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含碳量高于0.25％的钢,特别是合金元素含量复杂、机械及使用性能水平高的钢的焊接性能比较差。降低焊接件形成裂纹的倾向,使破断减慢的有效方法,就是提高钢焊接性能的有效方法,也就是在焊缝周围区域焊接之后的冷却过程中进行超声波处理。这样的处理能加速超声波变形场中扩散相变的效果,并且在参数一定时能够影响焊缝区域组织的形成,使之不易断裂。本文测定了各种波辐(波段从0到1×10~(-3))的超声波变形对35X钢中组成成分比例关系、弥散度和组织形态的影响。超声波处理是在奥氏体转变过程中进行的。选择35X钢进行研究,一是因为在亚临界温度范围内,过冷奥氏体的稳定性较小,因而在超声波作用下奥氏体分解可能会有较大的变化;二是因为选择声学参数和奥氏体稳定性
Steels with a carbon content of more than 0.25%, especially alloys with a high content of alloying elements, have poor weldability in steels with high mechanical and service properties. An effective way to reduce the tendency of welds to crack and slow down the fracture is to improve the weldability of the steel by performing an ultrasonic treatment during cooling after welding in the area around the weld. Such a treatment can accelerate the effect of diffusion phase transformation in the ultrasonic deformation field and can affect the formation of the weld zone structure at a certain parameter so that it is not easily broken. In this paper, the effects of ultrasonic deformation of various wave radiations (from 0 to 1 × 10 ~ (-3)) on the composition, dispersion and microstructure of 35X steel were investigated. Ultrasonic treatment is carried out during the austenitic transformation. Select 35X steel for research, first, because in the subcritical temperature range, the stability of sub-cooled austenite less, so under the action of ultrasound austenite decomposition may have greater changes; the second is because the choice of acoustic parameters And austenitic stability