温度对电镀镍铁合金材料性能的影响研究

Researh on Temperature Effect on Material Properties of Ni-Fe Alloy

对镍铁合金材料进行125~450℃保温2h的退火处理,TEM观察结果表明,镍铁合金材料随着热处理温度的升高,晶粒尺寸呈现长大的趋势,当>350℃时,晶粒尺寸出现一个突变长大,平均晶粒尺寸>200nm。对热处理后的镍铁合金材料进行单向拉伸试验,结果表明,当温度<300℃时,合金材料的拉伸强度基本没有发生较大的变化,最高抗拉强度>1 700MPa;当温度>300℃时,拉伸强度急剧降低。

Here nanocrystalline alloys is by annealing heat treatment at 125-450℃ for 2 hours. By TEM observation, the resuits show that with increasing heat treatment temperature, the grain size of the nano Ni-Fe alloy material has an increasing tendency. When the temperature is above 350 ℃, the average crystal grain size turns to 200 nm or more in the emergence of a mutation. Through the tensile test of nano-nickel-iron alloy material after heat treatment, the results show that when the treatment temperature is below 300 ℃. the tensile strength of alloys has basically no big change, and the maximum tensile strength is over 1 700 MPa; in the treatment temperature above 300 ℃, tensile strength decreases dramatically.