焊接接头与结构疲劳延寿技术研究进展综述  

Research Review on Fatigue Life Improvement of Welding Joint and Structure

作　　者：王东坡[1] 龚宝明[1] 吴世品[1] 张海[1] 冯延焉 

机构地区：[1]天津大学材料科学与工程学院,天津300072

出　　处：《华东交通大学学报》2016年第6期1-14,共14页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(51275343;51375331)

摘　　要：对焊接接头与结构疲劳延寿技术的相关现状和进展进行全面叙述,一方面依据相关国际规范介绍了焊趾打磨、TIG熔修、锤击、针式冲击等传统经典焊接结构疲劳延寿技术的使用方法与技巧,同时超声冲击和低相变点材料疲劳延寿技术的最新研究进展也进行了详细论述。认为今后相当长一段时间,在国际上关于焊接结构疲劳延寿新技术的研究仍然是热点之一。锤击与超声冲击工艺性缺陷的产生机理及其影响因素;低相变点焊缝韧性提升与残余奥氏体稳定性问题及其母材稀释对低相变点焊缝组织演变影响问题;疲劳延寿处理结构设计与评价问题、复杂载荷条件下疲劳延寿效果稳定性及其保障问题等今后要继续开展相关研究工作,推动焊接结构疲劳延寿技术在高端装备制造产业中越来越广泛应用。The current status and development of fatigue life improvement technology of welding joint and struc- ture was reviewed in this paper. The specifications for the practical use of the traditional welding improvement methods such as weld toe grinding, TIG dressing, hammer peening and needle peening were introduced accord- ing to the international guidelines. The recent development about the methods of ultrasonic peening and low transformation temperature welding material were also discussed in details. It is thought that the fatigue life im- provement technology of welding structure is still the international focus for a quite long period in future. More researches need to be conducted in the following areas： the mechanism and influencing factors of defects forming during hammer peening and ultrasonic peening process; the toughness increase of welding metal, the stability of retained austenite and the effect of base metal dilution on the microstrueture of weld metal for low transformation temperature welding material; the design and evaluation of the structure treated by the improvement methods; the stability of the fatigue life improvement under complex load. It maintains that fatigue life improvement teehnolo- gy can be more widely used in high-end manufacturing industries.

关 键 词：焊接结构 疲劳延寿 超声冲击 TIG熔修 磨削 

分 类 号：TG405[金属学及工艺—焊接]