Ti对Nb-Si合金组织及力学性能影响

温宝山; 骆良顺; 刘仁慈; 苏彦庆

doi:10.15980/j.tzzz.2019.08.024

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Ti对Nb-Si合金组织及力学性能影响
Effects of Ti on the Microstructure and Mechanical Properties of Nb-Si Alloy
2019年39卷第8期页码：905-909
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.08.024

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[1]温宝山,骆良顺,刘仁慈,苏彦庆.Ti对Nb-Si合金组织及力学性能影响[J].特种铸造及有色合金,2019,39(08):905-909.

Wen Baoshan, Luo Liangshun, Liu Renci, et al. Effects of Ti on the Microstructure and Mechanical Properties of Nb-Si Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(8):905-909.
[1]温宝山,骆良顺,刘仁慈,苏彦庆.Ti对Nb-Si合金组织及力学性能影响[J].特种铸造及有色合金,2019,39(08):905-909. DOI： 10.15980/j.tzzz.2019.08.024.

Wen Baoshan, Luo Liangshun, Liu Renci, et al. Effects of Ti on the Microstructure and Mechanical Properties of Nb-Si Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(8):905-909. DOI： 10.15980/j.tzzz.2019.08.024.

摘要

以Nb-18Si合金为研究对象

采用真空非自耗电弧炉制备Nb-18Si-xTi（x=0

24）合金

研究了Ti对Nb-Si合金组织及力学性能影响。结果表明

Ti元素能增大Nb-18Si-xTi合金中Nbss相的尺寸

减少其体积分数

使合金成分接近过共晶成分区

形成粗大连续的Nb

Si相。Ti可促进Nbss+Nb

共晶组织形成

为共析转变提供了形核衬底

从而促进了电弧熔炼态合金中Nb

Si相发生共析转变

形成Nbss+α-Nb

共析组织。Ti添加降低了Nb-Si合金的显微硬度

同时由于生成初生Nb

Si相

Nb-Si合金的室温压缩强度提高。

Abstract

Nb-18Si-xTi（x=0

24）alloy was prepared by vacuum non-consumable arc furnace

and the effects of Ti on the structure and mechanical properties of Nb-18Si alloy were analyzed.The results show that Ti element can increase the size of Nbss in Nb-18Si-xTi alloy with decrease of content

and take the alloy incline to hypereutectic zone and form coarse continuous Nb

Si phase.Nbss+Nb

eutectic structure can be generated with Ti addition

which provides a nucleation substrate for eutectoid transformation

thus promoting eutectoid transformation of Nb

Si phase in arc melted alloys and forming Nbss+α-Nb

eutectoid structure.Ti element can decrease the microhardness of Nb-Si alloys and increase the room temperature compressive strength due to the formation of primary Nb

Si phase.