In China, FAW Wuxi Diesel Engine Factory and Dongfeng Motor Company have mass produced vermicular cast iron automotive engines and transmission components. Austenite bainitic ductile iron is a product derived from white cast iron for heat treatment, and ductile cast iron is a derivative product for isothermal heat treatment of ductile iron. It can obtain high strength and certain toughness that other cast iron varieties can't reach, and has aroused extensive attention in academic circles in recent years. There have been many researches and explorations on it, but the application of industrialization is still in its infancy. Due to its good prospects, this article can be categorized as the sixth cast iron species that humans have mastered. Cast iron has so many varieties of different properties that it can meet many specific service requirements, and some even expensive other materials are incomparable. The low-energy advantage of cast iron is now compared with iron-smelting and aluminum-smelting from the perspective of energy consumption. Iron ore is mainly smelted using coke pyrometallurgy. The energy consumption per kilogram of iron is about 45. The main reason for aluminum-making is electrolysis, which is delayed by 1 It was only invented in the United States. The energy consumption per kilogram of aluminum is about $1245, which is a comparison of iron and steel energy consumption from the perspective of energy consumption.
The cast iron expert forum "modern cast iron" and steel belong to the same ferrous metal, with iron as the main material. The cast iron is only successful in one-step reduction process in the blast furnace, and it consumes less energy; but in order to obtain steel, it needs to add two steps, first in the steelmaking furnace through the oxidation process, to reduce the amount of carbon and silicon in iron and other impurities, and then Ingots or continuous casting billets are rolled into steel and consume more energy. The price advantage of cast iron The main raw material for cast iron parts is pig iron ingots. No metal material is cheaper than pig iron ingots. Forgings are made of high-quality steel rods. The price of steel rods is about 1 times that of cast iron ingots. The main raw material for aluminum castings is aluminum ingots, and the current domestic market price is about 1 times that of pig iron ingots. The advantages of pig iron and magnesium, copper and titanium are even greater. When comparing raw material prices, there is another important factor, that is, the recovery of process wastes.
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