An Excellent Superplastic Die Steel——High Carbon Steel Containing Cr and Si

High carbon steel containing Cr and Si is designed by lowering carbon content level in ultrahigh carbon steel and adding Cr and Si to it.This steel has of excellent superplasticty and other properties.
Compared with other superplastic steels, this steel can keep the superp-tasticity at much higher strain rate(>0.49/min) and can be superplasticity formed more quickly.Because of its wide plastic range of temperature(>150K), 1his steel can be used to form parts in industry conveniently.Its forming stress is low and the superplastic fine grain is easy to be produced.
Otherwise, this steel is of good hardenability and its mechanical properties at ambient temperature is better than some die steels (eg.9CrSi steel).