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Cementation Process
The cementation process is an obsolete technology for making steel by carburization of iron. Unlike modern steelmaking, it increased the amount of carbon in the iron. It was apparently developed before the 17th century. Derwentcote Steel Furnace, built in 1720, is the earliest surviving example of a cementation furnace. Another example in the UK is the cementation furnace in Doncaster Street, Sheffield. Origins The process was described in a treatise published in Prague in 1574. It was again invented by Johann Nussbaum of Magdeburg, who began operations at Nuremberg (with partners) in 1601. The process was patented in England by William Ellyot and Mathias Meysey in 1614. At that date, the "invention" could consist merely of the introduction of a new industry or product, or even a mere monopoly. They evidently soon transferred the patent to Sir Basil Brooke, but he was forced to surrender it in 1619. A clause in the patent prohibiting the import of steel was found to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Four Cementation Anglais
4 (four) is a number, numeral (linguistics), numeral and numerical digit, digit. It is the natural number following 3 and preceding 5. It is the smallest semiprime and composite number, and is tetraphobia, considered unlucky in many East Asian cultures. In mathematics Four is the smallest composite number, its proper divisors being and . Four is the sum and product of two with itself: 2 + 2 = 4 = 2 x 2, the only number b such that a + a = b = a x a, which also makes four the smallest squared prime number p^. In Knuth's up-arrow notation, , and so forth, for any number of up arrows. By consequence, four is the only square one more than a prime number, specifically 3, three. The sum of the first four prime numbers 2, two + 3, three + 5, five + 7, seven is the only sum of four consecutive prime numbers that yields an Parity (mathematics), odd prime number, 17 (number), seventeen, which is the fourth super-prime. Four lies between the first proper pair of twin primes, 3, three and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madeley, Shropshire
Madeley is a constituent town and civil parish in Telford and Wrekin in Shropshire, England. The parish had a population of 17,935 at the 2001 census. Madeley is recorded in the Domesday Book, having been founded before the 8th century. Historically, Madeley's industrial activity has largely been in mining, and later, manufacturing, which is still a large employer in the town, along with service industries. Parts of the parish fall within the UNESCO World Heritage Site of Ironbridge Gorge, the site of The Iron Bridge, and a key area in the development of Industry. History The settlement of Madeley is recorded as far back as the Domesday Book. The town was founded prior to the 8th century, and subsequently became a market town in the 13th century. Sigward, a local ruler in the time of King Æthelbald of Mercia, is said to have held 3 hides of land at Madeley. Between 727 and 736 he sold his holdings to Mildburh, daughter of Merewalh, sub-king of the Magonsæte. She was the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dannemora, Sweden
Dannemora is an old mining town and a locality situated in Östhammar Municipality, Uppsala County, Sweden. It had 213 inhabitants in 2010. Dannemora mine Dannemora is the location of an important iron ore mine, the Dannemora mine, which formed the basis of the iron industry in Uppland. It provided the raw material for about 20 finery forges that produced bar iron for export. In the early mid-19th century, numerous workers from this town emigrated to the United States, with some settling in upstate New York at the site of other iron mines. They named the community Dannemora, after their former home. In England, iron produced from Dannemora ore was known as ''oregrounds iron'', after the port town of Öregrund, from which it was shipped. Bar iron from these forges was considered the best raw material for producing blister steel by the cementation process, owing mainly to the extremely low levels of sulphur and phosphorus in the ores, and their relatively high manganese content. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Öregrund
Öregrund is a locality situated in Östhammar Municipality, Uppsala County, Sweden. As of 2010, it had 1,555 inhabitants. It is located by the Baltic Sea, on the coast of Uppland. Despite its small population, Öregrund is still commonly referred to as a ''city'' for historical reasons. History The town was granted a royal charter in 1491, by request from citizens from nearby city of Östhammar. Östhammar had once been a coastal town, but due to post-glacial rebound its harbour had become useless. The royal council granted the request to construct a city at the end of the archipelago where the sea opened. It further proclaimed "the city shall forever be known as Öregrund". The small but expanding city soon became a point of conflict. In 1520 Christian II of Denmark conquered Stockholm. A young Gustav Eriksson tried to gather an army, and Öregrund became the port whereto ships with men and weapons were transported. As a countermeasure, the Danish King had the city burnt i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oregrounds Iron
