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通过扫描电镜(SEM)、X射线衍射(XRD)和电子万能实验机等研究了不同温度热处理(350～900℃)对TA2/316L爆炸焊接接头显微组织和力学性能的影响。结果表明：随热处理温度的升高，TA2/316L爆炸焊接接头界面缺陷如层状偏析、微孔洞及短裂纹得到修复，微观组织逐渐均匀化，晶粒较为细小，但当热处理温度超过550℃时，TA2侧的组织逐渐粗化，当热处理温度为900℃时，TA2侧和316L侧的组织均显著粗化，接头界面生成大量Fe_2Ti、NiTi、FeTiO3及Fe2.75Ti0.25O4等脆性相，导致接头的剪切强度显著降低；当热处理温度为550℃时，TA2/316L爆炸焊接接头的剪切强度达到最大值，为335 MPa,比原始接头试样提升了55.8%,这是由于此时接头界面的微孔洞、裂纹等缺陷得到修复，TA2侧的晶粒细小均匀，接头界面没有Fe_2Ti、FeTiO3及Fe2.75Ti0.25O4等脆性相的形成及聚集。
Abstract：Effect of different temperature heat treatments(350-900 ℃) on the microstructure and mechanical properties of TA2/316L explosive welded joints was studied using scanning electron microscopy(SEM), X-ray diffraction(XRD), and electron universal testing machine. The results show that with the increase of heat treatment temperature, the interface defects such as layer segregation, micropores, and short cracks in the TA2/316L explosive welded joints are repaired, and the microstructure gradually becomes uniform with smaller grains. However, when the heat treatment temperature exceeds 550 ℃, the microstructure on the TA2 side gradually coarsens. When the heat treatment temperature is 900 ℃, the microstructure on both the TA2 and 316L sides significantly coarsens, and a large number of brittle phases such as Fe_2Ti, NiTi, FeTiO3, and Fe2.75Ti0.25O4 are generated at the welded joints interface, resulting in a significant decrease in the shear strength of the welded joints. When the heat treatment temperature is 550 ℃, the shear strength of the TA2/316L explosive welded joint reaches its maximum value of 335 MPa, which is 55.8% higher than the original joint sample. This is because the defects such as micropores and cracks at the joint interface are repaired at this time, the grains on the TA2 side are small and uniform, and there is no formation or aggregation of brittle phases such as Fe_2Ti, FeTiO3, and Fe2.75Ti0.25O4 at the joint interface.
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基本信息:
DOI：10.13289/j.issn.1009-6264.2025-0227
中图分类号:TG407;TG156
引用信息:
[1]赵美,陶国文,陈文慧.热处理温度对TA2/316L焊接接头显微组织及性能的影响[J].材料热处理学报,2026,47(01):203-210+236.DOI:10.13289/j.issn.1009-6264.2025-0227.
基金信息:
辽宁省菱镁矿高值利用工程研究中心项目(LMNY2025020222); 营口市新质生产力技术支撑与验证中心项目(JSZCZX0410)
2026-01-23
2026-01-23