Joining of TiAl and steels by induction brazing
Joining of TiAl and steels by induction brazing
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DOI：
10.1016/s0921-5093(97)00638-2
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发表时间：
1997-12
期刊：
影响因子：
6.4
通讯作者：
T. Noda;T. Shimizu;M. Okabe;T. Iikubo
中科院分区：
文献类型：
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作者：
T. Noda;T. Shimizu;M. Okabe;T. Iikubo
为了开发低成本、高强度的TiAl与结构钢连接技术，研究了快速感应钎焊技术。选择63 Ag-35.2 Cu-1.8 Ti质量%（CUSIL-ABA）的活性银基钎料和70 Ti-15 Cu-15 Ni质量%（TICUNI）的钛基钎料。作为连接材料，使用结构钢AISI 4340和成分为Ti-33.5Al-0.5Cr-1 Nb-0.5Si（质量%）的铸造TiAl。钎焊温度和保温时间固定在15 K以上的填充金属的液相线温度为30秒。TICUNI的熔融钎料与母材的反应强于CUSIL-ABA。此外，在AISI 4340和钎焊金属的界面处形成了在CUSIL-ABA的钎焊金属中未观察到的碳化物层。由于在AISI 4340和钎焊金属的界面处形成碳化物层，使用TICUNI的接头的强度劣于使用CUSIL-ABA的接头的强度。采用CUSIL-ABA钎料进行快速感应钎焊，接头室温强度为320 MPa，773 K时强度为310 MPa。
In order to develop the joining technology of TiAl and structural steels which gives a low cost and high strength joint, rapid induction brazing was investigated. The active silver based filler metal of 63Ag–35.2Cu–1.8Ti mass% (CUSIL-ABA) and the titanium based filler metal of 70Ti–15Cu–15Ni mass% (TICUNI) were selected. As joining materials, the structural steel AISI4340 and cast TiAl with composition of Ti–33.5Al–0.5Cr–1Nb–0.5Si (mass%) were employed. Brazing temperature and holding time were fixed at 15 K above the liquidus temperature of the filler metals for 30 s. The reactions of the molten filler metal of TICUNI with the base metals were stronger than that of CUSIL-ABA. In addition, a carbide layer, not observed in the brazed metal of CUSIL-ABA, was formed at the interface of AISI4340 and the brazed metal. The strength of the joint using TICUNI was inferior to that of CUSIL-ABA due to the formation of the carbide layer at the interface of AISI4340 and the brazed metal. By rapid induction brazing using CUSIL-ABA filler, a joint strength of 320 MPa at room temperature and 310 MPa at 773 K was obtained.