铜业工程Issue(6)：70-79,10.DOI:10.3969/j.issn.1009-3842.2023.06.008
垂直半连续铸造Cu-15Ni-8Sn合金组织及性能研究
Microstructures and Properties of Cu-15Ni-8Sn Alloy Prepared by Vertical Semi-Continuous Casting
摘要
Abstract
The vertical semi-continuous casting method was applied to successfully prepare Cu-15Ni-8Sn alloy,the solidification struc-ture,element segregation,the microstructure and properties after heat treatment were systematacially analysed.The casting structure of Cu-15Ni-8Sn alloy prepared by conventional casting consisted of Sn-depleted α-Cu(Ni,Sn)solid solution,Sn-rich γ phase,and lamel-lar(α+γ)structure,and the Sn element mainly segregated at grain boundaries.The grain refinement can be reached by vertical semi-continuous casting equipped with mechanical vibration(MV)and electromagnetic field(EMF)simultaneously,the Sn-rich γ phase dis-tributed uniformly in grain interior and on grain boundaries,which reduces the degree of the inverse macro-segregation and micro-segre-gation at grain boundaries of Sn element.The optimal properties with a hardness of HV 401,an electrical conductivity of 8.4%IACS,an ultimate strength of 1233 MPa,a yield strength of 1185 MPa,and an elongation of 4.5%can be obtained in the sample after solution treatment at 850 ℃,rolling treatment with 90%deformation and aging at 400 ℃ for 1 h.关键词
Cu-15Ni-8Sn合金/晶界/垂直半连续铸造/微观组织/力学性能Key words
Cu-15Ni-8Sn alloy/grain boundary vertical semi-continuous casting/microstructures/mechanical properties分类
金属材料引用本文复制引用
郭中凯,接金川,李廷举..垂直半连续铸造Cu-15Ni-8Sn合金组织及性能研究[J].铜业工程,2023,(6):70-79,10.基金项目
山东省自然科学基金项目(ZR2023QE031) （ZR2023QE031）
宁波市科技创新2025重大专项(2021Z051)资助 （2021Z051）
