钛、锆元素对ODS钢中氧化物析出相的分布特征及材料力学性能的影响

doi:10.11896/cldb.20060155

材料导报

2021, Vol. 35

Issue (16): 16104-16110 https://doi.org/10.11896/cldb.20060155

金属与金属基复合材料

钛、锆元素对ODS钢中氧化物析出相的分布特征及材料力学性能的影响

谢锐¹, 吕铮², 徐长伟¹, 刘波², 刘春明²

1 沈阳建筑大学材料科学与工程学院,沈阳 110168;
2 东北大学材料科学与工程学院,材料各向异性与织构教育部重点实验室,沈阳 110819

Effects of Ti,Zr Elements on Oxides Precipitates Distribution Characteristics and Mechanical Properties of ODS Steels

XIE Rui¹, LYU Zheng², XU Changwei¹, LIU Bo², LIU Chunming²

1 School of Material Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
2 Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China

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摘要以氧化物弥散强化(Oxides dispersion strengthened,ODS)钢合金粉为研究对象,利用合金粉的真空等温热处理来模拟ODS钢的烧结成型过程。增大ODS钢中合金元素的含量,以此研究合金元素对氧化物析出相分布特征、种类及合金粉力学性能的影响。利用XRD、XAFS、SAXS等技术手段检测球磨及真空等温热处理不同时间后合金粉中氧化物析出相的分布特征、种类变化情况,同时测量各合金粉的硬度。XRD实验结果表明,当合金中添加了钛元素和锆元素后,除铁素体衍射峰外,热处理过程中还形成了Cr₂O₃相、Y₂Ti₂O₇相及Y₄Zr₃O₁₂相。而在不含钛元素和锆元素的合金粉中只检测到Cr₂O₃相和铁素体的存在。XAFS实验结果表明,添加了钛元素和锆元素后,合金粉的XAFS曲线发生改变,与纯钇元素及纯氧化钇样品的曲线不同,含钛元素和锆元素的合金粉经真空等温热处理0.5 h后,其中氧化物析出相的分布密度最高为2.73×10²²/m³;氧化物析出相达到分布峰值的时间早于不含钛元素和锆元素的样品,说明钛元素和锆元素会促进氧化物相的形成。同时,含钛元素和锆元素的合金粉的硬度也高于不含钛元素和锆元素的合金粉样品。

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关键词: 氧化物弥散强化钢钛元素锆元素 X射线吸收精细结构小角度X射线散射力学性能

Abstract: In this paper, the alloy powders of oxide dispersion strengthened (ODS) steel were studied. The vacuum isothermal heat treatment was applied to simulate the sintering process of ODS steel. The contents of alloy elements were expended to study the distribution characteristics, types of oxide precipitates and mechanical properties. XRD, XAFS, SAXS and other technical means were used to detect the changes of oxide precipitates distribution characteristics and kinds, in the alloy powders after ball milling and vacuum isothermal heat treatment, the hardness of alloy powders were measured at the same time. The XRD results show that when titanium and zirconium are added to the alloy, Cr₂O₃, Y₂Ti₂O₇ and Y₄Zr₃O₁₂ phases are formed in alloy powders during heat treatment process besides ferrite. However, only Cr₂O₃ phase and ferrite were detected in the alloy powder without titanium and zirconium. The XAFS experimental results show that the XAFS curve of alloy powder changes when titanium and zirconium are added, which is different from pure yttrium and pure yttria. The SAXS results show that the distribution density of oxide precipitates reaches to maximum value of 2.73×10²²/m³ after 0.5 h vacuum isothermally heat treatment. The maximum value of oxide precipitates distribution density appears earlier than the alloy powder sample without titanium and zirconium, which indicates that titanium and zirco-nium can promote the formation of oxide precipitates. At the same time, the hardness of alloy powders containing titanium and zirconium are higher than that of alloy powder without titanium and zirconium.

Key words: oxide dispersion strengthened steel Ti element Zr element X-ray absorption fine structure small angle X-ray scattering mechanical property

发布日期: 2021-09-07

ZTFLH:

TB31

基金资助: 辽宁省兴辽英才计划(XLYC1902103);国家自然科学基金青年基金(51601031)

通讯作者: xierui198479@126.com

作者简介: 谢锐,沈阳建筑大学讲师。2007年于沈阳建筑大学获得无机非金属材料工程学士学位,2010年9月至2015年7于东北大学获得材料学博士学位。博士毕业后继续在东北大学冶金工程博士后流动站工作。工作期限为2015年10月至2018年3月。2018年3月博士后出站到沈阳建筑大学任教。至今已公开发表学术论文超过15篇,获得国家专利授权两项。他的研究领域主要围绕国家重点发展的先进金属材料、核反应堆用金属结构材料。同时,他的研究方向还获得了国家自然科学基金青年科学家基金项目、国家重大研发专项子课题、辽宁省自然科学基金等项目的支持。

引用本文:

谢锐, 吕铮, 徐长伟, 刘波, 刘春明. 钛、锆元素对ODS钢中氧化物析出相的分布特征及材料力学性能的影响[J]. 材料导报, 2021, 35(16): 16104-16110.
XIE Rui, LYU Zheng, XU Changwei, LIU Bo, LIU Chunming. Effects of Ti,Zr Elements on Oxides Precipitates Distribution Characteristics and Mechanical Properties of ODS Steels. Materials Reports, 2021, 35(16): 16104-16110.

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http://www.mater-rep.com/CN/10.11896/cldb.20060155 或 http://www.mater-rep.com/CN/Y2021/V35/I16/16104

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