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众所周知,淬火-回火钢焊缝金属的显微组织和机械性能取决于焊缝金属从熔化状态冷却到室温的速度。由于受许多因素的影响,很难在焊接期间直接控制冷速。这些因素包括:输入能量(电流、电压和焊速,即“焊接参数”);板材预热温度;接头几何形状(如板厚、焊缝截面形状和尺寸、被焊板材之间的夹角等);电极直径;工艺方法;电源极性和保护气体
It is well-known that the microstructure and mechanical properties of quenched-tempered steel weld metal depend on the speed at which the weld metal cools to room temperature from the molten state. Due to many factors, it is difficult to control the cooling rate directly during welding. These factors include: input energy (current, voltage and welding speed, ie “welding parameters”); plate preheating temperature; joint geometry (eg plate thickness, weld seam shape and size, angle between welded plates, etc.) ); Electrode diameter; process method; power polarity and shielding gas