论文部分内容阅读
我国可锻铸铁铸造车间采用机械化浇注还是近年来的事,但都不很完善。主要原因是由于可锻铸铁具有特殊的工艺性:铁水含炭量、含硅量很低(炭2.3～2.6％,高硅1.7～1.9％,中硅1.1～1.4％)故铁水流动性很差;同时铸件壁较薄,易产生浇不足缺陷。因此在用冲天炉生产可缎铸铁的车间里,不管其机械化程度多高,其浇注方法往往还是手工的。因为手端浇包轻便灵活,能由前炉直接出铁水,并以最快的速度把铁水从前炉运到铸工输送器上进行浇注,从而保证了可锻铸铁所必需的出铁温度1400°～1420℃C和浇注温度1370°～1390℃。一般铸造车间机械化浇注都是采用单轨中间包的,铁水温度损失很大,造成大量浇不足的废品,如果以提高冲天炉出炉温度来弥补温度损
China malleable iron casting workshop using mechanized pouring or in recent years, but not very perfect. The main reason is due to the special processability of malleable cast iron: the molten iron has low carbon content (2.3-2.6% for carbon, 1.7-1.9% for high silicon and 1.1-1.4% for middle silicon) Thin wall casting, easy to produce inadequate pouring defects. Therefore, the use of cupola satin can be produced in the workshop, regardless of their high degree of mechanization, the casting method is often manual. Because hand-ladle lightweight and flexible, can be directly out of the hot metal from the front furnace, and the fastest speed of the molten iron from the previous furnace to the castor conveyor for casting, thus ensuring the ductile iron required for the iron temperature 1400 ° ~ 1420 ℃ C and pouring temperature 1370 ° ~ 1390 ℃. General casting workshop mechanized pouring is the use of monorails tundish, a large loss of molten iron temperature, resulting in a large number of waste pouring inadequate, if the cupola oven to improve the temperature to make up temperature loss