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回答: 古代中国和罗马帝国的钢铁生产 由 耄耄 于 2015-07-06 12:57 By the time of the Roman Republic, which flourished during the Iron Age, the classical world was well-acquainted with steel and the steel-making process. Pure iron is relatively soft, but pure iron is never found in nature. Natural iron ore contains various impurities in solid solution, which harden the reduced metal by producing irregular-shaped metallic crystals. The Gladius is generally made out of steel. In Roman times, ore was reduced in a bloomery furnace. The resulting pieces were called blooms,[13] which were further worked to remove slag inclusions from its porous surface. A recent metallurgical study of two Etrurian swords, one in the form of a Greek kopis from 7th century BC Vetulonia, the other in the form of a gladius Hispaniensis from 4th century BC Chiusa, gives some insight concerning the manufacture of Roman swords.[14] The Chiusa sword comes from Romanized Etruria; thus, regardless of the names of the forms (which the authors do not identify), the authors believe the process was continuous from the Etruscans to the Romans. The Vetulonian sword was crafted by the pattern welding process from five blooms reduced at a temperature of 1163 °C. Five strips of varying carbon content were created. A central core of the sword contained the highest: 0.15–0.25% carbon. On its edges were placed four strips of low-carbon steel, 0.05–0.07%, and the whole thing was welded together by forging on the pattern of hammer blows. A blow increased the temperature sufficiently to produce a friction weld at that spot. Forging continued until the steel was cold, producing some central annealing. The sword was 58 cm (22.8 in) long.[14] | |||
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