采用PAO40聚α-烯烃合成润滑油，十二羟基硬脂酸、癸二酸、硼酸和氢氧化锂等稠化剂以及FeSiB软磁粉制备了铁磁颗粒质量分数分别为30%，45%，60%的复合锂基磁流变脂，研究了磁流变脂的流变特性和磁流变效应。结果表明：3种磁流变脂的剪切应力均随剪切速率的增加而增大，随电流的增加先快速增大后趋于平稳；储能模量均随剪切应变的增大先迅速降低后趋于平稳，随电流的增加先增大后趋于稳定；随电流增加，磁流变脂的损耗因子先增大后减小直至趋于稳定，阻尼特性和磁流变效应增强；铁磁颗粒含量越高，磁流变脂的剪切应力和储能模量越大，阻尼特性和磁流变效应越强。

Composite lithium-based magnetorheological greases, containing 30wt%, 45wt%, 60wt% ferromagnetic particles, respectively, were prepared by using PAO40 poly-alpha olefin synthetic base oil, thickening agents of dodecyl hydroxyl stearic acid, sebacic acid, boric acid and lithium hydroxide, and FeSiB soft magnetic powder. The rheological property and magnetorheological effect of the magnetorheological greases were studied. The results show that the shear stresses of the three magnetorheological greases increased with increasing shear rate, and increased rapidly and then tended to be stable with increasing current. The storage modulus decrased rapidly and then tended to be stable with increasing shear rate, and increased first and then tended to be stable with increasing current. With increasing current, the loss factor of the magnetorheological grease increased first, then decreased and then tended to be stable, the damping characteristics and the magnetorheological effect were improved. The higher the ferromagnetic particle content, the larger the shear stress and the storage modulus of the magnetorheological grease, and the stronger the damping characteristics and the magnetorheological effect.