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在1981年全国锉刀质量评比中,我厂生产的钢锉在表面齿锋、齿根硬度和切削性能三项指标上均获得较好分数,主要是我们对锉刀淬火的方法进行了改进。目前,国内大部分工厂都是在外热式盐浴炉中加热。有的在盐浴炉中放支架,操作者把钢锉放在支架中,由一边到另一边循环进出;有的吊一固定托锉架,绕圆周轮流进出。这样,每支锉刀在盐中加热时间不可能完全
In 1981, the national file quality assessment, I plant the production of steel files on the surface tooth front, root hardness and cutting performance of the three indicators were better scores, mainly because we file on the method of improvement has been improved. At present, most of the domestic factories are heated in an external thermal salt bath furnace. Some put the bracket in the salt bath furnace, the operator put the steel file on the bracket, circulated from one side to the other side; some hang a fixed file holder, around the circular rotation in and out. In this way, every rasp can not be completely heated in salt