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采用超声波焊接技术成功地连接了非晶合金薄带Fe78Si9B13和铝合金3003,分别对焊接接头进行了显微结构观察、微区-X射线衍射分析、显微硬度测试和剥离试验。结果表明,焊接接头无明显缺陷,焊接后的非晶合金未出现晶化现象,焊缝区的维氏硬度约为600 HV,接头的剥离强度可达9.81 kN/m。合理的焊接工艺参数为:(1)静压力1373.44 N、超声时间140 ms;(2)静压力1144.53 N、超声时间150 ms。由于非晶合金Fe78Si9B13在过冷液相区存在超塑性和热稳定性,同时铝合金3003半冷作硬化时塑性较强,超声波焊接时非晶合金和铝合金界面会产生塑性流动以实现冶金结合。
The amorphous alloy ribbon Fe78Si9B13 and aluminum alloy 3003 were successfully connected by ultrasonic welding technology. The microstructure, micro-area X-ray diffraction, microhardness and peel test of the welded joints were carried out respectively. The results show that there is no obvious defect in the welded joint, and the post-weld amorphous alloy is free of crystallization. The Vickers hardness in the weld zone is about 600 HV and the peel strength of the joint can reach 9.81 kN / m. Reasonable welding process parameters: (1) static pressure 1373.44 N, ultrasonic time 140 ms; (2) static pressure 1144.53 N, ultrasonic time 150 ms. As the amorphous alloy Fe78Si9B13 exists superplasticity and thermal stability in the supercooled liquid region, meanwhile, the plasticity of semi-cold hardening of the aluminum alloy 3003 is strong, and the plastic flow is generated at the interface between the amorphous alloy and the aluminum alloy during the ultrasonic welding to achieve the metallurgical bond .