A displacement threshold was used to control DC upset buttwelding process, and constant pressure and varied pressure tests were carried out on Q235 a steel strips.
采用位移门槛电压控制焊接过程，对Q 235 - A钢进行了变压式和等压式扁钢带直流电阻对焊试验。
2
Induction pressurewelding is often used to manufacture the butt joints of steam pipe of power plant.
感应压力焊常用于生产电站蒸汽管对接接头； 但在抽检样品时接头断口上有时存在所谓的“白斑”组织。
3
Weldingbutt joint and angular deformation are easy to take shape during the assembly welding of pressure vessels, especially giant spherical tanks.