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热处理电阻炉应用的发热体除少部分用硅碳棒以外,大部分用的是铬铝合金(1Cr17A15、OCr25A15等)和铬镍合金(Cr15Ni60、Cr20Ni80等)。由于热处理电阻炉的普遍应用,因而对电热合金的需用量日益增加。因此,应进行合理的设计,充分发挥电热元件的效用,节约材料,降低成本。目前各厂使用的热处理电阻炉的构造型式和尺寸大小各不相同,对电热元件的使用要求也不同。通常是以一整根或几根为一组,组成若干组分布于炉膛的两侧、炉底和炉顶;有时也分布在炉门上和后墙上。井式电阻炉,则电热元件分布于四周或炉底。较小尺寸的电阻连续马弗炉和
Except for a small part of silicon carbide rods, most of the heating elements used in heat treatment resistance furnaces are made of chrome-aluminum alloy (1Cr17A15, OCr25A15, etc.) and Cr-Ni alloy (Cr15Ni60, Cr20Ni80 etc.). Due to the widespread use of heat-treating resistance furnaces, the amount of electric heating alloy required is increasing day by day. Therefore, should be reasonable design, give full play to the effectiveness of electric components, saving materials, reduce costs. At present, the heat treatment resistance furnace used by the factory structure type and size vary, the use of electric heating elements are also different. Usually a whole or a few as a group, composed of several groups distributed in the furnace on both sides, bottom and top of the furnace; sometimes distributed in the furnace door and the back wall. Pit type resistance furnace, the heating elements are distributed around the hearth or bottom. Smaller size resistors for continuous muffle furnaces and