Structure and properties of high-strength cast iron with a bainitic structure

Abstract

1. In high-strength iron castings up to 60 mm in diameter it is possible to obtain a bainitic structure in the metallic matrix by alloying with 2% Ni and 0.6% Mo. 2. Nickel (1.4–1.8%) and molybdenum (0.5–0.6%) alloyed high-strength iron with a bainitic-pearlitic structure in the as-cast condition has σt=700−780 MPa,an=0.1 MJ/m2, and δ ∼1.5%. 3. Tempering of high-strength iron with a bainitic structure at 630°C for 2 h causes a decrease in hardness to values making subsequent machining possible and provides high mechanical properties of σt≥800 MPa,an≥0.3 MJ/m2, and δ≥3.5%.