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研究了不同固溶温度对Fe-24Al-Sn合金的微观组织和力学性能的影响。结果表明,与Fe-24Al合金相比,随着固溶温度从825℃增加到875℃,Fe-24Al-Sn合金的硬度逐渐从379HV增大到394HV,抗压强度逐渐从500 MPa降低到225 MPa,合金变脆。铸态合金的相结构为B2的FeAl相和Fe3Al相,还出现了Fe9Sn和Sn相。随着固溶温度的增加,合金中逐步发生B2→DO3(Fe3Al)的相变。
The effects of different solution temperature on microstructure and mechanical properties of Fe-24Al-Sn alloy were studied. The results show that as the solution temperature increases from 825 ℃ to 875 ℃, the hardness of Fe-24Al-Sn alloy gradually increases from 379 to 394 HV and the compressive strength decreases from 500 MPa to 225 MPa, brittle alloy. The phase structure of the as-cast alloy is the FeAl phase and the Fe3Al phase of B2, and the Fe9Sn and Sn phases also appear. With the increase of solution temperature, the phase transition of B2 → DO3 (Fe3Al) gradually occurs in the alloy.