| 摘要: |
| 采用X射线衍射、透射电镜和电子衍射技术对Fe3Al/Q235真空扩散焊界面附近的微观相结构进行了试验研究。试验结果表明,当加热温度1050~1080℃,保温时间60min,压力9.8MPa时,Fe3Al金属间化合物与Q235钢扩散焊界面附近形成了明显的扩散过渡区,该过渡区由Fe3Al相和α-Fe(Al)固溶体构成,显微硬度约为480~540HM,不存在含铝较高的高硬度脆性相。有利于提高Fe3Al/Q235扩散过渡区的韧性,提高扩散焊接头的抗裂纹能力。扩散过渡区中的Fe3Al相与α-Fe(Al)固溶体之间存在着(111-0)α-Fe(Al)//(011)Fe3Al和[001]α-Fe(Al)//[100]Fe3Al的晶体学取向关系。 |
| 关键词: Fe3Al金属间化合物 扩散焊 界面相结构 |
| DOI： |
| 分类号: |
| 基金项目:国家重点实验室访问学者基金资助项目(05170104) |
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| Analysis of Microstnicture in the Interface of Diffusion Welding for Fe3Al/Q235 Dissimilar materials |
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LI Ya-jiang1,2, WANG Juan2, YIN Yan-sheng2, WU Hui-qiang2, FENG Ji-cai1
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1.National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001;2.School of Materials Science and Engineering, Shandong University, Jinan 250061, China
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| Abstract: |
| Phase structure characteristics nearby the interface of Fe3Al/Q235 diffusion welding are researched by X-ray diffraction (XRD) and transmission electronic microscope (TEM),etc.The test results indicated that obviously diffusion transition zone forms nearby the interface of Fe3Al/Q235 under the condition of heating temperature 1 050~1 080℃,holding time 60 min and pressure 9.8 MPa,which indicated that the diffusion interface of Fe3AVQ235 was combined well.The diffusion transition zone consists of Fe3Al and α Fe(Al) solid solution.Microhardness in the diffusion transition zone nearby is HM 480~540.There is not brittle phase of high hardness in the interface transition zone.This is favorable to enhance toughness of Fe3Al/Q235 diffusion welded joint.There is crystal oriental relation of (111-0)α-Fe(Al)//(011)Fe3Al和[001]α-Fe(Al)//[100]Fe3(Al) between Fe3Al phase and α Fe(Al) solid solution in the diffusion transition zone. |
| Key words: Fe3Al intennetallic compound diffusion welding inteiface phase structure |
