摘要
金属型铸造生产多级水泵铝青铜平衡环,与砂型铸造法相比,可节省有色金属材料5％,提高抗拉强度15％～20％。工艺特点为采用环形冒口凸台、上雨淋式浇注系统;金属型预热温度200～250℃;浇注温度1150℃。
Comparision of producing balance ring in aluminium bronze for multi-stage water pump by permanent mould casting with which is made by sand mould casting shows 5% nonferrous materials saving and 15~20% tensile strength improving. the techno- logy feafures collar feeder pad, top pencil gating system, preheating temperature of permanent mould 200~250℃ and pouring temperature 1150℃。
