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木工圆锯片一般用T7A、T8A和65锰钢来制造。中温回火后,要求达到屈氏体基体和少量索氏体的金相组织、硬度HRC44～48、变形度(凹凸量/锯片直径)达到0.1～0.3％。在厚度较薄的条件下,要具有良好的刚度和轫性,以利锯割和节省木材。制造这种锯片的主要关键是热处理工艺,要求热处理后没有变形并须达到硬度要求。这在大型锯片热处理时,更加困难。我们在党支部领导下,贯彻三结合,解决了大型锯片的热处理工艺。现将我们的一些做法介绍于下。锯片热处理有下列几种方法。 1.锯片在电阻炉中卧式加热,垂直放入油池冷却。淬火后,将锯片夹紧放入电阻炉或硝盐炉内回火,
Woodworking circular saw blades are generally made of T7A, T8A and 65 manganese steel. After tempering at medium temperature, the microstructure of the troostite base and a small amount of sorbite should be reached with a hardness HRC of 44-48 and a degree of deformation (bump / saw blade diameter) of 0.1-0.3%. In the thin conditions, to have good stiffness and flexibility, to facilitate sawing and save wood. The key to manufacturing this saw blade is the heat treatment process that requires no deformation after heat treatment and must meet the hardness requirements. This is more difficult when large saw blades are heat treated. Under the leadership of the Party branch, we have implemented the three principles to solve the heat treatment process of large saw blades. Now we introduce some of the practices below. There are several ways to heat saw blade. 1 saw blade in the resistance furnace horizontal heating, vertical into the oil pool cooling. After quenching, the saw blade into the resistance furnace or nitrate salt furnace tempering,