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碳化物不均匀性是高速钢的重要特征。要保证复杂刀具的标准耐用度,如加工高碳钢和合金的螺纹成形铣刀,其碳化物不均匀性不得超过2～3级。但在供售状态下的高速钢,只有直径为20～40毫米的小圆片才能满足这样的要求。直径为80～100毫米的棒料,其碳化物不均匀性达6～7级。为降低碳化物不均匀性等级,基本上采用自由锻造,但不能经常达到理想的效果。采取等温形变方法可使高速钢的塑性得以显著地提高。在压力机的一
Carbide non-uniformities are an important feature of high speed steels. To ensure the standard tool life of complex tools, such as the processing of high carbon steel and alloy thread forming cutter, the carbide unevenness shall not exceed 2 to 3 levels. However, in the sale of high-speed steel, only the diameter of 20 to 40 mm of the small wafer to meet this requirement. The diameter of 80 to 100 mm bar, carbide unevenness of 6 to 7 levels. In order to reduce the level of carbide inhomogeneity, free forging is basically used, but the desired effect can not often be achieved. To take isothermal deformation method can make high-speed steel plastic can be significantly improved. One in the press