| 摘要 |
Austempered steel for components requiring high strength and/or ductility, which has a silicon content of 3.1 weight-% to 4.4 weight-% and a carbon content of 0.4 weight-% to 0.6 weight-%. The austempered steel is obtained by austempering heat treatment including complete austenitization at a temperature of at least 910°C, whereby the higher the silicon content of the steel, the higher the austenitization temperature. The resulting microstructure of the austempered steel is ausferritic or superbainitic. |
