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对Cu-Fe非晶合金基复合材料进行了成分设计,研究了半固态处理工艺对(Cu0.7Fe0.3)88-xAl12Zrx组织和力学性能的影响。结果表明,Zr含量增加能够提高(Cu0.7Fe0.3)88-xAl12Zrx的非晶形成能力,x=50时试样为全非晶结构,过热吸铸试样其过冷液相区宽度ΔTx为92.4 K,约化玻璃转变温度Trg和γ参数分别为0.415和0.361,试样具有良好的热稳定性和非晶形成能力,且其断裂强度显著高于复合材料,压缩断裂强度高达1734 MPa。x=10的试样中马氏体相对塑性的提高有一定效果,但是缺乏非晶基体的强度。随着Zr的添加,Fe的比例降低,试样中塑性相消失,析出脆性金属间化合物较多,试样脆性大。半固态处理试样的非晶热稳定性降低,有利于晶体相的析出,且母合金经半固态处理过后试样的组织更加均匀,力学性能得到明显改善。
The composition of Cu-Fe amorphous alloy matrix composite was studied. The effect of semi-solid treatment on the microstructure and mechanical properties of (Cu0.7Fe0.3) 88-xAl12Zrx was studied. The results show that the increase of Zr content can improve the amorphous formation ability of (Cu0.7Fe0.3) 88-xAl12Zrx. When x = 50, the sample has a completely amorphous structure. The supercooled liquid phase region ΔTx 92.4 K, the reduced glass transition temperatures Trg and γ were 0.415 and 0.361, respectively. The samples had good thermal stability and amorphous formation ability, and their fracture strengths were significantly higher than those of the composites. The compressive fracture strength was as high as 1734 MPa. The martensite relative increase of plasticity in the sample of x = 10 has a certain effect, but the strength of the amorphous matrix is lacking. With the addition of Zr, the proportion of Fe decreases, the plastic phase disappears in the sample, more brittle intermetallic compounds are precipitated, and the sample is brittle. The semi-solid sample decreases the amorphous thermal stability, facilitates the precipitation of the crystal phase, and the microstructure of the sample after the semi-solid treatment is more uniform and the mechanical properties are obviously improved.