退火温度对FeMoCrVTiSix高熵合金组织及力学性能的影响

doi:10.13251/j.issn.0254-6051.2020.12.002

金属热处理 ›› 2020, Vol. 45 ›› Issue (12): 7-12.DOI: 10.13251/j.issn.0254-6051.2020.12.002

退火温度对FeMoCrVTiSi_x高熵合金组织及力学性能的影响

薛彦均, 尉文超, 王毛球, 时捷

钢铁研究总院特殊钢研究所, 北京 100081

收稿日期:2020-06-05 出版日期:2020-12-25 发布日期:2021-01-14
通讯作者: 时捷,教授级高工,博士,E-mail:shijie@nercast.com
作者简介:薛彦均(1996—),男,硕士研究生,主要研究方向为高熵合金的组织性能,E-mail:15110562925@163.com。

Effect of annealing temperature on microstructure and mechanical properties of FeMoCrVTiSi_x high entropy alloy

Xue Yanjun, Yu Wenchao, Wang Maoqiu, Shi Jie

Institute of Special Steel, Central Iron and Steel Research Institute, Beijing 100081, China

Received:2020-06-05 Online:2020-12-25 Published:2021-01-14

摘要/Abstract

摘要： 在400、600、800、1100 ℃下对FeMoCrVTiSi_x(x=0、0.3)进行退火处理,利用X射线衍射仪、扫描电镜、差热扫描分析仪、显微硬度计、万能试验机等探究了不同退火温度对合金的组织和力学性能的影响。结果表明,Si元素的添加提高了FeMoCrVTi高熵合金的热稳定性。经过退火处理,FeMoCrVTiSi_x高熵合金的微观组织仍为以BCC固溶相为主的枝晶结构,但在枝晶边缘出现黑色的细小富Ti相,其含量随着退火温度的增加而增多,在1100 ℃下富Ti相回溶。富Ti相的析出提高了合金的硬度,其中,800 ℃退火后试样的硬度达到最大值,FeMoCrVTi试样的硬度达到932 HV0.2,FeMoCrVTiSi_0.3的硬度达到998 HV0.2。

关键词: FeMoCrVTiSi_x高熵合金, 退火处理, 微观组织, 力学性能

Abstract: Effect of different annealing temperatures (400, 600, 800, 1100 ℃) on the microstructure and mechanical properties of FeMoCrVTiSi_x(x=0, 0.3) alloy was studied by using X-ray diffractometer(XRD), scanning electron microscope(SEM), differential thermal scanning analyzer(DSC), microhardness tester and universal material testing machine. The results show that the addition of Si improves the thermal stability of the FeMoCrVTi high entropy alloy. After annealing treatment, the microstructure of FeMoCrVTiSi_x high entropy alloy is still mainly composed of BCC solid solution phase, but a black fine Ti-rich phase appears at the edge of the dendrite, and its content increases with the increase of annealing temperature until it re-dissolves at 1100 ℃. The precipitation of Ti-rich phase is conducive to the improvement of the hardness. The hardness of the specimen reaches the maximum value annealed at 800 ℃, with that of the FeMoCrVTi and FeMoCrVTiSi_0.3 alloys reaching 932 HV0.2 and 998 HV0.2, respectively.

Key words: FeMoCrVTiSi_x high entropy alloy, annealing treatment, microstructure, mechanical properties

中图分类号:

TG156.2

薛彦均, 尉文超, 王毛球, 时捷. 退火温度对FeMoCrVTiSi_x高熵合金组织及力学性能的影响[J]. 金属热处理, 2020, 45(12): 7-12.

Xue Yanjun, Yu Wenchao, Wang Maoqiu, Shi Jie. Effect of annealing temperature on microstructure and mechanical properties of FeMoCrVTiSi_x high entropy alloy[J]. Heat Treatment of Metals, 2020, 45(12): 7-12.

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退火温度对FeMoCrVTiSi_x高熵合金组织及力学性能的影响

Effect of annealing temperature on microstructure and mechanical properties of FeMoCrVTiSi_x high entropy alloy

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退火温度对FeMoCrVTiSix高熵合金组织及力学性能的影响

Effect of annealing temperature on microstructure and mechanical properties of FeMoCrVTiSix high entropy alloy

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退火温度对FeMoCrVTiSi_x高熵合金组织及力学性能的影响

Effect of annealing temperature on microstructure and mechanical properties of FeMoCrVTiSi_x high entropy alloy