| 摘要: |
| 本研究通过采用光学显微镜探究了EQNiCr-3带极堆焊材料中的微观组织特征,揭示了其微观结构与力学性能之间的内在联系。实验结果表明,所研究的堆焊层中,γ-Ni基固溶体为主要的组成相,且在其内部分布有大量的弥散强化相,这些微观组织的协同作用显著提高了材料的硬度和抗拉强度。利用显微硬度测试和拉伸试验,系统地评价了热处理状态下EQNiCr-3带极堆焊材料的力学性能。研究发现,经过多次焊接热循环后,材料硬度和抗拉强度较原始状态下分别提升了约10%,而韧性略有下降。本研究的发现对指导EQNiCr-3带极堆焊材料的应用和性能优化具有重要的实际意义,同时也为类似高性能焊接材料的研制提供了理论基础。 |
| 关键词: EQNiCr-3堆焊材料 微观组织 力学性能 显微硬度 拉伸试验 |
| DOI： |
| 分类号:TG 456.7 |
| 基金项目: |
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| Microstructure and Mechanical Properties of EQNiCr-3 Strip Surfacing Material |
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张基隆
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1
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| Abstract: |
| This study investigated the microstructure characteristics of EQNiCr-3 strip welding material using an optical microscope, revealing the intrinsic relationship between its microstructure and mechanical properties. The experimental results indicate that the γ - Ni based solid solution is the main constituent phase in the studied weld overlay, and there are a large number of dispersed strengthening phases distributed inside it. The synergistic effect of these microstructures significantly improves the hardness and tensile strength of the material. The mechanical properties of EQNiCr-3 strip electrode overlay material under heat treatment were systematically evaluated using microhardness testing and tensile testing. Research has found that after multiple welding thermal cycles, the hardness and tensile strength of the material have increased by about 10% compared to their original state, while the toughness has slightly decreased. The findings of this study have important practical significance for guiding the application and performance optimization of EQNiCr-3 strip electrode welding materials, and also provide a theoretical basis for the development of similar high-performance welding materials. |
| Key words: EQNiCr-3 cladding material microstructure mechanical properties microhardness tensile test |
