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Cast iron coins of Song dynasty China: a metallurgical study

机译:中国宋代铸铁硬币的冶金研究

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A selection of 37 Song dynasty Chinese cast iron coins was subjected to metallurgical analysis. From inscriptions, these are dated between 1078 and 1215 AD, and the mint locations of 23 of the coins are known. All were found to be white cast irons, but they separated into two types, one with relatively high levels of silicon, phosphorus and sulphur and divorced eutectic microstructures, and the other with low levels of these three elements and ledeburitic microstructures. Those coins that were minted in Shaanxi were all found to be of the first type, while those minted in the Hubei/Anhui region to the southeast are all of the second type. On the basis of sulphur content it is believed to be likely that iron used for the first group was smelted in coal- or coke-fired blast furnaces, while the iron in the second group was smelted using charcoal. This is in general agreement with what is known of the iron industry in China during the Song period.
机译:选取了37个宋代中国铸铁硬币进行了冶金分析。根据铭文,这些硬币的日期可追溯至公元1078年至1215年,并且已知23枚硬币的铸造位置。发现全部都是白口铸铁,但它们分为两种类型,一种具有较高含量的硅,磷和硫,并且具有离婚的共晶微观结构,另一种具有较低含量的这三种元素和疏松组织。在陕西铸造的那些硬币都是第一类,而在东南部的湖北/安徽地区铸造的那些硬币都是第二类。基于硫含量,据信第一组中使用的铁可能是在燃煤或焦炭的高炉中冶炼的,而第二组中的铁是使用木炭冶炼的。这与宋代时期中国的钢铁工业大体一致。

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