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我厂制造的T10A钢冷冲模具(如图1、2所示)的生产工艺是:锻造(三火)→退火→机械加工→压印下模,钳工加工修磨刃口部位(留0.03mm的淬火变形量)→淬火及回火→终修磨刃口部位。因热处理淬火变形大或无规律,给终修磨刃口带来困难,影响模具精度,模具间隙不均或大,降低模具使用寿命。改进的工艺是将锻后退火改为余热空冷,即锻造终锻温度为850℃,空气预冷到750～770℃,锻件颜色为暗樱红色,然后淬入5～10%的盐水溶液急剧冷却,试件冷却不超过2min,于500～550℃颜色为棕红色
I plant manufacturing T10A steel die (shown in Figure 1,2) production process is: forging (three fire) → → annealing → machining die embossed, fitter trim grinding edge (leaving 0.03mm Quenching deformation) → → quenching and tempering → final repair grinding edge parts. Large deformation due to heat treatment quenching or irregular, to the final repair grinding edge difficult, affecting the accuracy of the mold, uneven or large mold gap, reducing mold life. The improved technology is to change the forging annealing to residual heat air cooling, that is, the forging final forging temperature is 850 ° C, the air is precooled to 750 ° C to 770 ° C, the forging has the color of dark cherry red, and then quenched into 5 to 10% brine solution for rapid cooling , Specimen cooling no more than 2min, at 500 ~ 550 ℃ color is brown red