连续定向凝固过程铜铬合金的组织与缺陷

Microstructure and Defect of Cu-Cr Alloy during Continuous Unidirectional Solidification

摘要: 研究了铜铬合金的连续走向凝固的工艺条件及相互之间的匹配关系,以及铜铬合金的显微组织及其表面缺陷形成的原因.结果表明:结晶器高度10~25mm,冷却距离25 mm,合金温度1210~1280℃,牵引速度0.2~1.0mm/s,冷却水量720L/h时,可制得Cu-0.6% Cr合金材料.

Abstract: The match relationship among technological conditions of Cu-Cr alloy, during continuous unidirectional solidification has been studied. Microstructure of Cu-Cr alloy and the reason for formation of surface defect in Cu-Cr alloy have been analyzed. The best technological conditions are:height of mold is 10-25 mm, cooling distance is 25 mm, melting temperature of Cu-Cr alloy is 1 280℃, Withdrawal speed is 0.24-1.00 mm/s, amount of cooling water is 720 L/h.