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球墨铸铁生产中经常碰到黑渣缺陷。近年来由于型内处理方法的广泛采用,铁水经处理后直接进入铸型,不象包内处理有一个除渣过程,故格外容易形成黑渣缺陷。本文研究了不同的浇注系统在消除或减少黑渣方面的作用。铸件是压缩机双拐曲轴,重30公斤,湿型浇注,研究了六种浇注系统: 1)压力式浇注系统,内浇口处缩小20％面积:F直:F横:F内=1.4:1.2:1.0 2) 1:4:4无压力式浇注系统,内浇口设在横浇口顶部; 3)4:8:3浇注系统,内浇口在横浇口顶部; 4) 4:8:3浇注系统,内浇口在横浇口底部;
Ductile iron often encountered in the production of black slag defects. In recent years due to extensive use of the type of treatment, hot metal directly into the mold after treatment, unlike the package has a process of slag removal, it is particularly easy to form a black slag defects. This article studies the role of different gating systems in eliminating or reducing black slag. Casting is a compressor double crank shaft, weight 30 kg, wet pouring, studied six kinds of casting system: 1) pressure casting system, the gate to reduce the size of 20% Area: F Straight: F Horizontal: F = 1.4: 1.2: 1.0 2) 1: 4: 4 pressureless pouring system, with gate placed at the top of the gate; 3) 4: 8: 3 casting system with gate at the top of the gate; 4) 4: 8 : 3 pouring system, the gate at the bottom of the horizontal gate;