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将纵向磁场引入到钛合金的非熔化极钨极氩弧焊(TIG)中,焊接过程中调节磁场电流的大小,通过对不同磁场电流下焊接接头进行相应的拉伸试验、硬度试验和显微组织分析,探究磁场电流对焊接接头的力学性能和显微组织的作用规律。结果表明:外加磁场可以提升焊接接头的综合性能,当磁场电流为6 A、频率为20 Hz时,焊接接头的力学性能达到了最佳值,此时抗拉强度为452.6 MPa,伸长率为29.84%,硬度为351 HV,焊缝显微组织的细化最明显。
The longitudinal magnetic field is introduced into the TIG of titanium alloy. During the welding process, the size of the magnetic field current is adjusted. Corresponding tensile test, hardness test and microscopic examination of the welded joints under different magnetic field currents are carried out. Organization analysis, explore the magnetic field current on the mechanical properties of welded joints and the role of microstructure. The results show that the external magnetic field can improve the overall performance of the welded joint. When the magnetic field current is 6 A and the frequency is 20 Hz, the mechanical properties of the welded joint reach the optimal value, the tensile strength is 452.6 MPa and the elongation is 29.84%, hardness of 351 HV, the most obvious microstructure refinement.