Γ—30型高温箱式电炉的电热棒共有六组,每组由一根φ25×540和两根φ25×340的碳化硅棒组成,采用双星形接法,如图1。这种电炉在使用当中,常常在碳化硅棒的接头处出现熔渣,使接触处电阻增加,局部产生高热,而且炉子的升温时间大大延长了;因此必须时常把它拆下,把熔渣磨去。这些熔渣坚硬得很,很难磨掉。而碳化硅又是硬而脆的材料,过多的拆装常会断裂而报废。为此,我们研究 Γ-30-type high-temperature electric furnace oven a total of six groups, each group consists of a φ25 × 540 and two φ25 × 340 silicon carbide rods composition, the use of double star connection, shown in Figure 1. This kind of electric stove is used, often appears in the silicon carbide stick joint slag, so that the contact resistance increases, the local heat, and the stove greatly extended heating time; it must often remove it, the slag mill go with. These dross is hard and hard to wear off. The silicon carbide is hard and brittle material, too often disassembly and disruption and scrapped. To this end, we study