李银,周雨萌,张瑜,等.基于AgMn钎料的Ti2AlNb合金与GH536镍基合金的钎焊工艺与性能研究[J].精密成形工程,2025,17(6):56-65.
LI Yin,ZHOU Yumeng,ZHANG Yu,et al.Brazing Process and Performance of Ti2AlNb Alloy and GH536 Nickel-based Alloy Using AgMn Filler Metal[J].Journal of Netshape Forming Engineering,2025,17(6):56-65. |
| 基于AgMn钎料的Ti2AlNb合金与GH536镍基合金的钎焊工艺与性能研究 |
| Brazing Process and Performance of Ti2AlNb Alloy and GH536 Nickel-based Alloy Using AgMn Filler Metal |
| 投稿时间：2025-02-06 |
| DOI：10.3969/j.issn.1674-6457.2025.06.006 |
| 中文关键词: 钎焊 Ti2AlNb合金 镍基高温合金 微观组织 力学性能 |
| 英文关键词: brazing Ti2AlNb alloy nickel-based superalloy microstructure mechanical properties |
| 基金项目:国防基础科研计划(JCKY2023601C018) |
|
| 摘要点击次数: 27 |
| 全文下载次数: 5 |
| 中文摘要: |
| 目的 探讨银基钎料(AgMn)对Ti2AlNb合金和GH536镍基高温合金钎焊连接性能的影响机制，分析钎焊接头的微观组织、反应产物及力学性能，评估焊接工艺对接头性能的影响。方法 采用AgMn对Ti2AlNb合金和GH536高温合金进行钎焊实验，焊接温度设定为960~1 020 ℃，保温时间为5~30 min。通过光学显微镜、扫描电子显微镜(SEM)、能谱分析(EDS)以及X射线衍射(XRD)等手段表征焊接接头的微观组织与物相组成，并通过显微硬度和剪切强度测试评估接头的力学性能。结果 随着焊接温度和保温时间的增加，母材侧的扩散影响区和界面反应层宽度增加，钎焊接头钎缝中Ag层的宽度逐渐减小。当焊接温度为960 ℃、保温时间为20 min时，接头的最大室温抗剪强度为176.9 MPa。接头的断裂发生在Ti2AlNb合金侧界面反应区，断裂位置为β-Ti层，该层是接头中硬度最高的区域，断裂方式为脆性断裂。结论 AgMn银基钎料可有效实现Ti2AlNb合金与GH536合金的钎焊连接，且钎焊接头的力学性能受焊接温度和保温时间的显著影响。通过控制焊接工艺参数，可以获得强度较高且无明显缺陷的接头。 |
| 英文摘要: |
| The work aims to investigate the effect of silver-based filler metal AgMn on the brazing performance of Ti2AlNb alloy and GH536 nickel-based superalloy, analyze the microstructure, reaction products, and mechanical properties of brazing joints, and evaluate the impact of welding parameters on the joint performance. Brazing experiments were carried out on Ti2AlNb alloy and GH536 superalloy using AgMn filler metal, with welding temperature set between 960 ℃ and 1 020 ℃ and holding time ranging from 5 to 30 min. The microstructure and phase composition of the brazing joints were characterized by optical microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The mechanical properties of the joints were evaluated through microhardness and shear strength tests. Experimental results showed that as welding temperature and holding time increased, the diffusion-affected zone and interface reaction layer width on the base material side increased, while the Ag layer width in the brazing seam decreased. At welding temperature of 960 ℃ and holding time of 20 minutes, the maximum shear strength at room temperature was 176.9 MPa. The fracture of the joint occurred in the interface reaction zone on the Ti2AlNb alloy side, at the β-Ti layer, which was the hardest region of the joint, and the fracture mode was brittle. The AgMn silver-based filler metal effectively achieves brazing between Ti2AlNb alloy and GH536 alloy, with the mechanical properties of the brazed joint significantly affected by welding temperature and holding time. By controlling the welding process parameters, joints with higher strength and no significant defects can be obtained. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501719号