论文部分内容阅读
电磁成型铸造是七十年代发展起来的铝合金半连续铸造生产新工艺,由于铸锭液穴中熔体在电磁力作用下有规律地运动,并且铸锭的直接水冷位置(假想结晶器高度)比普通结晶器短,铸锭结晶速度快,因此铸锭的枝晶间距小,晶粒极细,铸锭中第二相薄而均匀.磁力成型铸造是“无接触铸造”,克服了传统结晶器铸造铸锭的各种表面缺陷.由于上述特点,铸锭质量显著提高了.本文介绍电磁成型连续铸造铝合金铸锭工艺在提高铸造表面光洁度、细化晶粒及显微组织,减少化学成份偏析从而提高铸锭机械加工性能和提高质量等方面的情况.
Electromagnetic forming casting is a new technology developed in the seventies of semi-continuous casting of aluminum alloy. Due to the regular movement of the melt in the ingot liquid cavity under the action of electromagnetic force, and the direct water cooling position of the ingot (hypothetical mold height) Compared with ordinary mold, ingot crystallization rate is fast, so the ingot dendrite spacing is small, very fine grains, ingot thin and uniform in the second phase.Magnetic casting is “non-contact casting,” to overcome the traditional crystallization Casting various surface defects of ingot.Because of the above characteristics, ingot quality is significantly improved.In this paper, the electromagnetic casting continuous casting aluminum alloy ingot casting process in improving the surface finish, grain and grain refinement, reducing the chemical composition Segregation to improve ingot machinability and improve quality and so on.