摘要
金属连续铸挤技术(CASTEX)是金属连续挤压技术(CONFORM)的进一步发展。较详细地介绍了国内外金属连续铸挤技术的发展历史、现状、趋势以及应用状况。介绍了金属连续铸挤原理及铸挤力能参数的计算公式,并指出连续铸挤过程所形成的金属动态结晶-半固态加工-挤压塑性变形3个阶段及内、外摩擦转换机制,使金属由铸态组织逐渐变为细小的变形组织;简述了连续铸挤机的结构及各部件的作用,并列出了国内外部分铸挤机设备的型号与参数,分析了连续铸挤过程铸挤温度、运转间隙、设备转数及冷却条件等工艺参数对实现连续铸挤工艺控制的影响;讨论了连续铸挤技术同常规挤压比较所具备的特点,实现了铝及其合金,锡及其合金的管、棒、型、线材等的连续铸挤加工成形,在工业生产上得到了应用;最后指出了连续铸挤新技术的发展方向。
Continuous casting and extrusion （CASTEX） is a further development of the CONFORM. The developing his- tory, 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 con- version mechanism of internal and external friction to transform as-cast microstructure into fine grain deformation micro- structure 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 ob- tains industrial application; finally, the developing direction of new CASTEX technique is discussed.
出处
《中国材料进展》
CAS
CSCD
2013年第5期283-291,共9页
Materials China
基金
国家自然科学基金项目(51034002
50974038
50274020)
