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一把锉刀的制造要经过锉坯成型、退火、光坯加工、刴齿、淬火等十几道工序。其中退火工序对刴齿和淬火的质量影响很大,因为钢材经过锻、轧成锉坯后,锉坯的金相组织为细片状珠光体,这种组织对淬火是不利的,再就是产生了內应力。所以要通过退火来改善组织,消除內应力,以提高锉刀的使用性能。锉刀毛坯退火时,除了满足以上两个要求外,还要求其表面层最好不脱碳。否则,不是浪费材料和加工工时,就是锉刀在淬火后表面达不到规定的硬度,而造成废品。
A file to go through the rasp file forming, annealing, light billet processing, fangs, quenching more than a dozen procedures. In which the annealing process on the quality of teeth and quenching a great impact, because the steel after forging, rolling into the rasp, the rasp of the microstructure of fine flake pearlite, this organization is detrimental to quenching, and then there is produced Internal stress. So to improve the organization by annealing to eliminate the stress, in order to improve the use of the file performance. RIG blaze annealing, in addition to meet the above two requirements, but also requires the surface layer is not decarbonization. Otherwise, not waste materials and processing time, that is, the file after quenching the surface does not meet the required hardness, resulting in waste.