(1. 東北大學(xué) 軋制技術(shù)及連軋自動(dòng)化國家重點(diǎn)實(shí)驗(yàn)室，沈陽 110819；
2. 首鋼京唐有限公司，唐山 063200)
摘 要: 利用真空軋制復(fù)合技術(shù)900 ℃時(shí)制備TA2與304L不銹鋼的復(fù)合鋼板，分別研究直接復(fù)合及加入Nb夾層后復(fù)合界面的組織與性能，分析Nb夾層對(duì)復(fù)合板組織及性能的影響。結(jié)果表明：直接復(fù)合的Ti-不銹鋼復(fù)合板界面生成了Fe2Ti、Cr2Ti及NiTi2等多種金屬間化合物，嚴(yán)重削弱界面的結(jié)合強(qiáng)度，界面的剪切強(qiáng)度僅為128 MPa，性能較差。加入Nb層后，Ti與不銹鋼之間的互擴(kuò)散被完全阻止，且Nb夾層與兩側(cè)金屬均產(chǎn)生良好的結(jié)合；Nb、Ti界面未生成任何金屬間化合物，Nb與不銹鋼界面有FeNb金屬間化合物生成；界面剪切強(qiáng)度獲得大幅提升，達(dá)到338 MPa，性能優(yōu)良。
關(guān)鍵字: TA2鈦；304L不銹鋼；真空軋制復(fù)合；界面；金屬間化合物；Nb夾層；剪切強(qiáng)度
（1. State Key Laboratory of Rolling and Automation, Northeastern University, Shengyang 110819, China;
2. Shougang Jingtang Iron and Steel Co., Ltd., Tangshan 063200, China）
Abstract:The vacuum hot-roll bonding was carried out between TA2 titanium (Ti) and 304L stainless steel (SS) at 900 ℃. The vacuum hot-rolling bonding without interlayer and with niobium (Nb) interlayer was investigated, respectively. The microstructure and property of the interfaces were in-depth studied and the effect of the Nb interlayer was analyzed. The results show that many intermetallic compounds (IMC) are formed on the direct bonded Ti-SS interface, such as Fe2Ti, Cr2Ti and NiTi2. These IMC seriously weaken the shear strength, and lower shear strength of about 128 MPa is achieved. Inserting the Nb interlayer can effectively prevent the interdiffusion between Ti and SS. No IMC is found at Ti-Nb interface while IMC of FeNb is found at Nb-SS interface. The shear strength of about 338 MPa is achieved. The property of the clad plate is substantially enhanced by inserting Nb interlayer.
Key words: TA2 titanium; 304L stainless steel; vacuum hot-roll bonding; interface; intermetallic compound; Nb interlayer; shear strength
