大尺寸Al-Cu-Mg-Mn合金铸锭均匀化工艺研究

材料导报

2020, Vol. 34

Issue (Z1): 325-327

金属与金属基复合材料

大尺寸Al-Cu-Mg-Mn合金铸锭均匀化工艺研究

黄同瑊^1,2, 秦宇¹, 晁代义^1,2, 王志雄¹, 宋晓霖¹, 张华¹, 程仁策^1,2

1 山东南山铝业股份有限公司,龙口 265713;
2 国家铝合金压力加工工程技术研究中心,龙口 265713

Study on Homogenization Process of Large Size Al-Cu-Mg-Mn Alloy Ingot

HUANG Tongjian^1,2, QIN Yu¹, CHAO Daiyi^1,2, WANG Zhixiong¹, SONG Xiaolin¹, ZHANG Hua¹, CHENG Rence^1,2

1 Shandong Nanshan Aluminum Co., Ltd., Longkou 265713, China;
2 National Engineering Research Center for Plastic Working of Aluminium Alloys, Longkou 265713, China

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摘要本工作通过金相、DSC、SEM等手段研究了均匀化工艺对大尺寸Al-Cu-Mg合金扁锭的组织演变和力学性能的影响。研究结果表明,铸态合金中枝晶偏析从芯部区域到边部区域越来越严重,晶界分布大量的块状A₂Cu相和Al₂CuMg相。采用接近低熔点共晶融化温度进行均匀化退火后,选择合适的均匀化时间使得合金中的枝晶偏析基本消除,晶内成分分布较为均匀。经500 ℃/36 h均匀化后,残留第二相含量为0.88%,经过轧制变形后的薄板T42态的抗拉强度达到480 MPa,屈服强度达到327 MPa,延伸率为19%.

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关键词: 大尺寸Al-Cu-Mg合金均匀化退火成分均匀抗拉强度

Abstract: The microstructure evolution and property of large size Al-Cu-Mg-Mn alloy ingot during different homogenization were studied by optical microscopy (OM), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The results showed that the dendrite segregation in the as-cast alloy was more serious from the core region to the edge region. Near the low melting point homogenizing annealing and the proper time of homogenization was selected, which lead to the dendrite segregation was basically eliminated and the distribution of components was relatively uniform. Homogenization at 500 ℃/36 h, the residual second phase content was 0.88%. After the rolling deformation, the T42-state tensile strength of the alloy reached 480 MPa, the yield strength reached 327 MPa, and the elongation reached 19%.

Key words: large size Al-Cu-Mg alloy homogenizing annealing components uniform tensile strength

发布日期: 2020-07-01

ZTFLH:

TG142.71

作者简介: 黄同瑊, 2005年毕业于兰州理工大学金属材料专业学士学位,工程师。主要从事航空铝合金的轧制变形工艺研发;晁代义,2013年6月毕业于烟台大学,获得工学硕士学位。2013年9月到2017年3月于哈尔滨工业大学材料学院攻读博士学位。主要从事不锈钢及高强铝合金热处理及变形工艺研究以及金属材料失效分析。目前担任中国机械工程协会失效分析分会失效分析专家。

引用本文:

黄同瑊, 秦宇, 晁代义, 王志雄, 宋晓霖, 张华, 程仁策. 大尺寸Al-Cu-Mg-Mn合金铸锭均匀化工艺研究[J]. 材料导报, 2020, 34(Z1): 325-327.
HUANG Tongjian, QIN Yu, CHAO Daiyi, WANG Zhixiong, SONG Xiaolin, ZHANG Hua, CHENG Rence. Study on Homogenization Process of Large Size Al-Cu-Mg-Mn Alloy Ingot. Materials Reports, 2020, 34(Z1): 325-327.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2020/V34/IZ1/325

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