温锻的温度范围介于室温和热锻的下限之间。温锻的概念初为采用时,工件预热温度一般倾向于略高于室温,使通常的磷化—皂化润滑剂仍然能够应用。但是,流动应力的减小往往并不明显,有时发现还有所增加,结果就较高的温度作了尝试。温锻件的主要特征是基本上保持了冷锻件的尺寸精度和表面质量,这意味着锻件的表面氧化应该是微乎其微的。如果加热温度不超过800℃,加热时间又不长,甚至在空气中加热 Warm forging temperature range between room temperature and the lower limit of hot forging. When the concept of warm forging is adopted initially, the preheating temperature of the workpiece generally tends to be slightly higher than room temperature, so that the usual phosphated-saponified lubricant can still be applied. However, the reduction of the flow stress is often not obvious, and sometimes it is found that there is an increase. As a result, higher temperatures are tried. The main feature of warm forging is that the dimensional accuracy and surface quality of the cold forgings are basically maintained, which means that the surface oxidation of the forgings should be negligible. If the heating temperature does not exceed 800 ℃, the heating time is not long, even in the air heating