热处理对深过冷快速定向凝固Fe-Ga合金组织和性能的影响  

Influence of heat treatment on microstructure and properties of deep undercooled and rapid-directionally solidified Fe-Ga alloys

作　　者：丁雨田[1,2] 谢荣艳[1] 胡勇[1,2] 秦凯[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050 [2]兰州理工大学温州泵阀工程研究院,浙江温州325105

出　　处：《兰州理工大学学报》2014年第5期1-4,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(11004091);浙江省自然科学基金(Y4090219);甘肃省自然科学基金(0916RJZA025)

摘　　要：Fe-Ga合金后续的热处理工艺同合金的成分配比、制备工艺一样,对合金的磁致伸缩性能有重要影响.采用熔融玻璃净化与循环过热相结合的方法,制备深过冷快速定向凝固〈110〉轴向取向的Fe83Ga17合金棒材,分别采用高温和低温淬火工艺,研究淬火前后合金的组织和磁致伸缩性能.结果表明:快速定向凝固Fe83Ga17合金从不同温度淬火至室温,合金在TC附近淬火获得较高的磁致伸缩应变,淬火可抑制有序DO3相的形成,与高温淬火工艺相比,在TC附近淬火,只有部分特定区域优先得到淬火,发生modified-DO3相转变,并部分保留高温无序组织,最终获得有序-无序的室温组织,这种组织有利于Fe-Ga合金磁致伸缩性能的提高.As the preparation process and composition ratio,the subsequent heat treatment will have important influence on the magnetostrictive properties of Fe-Ga alloys.By means of glass fluxing purification and cyclic superheating,the deep-undercooled rapid-directionally solidified alloy Fe83Ga17 with〈110〉axial orientation was prepared.Then the alloy Fe83Ga17 was quenched at high temperature and low temperature respectively to investigate its microstructure and magnetostrictive properties before and after the quenching.The result showed that,quenched at different temperature until at room temperature,the alloy Fe83Ga17 achieved higher magnetostrictive strain at about TC,indicating that quenching process could restrain the formation of ordered DO3 phase.Compared with high temperature quenching process,only part of particular area was quenched prior when quenching at about TC,so that modified-DO3 phase change took place.The disordered phase was partially retained.Finally,at room temperature,an ordered-disordered structure was obtained,which would be advantageous to the improvement on magnetostrictive properties of Fe-Ga alloys.

关 键 词：FE-GA合金 热处理 磁致伸缩 modified-DO3相 

分 类 号：TG136[一般工业技术—材料科学与工程]