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Fe-5％Al-1％Cu-Ti铁磁性型减振合金于真空感应炉熔炼,钢锭经扒皮后锻成φ5mm的棒材.用弯曲共振法测量试样的内耗Q~(-1),并选用45~#钢和球墨铸铁为基准进行了比较。用冲击法测量试样的矫顽力H_C,用金相显微镜作了金相观察,并测量了机械性能。结果表明:合金于1000℃,1hr保温后进行炉冷,空冷,油冷,水冷,空冷后H_C最小,Q~(-1)最大;合金900℃.1000℃,1100℃保温1hr后,随着退火温度的升高,晶粒逐渐增大,即以1100℃1hr退火后H_C最小,晶粒最大,内耗最大。用Q~(-1)=3.0×10~(15)关系式对上述不同热处理制度下性能变比规律作了定性解稀.本合金的内耗Q~(-1)是45~#钢的38倍,是球墨铸铁的3倍。
The Fe-5% Al-1% Cu-Ti ferromagnetic damping alloy was melted in a vacuum induction furnace and the ingot was forged into a φ5mm bar after being skinned.The internal friction Q ~ (-1) And use 45 ~ # steel and ductile iron as a benchmark for comparison. The coercive force H_C of the sample was measured by the impact method, the metallographic observation was carried out with a metallographic microscope, and the mechanical property was measured. The results show that the alloy has the lowest H_C and the largest Q_ (-1) after furnace cooling, air cooling, oil cooling, water cooling and air cooling at 1000 ℃ for 1hr. After the alloy is 900 ℃ .1000 ℃ and holding at 1100 ℃ for 1hr, Annealing temperature increases, the grain gradually increased, that is, 1h annealing at 1100 ℃ H_C minimum, the largest grain, the largest internal friction. The relationship between the change of performance and the ratio under different heat treatment conditions was qualitatively solved by the relation of Q ~ (-1) = 3.0 × 10 ~ (15). The internal friction Q ~ (-1) of this alloy is 45 ~ Times, is 3 times of ductile iron.