为了获得C/C螺栓紧固特性,采用紧固力矩试验方法开展了不同结构C/C螺栓紧固特性研究,研究内容包括不同垫片材料、单螺母和双螺母、涂胶和不涂胶等组合情况下C/C螺栓K值的变化趋势,并研究了C/C螺栓的极限抗扭能力。结果表明:碳基螺栓的扭矩系数值K与金属螺栓差异很大,不同材料结构也有差异,涂胶对增加夹紧力有明显的提高作用。 In order to obtain the C / C bolt fastening properties using test methods conducted tightening torque of different configuration C / C bolt fastening properties, including studies of different gasket materials, single double nut and nut, adhesive and non-adhesive, etc. C / C bolt K values ​​under the combination of the trend, and studied the C / C bolt ultimate torsional resistance. The results show that the value of torque coefficient K of carbon-based bolts is very different from that of metal bolts, and the difference of the structure of different materials is also different. The application of glue increases the clamping force obviously.