Zr元素对Cu-6Ni-3Ti合金微观结构和性能的影响

doi:10.13251/j.issn.0254-6051.2025.02.009

摘要/Abstract

摘要： 研究了Zr含量对Cu-6Ni-3Ti-xZr合金微观结构、力学性能与导电率的影响。结果表明,合金凝固过程中Zr元素主要于晶界区域偏析,形成富Zr原子团簇,从而减缓晶粒的生长,并抑制枝晶的偏析。时效处理过程中,Zr元素在合金沉淀相周围累积,抑制沉淀相生长,提升合金硬度及其抗软化性。当Zr含量提高时,Cu₄Zr在Cu-6Ni-3Ti-0.5Zr合金中形成。在450 ℃时效2 h,Cu-6Ni-3Ti-0.3Zr合金表现出其最佳的力学性能和电性能,抗拉强度达到了807 MPa,硬度为230 HV2,导电率为50%IACS。

关键词: 铜合金, 锆, 强化机制, 沉淀相

Abstract: Effect of Zr content on the microstructure, mechanical properties and electrical conductivity of Cu-6Ni-3Ti-xZr alloy was investigated. The results show that zirconium elements mainly segregate at grain boundaries during solidification, forming zirconium-rich atomic clusters, slowing down the grain growth and inhibiting dendritic segregation. During the aging process, zirconium accumulates around the precipitated phases of the alloy, inhibiting the growth of the precipitated phases, and improving the hardness and its resistance to softening. When the content of zirconium elements is increased, Cu₄Zr is formed in the Cu-6Ni-3Ti-0.5Zr alloy. After aging at 450 ℃ for 2 h, the Cu-6Ni-3Ti-0.3Zr alloy has best mechanical and electrical properties, with tensile strength of 807 MPa, hardness of 230 HV2, electrical conductivity of 50%IACS.

Key words: copper alloy, zirconium, strengthening mechanism, precipitation

中图分类号:

TG146.1

靖青秀, 杨雪晴, 韦丹丹, 魏渺, 黄晓东. Zr元素对Cu-6Ni-3Ti合金微观结构和性能的影响[J]. 金属热处理, 2025, 50(2): 61-68.

Jing Qingxiu, Yang Xueqing, Wei Dandan, Wei Miao, Huang Xiaodong. Effect of Zr element on microstructure and properties of Cu-6Ni-3Ti alloy[J]. Heat Treatment of Metals, 2025, 50(2): 61-68.

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