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应用电磁搅拌MAG焊接技术对400 MPa级细晶钢16Mn进行焊接试验,对交变磁场作用下焊缝的组织进行了研究,分析了磁感应强度、磁场频率等参数对焊缝组织及冲击性能、疲劳性能等力学性能的影响。研究结果表明,焊缝金属组织细化,焊缝金属的冲击韧性和疲劳强度得到提高。当激磁电流和磁场频率达到最优时,焊缝组织转变为等轴晶,冲击性能接近母材;但随着激磁电流和磁场频率的继续增大,则焊缝组织粗大,冲击功减小。
The electromagnetic welding MAG welding technology was used to test the welding of 16Mn fine-grain 400 MPa grade steel. The microstructure of the weld under the action of alternating magnetic field was studied. The influences of the magnetic induction and magnetic field frequency on the microstructure and impact performance, fatigue Performance and other mechanical properties. The results show that the microstructure of weld metal is refined and the impact toughness and fatigue strength of weld metal are improved. When the excitation current and the frequency of the magnetic field are optimized, the microstructure of the weld changes into equiaxed grains and the impact performance approaches that of the parent metal. However, as the exciting current and the magnetic field frequency continue to increase, the microstructure of the weld becomes coarse and the impact energy decreases.