Date:2012-05-02 16:34
introduced the classification of steel before briefly explain the basic concepts of ferrous metals, steel and nonferrous metals. 1, black metal is an alloy of iron and iron. Such as steel, pig iron, ferro alloys, cast iron. Steel and pig iron are iron, carbon add an element of the alloy, collectively known as the iron-carbon alloy. Pig iron is the iron ore into the blast furnace smelting products, mainly used for steel making and manufacture of castings. Casting iron cupola in the melting the c