固溶温度对Fe-24Al-Sn合金微观组织和力学性能的影响  

Effect of solid solution temperature on microstructure and property of Fe-24Al-Sn alloys

作　　者：何东[1] 石磊[1] 王海波[1] 李强[1] 

机构地区：[1]北方工业大学机械与材料工程学院,北京100144

出　　处：《金属功能材料》2017年第3期25-28,共4页Metallic Functional Materials

基　　金：国家自然科学基金项目资助(51401226);北方工业大学青年拔尖人才项目资助(XN071010)

摘　　要：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。Effect of the different solid solution temperatures on the microstrueture and property was investigated. The results indicate that the hardness of the alloy gradually increase from 379HV to 394HV and compressive strength decrease from 500 MPa to 225 MPa with the increase of the solid solution temperature. Comparing with the Fe-24Al alloys, the alloy becomes brittle. The phase structure of the casting alloys are comprised of B2 （FeAl） ordered phase, Fe3 Al, Fe9 Sn and a few of Sn. B2→DO3（Fe3 Al） phase transformation gradually occurs as the solid solution temperature increase.

关 键 词：固溶温度 Fe-24Al-Sn合金 组织 力学性能 

分 类 号：TG132.3[一般工业技术—材料科学与工程] TG156.94[金属学及工艺—合金]