Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE
• Start date: January 01, 2004
• End date: April 30, 2007
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Transformation Metallurgy
• Principal Investigator: Omar Maluf
• Grantee: Omar Maluf
• Company: Fultec Inox Ltda
• City: São Carlos

Abstract

High silicate cast irons are basically ternary alloys Fe-C-Si (iron-carbon-silica), recommended for applications which demand high resistance to corrosion, a characteristic obtained by the formation of a protective film of hydrated silica oxide on the surface of the component. This resistance improves when the silica content is increased. However, the mechanical properties are proportionally impaired by this increase. The low mechanical resistance of this material, when compared for example, with common cast iron, is responsible for its limited use. To carry out the first phase of this project an alloy based on the cast iron in question was selected, from which three different metal alloys were produced - by the addition of new alloying elements in different percentages -, with which the experiments will be carried out. The base alloy will be composed of Carbon, Silica, Manganese, Phosphorus and Sulfur. In phase 1 of the project, two alloys of different chemical compositions offered the best results for mechanical resistance and toughness. These alloys will be characterized by means of corrosion and wear tests at environmental temperature; bending, traction and conventional impact tests at high temperature; and instrumented impact tests at environmental and high temperature. (AU)