近α钛合金多束流电子束焊接与热处理复合接头组织性能研究(英文)  

Microstructure and Properties of EBW and Heat Treatment with Multi-beam Technology for near α Titanium Alloy

作　　者：付鹏飞[1,2] 毛智勇[2] 唐振云[2] 左从进[2] 许海鹰[2] 

机构地区：[1]华中科技大学,湖北武汉430074 [2]北京航空制造工程研究所,北京1000240

出　　处：《稀有金属材料与工程》2013年第S2期97-101,共5页Rare Metal Materials and Engineering

基　　金：The National Natural Science Foundation(50935008);Special Major Science and Technology(2010ZX04007-041);Fund of Advanced Research(XXXXX4503021005)and(2010XX25006)Grant

摘　　要：针对近α钛合金,采用多束流电子束焊接与热处理复合技术来降低冷却速度,主要包括电子束预热+焊接、电子束焊接+缓冷等方法。采用多束流电子束焊接与热处理复合技术,钛合金焊缝成形良好,焊接裂纹、气孔等缺陷得到了降低。研究了钛合金复合焊接接头组织性能、显微硬度及拉伸性能等。结果表明,多束流电子束焊接与热处理复合焊缝组织粗化,显微硬度得到均匀化。与常规电子束焊接相比,多束流电子束焊接与热处理复合接头断后伸长率提高了30%。Simultaneous EB welding and heat treatment with multi-beam technology was investigated to diminish the cooling rate for near α titanium alloy,which included EBW simultaneously with preheating or post-heating.Welding figuration of simultaneous welding and heat treatment was favorable,and the welding cracks and porosities were reduced.The tests were carried on,including the microstructure,microhardness and tensile properties.The results show that the microstructure of the welds becomes coarser,and the microhardness is more homogeneous after simultaneous EB welding and heat treatment with multi-beam.Furthermore,the percentage elongation after fracture of the joints with simultaneous EBW and heat treatment is 30% more than that of conventional EB welding.

关 键 词：多束流 钛合金 组织 拉伸性能 

分 类 号：TG456.3[金属学及工艺—焊接] TG166.5