Ag含量对SnBi58Sb3易熔合金性能的影响

Effect of Ag content on properties of SnBi58Sb3 fusible alloy

摘要

为改善SnBi58Sb3易熔合金的综合性能,向SnBi58Sb3合金中加入不同质量分数(0、0.2%、0.4%、0.6%、0.8%)的Ag元素,研究了Ag添加量对SnBi58Sb3合金的物相组成、显微结构、力学性能及熔化特性的影响规律,并分析了其作用机制.结果表明,Ag元素的加入可细化合金组织,使脆硬富Bi相分布更加均匀,提高了合金的抗拉强度和塑性.当Ag含量为0.2%时,合金的抗拉强度和断后伸长率达到了最高值,抗拉强度为81.3 MPa,断后伸长率为16%.同时,Ag含量对合金熔化特性的影响较小,改性后合金的熔点、熔程及熔化潜热仍能满足易熔合金的实际使用要求.本研究为易熔合金的性能优化提供了理论参考.

Abstract

To improve the comprehensive performance of SnBi58Sb3 fusible alloy,Ag element with different mass fractions(0,0.2%,0.4%,0.6%,0.8%) was added into SnBi58Sb3 alloy.The effects of Ag addition content on the phase composition,microstructure,mechanical properties and melting characteristics of SnBi58Sb3 alloy were investigated,and the corresponding mechanism was analyzed.The results show that Ag addition can refine the alloy structure,make the distribution of brittle Bi-rich phase more uniformly,and also improve the tensile strength and ductility of the alloy.When the Ag content is 0.2%,the tensile strength and elongation at break of the alloy reach the maximum values of 81.3 MPa and 16%,respectively.Meanwhile,Ag content has little effect on the melting characteristics of the alloy.The melting points,melting ranges and latent heats of fusion for the modified alloys can still meet the practical application requirements of fusible alloys.This study provides a theoretical reference for the performance optimization of fusiblealloys.

关键词

合金化 / 易熔合金 / 熔化性能 / 力学性能 / 显微组织

Key words

alloying / fusible alloy / melting performance / mechanical property / microstructure

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基金资助

河北省电介质与电解质重点实验室后补助经费项目(22567627H)