Under the condition that the cost increases little, the complex heat_treatment can make it possible to greatly improve the heat_treatment performance of tap by making full use of the current equipments and mature heat-treatment crafts.

• 本文提出 ,在成本增加不多的条件下 ,通过复合热处理的方法 ,可以充分利用现有设备和成熟的热处理工艺 ,大幅度地提高丝锥的热处理性能。