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前言从广义来说,凡被加热材料中含碳量大于0.05%的各种工艺过程,均可在石墨管电阻炉中进行。例如,硬质合金和钢结硬质合金的真空烧结;各种碳化物(如 TiC、NbC、TaC)及其固溶体(WC—TiC)的真空碳化;碳热还原法生产铌和钽……等均可在真空石墨管电阻炉中进行。由于石墨价格便宜、易于加工、高温强度好、工作温度高、热膨胀系数小等一系列优
Foreword In a broad sense, all processes that contain more than 0.05% carbon in heated materials can be carried out in a graphite tube resistance furnace. For example, vacuum sintering of cemented carbide and cemented carbide cements; vacuum carbonization of various carbides such as TiC, NbC, TaC and their solid solutions (WC-TiC); production of niobium and tantalum by carbothermal reduction and the like Can be carried out in a vacuum graphite tube resistance furnace. As graphite is cheap, easy to process, high temperature strength, high temperature, low coefficient of thermal expansion and a series of excellent