根据某核电厂蒸汽发生器技术要求, 以合金化改性灰铸铁为基体, 装配石墨作润滑材料制备了铸铁/石墨复合减摩板; 并对复合减摩板进行了显微组织分析、力学性能试验和摩擦磨损试验。结果表明: 基体铸铁的压缩屈服强度为790 MPa, 单片减摩板的极限承载能力为49 770 kN, 可以对核电蒸汽发生器起到足够的支撑作用; 复合减摩板在低于6 500 kN载荷下运动1 000次以内时摩擦因数稳定, 均低于0.15, 磨损量不足0.13 mm, 具有良好的承载和减摩性能, 满足核电蒸汽发生器减摩板技术要求。

With modified grey iron as substrate, assembled with graphite as lubrication material, the grey iron/graphite composite antifriction plate was designed and developed according to the requirement of steam generator in a nuclear power plant, and the microstructure analyzation, mechanical test and friction test were carried out. The results show that the compressive yield strength of the modified grey iron was 790 MPa; the ultimate bearing capacity of the antifriction plate was 49 770 kN, providing the efficient support for the steam generator of nuclear power. When rubbing under the load less than 6 500 kN for 1 000 times, the friction coefficient of the antifriction plate was stable and below 0.15; the wear value was also less than 0.13 mm, indicating excellent bearing capability and antifriction performance. The values of friction coefficient and wear loss both reached the technical requirement.