铝合金/碳纤维增强热塑性复合材料的激光对接焊研究 
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Aluminum Alloy/Carbon Fiber Reinforced Thermoplastic Laser Butt Welding
1 宁波大学机械工程与力学学院, 浙江 宁波315211
2 中国科学院宁波材料技术与工程研究所, 浙江 宁波 315201
图 & 表
图 1. 焊接夹具及焊接原理示意图
Fig. 1. Schematic of welding fixture and welding principle
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图 4. 测温装置与测温方法
Fig. 4. Temperature measuring device and method
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图 5. 各组试验得到的抗拉强度
Fig. 5. Tensile strength obtained in each experimental group
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图 6. 样件示意图。(a)焊接失败的样件;(b)焊接成功的样件
Fig. 6. Schematic of samples. (a) Failed welding sample; (b) successful welding sample
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图 7. 样件A接头断裂后的表面形貌。(a)铝合金表面;(b)复合材料表面
Fig. 7. Surface appearance of sample A joint after fracture. (a) Aluminum alloy surface; (b) composite surface
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图 8. 样件B接头断裂后的表面形貌。(a)铝合金表面;(b)复合材料表面
Fig. 8. Surface appearance of sample B joint after fracture. (a) Aluminum alloy surface; (b) composite surface
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图 9. 样件C接头断裂后的表面形貌。(a)铝合金表面;(b)复合材料表面
Fig. 9. Surface appearance of sample C joint after fracture. (a) Aluminum alloy surface; (b) composite surface
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图 10. 样件D接头断裂后的表面形貌。(a)铝合金表面;(b)复合材料表面
Fig. 10. Surface appearance of sample D joint after fracture. (a) Aluminum alloy surface; (b) composite surface
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图 11. 焊接过程中接头的温度测试结果
Fig. 11. Measured joint temperature during welding process
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表 1材料的热物理参数
Table1. Thermophysical parameters of materials
| Material | Density /(kg·m-3) | Specific heat /(J·Kg-1·℃-1) | Thermal conductivity /(W·m-1·℃-1) | Melting point /℃ | Decompositiontemperature /℃ |
|---|
| PA | 1150 | 2500 | 0.25 | 215--225 | 330 | | T700 | 1760 | 712 | 6.5 | 3000 | | | 7075-T6 | 2800 | 860--1320 | 130 | 475--635 | |
|
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表 2试验参数配置表
Table2. Configuration of experiment parameters
| Level | Factor |
|---|
| Laser powerP /W | Welding speedv /(mm·s-1) | Stirring amplitudeΦ /mm | Stirring frequencyf /Hz | Clamp pressureP /MPa | Defocusing amountd /mm |
|---|
| 1 | 250 | 2 | 0.6 | 10 | 0.1 | 25 | | 2 | 300 | 4 | 0.8 | 20 | 0.2 | 30 | | 3 | 350 | 6 | 1.0 | 30 | 0.3 | 35 | | 4 | 400 | 8 | 1.2 | 40 | 0.4 | 40 | | 5 | 450 | 10 | 1.4 | 50 | 0.5 | 45 |
|
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表 3正交试验设计
Table3. Orthogonal experimental design
| Number | Laser powerP /W | Welding speedv /(mm·s-1) | Stirringamplitude Φ /mm | Stirring frequencyf /Hz | Clamp pressureP /MPa | Defocusingamount d /mm |
|---|
| 1 | 250 | 2 | 0.6 | 10 | 0.1 | 25 | | 2 | 250 | 4 | 0.8 | 20 | 0.2 | 30 | | 3 | 250 | 6 | 1.0 | 30 | 0.3 | 35 | | 4 | 250 | 8 | 1.2 | 40 | 0.4 | 40 | | 5 | 250 | 10 | 1.4 | 50 | 0.5 | 45 | | 6 | 300 | 2 | 0.8 | 30 | 0.4 | 45 | | 7(A) | 300 | 4 | 1.0 | 40 | 0.5 | 25 | | 8 | 300 | 6 | 1.2 | 50 | 0.1 | 30 | | 9(D) | 300 | 8 | 1.4 | 10 | 0.2 | 35 | | 10 | 300 | 10 | 0.6 | 20 | 0.3 | 40 | | 11 | 350 | 2 | 1.0 | 50 | 0.2 | 40 | | 12 | 350 | 4 | 1.2 | 10 | 0.3 | 45 | | 13 | 350 | 6 | 1.4 | 20 | 0.4 | 25 | | 14(B) | 350 | 8 | 0.6 | 30 | 0.5 | 30 | | 15 | 350 | 10 | 0.8 | 40 | 0.1 | 35 | | 16 | 400 | 2 | 1.2 | 20 | 0.5 | 35 | | 17(C) | 400 | 4 | 1.4 | 30 | 0.1 | 40 | | 18 | 400 | 6 | 0.6 | 40 | 0.2 | 45 | | 19 | 400 | 8 | 0.8 | 50 | 0.3 | 25 | | 20 | 400 | 10 | 1.0 | 10 | 0.4 | 30 | | 21 | 450 | 2 | 1.4 | 40 | 0.3 | 30 | | 22 | 450 | 4 | 0.6 | 50 | 0.4 | 35 | | 23 | 450 | 6 | 0.8 | 10 | 0.5 | 40 | | 24 | 450 | 8 | 1.0 | 20 | 0.1 | 45 | | 25 | 450 | 10 | 1.2 | 30 | 0.2 | 25 |
|
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表 4正交试验极差分析
Table4. Range analysis of orthogonal experiment
| Range | Factor |
|---|
| Laser power | Weldingspeed | Stir theamplitude | The stirringfrequency | Clamp pressure | Defocusingamount |
|---|
| kJ1 | 248.96 | 79.70 | 336.56 | 280.78 | 256.62 | 351.82 | | kJ2 | 228.58 | 339.54 | 157.54 | 157.26 | 239.36 | 237.08 | | kJ3 | 267.50 | 211.72 | 243.18 | 240.02 | 256.40 | 95.06 | | kJ4 | 330.44 | 331.68 | 242.98 | 326.62 | 153.06 | 174.94 | | kJ5 | 80.46 | 193.30 | 175.68 | 151.26 | 250.50 | 297.04 | | RJ | 249.98 | 259.84 | 179.02 | 175.36 | 103.56 | 256.76 | | Rank | 3 | 1 | 4 | 5 | 6 | 2 |
|
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叶逸云, 贾少辉, 焦俊科, 束学道. 铝合金/碳纤维增强热塑性复合材料的激光对接焊研究[J]. 中国激光, 2020, 47(10): 1002003. Ye Yiyun, Jia Shaohui, Jiao Junke, Shu Xuedao. Aluminum Alloy/Carbon Fiber Reinforced Thermoplastic Laser Butt Welding[J]. Chinese Journal of Lasers, 2020, 47(10): 1002003.
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