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以高阻尼汽车用Fe-Cr-Mo合金为对象,研究了不同退火温度对其组织和阻尼性能的影响规律。结果表明,随着磁场强度的增加,合金的磁致伸缩系数先增加然后趋于稳定;当退火温度为900℃,合金的磁致伸缩系数最高;随着退火温度的升高,合金的损耗因子先增加后降低,在退火温度为900℃时取得最大值;合金经充分的退火后,饱和磁致伸缩系数与最大阻尼值成正比关系。
The effect of different annealing temperature on the microstructure and damping properties of Fe-Cr-Mo alloy with high damping is studied. The results show that the magnetostriction coefficient firstly increases and then tends to be stable with the increase of the magnetic field strength. When the annealing temperature is 900 ℃, the magnetostriction coefficient of the alloy is the highest. With the increase of the annealing temperature, the loss factor After the first increase and then decrease, the maximum value is obtained when the annealing temperature is 900 ℃. After sufficient annealing, the saturation magnetostriction coefficient is proportional to the maximum damping value.