钢的冷挤使模具的许用应力超过了极限。对于在室温下不能挤压加工或很难挤压加工的工件材料,如果提高温度挤压成形(温挤—译者注)就可以扩大钢挤压的应用范围。用挤压的两种基本方法即实心正挤和空心反挤,在温挤时就毛坯温度,工件材料和变形程度对所需挤压力与功的影响进行讨论。 Cold extrusion of steel allows the allowable stress of the mold to exceed the limit. For work-piece materials that can not be extruded at room temperature or difficult to extrude, the range of applications for steel extrusion can be expanded with increased temperature extrusion. The two basic methods of extrusion, solid positive extrusion and hollow anti-extrusion, are discussed in terms of the temperature of the blank, the material of the workpiece, and the degree of deformation of the product during extrusion.