(College of Materials and Metallurgy, Northeastern University, Shenyang 110819, PR China)
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DOI:
10.7502/j.issn.1674-3962.2013.05.05
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Abstract:
Continuous casting and extrusion (CASTEX) is a further development of the CONFORM. The developing history, status quo, developing trend and application status of CASTEX technique are introduced in detail throughout the world. The metallic CASTEX principle and the calculation formulae of CASTEX forces established are briefly described. Three stages such as metallic dynamic solidification, semisolid processing and extrusion plastic deformation and the conversion mechanism of internal and external friction to transform as-cast microstructure into fine grain deformation microstructure are pointed out. Technique, the structure of CASTEX machine and the role of various components are described, and the models and technical parameters of part of CASTEX machines at home and abroad are listed. The effect of process parameters such as temperature, gap, rotary speed and cooling condition on the CASTEX process control is analyzed. The characteristics of CASTEX technique as compared with conventional extrusion is introduced. The pipes, bars, profiles and wires of aluminum and its alloys, and tin and its alloys have been made by CASTEX forming and CASTEX technique obtains industrial application; finally, the developing direction of new CASTEX technique is discussed.