Effect of single/double pass welded ioint performance of Q345E steel with repair welding once in bond area

LI Changfan; HAO Yongkui; GU Dian; GONG ZHaochao; ZhANG Yongqiang

doi:10.7512/j.issn.1001-2303.2020.10.10

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Effect of single/double pass welded ioint performance of Q345E steel with repair welding once in bond area
Vol. 50, Issue 10, Pages: 50-56(2020)
DOI： 10.7512/j.issn.1001-2303.2020.10.10

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LI Changfan, HAO Yongkui, GU Dian, et al. Effect of single/double pass welded ioint performance of Q345E steel with repair welding once in bond area. [J]. 50(10):50-56(2020)
DOI：

LI Changfan, HAO Yongkui, GU Dian, et al. Effect of single/double pass welded ioint performance of Q345E steel with repair welding once in bond area. [J]. 50(10):50-56(2020) DOI： 10.7512/j.issn.1001-2303.2020.10.10.

摘要

研究Q345E钢的4 mm单道及6 mm双道焊在焊缝熔合区一次补焊对接头性能的影响,通过拉伸、硬度、弯曲等力学性能试验分析了补焊对接头力学性能的影响。分析补焊前后焊缝区的室温金相组织;分析了原焊缝区与补焊后热影响重叠区域的金相组织;分别对比了经一、二次热循环的热影响区补焊前后的室温金相组织,为进一步评价接头性能提供了理论依据。

Abstract

This paper studies the repair welding once in bond area influence the welding joint of Q345E steel of 4 mm single and 6 mm double pass. Based on mechanical properties test such as tensile,hardness,bending for repair welding joint; the metallographic structure before and after repair welding was analyzed;the metallographic structureof overlapping position of the original weld zone and repaired welding HAZ was analyzed.The metallographic structure of the heat-affected zone before and after repair welding was compared with that of the heat-affected zone after the first and second heat cycles respectively. It provides theoretical basis for further evaluation of joint performance.