王伟番,路全彬,雷小伟,等.Zn-Al钎料钎焊Al-Si-Cu压铸铝合金组织及性能[J].精密成形工程,2025,17(6):89-96.
WANG Weipan,LU Quanbin,LEI Xiaowei,et al.Microstructure and Properties of Al-Si-Cu Die Casting Aluminum Alloy Brazed by Zn-Al Brazing Filler Metals[J].Journal of Netshape Forming Engineering,2025,17(6):89-96. |
| Zn-Al钎料钎焊Al-Si-Cu压铸铝合金组织及性能 |
| Microstructure and Properties of Al-Si-Cu Die Casting Aluminum Alloy Brazed by Zn-Al Brazing Filler Metals |
| 投稿时间：2025-01-21 |
| DOI：10.3969/j.issn.1674-6457.2025.06.010 |
| 中文关键词: Zn-Al钎料 压铸铝合金 钎焊 微观组织 剪切强度 |
| 英文关键词: Zn-Al brazing filler metals die casting aluminum alloys brazing microstructure shear strength |
| 基金项目:河南省科技研发联合基金(225200810013);浙江省“尖兵领雁+X”研发项目(2024C01086) |
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| 中文摘要: |
| 目的 以Al-Si-Cu系压铸铝合金AC4B为研究对象，研究不同成分的Zn-Al钎料配合氟铝酸铯膏状钎剂对钎焊接头微观组织和力学性能的影响，以期为压铸铝合金钎焊及其应用提供技术参考。方法 采用金相显微镜(OM)、电子扫描电镜(SEM)、能谱分析(EDS)对母材和钎焊接头组织进行分析;采用万能电子试验机对钎焊接头进行压缩剪切试验，并对剪切断口进行分析。结果 不同成分的Zn-Al钎料均能获得致密的钎缝组织;钎缝组织主要由Zn基固溶体/Al基固溶体、Zn-Al共晶组织、块状Si组成;随着钎料中Al元素含量的增加，钎焊接头的剪切强度增加。98Zn02Al钎料的剪切强度最低，剪切强度为92 MPa，85Zn15Al钎料的剪切强度最高，达到112 MPa。剪切试样均断裂在钎缝位置，断口平齐，无明显塑性变形;断口存在明显的解理特征，为脆性断裂。结论 采用Zn-Al钎料钎焊Al-Si-Cu系压铸铝合金，获得了较为致密的钎焊接头，可为后续压铸铝合金的钎焊研究及应用提供一定的技术参考。 |
| 英文摘要: |
| The work aims to study the effect of Zn-Al filler metals with different Al contents on the microstructure and mechanical properties of AC4B die casting aluminum alloy of Al-Si-Cu series, with the aim of providing technical references for brazing of die casting aluminum alloys and applications. Metallographic microscope (OM), electron scanning electron microscope (SEM) and energy dispersive spectrometry (EDS) were used to analyze the structure of base metal, brazed joint. A compression shear test of brazed joint was carried out by universal electronic testing machine, and the fracture surfaces were analyzed. Zn-Al brazing metal of different composition could obtain dense brazing structure. The brazed joint structure was mainly composed of Zn solid solution/Al-based solid solution, Zn-Al eutectic and Si. The shear strength of the brazing joint increased with the increase of the Al content in brazing filler metal. The shear strength of 98Zn02Al filler metal was the lowest, reaching 92 MPa. The shear strength of 85Zn15Al filler metal was the highest, reaching 112 MPa. The fractures of the shear specimens all occurred at the position of brazing joints, and the fractures were flat without obvious plastic deformation. The fracture had obvious cleavage characteristics and might be brittle fracture. By using Zn-Al brazing filler metal to brazing the die-cast aluminum alloy, a relatively dense increase joint is obtained, which can provide certain technical references for the subsequent brazing research of the die casting aluminum alloy. |
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