高增,巴现礼,杨环宇,尹聪鑫,牛济泰.SiCp/AlMMCs填充含Sc、Ce、Be的TiB2原位增强焊丝与4047焊丝的TIG焊研究[J].稀有金属材料与工程,2020,49(10):3465~3471.[Gao Zeng,Ba Xianli,Yang Huanyu,Yin Congxin,NiuJitai.Study on TIG Welding of TiB2 in situ reinforced Wire and 4047 Wire filled with Sc,Ce,Be filled with SiCp/AlMMCs[J].Rare Metal Materials and Engineering,2020,49(10):3465~3471.]
SiCp/AlMMCs填充含Sc、Ce、Be的TiB2原位增强焊丝与4047焊丝的TIG焊研究
投稿时间:2019-09-29  修订日期:2019-10-28
中文关键词:  SiCp/6061Al复合材料  TIG焊  原位增强  稀土元素  力学性能  显微组织。
基金项目:河南省科技攻关项目资助(182102210312);河南省高等学校重点科研资助项目(15A430007)
中文摘要:
      使用自制的含Sc、Ce、Be的TiB2原位增强与4047焊丝为填充材料对T6态SiCp/AlMMCs 进行TIG焊,对接头的力学性能、显微组织以及断口形貌和第二相粒子进行分析。结果表明:两种焊丝焊接该种材料的焊缝成型优良,4047焊丝成型更加美观;TiB2接头的抗拉强度明显优于ER4047接头,平均强度达到171.88MPa,相对于4047接头强度提高40.03%,TiB2粒子起到了原位增强的作用;两种接头的硬度值在焊缝中心近似呈对称分布,焊缝区硬度最低,平均值分别为:71.65HV、60.02HV,热影响区硬度的“过时效”现象明显;焊缝中SiC颗粒较少,存在严重贫瘠区 ,未发现明显的Al4C3脆性物;显微组织都为枝晶组织,但4047接头焊缝枝晶粗大,TiB2接头焊缝晶粒细小,稀土元素Sc、Ce、Be起到了细化晶粒的作用,且TiB2粒子在焊缝中分布均匀;TiB2接头断口中气孔较少,为韧-脆性混合性断裂,韧窝中第二相粒子较多;4047接头断口中气孔较多,为韧性断裂,韧窝中第二相粒子较少。
Study on TIG Welding of TiB2 in situ reinforced Wire and 4047 Wire filled with Sc,Ce,Be filled with SiCp/AlMMCs
英文关键词:SiCp/6061Al composites  TIG welding  in situ reinforcement  rare earth elements  mechanical properties  microstructure
英文摘要:
      The mechanical properties, microstructure, fracture morphology and second phase particles of T6 state SiCp/AlMMCs were analyzed by using self-made TiB2 in situ reinforcement and 4047 welding wire as filling materials for TIG welding of T6 state SiCp/AlMMCs. The results show that the weld forming of the two kinds of welding wires is excellent, and the 4047 welding wire is more beautiful, and the tensile strength of TiB2 joint is obviously better than that of ER4047 joint, and the average strength is 171.88 MPA, which is 40.03% higher than that of 4047 joint. TIB2 particles play an in-situ strengthening role. The hardness values of the two joints are approximately symmetrical in the center of the weld, and the hardness of the weld zone is the lowest, the average value is 71.65HV,60.02HV. the "overaging" phenomenon of the hardness in the heat affected zone is obvious, the SiC particles in the weld are less, there is a serious barren zone, and no obvious Al4C3 brittleness is found. The microstructure is dendritic structure, but the dendritic grain of 4047 joint is coarse, the grain size of TiB2 joint is fine, the rare earth element Sc,Ce,Be plays the role of refining grain, and the TiB2 particles are evenly distributed in the weld, and the pores in the fracture surface of TiB2 joint are few, which is tough. The brittle mixed fracture shows that there are more particles in the second phase in the dimple, and there are more pores in the fracture surface of the 4047 joint, which is ductile fracture, and the second phase particles in the dimple are less.
作者单位E-mail
高增 河南理工大学材料科学与工程学院 mrgaozeng@163.com 
巴现礼 河南理工大学材料科学与工程学院 1475716773@qq.com 
杨环宇 河南理工大学材料科学与工程学院  
尹聪鑫 河南理工大学材料科学与工程学院  
牛济泰 河南理工大学材料科学与工程学院哈尔滨工业大学材料学院  
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