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作 者:陈铃 隋荣娟 陈颂英[2] 郭蕊 侯文捷 CHEN Ling;SUI Rongjuan;CHEN Songying;GUO Rui;HOU Wenjie(School of Construction Machinery,Shandong Jiaotong University,Jinan 250357,China;School of Mechanical Engineering,Shandong University,Jinan 250061,China;Jinan Heavy Industry Group Co,Jinan 250109,China)
机构地区:[1]山东交通学院工程机械学院,山东济南250357 [2]山东大学机械工程学院,山东济南250061 [3]济南重工集团有限公司,山东济南250109
出 处:《兵器材料科学与工程》2024年第6期74-79,共6页Ordnance Material Science and Engineering
基 金:山东省自然科学基金(ZR2021ME161);山东省科技型中小企业创新能力提升工程项目(2023TSGC0290)。
摘 要:为研究超声冲击处理对Q355B钢焊接接头的影响,通过组织观察、残余应力测试、显微硬度测试和耐磨性测试,分析超声冲击对焊接接头残余应力、耐磨性的改善。结果表明:超声冲击可细化材料近表面晶粒,使焊接接头表面残余应力由拉应力转变为压应力,且对横向残余应力的调控更有效,应力降幅为339 MPa;超声冲击也能够提高材料表面硬度,与原试样相比,冲击后硬度提高了38HV;与原试样比较,100℃下超声冲击试样的摩擦因数降低了0.15,磨损率降低了14%,磨损机理从单一的磨粒作用转变为包含磨粒、粘着两种因素的复合作用。超声冲击后表面出现塑性变形,表面晶粒细化,引入了残余压应力,同时形成了硬化层,使焊接接头在100℃下的耐磨性提升。In order to study the influence of ultrasonic impact treatment on welded joints of Q355B steel,the improvement of ultrasonic impact on residual stress and wear resistance of welded joints was analyzed through tissue observation,residual stress test,microhardness test and wear resistance test.The results show that ultrasonic impact can refine the near-surface grains,change the surface residual stress from tensile stress to compressive stress,and regulate the lateral residual stress more effectively,with a stress reduction of 339 MPa.Ultrasonic impact can also improve the surface hardness of the material,and the hardness after impact is increased by 38HV compared with the original.Compared with the original sample,the friction factor and wear rate of the ultrasonic impact sample at 100℃are reduced by 0.15 and 14%,and the wear mechanism changes from a single abrasive action to a composite action involving abrasive and adhesive factors.After ultrasonic impact,the surface deformation occurs,the surface grain is refined,the residual compressive stress is introduced,and the hardened layer is formed,which improves the wear resistance of the welded joint at 100℃.
分 类 号:TG663[金属学及工艺—金属切削加工及机床]
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