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关于齿轮沿齿廓外缘淬火问题,在国内外已进行过大量的研究工作,国外有的已经获得了专利,国内有的单位也取得了一定的成果.但是,有关中模数齿轮(M=5～7)的沿齿廓外缘淬火问题,却一直未曾得到解决.目前,仍然广泛采用全齿高频淬火和沿轮齿工作表面单齿淬火等方法,但用这些方法淬火的齿轮的使用寿命是极短的,我们的实践也证实了这一点.如卫星内燃机车第三辅助传动轴齿轮由40Cr钢制成(M=5,Z=49),尽管负荷不大,但用全齿法淬火后,只运行了5000公里就发生了“拔牙”现象(图1a);图1b为该齿轮断面上的硬度分布情况. 根据上述情况,我们共同协作,对中模数齿轮沿齿廓外缘高频淬火进行了试验研究.多次试验表明,这种方法不仅能沿齿廓外缘获得均匀的淬硬层,而且
With regard to the problem that the gears are quenched along the outer edge of the tooth profile, a great deal of research work has been carried out at home and abroad, and some foreign countries have already obtained the patent and some domestic ones have also achieved some achievements. However, 5 ~ 7) along the outer edge of the tooth profile quenching, but has never been resolved.At the present, is still widely used in all-gear high-frequency quenching and along the gear tooth surface single-tooth quenching methods, but the use of these methods to quench the use of gear Life is extremely short, our practice also confirmed this point.Such as satellite diesel locomotive third auxiliary drive shaft gear made of 40Cr steel (M = 5, Z = 49), despite the load is not large, but with full tooth method After quenching, the phenomenon of “tooth extraction” occurred only for 5000 km (Figure 1a). Figure 1b shows the distribution of hardness on the section of the gear. According to the above situation, High-frequency quenching experiments were carried out.Many tests show that this method can not only get a uniform layer along the outer edge of the hardened layer, and