The effect of silicon and aging on mechanical properties and fracture response of drawn high-strength pearlitic steel wire

摘要

Wires with patented and cold drawn pearlitic microstructures and strength levels of 1950 MPa and 2250 MPa were made from steel containing 0.9 wt pct C and either 0.23 wt pct Si or 1.30 wt pct Si and aged at temperatures between 350 and 500 deg C for various times. Aging increased strength and reduced ductility, but strength increases and resistance to spheroidzatlon were greater in the high Si wires.