热处理温度对FeCrVTa0.1W0.1Ti0.1C0.17 多组元合金组织与性能的影响

doi:10.11901/1005.3093.2025.274

材料研究学报

2026, Vol. 40

Issue (6): 474-480 DOI: 10.11901/1005.3093.2025.274

研究论文

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热处理温度对FeCrVTa_0.1W_0.1Ti_0.1C_0.17 多组元合金组织与性能的影响

郭威¹^,²^,³, 张月林¹^,², 曹梓恒¹^,², 李龙丰¹^,², 赵觅⁴(

), 吴树森¹^,²

^1.华中科技大学材料成形与模具技术全国重点实验室武汉 430074
^2.华中科技大学材料科学与工程学院武汉 430074
^3.深圳华中科技大学研究院深圳 518057
^4.华中科技大学航空航天学院武汉 430074

Effect of Heat Treatment Temperature on Microstructure and Properties of FeCrVTa_0.1W_0.1Ti_0.1C_0.17 Alloy of Multi-components

GUO Wei¹^,²^,³, ZHANG Yuelin¹^,², CAO Ziheng¹^,², LI Longfeng¹^,², ZHAO Mi⁴(

), WU Shusen¹^,²

^1.State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
^2.School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
^3.Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen 518057, China
^4.School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

引用本文:

郭威, 张月林, 曹梓恒, 李龙丰, 赵觅, 吴树森. 热处理温度对FeCrVTa_0.1W_0.1Ti_0.1C_0.17 多组元合金组织与性能的影响[J]. 材料研究学报, 2026, 40(6): 474-480.
Wei GUO, Yuelin ZHANG, Ziheng CAO, Longfeng LI, Mi ZHAO, Shusen WU. Effect of Heat Treatment Temperature on Microstructure and Properties of FeCrVTa_0.1W_0.1Ti_0.1C_0.17 Alloy of Multi-components[J]. Chinese Journal of Materials Research, 2026, 40(6): 474-480.

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摘要:

研究了不同热处理温度对FeCrVTa_0.1W_0.1Ti_0.1C_0.17多组元合金显微组织与力学性能的影响。结果表明，在800 ℃、900 ℃热处理的合金中析出的晶内细密Laves相产生强化作用使其强度显著提高(屈服强度达1501 MPa)，但是晶界上的富Fe相随着热处理温度的提高由孤立枝晶演变为连续网状结构，成为裂纹扩展优先路径而使合金的塑性下降。在1000 ℃热处理的合金中Laves相的粗化严重弱化其强化作用，而富Fe相则转变为孤立的团块状缓解了晶界脆性使塑性恢复到28.9%、而强度回复到铸态水平。富Fe相的形貌(连通性)是调控FeCrV基多组元合金塑性的关键因素，而Laves相的尺寸影响强度的演变。

关键词 ：金属材料, 多主元合金, 热处理, 微观组织, 力学性能, 析出强化

Abstract：

FeCrV-based alloy FeCrVTa_0.1W_0.1Ti_0.1C_0.17 was prepared by vacuum arc melting technique, and subjected to vacuum heat treatment. Then the effect of heat treatment temperatures (800 ^oC, 900 ^oC, 1000 ^oC) on its microstructure and mechanical properties were investigated viacompression tester, hardness tester, scanning electron microscopy, electron probe microanalyzer and X-ray diffractometer. It reveals that heat treatments at 800 and 900 ^oC may significantly enhance the alloy strength (yield strength up to 1501 MPa) through precipitation strengthening by fine intragranular Laves phases. However, as temperature increases, the Fe-rich phase at grain boundaries evolves from isolated dendrites into a continuous network structure, acting as a preferential path for crack propagation and leading to reduced ductility. At 1000 ^oC, coarsening of Laves phases severely weakens their strengthening effect, while the Fe-rich phase transforms into isolated blocky particles, alleviating grain boundary embrittlement and restoring ductility to 28.9%, with strength returning to the as-cast level. The results demonstrate that the morphology (connectivity) of the Fe-rich phase is the key factor governing ductility, while the size of Laves phases dominates the evolution of strength. This finding provides a reference for balancing the strength-ductility of FeCrV-based alloys of multi-components.

Key words： metallic materials multi-principal element alloy heat treatment microstructure mechanical properties precipitation strengthening

收稿日期: 2025-09-11

ZTFLH:

TG139

基金资助:国家自然科学基金(52201075);湖北省重点研发计划(2025BAB012);湖北省自然科学基金(2023AFB798);深圳市科技计划(JCYJ20220530160813032);深圳市科技计划(JCYJ20240813153421029)

通讯作者: 赵觅，副教授，zhaomi2018@hust.edu.cn，研究方向为高温结构材料与金属高温腐蚀防护

Corresponding author: ZHAO Mi, Tel: 17508640660, E-mail: zhaomi2018@hust.edu.cn

作者简介: 郭威，男，1987年生，副研究员

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https://www.cjmr.org/CN/10.11901/1005.3093.2025.274 或 https://www.cjmr.org/CN/Y2026/V40/I6/474

图1 在不同温度热处理后FeCrVTa0.1W0.1Ti0.1C0.17合金的XRD谱

图2 HT800不同倍率的SEM照片

表1 在不同温度热处理后FeCrVTa0.1W0.1Ti0.1C0.17 合金晶界处富Fe 相的元素

图3 HT900的SEM照片

图4 HT900合金的EDS元素面分布

图5 HT1000微观组织SEM照片

图6 在不同温度热处理后FeCrVTa0.1W0.1Ti0.1C0.17合金的力学性能

表2 在不同温度热处理后FeCrVTa0.1W0.1Ti0.1C0.17合金的力学性能

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