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电极式盐浴炉具有结构简单,维修方便,加热工件快,氧化脱碳少,便于进行局部加热等优点,因而,至今仍在热处理生产中广泛采用,据统计约占热处理设备的百分之二十五。但盐浴炉启动时无功电耗大,即每次启动需外来热源熔化极间固态盐才能导通,以及为了避免启动耗时过长,短时停炉采用低压供电保温;升温慢,时间长,工作条件差。近年来,盐浴炉改造在不断进展,一九七九年起不少工厂将插入式电极改为埋入式,扩大了炉膛使用
Electrode salt bath furnace has the advantages of simple structure, convenient maintenance, quick heating of workpiece, less oxidation decarburization, easy local heating, etc. Therefore, it is still widely used in heat treatment production to date, accounting for about 2% of the heat treatment equipment fifteen. However, when starting the salt bath furnace, the reactive power consumption is large, that is, each time the start-up requires the external heat source to melt the solid salt between the electrodes to be turned on, and in order to avoid the starting time being too long, the low- Long, poor working conditions. In recent years, the transformation of the salt bath furnace is making continuous progress. Since 1979, many factories have changed the plug-in electrode to a buried type and expanded the use of the hearth