一种优良的超塑性模具钢——高碳铬硅钢

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

摘要: 适当降低超高碳钢的含碳量,并加入一定量的铬和硅,可以得到一种具有优良的超塑性能和其它工艺性能的高碳铬硅钢。
同其它超塑性钢相比,这种钢的超塑性形变速率很高(>0.49min^-1),这将大大提高超塑性成形的速度;该钢超塑性成形的温度区间达150K以上,这将给超塑性成形的工业化应用带来极大便利;此外,这种钢的超塑性形变抗力低;超塑性组织的制备十分简便;该钢的淬透性和淬硬性都很好,室温力学性能优于9CrSi;等模具钢。因此,这种钢可作为超塑成形的模具钢使用。

Abstract: 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).