锰和稀土对电热ZL102合金组织和性能的影响
Influences of Mn and RE on Microstructure and Mechanical Properties of Electro-thermal ZL102 Alloy
李俊青1， 刘扭参1，2， 杨明生3
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作者单位：1. 河南工程学院 数理科学系，河南 郑州451191； 2. 郑州大学 物理工程学院材料物理教育部重点实验室，河南 郑州，450052； 3. 登封电厂集团铝合金有限公司，河南 登封452477
中文关键字：电热法； ZL102合金； Fe相形貌； 锰和稀土； 力学性能
英文关键字：electro-thermal method; ZL102 alloys; morphologies of Fe phase; Mn and RE; mechanical properties
中文摘要：研究了稀土和锰对电热ZL102合金微观组织和力学性能的影响。结果表明，Mn可抑制长针状的β-Fe相，使部分针状铁相转变成骨骼状或汉字状的α-Fe相，但针状铁相仍存在；RE元素并不能使长针状的β-Fe相转变成α-Fe相，但它可以使长针状β-Fe相断裂变小；Mn和RE的复合使用可以有效改善铁相形貌，使针状铁相变为小块的骨骼状或汉字状。当加入1.1wt%的锰和0.4wt%的稀土时，合金的微观组织和力学性能同时达到最佳，合金的抗拉强度和伸长率分别达到151.46 MPa和2.124%，与未添加稀土和锰合金相比，分别提高了14%和101%。
英文摘要：The influences of RE and Mn on microstructure and mechanical properties of electro-thermal ZL102 alloy were studied. The results show that adding Mn element can restrain long needle-like β-Fe phase and transform it into skeleton or Chinese character α-Fe phase， but the needle-like Fe phases still remain. RE elements are unable to change the needle-like Fe phase into α-Fe phase， but can make the long needle-like β-Fe phases ruptured. The complex alloying of RE and Mn can refine the morphologies of iron in the alloys, transform needle-like phase of iron into skeleton or Chinese character phase. When adding 1.1%Mn and 0.4%RE, the optimal microstructure and mechanical properties of the alloys is obtained. The tensile strength of the alloys reaches 151.46 MPa while the ductility attains 2.124%, which was increased by 14% and 101% respectively, compared with the alloys without Mn and RE.