2A12铝合金均匀化处理工艺研究

【作者】 孙振宇； 冯彦波； 聂波； 赵刚； 田妮； 李瑞峰；

【机构】 山东兖矿轻合金有限公司； 东北大学材料学院；

【摘要】 本文采用电解铝液半连续铸造生产的铸锭,利用金相显微镜、扫描电镜及能谱分析、差示扫描量热法、读数显微镜和力学性能测试等手段,揭示该合金均匀化处理过程相和组织演变规律,结果表明:直径203mm的2A12合金半连续圆铸锭的过烧温度为501.7℃;采用497℃保温12h后缓慢升温(3℃/h)至527℃的均匀化处理能将所有的低熔点共晶产物全部溶入合金基体;均匀化处理后,A1CuFeMnSi相形状为无规则块状,而A1CuFeMn大都呈条状;2A12合金半连续圆铸锭经497℃均匀化处理时间由4小时延长至24小时对其塑性加工后材料的力学性能影响不大。更多还原

【Abstract】 This paper uses the electrolysis aluminum liquid semi continuous casting billet,using metallographic microscope, scanning electron microscope and energy spectrum analysis,differential scanning calorimetry,reading microscope and mechanical performance test,the transformation of the phase and structures during homogenization.The results are as follows: The overburning temperature of 2A12 semi-continuous billet with 203mm is 501.7℃.When the billet is homogenized for 12h at 497℃,and then increased to 527℃with the rate of 3℃/h,the low-melting-point eutectic structures could be completely dissolved into matrix.After homogenization,AlCuFeMn phase is in the shape of strip and AlCuFeMnSi phase is in the shape of irregular block.更多还原