An Excellent Superplastic Die Steel——High Carbon Steel Containing Cr and Si
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摘要: 適當降低超高碳鋼的含碳量,并加入一定量的鉻和硅,可以得到一種具有優良的超塑性能和其它工藝性能的高碳鉻硅鋼。
同其它超塑性鋼相比,這種鋼的超塑性形變速率很高(>0.49min-1),這將大大提高超塑性成形的速度;該鋼超塑性成形的溫度區間達150K以上,這將給超塑性成形的工業化應用帶來極大便利;此外,這種鋼的超塑性形變抗力低;超塑性組織的制備十分簡便;該鋼的淬透性和淬硬性都很好,室溫力學性能優于9CrSi;等模具鋼。因此,這種鋼可作為超塑成形的模具鋼使用。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). -
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