06-10-2010 дата публикации
Номер: CN0101851722A
Принадлежит:
The invention provides a formula of a high silicon molybdenum ductile iron exhaust and a preparation method thereof, which relate to the field of the exhaust manifold of an automobile engine. In the preparation of the traditional high silicon molybdenum ductile iron exhaust at present, the main preparation process generally comprises the following steps of: weighing, putting into a furnace, melting, spheroidizing, slagging-off until molten iron is clean, spreading a covering agent, capping, keeping the temperature, pouring, molding, unpacking and shaking out. The method has difficult operation and poor stability of the preparation process, low yield, poor product quality and higher rejection rate. In order to overcome these defects, shot blasting treatment is carried out on returning iron by the invention, pig iron, steel scraps, the returning iron, ferromolybdenum and 75# ferrosilicon are sequentially added into an electric furnace for smelting and are spheroidized, the surface of a spheroidizing ...
Подробнее