论文部分内容阅读
采用埋弧焊在不同的线能量下焊接磨机筒体试板,根据英国BS7448断裂韧度试验标准,进行裂纹尖端张开位移(Crack Tip Opening Displacement,CTOD)试验。测试了不同线能量条件下的试板焊缝金属和热影响区的CTOD断裂韧度特征值。分析磨机厚板焊接接头断裂韧度与线能量的关系,为磨机筒体设计提供了科学依据,并确定了实际生产的最优焊接工艺参数。试验结果表明,随着线能量增加,焊缝金属韧度值先下降后增加,热影响区(Heat Affected Zone,HAZ)韧度值先增加后减小,并得到最佳焊接线能量。
The submerged arc welding was used to weld the barrel of the test plate under different wire energies and the Crack Tip Opening Displacement (CTOD) test was conducted according to the British BS7448 fracture toughness test standard. The CTOD fracture toughness characteristics of the weld metal and heat-affected zone were tested under different line energy conditions. The analysis of the relationship between the fracture toughness and the line energy of the mill plate welded joints provides a scientific basis for the design of the mill barrel and determines the optimal welding process parameters for the actual production. The results show that with the increase of wire energy, the toughness of the weld metal first decreases and then increases. The HAZ toughness first increases and then decreases, and the optimal welding line energy is obtained.