岳喜山,谢宗蕻,徐文豪.TC4/30CrMnSiNi2A钎焊接头组织与力学性能分析[J].稀有金属材料与工程,2019,48(9):3035~3040.[Yue Xishan,Xie Zonghong,Xu Wenhao.Microstructure and mechanical property of TC4/30CrMnSiNi2A dissimilar materials brazed joints[J].Rare Metal Materials and Engineering,2019,48(9):3035~3040.]
TC4/30CrMnSiNi2A钎焊接头组织与力学性能分析
投稿时间:2018-04-10??修订日期:2018-05-18
中文关键词:??TC4钛合金??30CrMnSiNi2超高强钢??钎焊??组织??力学性能
基金项目:
中文摘要:
??????采用Ti-37.5Zr-15Cu-10Ni和 Ag-Cu28两种钎料分别对TC4钛合金/30CrMnSiNi2超高强钢异种材料进行了钎焊,对钎焊界面组织以及接头的力学性能进行了分析。结果表明:Ag基钎料钎焊TC4与30CrMnSiNi2A异种材料时,钎缝界面组织为Ag(s,s)+Ti-Cu系化合物组成;因Ag固溶体的存在,钎缝具有一定的韧性,接头剪切强度较高,剪切断口呈现出韧性断裂特征。Ti基钎料钎焊TC4与30CrMnSiNi2A异种材料时,钎缝界面组织为Ti-Zr固溶体+未完全反应凝固钎料,钎缝显微硬度较高,接头剪切强度较低,呈现出脆性断裂特征。Ag基钎料TC4/30CrMnSiNi2A异种材料钎焊接头力学性能明显优于Ti基钎料结果,在钎焊温度830℃,保温时间15min时,剪切强度为125.52MPa。
Microstructure and mechanical property of TC4/30CrMnSiNi2A dissimilar materials brazed joints
英文关键词:TC4 titanium??alloy, 30CrMnSiNi2 ultra-high??strength steel, brazing, microstructure, mechanical??property
英文摘要:
??????TC4 titanium alloy was brazed to 30CrMnSiNi2A ultra-high strength steel by Ti-37.5Zr-15Cu-10Ni and Ag-Cu28 brazing filler metals respectively. Microstructure and mechanical property of both brazed joints were analyzed comparatively. Results show that Ag-Cu28 brazed interface is composed of Ag(s,s) and intermetallic compounds in Ti-Cu system. Ag-Cu28 brazed joint has relatively high shear strength due to the exisitence of Ag based solid solution and the shear fracture shows the characteristics of ductile fracture. Ti-37.5Zr-15Cu-10Ni brazed interface consists of Ti-Zr solid solution and solidified brazing filler metals, which lead to the low hear strength of brazed joint. The shear fracture of Ti-37.5Zr-15Cu-10Ni brazed joint shows the characteristics of brittle fracture. Compared with Ti-based brazing filler metal, Ag-based brazing filler metal is suitable for brazing TC4 titanium / 30CrMnSiNi2A ultra-high strength steel dissimilar materials. Sound brazed joints with the shear strength of 125.52MPa can be attained at the brazing temperature of 830℃ with the bolding time of 15 min by Ag-Cu28 brazing filler metals.
作者单位E-mail
岳喜山?西北工业大学 航天学院?yuexs_0@163.com?
谢宗蕻?西北工业大学航天学院??
徐文豪?西北工业大学航天学院??
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