以Ag Cu Ni Li为钎料对TiAl与40Cr进行了高频感应钎焊,研究了TiAl/40Cr钎焊接头的界面组织和力学性能。采用扫描电镜、电子探针、X射线能谱分析仪等分析了界面组织及生成相,测试了接头的抗拉强度及界面生成相的显微硬度。结果表明:钎料...以Ag Cu Ni Li为钎料对TiAl与40Cr进行了高频感应钎焊,研究了TiAl/40Cr钎焊接头的界面组织和力学性能。采用扫描电镜、电子探针、X射线能谱分析仪等分析了界面组织及生成相,测试了接头的抗拉强度及界面生成相的显微硬度。结果表明:钎料与2种母材发生界面生反应成Al3Ti、Ag[s,s]、Ti(CuAl)2、Ti2Ni和TiC等多种反应相,接头界面结构Al/A为Til3Ti/Al3Ti+Ag[s,s]/Ti(CuAl)2+Ti2Ni+Ag[s,s]/TiC/40Cr。在实验所选的工艺参数范围内,当连接温度θ=850℃,保温时间t=180s时,接头的抗拉强度达到265MPa。展开更多
Intermetallics TiAl was diffusion-bonded to steel 40Cr in vacuum furnace with interlayer V/Cu. The results show that infinite sosoloid that made for bond performance is formed at the interface of V/Cu and Cu/40Cr, and...Intermetallics TiAl was diffusion-bonded to steel 40Cr in vacuum furnace with interlayer V/Cu. The results show that infinite sosoloid that made for bond performance is formed at the interface of V/Cu and Cu/40Cr, and three acting layers are formed at the interface of TiAl/V including Ti 3Al layer at TiAl side, intermittent V 5Al 8 layer in the middle and Ti-V sosoloid at V side. Fragile reactors V 5Al 8 arising at the interface lead to bad performance of joints, and the strength of the joint is 200 MPa, while it was still higher than the strength of the joint intermetallics TiAl to 40Cr steel diffusion-bonded directly. Intermetallic TiAl and 40Cr steel are diffusion-bonded successfully by using a composite isolation layer V/Cu.展开更多
文摘以Ag Cu Ni Li为钎料对TiAl与40Cr进行了高频感应钎焊,研究了TiAl/40Cr钎焊接头的界面组织和力学性能。采用扫描电镜、电子探针、X射线能谱分析仪等分析了界面组织及生成相,测试了接头的抗拉强度及界面生成相的显微硬度。结果表明:钎料与2种母材发生界面生反应成Al3Ti、Ag[s,s]、Ti(CuAl)2、Ti2Ni和TiC等多种反应相,接头界面结构Al/A为Til3Ti/Al3Ti+Ag[s,s]/Ti(CuAl)2+Ti2Ni+Ag[s,s]/TiC/40Cr。在实验所选的工艺参数范围内,当连接温度θ=850℃,保温时间t=180s时,接头的抗拉强度达到265MPa。
文摘Intermetallics TiAl was diffusion-bonded to steel 40Cr in vacuum furnace with interlayer V/Cu. The results show that infinite sosoloid that made for bond performance is formed at the interface of V/Cu and Cu/40Cr, and three acting layers are formed at the interface of TiAl/V including Ti 3Al layer at TiAl side, intermittent V 5Al 8 layer in the middle and Ti-V sosoloid at V side. Fragile reactors V 5Al 8 arising at the interface lead to bad performance of joints, and the strength of the joint is 200 MPa, while it was still higher than the strength of the joint intermetallics TiAl to 40Cr steel diffusion-bonded directly. Intermetallic TiAl and 40Cr steel are diffusion-bonded successfully by using a composite isolation layer V/Cu.
