Microstructure and Properties of Copper Cladding Aluminum Rod Fabricated by Horizontal Core-filling Continuous Casting

Su Yajun~1; Liu Xinhua~1; Wu Yongfu~1; Huang Haiyou~1; Xie Jianxin~1; Wang Lianzhong~2; Dong Xiaowen~2

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Microstructure and Properties of Copper Cladding Aluminum Rod Fabricated by Horizontal Core-filling Continuous Casting
Vol. 31, Issue 9, Pages: 785-790(2011)
Published： 2011 ，
DOI：

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[1]苏亚军,刘新华,吴永福,黄海友,谢建新,王连忠,董晓文.水平连铸直接复合成形铜包铝复合材料的组织与性能[J].特种铸造及有色合金,2011,31(09):785-790.

Su Yajun~1, Liu Xinhua~1, Wu Yongfu~1, et al. Microstructure and Properties of Copper Cladding Aluminum Rod Fabricated by Horizontal Core-filling Continuous Casting. [J]. Special Casting & Nonferrous Alloys 31(9):785-790(2011)
[1]苏亚军,刘新华,吴永福,黄海友,谢建新,王连忠,董晓文.水平连铸直接复合成形铜包铝复合材料的组织与性能[J].特种铸造及有色合金,2011,31(09):785-790. DOI：

Su Yajun~1, Liu Xinhua~1, Wu Yongfu~1, et al. Microstructure and Properties of Copper Cladding Aluminum Rod Fabricated by Horizontal Core-filling Continuous Casting. [J]. Special Casting & Nonferrous Alloys 31(9):785-790(2011) DOI：

摘要

研究了水平连铸直接复合成形铜包铝棒材的制备工艺和组织性能及退火处理对界面层塑性的影响。结果表明

采用水平连铸直接复合成形法在芯管长度L=210mm、铜铸造温度tCu=1230℃、铝铸造温度tAl=770～850℃、一次冷却水流量Q1=600L/h、二次冷却水流量Q2=600～800L/h、平均拉坯速度v=60～87mm/min的可行工艺窗口下能够制备出直径为30mm、铜包覆层厚度为3mm、质量良好的铜包铝复合棒材。在退火温度为530℃、保温时间为50min的工艺条件下

退火处理后可明显改善界面层的塑性。铜包铝复合棒材的抗拉强度和伸长率分别为80～94MPa和18%～31%。

Abstract

Processing parameters and microstructure as well as properties of copper cladding aluminum composite rod fabricated by horizontal core-filling continuous casting were investigated.Effects of annealing treatment on interface plasticity of CCA rod were observed.The desirable quality copper cladding aluminum composite rod with 30 mm in diameter and 3 mm in sheath thickness could be successfully produced in conditions of 210 mm in mandrel length

liquid copper temperature of 1 230 ℃

liquid aluminum temperature of 770

50 ℃

first cooling water volume of 600 L/h and secondary cooling water volume of 600

00 L/h as well as average pulling velocity of 60

7 mm/min.Plasticity of the interface can be greatly improved with annealing treatment at 530 ℃ for 50 min.Tensile strength and elongation of the copper cladding aluminum composite rod reach 80

4 MPa and 18%

respectively.