Development of electric steels

• Grant number: 95/03988-7
• Support Opportunities: Research Grants - Research Partnership for Technological Innovation - PITE
• Start date: March 01, 1996
• End date: February 28, 1997
• Field of knowledge: Engineering - Biomedical Engineering
• Principal Investigator: Fernando Jose Gomes Landgraf
• Grantee: Fernando Jose Gomes Landgraf
• Host Institution: Instituto de Pesquisas Tecnológicas S/A (IPT). Secretaria de Desenvolvimento Econômico (São Paulo - Estado). São Paulo , SP, Brazil
• Company: Companhia Siderúrgica Nacional (CSN)
• City: São Paulo

Abstract

The innovations expected from this project were aimed at establishing the technology for the manufacture of two new kinds of steels for electromagnetic purposes, combining the experience of researchers from CSN - Companhia Siderúrgica Nacional and of the IPT - Institute of Technological Research. The characteristics of the two groups that were the objective of this project - Type of steel: high loss; Stage: certification; Losses (W/kg) 1.5 t/60 Hz/0.5 mm: 7.5; Permeability (B50(t)): 1.78. Type of steel: medium loss; Stage: exploratory; Losses (W/kg) 1.5 t/60 Hz/0.5 mm: 5.8; Permeability (B50(t)): 1.74. The project provided for the experimental investigation of the effect of some variables in the processing on the magnetic properties of the steel sheets, with the aim of attaining the above mentioned values of electrical losses and magnetic permeability. Steel with better magnetic properties leads to electric motors that perform better. Support from FAPESP made it possible to construct a system of magnetic measurements and to add new competencies to the teams from the IPT (a new methodology of magnetic testing, the “separation of losses”), widening the range of services that the institute can offer and giving the team deeper insight into the relations between processing, microstructure and magnetic properties. (AU)