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| 蜂窝与K418B高温合金电阻定位焊工艺研究 |
| Resistance Positioned Welding Process of Honeycomb and K418B High-temperature Alloy |
| Received:July 12, 2023 |
| DOI：10.3969/j.issn.1674-6457.2024.01.016 |
| 中文关键词: 蜂窝密封 电阻定位焊 焊接工艺 接头界面 接头断口焊合区 |
| 英文关键词: honeycomb sealing resistance positioned welding welding process joint interface welding zone of the joint fracture |
| 基金项目:江西省优势科技创新团队重点项目(20181BCB19002) |
| Author Name | Affiliation | | HUANG Bin | AECC South Industry Company Limited, Hunan Zhuzhou 412000, China | | XU Xiangbo | School of Aviation Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China | | LIU Hanming | School of Aviation Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China | | DENG Lipeng | School of Aviation Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China | | LIU Qiang | School of Aviation Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China | | HUANG Yongde | School of Aviation Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China |
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| 中文摘要: |
| 目的 获得蜂窝电阻定位焊的最佳工艺参数并提高焊接接头的力学性能。方法 通过正交试验法，对15 mm×10 mm×4.2 mm的GH3536蜂窝和15 mm×10 mm×2.5 mm的K418B基板进行系列电阻焊实验，主要的焊接工艺控制参数包括焊接电流、焊接时间和焊接压力。对焊接接头进行了抗拉强度测试，系统分析了工艺参数对接头力学性能的影响;通过光学显微镜和扫描电镜(SEM)对拉伸试样的断口形貌和失效形式进行了观测;采用电镜配套的能谱(EDS)探头对焊接接头的界面元素进行了分析。结果 GH3536蜂窝与K418B基板定位焊系列接头的最高平均抗拉载荷为123.76 N。接头界面处的K418B基板为细小等轴晶组织。基板与蜂窝之间存在宽度约2 μm的界面层，其成分与基板相近。接头断口焊合区面积随电流的增大而增大，且在高电流下焊合区焊痕呈蝴蝶状分布。结论 在电阻定位焊工艺参数中，焊接电流对接头强度的影响最为显著，其次为焊接压力，焊接时间的影响程度相对较弱。得到的最优参数组合如下:焊接时间为2 ms，焊接电流为4.5 kA，焊接压力为17.5 N。在该参数下能够获得最高的接头平均抗拉载荷(123.76 N)。 |
| 英文摘要: |
| The work aims to obtain the optimal process parameters for the resistance positioned welding of the honeycombs and improve the mechanical properties of the welded joint. The orthogonal experimental method was used to carry out a series of electric resistance welding tests on GH3536 honeycomb (15 mm×10 mm×4.2 mm) and K418B substrate (15 mm×10 mm× 2.5 mm), and the main welding process control parameters included the current, the time, and the pressure. Tensile strength tests were conducted on the welded joints, and the effect of process parameters on the mechanical properties of the joints was analyzed systematically. The fracture morphology and the failure mode of the tensile specimens were observed by optical microscopy and scanning electron microscopy (SEM). The interface element distribution of welded joints was analyzed by the energy dispersive spectroscopy (EDS) probe equipped in the SEM. The highest average tensile load of the positioned welding series joint specimens of GH3536 honeycomb and the K418B substrate was 123.76 N. The K418B substrate at the joint interface had fine equiaxed crystal structure. An interface layer with a width of approximately 2 μm existed between the substrate and the honeycomb, and its composition was similar to that of the substrate. The welding zone of the joint fractures increased with the increase of current, and the welding zone showed a butterfly-shaped distribution under the high current. Among the various resistance positioned welding process parameters, the welding current has the most significant impact on the joint strength, followed by the welding pressure, and the effect of welding time is relatively weak. The optimal combination of parameters is as follows:welding time of 2 ms, welding current of 4.5 kA, and welding pressure of 17.5 N. Under this combination, the highest average tensile load (123.76 N) can be obtained. |
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