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在离子渗氮中,由于某些原因,使辉光放电变为弧光放电,而将影响正常渗氮过程的进行。因而,必须在电源及炉体阴极结构上采用防弧及灭弧措施,以维持正常的辉光放电。常用的阴极结构,由于绝缘材料组织疏松,含有夹杂物、粘结剂及一定的水分,当温度升高时,便产生放气现象,在阴极附近产生高压的薄层气团,加之与阴极接触的表面不平整、不光洁,因而在渗氮过程中受到正离子的冲击易造成弧光放电。目前,国内外在离子渗氮炉阴极与绝缘
In ion nitriding, for some reason, the glow discharge into arc discharge, which will affect the normal nitriding process. Therefore, it is necessary to adopt arc-proof and arc-extinguishing measures on the power supply and the cathode structure of the furnace body in order to maintain the normal glow discharge. The commonly used cathode structure, due to the loose structure of the insulating material, contains inclusions, adhesives and a certain amount of moisture, when the temperature rises, they produce deflated phenomenon, in the vicinity of the cathode to produce high pressure thin air masses, coupled with the cathode contact The surface is not smooth, not smooth, so in the process of nitriding positive ions easily lead to arc discharge. At home and abroad in the ion nitriding furnace cathode and insulation