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

作　　者：李俊青[1] 刘扭参[1,2] 杨明生 

机构地区：[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

出　　处：《热加工工艺》2010年第13期54-56,共3页Hot Working Technology

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151.46MPa和2.124%,与未添加稀土和锰合金相比,分别提高了14%和101%。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.

关 键 词：电热法 ZL102合金 Fe相形貌 锰和稀土 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]