摘要
采用CO2气体保护焊工艺对Q345钢板(δ=4 mm)分别进行连续焊和脉冲焊焊接试验,对2种焊接接头显微组织、显微硬度和热影响区尺寸进行对比分析。研究表明:脉冲焊焊接接头组织较连续焊更为均匀,且产生魏氏组织较少;2种焊接工艺条件下的焊接接头显微硬度峰值均位于过热区,连续焊接头各部位显微硬度均略高于脉冲焊接头;脉冲焊接头热影响区尺寸小于连续焊接头热影响区尺寸。
CO2 gas shielded arc welding process was applied to Q345 steel plate(δ=4 mm) for continuously welding and pulsed welding method respectively in the paper.The microstructure,microhardness and HAZ dimensions of welded joint gained by the two methods was analyzed and compared.It showed that welded joint structure forms more evenly and obtaining less widmanstatten structure by pulsed arc welding method comparing with continuously welding.Under two welding procedure,both of microhardness peak value of welded joints were located within overheated zone,macrohardness of each welded joint part acquired by continuously welding method was slightly higher than that of pulsed arc welding method.It also indicated that pulsed arc welding caused less HAZ dimensions comparing with continuously welding method.
出处
《焊接技术》
北大核心
2013年第6期10-12,84-85,共3页
Welding Technology
关键词
连续焊
脉冲焊
显微组织
显微硬度
热影响区尺寸
continuously welding,pulsed arc welding,microstructure,microhardness,HAZ dimensions
