关于感应淬火层深度测量方法的讨论

Analysis of Measurement Method of Induction Hardening Depth

针对某农机主要轴类零件,经感应淬火后,对淬火层深度的测量,一般采用硬度法测量感应淬火层深度,即有效硬化层法来作为仲裁的方法。通过大量试验发现,有效硬化层法在测量感应淬火层深度时存在一定程度的测量盲区,采用金相法时可避免盲区出现,使用不同种类的硬度计会出现不同结果,极限硬度值越高,偏差越大;对于带状组织感应淬火层深度的测量,两种方法仍存在不足。

The main method to arbitrate the depth of induction hardening layer of some shaft parts in the agricuhural machinery is effective hardening layer method. The method is to measure the depth of induction hardening layer with the hardness method. According to the composite analysis of lots of experiments,some shadow zones can be found when the depth is measured by the hardness method. The shadow zones can be avoided with the metallographic method. Lots of studies show that different results can be obtained with different methods. The deviation will be greater as the ultimate hardness grows. The two methods still have some defects when measuring the depth of induction hardening layer of some shaft parts with banding structure.