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采用微脉冲激光技术实现了厚度约为25μm FeSiB非晶薄带的搭接,研究了脉冲功率P、脉冲宽度T、脉冲频率F等主要工艺参数对焊缝成形的影响,分析了接头力学性能的变化规律。研究结果表明,当P与T搭配恰当时(P为4.8~7.2 W、T为1.5~1.9 ms、对应脉冲能量E为0.9~1.2 J)才可以获得焊缝成形良好、力学性能优异的焊接接头。随着T的增加,热影响区和焊缝区显微硬度逐渐降低,而随着P的增加,显微硬度先增大后减小;接头抗拉强度随着T和P的增大呈先增大后减小的趋势变化。当P=7.2 W、T=1.7 ms、F=1.5 Hz时,热影响区和焊缝区平均硬度值最高,约为1300 HV和1000 HV,抗拉强度可达363 MPa。
The effects of pulse power P, pulse width T and pulse frequency F on the forming of weld were studied by using micro-pulsed laser technique. The mechanical properties of the joint The law of change. The results show that when P and T are matched properly (P is 4.8-7.2 W, T is 1.5-1.9 ms and corresponding pulse energy E is 0.9-1.2 J), the welded joint with good weld formability and excellent mechanical properties can be obtained . With the increase of T, the microhardness of HAZ and weld zone gradually decreased, while the microhardness first increased and then decreased with the increase of P. The tensile strength of joint increased with the increase of T and P Increase and decrease the trend of change. When P = 7.2 W, T = 1.7 ms and F = 1.5 Hz, the average hardness of HAZ and weld zone is the highest, about 1300 HV and 1000 HV, and the tensile strength can reach 363 MPa.