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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。
By properly reducing the carbon content of ultra-high carbon steel and adding a certain amount of chromium and silicon, a high-carbon chromium-silicon steel with excellent superplasticity and other process properties can be obtained. Compared with other superplastic steel, the superplastic deformation rate of this steel is very high (> 0.49min ~ (-1)), which will greatly improve the superplastic forming speed; the temperature range of the steel superplastic forming reaches above 150K , Which will bring great convenience to industrial applications of superplastic forming; In addition, the superplastic deformation resistance of this steel is low; the preparation of superplastic structure is very simple; the hardenability and hardenability of this steel are very good; the room temperature Mechanical properties better than 9CrSi; and other die steel. Therefore, this steel can be used as super-plastic mold steel.