宇航材料工艺2024，Vol.54Issue(3)：98-102,5.DOI:10.12044/j.issn.1007-2330.2024.03.013
起重船用高强钢大厚板焊接残余应力的试验研究
Experimental Study on Welding Residual Stress of High Strength Steel Plate for Crane Ship
摘要
Abstract
This research focuses on the structure of a certain type of crane ship.It adopts post-weld heat treatment as a measure to eliminate welding residual stress and studies the residual stress status of the structure as well as the effectiveness of the elimination measures.Firstly,two groups of test plates in welding state and after post-weld heat treatment were used to detect and compare the welding residual stress.The results showed that the maximum longitudinal residual stress of the test plate in welding state reached 552.5 MPa,close to the yield strength of the material.The maximum longitudinal residual stress of the test plate after post-weld heat treatment was 385.3 MPa,reduced by 167.2 MPa compared with the welding state,a decrease of about 30％.At the same time,the distribution of residual stress was obtained.Furthermore,post-weld heat treatment was applied to the weld seams of the crane ship's guide base structure,and stress detection was conducted.The maximum longitudinal welding residual stress was 310.8 MPa,far below the yield strength of the base material.The research indicates that the welding residual stress of the heavy-gauge steel plates in the crane ship is relatively high in the welding state,and measures need to be taken to eliminate the residual stress.Post-weld heat treatment can significantly reduce the level of welding residual stress in heavy-gauge steel plates,which is both economical and easy to operate.Therefore,post-weld heat treatment isrecommended for weld seams of heavy-gauge steel plates during the construction of crane ships to eliminate welding residual stress.关键词
起重船/高强钢/焊接残余应力/后热Key words
Crane ship/High-strength steel/Welding residual stress/Post-heat分类
矿业与冶金引用本文复制引用
王信,刘勇,王斌..起重船用高强钢大厚板焊接残余应力的试验研究[J].宇航材料工艺,2024,54(3):98-102,5.基金项目
四川省教育厅科研项目(17ZB0501) （17ZB0501）
上海市科委科研计划项目资助(15dz1101011) （15dz1101011）
四川省教育厅科研项目"E型环疲劳试验装置的设计与开发"(18ZB0663) （18ZB0663）
ybzy21cxtd-01智能采摘机器人科技创新团队 （）
