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薄盘形刀具毛坯的结构特点是直径与厚度的比例悬殊大(D/H=6～50)。采用一般的锻造和热模锻方法可制出D/H 之比不大于6、4的盘形铣刀毛坯,这是由于高速钢塑性较低,变形抗力大以及有氧化和脱炭等趋势所致。从高速钢钢板冷冲下的坯料来制造锯片铣刀毛坯时,金属的利用率低,留下的废料多,而由热轧棒料用自由锻造方法制造盘形模数铣刀毛坯,因其下一序的机加工留量大(一边为.5～2毫米)以及出现裂纹废品等原因,造成金属大量损耗,甚至于有烧损、氧化皮和脱炭层等损耗。此外,自由锻造后必须在专用炉内进行较长时间的退火,退火炉的电能消耗量较大,所占的生产面积也很大。
Structural characteristics of the disc-shaped tool blank is a large proportion of the diameter and thickness (D / H = 6 ~ 50). General forging and hot forging method can be made D / H ratio of not more than 6,4 disc cutter blank, which is due to the high-speed steel low plastic deformation resistance as well as the trend of oxidation and decarbonization To In the production of saw blade mill blanks from cold-blanked blanks of high-speed steel plates, the utilization of the metal is low and the amount of scrap left is high, whereas the disc-shaped tool blanks are produced by free-forging from hot-rolled bar stock due to The next big machining allowance (on the one hand is .5 to 2 mm) and crack scrap and other reasons, resulting in a large number of metal loss, and even loss, scale and carbon off the loss. In addition, the free forging must be carried out in a dedicated furnace for a longer time annealing, annealing furnace power consumption is larger, the production area is also very large.