austempered ductile iron casting is the casting of cast iron in which carbon is precipitated from nodular graphite during solidification. Compared with gray cast iron, the most significant difference in metallographic structure is the change of graphite shape, which avoids the existence of sharp graphite in gray cast iron, so that the effect of graphite on the cutting of the metal matrix is greatly reduced, and the stress concentration caused by flake graphite is basically eliminated, so that the strength utilization ratio of the metal matrix can reach 70-90%, thus giving play to the performance of the metal matrix to a great extent.
Austempered ductile iron can be further improved by heat treatment and alloying like steel. Austempered ductile iron, for example, can be treated to achieve good toughness, with a elongation rate of up to 24%; The tensile strength can be up to 1400mpa, basically close to steel.
Austempered ductile iron has many advantages over steel. For example, casting performance is good, the cost is relatively low. Due to the increasing production of austempered ductile iron and the continuous development of its properties, it has now partially replaced forged and cast steel and become a promising metal structural material.
The pouring process in casting workshop.
After receiving iron liquid in front of the furnace, it is transported to the casting place by truck for pouring. Main technical parameters and external dimensions form of lifting bag, form of two-way rotary reducer, external dimensions of transmission ratio of double worm gear pair. Drum height, easy to spherification. Reasonable choice of rotary center, easy to operate, after pouring basic can be made by themselves double worm gear pair drive. Although the manufacturing requirements are high, but the transmission is flexible, bidirectional invertibility is good the derrick USES forgings, is more reliable than the steel plate welds the safety envelope steel plate is thicker, the package bottom structure USES the taper, the bottom hoop, the welding combination triple insurance, which prolongs the service life, and ensures the operator's safety. Main body and derrick, reduction gear box and handwheel, are equipped with a relatively chain plate can be locked at any time. The two trunnion shaft and the derrick are equipped with adjustable bearing, good consistency.
Austempered ductile iron can be further improved by heat treatment and alloying like steel. Austempered ductile iron, for example, can be treated to achieve good toughness, with a elongation rate of up to 24%; The tensile strength can be up to 1400mpa, basically close to steel.
Austempered ductile iron has many advantages over steel. For example, casting performance is good, the cost is relatively low. Due to the increasing production of austempered ductile iron and the continuous development of its properties, it has now partially replaced forged and cast steel and become a promising metal structural material.
The pouring process in casting workshop.
After receiving iron liquid in front of the furnace, it is transported to the casting place by truck for pouring. Main technical parameters and external dimensions form of lifting bag, form of two-way rotary reducer, external dimensions of transmission ratio of double worm gear pair. Drum height, easy to spherification. Reasonable choice of rotary center, easy to operate, after pouring basic can be made by themselves double worm gear pair drive. Although the manufacturing requirements are high, but the transmission is flexible, bidirectional invertibility is good the derrick USES forgings, is more reliable than the steel plate welds the safety envelope steel plate is thicker, the package bottom structure USES the taper, the bottom hoop, the welding combination triple insurance, which prolongs the service life, and ensures the operator's safety. Main body and derrick, reduction gear box and handwheel, are equipped with a relatively chain plate can be locked at any time. The two trunnion shaft and the derrick are equipped with adjustable bearing, good consistency.