电焊机2024，Vol.54Issue(8)：97-102,6.DOI:10.7512/j.issn.1001-2303.2024.08.13
焊趾熔修和超声冲击处理对船用钢焊接接头的影响
Influence of Weld Toe Repair and Ultrasonic Impact Treatment on the Welded Joints of Marine Steel
何亮 1贺智涛 1张蕾 1程彬 1马晓阳 1丁鹏龙1
作者信息
- 1. 中国船舶集团有限公司第七二五研究所,河南 洛阳 471023
- 折叠
摘要
Abstract
Aiming at the problem of weak performance and easy fatigue fracture of welded joints of Marine steel,three meth-ods were used to strengthen the welded joint of marine high-strength steel,including ultrasonic impact,weld toe repair and weld toe repair+ultrasonic impact composite treatment.The residual stress,stress concentration factor and fatigue perfor-mance of the joint strengthened by different processes were compared and studied.The results show that:(1)ultrasonic im-pact treatment can effectively reduce the residual stress of the joint and form beneficial compressive stress on the surface,while weld toe repair can not improve the residual stress of the joint,and even slightly increase the residual stress;(2)All three treatment processes can reduce the stress concentration at the weld toe,and the weld toe repair treatment can signifi-cantly reduce the stress concentration coefficient;(3)All the three treatment processes can improve the low-cycle fatigue per-formance of the joint.The fatigue life of the joint is increased by 58%after ultrasonic impact treatment,by 249%after weld toe repair,and by 460%after weld toe repair combined with ultrasonic impact treatment.The compound treatment process of weld toe repair and ultrasonic impact gives consideration to the advantages of weld toe repair and ultrasonic impact treat-ment,which can not only significantly reduce the stress concentration of weld toe,but also obtain beneficial residual com-pressive stress,and can be applied to strengthening key parts of ship welded structure.关键词
超声冲击/焊趾熔修/残余应力/疲劳性能/焊接接头Key words
ultrasonic impact/weld toe repair/residual stress/fatigue performance/weld joint分类
矿业与冶金引用本文复制引用
何亮,贺智涛,张蕾,程彬,马晓阳,丁鹏龙..焊趾熔修和超声冲击处理对船用钢焊接接头的影响[J].电焊机,2024,54(8):97-102,6.
