喷丸强度对船舶典型Q345钢十字型焊接接头残余应力分布的影响  

Effect of Shot Peening Intensity on Residual Stress Distribution of Typical Q345 Steel Cruciform Welded Joints on Ship

作　　者：贾青青 张晋晗 杨波[2] 刘华兵 汪舟[4] 甘进[1] JIA Qingqing;ZHANG Jinhan;YANG Bo;LIU Huabing;WANG Zhou;GAN Jin(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;Green and Smart River-Sea-Going Ship,Cruise and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,China;School of Automotive Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,武汉430063 [2]武汉理工大学交通与物流工程学院,武汉430063 [3]武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,武汉430063 [4]武汉理工大学汽车工程学院,武汉430063

出　　处：《机械工程材料》2024年第8期77-82,共6页Materials For Mechanical Engineering

基　　金：国家自然科学基金面上项目(52371335);湖北省自然科学基金青年项目(20231j0222)。

摘　　要：对船舶典型Q345钢十字型焊接接头进行了不同喷丸强度(0.167,0.183,0.198 mm)下的喷丸处理,研究了喷丸后接头残余应力表面和沿深度方向的分布以及疲劳寿命,确定了最优喷丸强度。结果表明:喷丸处理消除了焊接接头表面残余拉应力,引入了较高水平残余压应力,改善了表面残余应力分布均匀性,增加了残余应力影响层深度,延长了疲劳寿命;随着喷丸强度增加,引入的残余压应力增大,分布均匀性先提升后减小,残余应力影响层深度增加,疲劳寿命先延长再缩短;最优喷丸强度为0.183 mm,此时焊接接头表面残余压应力较大,分布均匀性最好,残余应力影响层深度较大,疲劳寿命最长。The typical Q345 steel cruciform welded joint on ship was treated by shot peening under different shot peening intensities(0.167,0.183,0.198 mmA).The surface and depth distribution of residual stress and fatigue life of joint after shot peening were studied,and the optimal shot peening process was obtained.The results show that after shot peening,the residual tensile stress on the surface of the welded joint was eliminated,the high level of residual compressive stress was introduced,the distribution uniformity of the surface residual stress was improved,the depth of the residual stress affected layer was increased,and the fatigue life was prolonged.With the increase of shot peening intensity,the introduced residual compressive stress increased,the distribution uniformity first increased and then decreased,the depth of the residual stress affected layer increased,and the fatigue life first prolonged and then was shortened.The optimal shot peening intensity was 0.183 mmA.Under this intensity the residual compressive stress on the welded joint surface was large,the distribution uniformity was the best,the depth of the residual stress affected layer was large,and the fatigue life was the longest.

关 键 词：Q345钢 十字型焊接接头 喷丸 残余应力 疲劳寿命 

分 类 号：TG176[金属学及工艺—金属表面处理]