CAJ | 학술논문

进行了钛合金与不锈钢采用铌中间层的真空热轧连接实验，分析了连接界面的显微组织及性能。结果表明，采用铌中间层能够明显提高接头的塑性。当压缩率为25%，轧制速度为38 mm/s，热轧温度为800°C和900°C时，不锈钢与铌的连接界面没有明显的金属间化合物层；当热轧温度为1000°C和1050°C时，不锈钢与铌连接界面形成Fe-Nb金属间化合物层，并且当热轧温度为1050°C时在金属间化合物层与不锈钢之间出现开裂。铌与钛合金连接界面的扩散层厚度随着热轧温度的升高而增大。热轧温度为900°C的连接接头的拉伸强度可达~417.5 MPa，拉伸试样断裂于铌中间层，断口呈塑性断裂特征。热轧温度为800°C的热轧过度接头分别与钛合金和不锈钢进行TIG焊接，TIG焊后热轧过度接头的拉伸强度可达~410.3 MPa，拉伸试样断裂于铌中间层，断口呈塑性断裂特征。
진행료태합금여불수강채용니중간층적진공열알련접실험，분석료련접계면적현미조직급성능。결과표명，채용니중간층능구명현제고접두적소성。당압축솔위25%，알제속도위38 mm/s，열알온도위800°C화900°C시，불수강여니적련접계면몰유명현적금속간화합물층；당열알온도위1000°C화1050°C시，불수강여니련접계면형성Fe-Nb금속간화합물층，병차당열알온도위1050°C시재금속간화합물층여불수강지간출현개렬。니여태합금련접계면적확산층후도수착열알온도적승고이증대。열알온도위900°C적련접접두적랍신강도가체~417.5 MPa，랍신시양단렬우니중간층，단구정소성단렬특정。열알온도위800°C적열알과도접두분별여태합금화불수강진행TIG한접，TIG한후열알과도접두적랍신강도가체~410.3 MPa，랍신시양단렬우니중간층，단구정소성단렬특정。
The hot-roll bonding was carried out in vacuum between titanium alloy and stainless steel using niobium interlayer. The interfacial structure and mechanical properties were analyzed. The results show that the plasticity of bonded joint is improved significantly. When the bonding temperature is 800 °C or 900 °C, there is not intermetallic layer at the interface between stainless steel and niobium. When the bonding temperature is 1000 °C or 1050 °C, Fe-Nb intermetallic layer forms at the interface. When the bonding temperature is 1050 °C, cracking occurs between stainless steel and intermetallic layer. The maximum strength of~417.5 MPa is obtained at the bonding temperature of 900 °C, the reduction of 25%and the rolling speed of 38 mm/s, and the tensile specimen fractures in the niobium interlayer with plastic fracture characteristics. When the hot-roll bonded transition joints were TIG welded with titanium alloy and stainless steel respectively, the tensile strength of the transition joints after TIG welding is~410.3 MPa, and the specimen fractures in the niobium interlayer.