Wu Y.-F.,University of Science and Technology Beijing |
Liu X.-H.,University of Science and Technology Beijing |
Xie J.-X.,University of Science and Technology Beijing |
Wang L.-Z.,Yantai Fisend Bimetal Co. |
Dong X.-W.,Yantai Fisend Bimetal Co.
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2012
Copper cladding aluminum (CCA) composite materials with the section dimensions of 50 mm×30 mm and the sheath thickness of 3 mm were fabricated by horizontal core-filling continuous casting (HCFC) technology. The effects of the crystallizer length, withdrawing speed, mandrel tube length and flux of the primary cooling water were studied. The results show that when the crystallizer length is 150 mm and the mandrel tube length is 125 mm, the rational withdrawing speed is 75-90 mm/min. Too low withdrawing speed leads to the discontinuous filling process of liquid aluminum, which causes shrinkage or cold shuts. Conversely, too high withdrawing speed results in serious interface reaction between copper and aluminum. At the withdrawing speed of 75 mm/min, the rational primary cooling water is 700 L/h. The flux of primary cooling water above 1000 L/h leads to the discontinuous filling process of the liquid aluminum, but the flux of primary cooling water below 400 L/h leads to severe interface reaction. The filling behavior of the liquid aluminum and the stability of the continuous casting can be controlled by monitoring the temperature variation of the graphite mould at the position corresponding to the outset of the mandrel tube.
Yajun S.,University of Science and Technology Beijing |
Xinhua L.,University of Science and Technology Beijing |
Yongfu W.,University of Science and Technology Beijing |
Haiyou H.,University of Science and Technology Beijing |
And 3 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2011
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 °C, liquid aluminum temperature of 770 ∼ 850 °C, first cooling water volume of 600 L/h and secondary cooling water volume of 600∼800 L/h as well as average pulling velocity of 60∼87 mm/min. Plasticity of the interface can be greatly improved with annealing treatment at 530 °C for 50 min. Tensile strength and elongation of the copper cladding aluminum composite rod reach 80∼94 MPa and 18%∼31%, respectively.