Fe<sub>3</sub>Al/Q235异种材料扩散焊界面相结构分析

李亚江; 王娟; 尹衍升; 吴会强; 冯吉才

Fe₃Al/Q235异种材料扩散焊界面相结构分析

1.
哈尔滨工业大学现代焊接生产技术国家重点实验室, 哈尔滨 150001;山东大学材料科学与工程学院, 济南 250061
2.
山东大学材料科学与工程学院, 济南 250061
3.
哈尔滨工业大学现代焊接生产技术国家重点实验室, 哈尔滨 150001

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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- 收稿日期: 2001-06-03

Analysis of Microstnicture in the Interface of Diffusion Welding for Fe₃Al/Q235 Dissimilar materials

1.
National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001;School of Materials Science and Engineering, Shandong University, Jinan 250061, China
2.
School of Materials Science and Engineering, Shandong University, Jinan 250061, China
3.
National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001

摘要

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。
- Fe₃Al金属间化合物 /
- 扩散焊 /
- 界面相结构
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.
- Fe₃Al intennetallic compound /
- diffusion welding /
- inteiface

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Fe3Al/Q235异种材料扩散焊界面相结构分析

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Analysis of Microstnicture in the Interface of Diffusion Welding for Fe3Al/Q235 Dissimilar materials

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Fe₃Al/Q235异种材料扩散焊界面相结构分析

Analysis of Microstnicture in the Interface of Diffusion Welding for Fe₃Al/Q235 Dissimilar materials