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据一些资料介绍,当孔长比孔径>8:1时,必须加内孔辅助阳极。但是我们一年多的生产实践表明,当孔长与孔径比大大超过这一比例时,不加辅助阳极,内孔与外表面氮化质量没有发现显著差别。从辉光放电理论分析也表明,加与不加辅助阳极,内孔表面阴极区的电位降及电流密度不会受到明显影响。
According to some information, when the hole length ratio aperture> 8: 1, you must add a hole to assist the anode. However, our more than one year of production practice shows that when the ratio of the length of the hole to the aperture ratio greatly exceeds this ratio, there is no significant difference in the quality of the nitriding between the inner hole and the outer surface without the auxiliary anode. From the glow discharge theoretical analysis also shows that, with and without ancillary anode, the inner surface of the cathode area potential drop and current density will not be significantly affected.