论文部分内容阅读
钢件的表面淬火,是在它的表面形成很薄的一层提高硬度的淬硬层,藉以增加表面的耐磨性。表面淬火是由两步主要操作组成:(1)将很薄的金属层加热到淬火的温度;(2)接着便进行淬火。激冷的操作一般不会发生特殊的困难。比较复杂的是加热操作,因为只有高强度的热源才能保证迅速地将表面层在内层尚未有显著地热透之前加热到淬火温度。在我们工厂中实际使用的是高週波电流和氢氧焰。电弧放电很早就被认为有可能用作为表面淬火的热源。不久以前,应用它的试验还不能达到令人满意的结果。直接作用的电弧,构成电弧的一个电极是金属。这样,几乎在一刹那间金属的表面就熔
Surface hardening of steel is in its surface to form a thin layer of hardened layer to increase the hardness, in order to increase the wear resistance of the surface. Surface hardening consists of two main steps: (1) a thin layer of metal is heated to the quenching temperature; (2) the quench is followed. Chilled operation generally does not occur special difficulties. More complicated is the heating operation, as only a high-intensity heat source ensures rapid heating of the surface layer to the quenching temperature before the inner layer has not been significantly hot-tempered. The actual use of high-frequency current and oxyhydrogen flame in our plant. Arcing has long been considered as a potential heat source for surface hardening. Not long ago, the test using it failed to achieve satisfactory results. Directly acting arc, one of the electrodes that make up the arc is metal. In this way, the metal surface melts almost instantaneously