Steely breed analysis presses the quantity that contain carbon different divisional

Cent of iron carbon alloy is steel and cast iron two kinds big, steel is to contain carbolic quantity to be 0.03% ～ the iron carbon alloy of 2% . Carbolic steel is the most commonly used general steel, exercise convenience, treatment simple, price is low, and can satisfactory use requirement issues in most circumstance, use so very general. Press the quantity that contain carbon different, carbolic steel is divided again for mild steel, medium carbon steel and high-carbon steel. Lift along with the quantity that contain carbon, the hardness of carbolic steel is added, endurance is reduced. Alloy steel steel of renown special type, one kind attends on the foundation of carbolic steel or a variety of alloying element, make the arrangement structure of steel and function produce change, have a few special functions next, be like tall hardness, tall wearability, tall endurance, corrosion resistance, etc. The alloying element in often attending steel has Si, W, Mn, Cr, Ni, Mo, V, Ti to wait. The capital of alloy steel is proper and rich and generous, divide inadequacy of Cr, Co, mn class is inferior outside, w, Mo, V, Ti and rare-earth metal reserves are very high. At the beginning of 21 centuries, the portion in the total output of steel will have alloy steel to grow substantially.
The quantity that contain carbon the iron carbon alloy of 4.3% calls 2% ～ cast iron. Cast iron is hard and fragile, but compression wear-resisting. The figure that exists according to the carbon in cast iron is different can divide again for white iron, grey iron and nodular cast iron. The carbon in white iron distributes with Fe3C appearance, fracture surface shows silvery white, qualitative hard and fragile, cannot undertake machining, it is the material of steel-making, friend calls steel-making cast iron again. Carbon weighs grey iron with what flake graphite appearance distributes, fracture surface shows silver grey scene, easy cutting, yi Zhu, wear-resisting. If carbon distributes with bulbiform black lead,weigh nodular cast iron, its machinery function, treatment function is close to Yu Gang. In cast-iron in attend special type alloying element to be able to get particular kind cast-iron, if attend Cr, wearability can rise substantially, there is very important use below special type condition.

The antecedents of the carbon in iron and steel: One of material of puddling are iron ore, iron ore is main component is Fe2O3, without carbon.

Of the material of puddling is anxious carbon

A little anxious carbon takes puddling course in molten iron, carbon is contained in causing molten iron. Produce steelily by cast iron of iron ore refine.

Make material steel-making by cast iron, the process of steel-making basically is the process of de-carbon. Still cannot divide carbon, steel demand has the carbon of certain amount, the function just arrives best.

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