摘要
研究了近等温锻造温度对Ti2AlNb/Ti60双合金焊接接头显微组织和力学性能的影响。结果表明:经不同温度近等温变形及相同热处理后,Ti2AlNb/Ti60双合金试样焊缝组织得到明显细化,强度和塑性得到提高,均高于基体Ti60合金;随着变形温度的升高,Ti60合金热影响区显微组织中初生等轴α相逐渐减少,β转组织增多,片状α相变短变粗。因此,合金的室温拉伸强度逐渐升高,塑性逐渐下降;变形温度为1010℃的试样,其焊缝熔合区显微组织较为均匀,塑性相B2含量较多,焊件室温及600℃高温拉伸均表现出较好的强度与塑性匹配。
The effects of deformation temperature of close isotemperature forging on the microstructure and mechanical property of the joint by electron beam welded （EBW） Ti2A1Nb/Ti60 dual alloys were investigated. The results show the following： after deformation at different temperature of close isotemperature forging followed by the same heat treatment, the microstructure of electron beam welded joint of Ti2A1Nb/Ti60 dual alloys is refined obviously, and the strength and ductility of welded joint are obviously enhanced, which are higher than that of Ti60 alloy substrate; with the increase of deformation temperature, the spherical α phase content decreases gradually, beta turning microstructure increases and strip α phase gets shorter and thicker in the heat affected zone of Ti60 alloy. This phenomenon causes the intensity of alloy increases and the plasticity decreases in the tensile test at room-temperature; at the deformation temperature of 1010 ℃, the microstructure of the welded bond area is well distributed, the plastic phase B2 content is more, and the welded specimens generally show a good match between strength and plasticity in the tensile test at room-temperature and 600 ℃.
出处
《热加工工艺》
CSCD
北大核心
2013年第1期20-22,26,共4页
Hot Working Technology
作者简介
作者简介：田宏杰0987-），男，甘肃庆阳人，硕士，主要研究方向：有色合金成形工艺；电话：02988493744；E-mail：mj88thj@163．com
