DC与CC 5052铝合金冷轧后沿厚度方向织构分布状态对比的X射线衍射分析

摘要

采用X射线衍射测试极图、使用专用软件计算织构取向分布函数(ODF),研究了热轧后454℃×4h再结晶退火的直接铸造5052铝合金板(DC5052)和双履带连续冷却铸造5052铝合金板(CC5052)冷轧制到不同压下量的试样,自表层至心部层的冷轧织构分布差别,为工业上生产及应用DC5052与CC5052铝合金冷轧板提供依据.结果显示:同样的大压下量时CC5052的β织构强度及体积分数高于DC5052的.冷轧前CC5052的再结晶织构Cube的体积分数小于DC5052的,剩余位向的体积分数多于DC5052的,导致CC5052表层的β织构强度及体积分数达到与1/4层、中心层接近所需要的冷轧压下量比DC50S2试样需要的小.CC5052冷轧板冲压加工方面的性能优于DC5052冷轧板.%To provide gist of DC AA 5052 and CC AA 5052 aluminum alloy to industry production and application,the texture variation of cold rolled sheets through thickness direction was studied by X-ray diffraction method,and the difference in texture at surface,quarter and center layer was analyzed.The hot plates of direct chill cast (DC) AA 5052 and continuous cast (CC) AA 5052 aluminum alloy were annealed at 454 ℃ for 4 hours and then cold rolled to different reductions.The strength and volume fraction of the fiber in CC AA 5052 aluminum alloy is larger than in DC AA 5052 aluminum alloy after same rolling reduction.The volume fraction of the recrystallization texture cube in the CC AA 5052 aluminum alloy is less than in the DC AA 5052aluminum alloy,which result in that 0C AA 5052 aluminum alloy needs less cold rolling reduction than DC AA 5052 aluminum alloy for generating the texture with same intensity and volume fraction at surface layer,quarter layer and center layer.The manufacturability and performance of CC AA 5052 aluminum alloy is superior to DC AA 5052 aluminum alloy for use in starm