论文部分内容阅读
目前各螺纹刀具生产厂在执行国标中,由于小丝锥的长度增加,如何控制淬火变形,一直是热处理中难于解决的问题。对于用9SiCr,T12、GCr15材料制造的小丝锥,各厂普遍采用淬火前和淬火后两次校直的工艺方法,该校直工艺出现了重复。由于淬火、回火以后冷(热)校直,只能校正丝锥的柄部,而螺纹部分的变形是难以校正的。影响丝锥寿命的主要原因是由于螺纹部分的弯曲,造成切削扭矩加大,螺纹崩刃或折断,经常给用户造成不同程度的损失。为了防止淬火变形。我们对M3—6小丝锥淬火变形的原因进行了分析,经过反复试验,较好地解决了淬火变形问题,并取消了淬火后的校直工序。
At present, all thread cutter manufacturers in the implementation of the national standard, due to the increase in the length of the small tap, how to control the quenching deformation, heat treatment has been difficult to solve the problem. For small taps made of 9SiCr, T12, GCr15 materials, the factory commonly used two straightening process before quenching and after quenching, the straightening process has been repeated. Due to quenching, tempering after cold (hot) straightening, only the handle of the tap can be corrected, and the deformation of the thread portion is difficult to correct. The main reason that affects the life of the tap is that due to the bending of the thread part, the cutting torque is increased, and the thread collapses or breaks, often resulting in different degrees of loss to the user. In order to prevent quenching deformation. We analyzed the reason of M3-6 small tap quenching deformation, after repeated tests, it solved the problem of quenching deformation well and canceled the straightening process after quenching.