一、热处理3Cr2 W8热锻模钢的淬火温度长期以来都倾向于选用1050～1100℃(理由是过高的淬火温度将造成塑性降低)。在这种温度下淬火,再经过560℃回火处理,其硬度为HRc42～46。我们在生产实践中发现,这样处埋的模具,其强度及耐磨性均较差,使用不久即发生模面棱角磨损及局部凹陷等,从而使模具报废。在300吨摩擦压力机上锻压钢丝钳毛坯,一般锻压坯件不超过3000件。我们在毛泽东思想指导下,破除迷信,解放思想,进行试验,把淬火温度提高至1120～1140℃,经560℃回火后,硬度为HRc51～53。这时,模具的耐热性显著增加,强度及耐磨性均有所提高。因而模具寿命大大提高,一股可锻压坯件10000件左右,比旧工艺 First, the heat treatment 3Cr2 W8 hot forging die quenching temperature has long tended to use 1050 ~ 1100 ℃ (reason is too high quenching temperature will result in plastic reduction). Quenching at this temperature, followed by tempering at 560 ℃, the hardness of HRc42 ~ 46. We found in the practice of production, such a place buried mold, its strength and wear resistance are poor, the use of short-term occurrence of surface-type angular wear and local depression, so that the mold scrapped. In 300 tons friction press forging wire clamp rough, generally not more than 3000 forging blank. Under the guidance of Mao Zedong Thought, we have got rid of superstition, emancipated our minds and experimented. The quenching temperature was raised to 1120 ~ 1140 ℃. After tempering at 560 ℃, the hardness was HRc51 ~ 53. At this time, the mold significantly increased heat resistance, strength and wear resistance have improved. Die life greatly increased, a malleable blank about 10,000 pieces, than the old process