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拉刀、钻头等长杆高速钢工具淬火后的校直方法,一般采用热校,即淬火时油冷至300～400℃时由油中取出,此时工件温度比较高,还存在着大量奥氏体,人们就利用奥氏体的良好塑性进行校直。这是目前国内外较为普遍采用的高速钢工具的校直方法。但是它有一定的缺点,即劳动条件差,同时在校直过程中工件温度不断下降,马氏体量不断增加,若不及时校直,则在较低温度校直就难于进行,甚至压断,工件的质量难以保证。在长期生产实践
Broach, drill and other long rod high-speed steel tools after straightening method of calibration, the general thermal school, that is quenching oil cooling to 300 ~ 400 ℃ removed from the oil, the workpiece temperature is relatively high, there are still a large number of Austrian The body, people use good plastic austenitic alignment. This is the most commonly used high-speed steel tools at home and abroad straightening method. However, it has some shortcomings, that is, poor working conditions, while in the process of straightening the workpiece temperature continues to decline, increasing the amount of martensite, if not straightened, the straightening at lower temperatures is difficult to carry out, or even pressure , The quality of the workpiece is difficult to guarantee. In the long-term production practice