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Constructual Building Material
Beginning of essay
Steelmaking involves the removal of iron's impurities and the addition of desirable alloying elements. Steel was first made by cementation, a process of heating bars of iron with charcoal so that the surface of the iron acquired a high carbon content.
The bars were then fused together, yielding a m ....
Middle of essay
....dvanced technique of hardening iron weapons by heat treatment was known to the Greeks about 1000 BC.
The alloys produced by early iron workers, and, indeed, all the iron alloys made until about the 14th century AD, would be classified today as wrought iron. They were made by heating a mass of iron ore and charcoal in a forge or furnace having a forced draft. Under this treatment the ore was reduced to the sponge of metallic iron filled with a slag composed of metallic impurities and charcoal as.... |
| Number of words: 885 |
Approximate pages: 4 |
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