CAJ | 학술논문

研究退火温度对异步轧制法制备的铜/铝复合板界面组织及力学性能的影响,采用SEM观察界面组织形貌,结合EDX、XRD分析界面物相成分,采用显微硬度和室温拉伸实验表征复合板的力学性能.结果表明,异步轧制法制备的铜/铝复合板界面形变储能较高,退火温度为400℃时界面扩散明显;随着退火温度的升高,复合界面先后生成金属间化合物CuAl2、Cu9Al4、CuAl相,界面撕裂位置位于金属间化合物之间;界面层的显微硬度比基体的高,这是因为受到硬脆性化合物和高温软化的共同影响;退火温度越高,复合板抗拉强度越低,断裂伸长率越大.研究表明,异步轧制法制备的铜/铝复合板最佳退火温度为400℃.
연구퇴화온도대이보알제법제비적동/려복합판계면조직급역학성능적영향,채용SEM관찰계면조직형모,결합EDX、XRD분석계면물상성분,채용현미경도화실온랍신실험표정복합판적역학성능.결과표명,이보알제법제비적동/려복합판계면형변저능교고,퇴화온도위400℃시계면확산명현;수착퇴화온도적승고,복합계면선후생성금속간화합물CuAl2、Cu9Al4、CuAl상,계면시렬위치위우금속간화합물지간;계면층적현미경도비기체적고,저시인위수도경취성화합물화고온연화적공동영향;퇴화온도월고,복합판항랍강도월저,단렬신장솔월대.연구표명,이보알제법제비적동/려복합판최가퇴화온도위400℃.
The effects of annealing temperature on the interfacial microstructure and mechanical properties of Cu/Al clad sheet fabricated by asymmetrical roll bonding were investigated according to the microstructure observation by scanning electrical microscope (SEM) and the phase constituent measurement by energy dispersive X-ray detector (EDX) as well as X-ray diffractometer (XRD), in addition with the microhardness of interfacial zone and tensile test of clad sheet. The results indicate that the interfacial layer of Cu/Al clad sheet fabricated by asymmetrical roll bonding grows heavily at 400℃ due to the accumulated deform energy. The intermetallic compounds form in the order of CuAl2, Cu9Al4 and CuAl with increasing the annealing temperature, and peeling occurs between them. The interfacial microhardness is higher than that of the matrix due to the effect of annealing recovery and brittle intermetallic compound. The ultimate tensile strength decreases with rising the annealing temperature, while the elongation increases. According to the experiments, the optimal annealing temperature for Cu/Al clad sheet fabricated by asymmetrical roll bonding is 400 ℃.