超声振动下结构钢Q345GJC冶金板拉伸性能分析

Drawing Performance Analysis of Structural Q345GJC Metallurgical Plate under Ultrasonic Vibration

以Q345GJC冶金钢板为研究对象,通过超声振动辅助拉伸测试方法分析了超声振动引起的钢板力学特性变化与接触面摩擦状态改变情况,探讨了超声振动因素引起的钢板拉伸件拉伸强度与试样回弹性能差异。研究结果表明:设置超声振动后,试件滑动时摩擦力降低,随着超声振幅与频率的提高,摩擦力持续下降;设置超声振动时,Q345GJC钢板拉伸件获得了更小拉伸力,随着振动振幅与频率的提高变化更明显;不同方向形成了差异较大的尺寸,回弹程度最大达到0.4 mm;设置超声振动的情况下,筒口外径形成了更小的回弹量,且形成了更小的尺寸波动状态。该研究有助于提高高层建筑结构钢的承载性能,具有很广的应用价值。

The changes of mechanical properties of steel plate and friction state of contact surface caused by ultrasonic vibration were analyzed by ultrasonic-assisted tensile test method.The differences between tensile strength of steel plate drawing parts and resilience of samples caused by ultrasonic vibration factors were discussed.The results show that the friction decreases when the ultrasonic vibration is set,and the friction decreases continuously with the increase of ultrasonic amplitude and frequency.When ultrasonic vibration is set,the drawing force of Q345GJC steel plate is smaller,and the change is more obvious with the increase of vibration amplitude and frequency.Different directions formed a large difference in size,the maximum degree of rebound up to 0.4 mm.When ultrasonic vibration is set,the outer diameter of the cylinder mouth forms a smaller rebound amount and a smaller size fluctuation state.This research is helpful to improve the load-bearing properties of structural steel in high-rise buildings and has wide application value.