Si对NbCr<sub>2</sub>/Cr合金组织及性能的影响

雷志立; 鲁世强; 邓莉萍

doi:10.15980/j.tzzz.2018.02.004

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Si对NbCr₂/Cr合金组织及性能的影响
Effects of Alloying Element Si on Microstructure and Properties of NbCr₂/Cr Alloy
2018年38卷第2期页码：128-131
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.02.004

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[1]雷志立,鲁世强,邓莉萍.Si对NbCr_2/Cr合金组织及性能的影响[J].特种铸造及有色合金,2018,38(02):128-131.

Lei Zhili, Lu Shiqiang, Deng Liping. Effects of Alloying Element Si on Microstructure and Properties of NbCr₂/Cr Alloy[J]. Special Casting & Nonferrous Alloys, 2018,38(2):128-131.
[1]雷志立,鲁世强,邓莉萍.Si对NbCr_2/Cr合金组织及性能的影响[J].特种铸造及有色合金,2018,38(02):128-131. DOI： 10.15980/j.tzzz.2018.02.004.

Lei Zhili, Lu Shiqiang, Deng Liping. Effects of Alloying Element Si on Microstructure and Properties of NbCr₂/Cr Alloy[J]. Special Casting & Nonferrous Alloys, 2018,38(2):128-131. DOI： 10.15980/j.tzzz.2018.02.004.

摘要

采用机械合金化+热压烧结工艺制备了NbCr

/Cr-xSi（x为摩尔分数）合金

探讨了Si对NbCr

/Cr合金组织和性能的影响。结果表明

合金由Cr固溶体和Laves相NbCr

组成

当Si含量达到5.0%后

出现了Nb

Si相。随着Si含量增加

合金的相对密度和断裂韧度逐渐降低

而维氏硬度逐渐增大。另外

随着Si含量增加

合金的室温抗压强度先增大后减小

而屈服强度和塑性应变逐渐降低

合金的断裂机制由准解理断裂转变为解理断裂。

Abstract

The NbCr

/Cr-xSi alloys were prepared by mechanical alloying and hot pressing.Then

the influence of Si on microstructure and properties of the NbCr

/Cr alloy was investigated.The results reveal that the alloy is composed of Cr solid solution and Laves phase NbCr

.The Nb

Si phase appears in the alloy with the 5.0%Si content.With the increase of Si content

the relative density and fracture toughness of the NbCr

/Cr alloy are decreased gradually

while the Vickers hardness is increased.In addition

the compression strength of the alloy is increased firstly and then decreased

while the yield strength and plastic strain are decreased gradually.The fracture mechanism of the NbCr

/Cr alloy is changed from quasi cleavage fracture to cleavage fracture.

关键词

NbCr2/Cr合金Si组织性能

Keywords

NbCr2/Cr AlloySiMicrostructureProperties

references

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Si对NbCr2/Cr合金组织及性能的影响

Effects of Alloying Element Si on Microstructure and Properties of NbCr2/Cr Alloy

DOI： 10.15980/j.tzzz.2018.02.004

摘要

Abstract

关键词

Keywords

references

Si对NbCr₂/Cr合金组织及性能的影响

Effects of Alloying Element Si on Microstructure and Properties of NbCr₂/Cr Alloy