Development of hypoeutectoid graphitic steel for wires

摘要

Hypoeutectoid graphitic steels with BN as prime nucleating site for graphite nucleation were developed for improvement of drawability of wires. Al2O3 also acted as nucleation site for graphite. The steel chemistry has played an important role for BN formation and thus dictated the behaviour of graphite formation and tensile properties after graphitising annealing. The steels are with a low yield ratio of ∼0·5 while percentage elongation is in the range of 23-25% and percentage reduction in area is in the range of 45-51%.