Oregrounds iron was a grade of iron that was regarded as the best grade available in 18th century England. The term was derived from the small Swedish city of Öregrund, the port from which the bar iron was shipped. It was produced using the Walloon process. Oregrounds iron is the equivalent of the Swedish ''vallonjärn'', which literally translates as Walloon iron. The Swedish name derives from the iron being produced by the Walloon version of the finery forge process, the Walloon process as opposed to the German method, which was more common in Sweden. Actually, the term is more specialised, as all the Swedish Walloon forges made iron from ore ultimately derived from the Dannemora mine. It was made in about 20 forges mainly in Uppland. Many of the ironworks were founded by Louis de Geer and other Dutch entrepreneurs who set up ironworks in Sweden in the 1610s and 1620s, with blast furnaces and finery forges. Most of the early forgemen were also from Wallonia. Origins i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Finery Forge
A finery forge is a forge used to produce wrought iron from pig iron by decarburization in a process called "fining" which involved liquifying cast iron in a fining hearth and removing carbon from the molten cast iron through oxidation. Finery forges were used as early as the 3rd century BC in China. The finery forge process was replaced by the puddling process and the roller mill, both developed by Henry Cort in 1783–4, but not becoming widespread until after 1800. History A finery forge was used to refine wrought iron at least by the 3rd century BC in ancient China, based on the earliest archaeological specimens of cast and pig iron fined into wrought iron and steel found at the early Han Dynasty (202 BC – 220 AD) site at Tieshengguo.Pigott, Vincent C. (1999). ''The Archaeometallurgy of the Asian Old World''. Philadelphia: University of Pennsylvania Museum of Archaeology and Anthropology. , p. 186-187. Pigott speculates that the finery forge existed in the previous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walloon Process
A Walloon forge (or Walloon process) is a type of finery forge that decarbonizes pig iron into wrought iron. The process was conceived in the Liège region, and from there extended to France, then England around the end of the 15th century. Louis de Geer brought it to Roslagen in Sweden at the beginning of the 17th century, with Walloon blacksmiths. The Walloon process spread to Sweden in the Uppland province north of Stockholm, where it was used to produce a specific kind of wrought iron called oregrounds iron. In Sweden The source material was pig iron produced by a blast furnace using charcoal and the manganese rich iron ore from the Dannemora mine. A "V" shaped hearth using charcoal was used to heat up the pig iron bar that was presented to a tuyere that decarbonized it and made it melt and fall in drops that solidified in a pool of slag where the decarburization continued. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweden
Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, Finland to the east, and is connected to Denmark in the southwest by a bridgetunnel across the Öresund. At , Sweden is the largest Nordic country, the third-largest country in the European Union, and the fifth-largest country in Europe. The capital and largest city is Stockholm. Sweden has a total population of 10.5 million, and a low population density of , with around 87% of Swedes residing in urban areas in the central and southern half of the country. Sweden has a nature dominated by forests and a large amount of lakes, including some of the largest in Europe. Many long rivers run from the Scandes range through the landscape, primarily ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis De Geer (1587-1652)
Louis De Geer may refer to: People: *Louis De Geer (1587–1652), industrial entrepreneur of Walloon origin * Louis De Geer (1622–1695), industrial entrepreneur *Louis Gerhard De Geer (1818–1896), baron, Prime Minister of Sweden 1876–80 *Gerhard Louis De Geer Baron Gerhard Louis De Geer of Finspång (usually known as Louis De Geer; 27 November 185425 February 1935) was a Swedish politician, who served in the first chamber of the ''Riksdag'' 1901–14, was governor of Kristianstad County 1905–23, an ... (1854–1935), baron, Prime Minister of Sweden 1920–21 Other: * Louis de Geer konsert & kongress, in Norrköping, Sweden {{disambig De Geer, Louis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lövstabruk
Lövstabruk is a village on a common in the parish of Österlövsta, Tierp Municipality, Uppsala County, Sweden. In 2010 it had a population of 96, compared to some 1300 at its height during the 18th century. The word ''lövsta'' is derived from ''lösta'', an old Swedish word for "glade". The contemporary spelling in the 18th century was ''Leufsta'', with French orthography reflecting the Walloon origin of the workforce. The latter part of the name, ''bruk'', means both "mill town" and "ironworks". Ironworks The settlement was founded as an ironworks by local farmers during the 16th century, from then on relying primarily upon the quality Dannemora ore. The ownership changed hands to the crown and back again. Another forgery was later built by the crown, which from time to time was leased to various tenants, most notably Wellam de Besche, governmental inspector over most ironworks in Sweden, in 1626 and to him and his partner Louis De Geer in the succeeding year. They i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Österbybruk
Österbybruk is a locality situated in Östhammar Municipality, Uppsala County, Sweden with 2,272 inhabitants in 2010. Ironworks The Österby works was one of a number mostly in Roslagen, where there were Walloon forges, producing high quality oregrounds iron for export. Österby's brand mark was OO. All iron was branded with that mark. The Österby ironproducts were highly valued in England for the production of blister steel by the cementation process. The historical complex of Österbybruk is a "Vallonbruk", a social and economic building complex surrounding a forge. Österbybruk is one of the most beautiful examples of the remains of the presence and input of Walloon immigrants ('valloner') in Sweden in the 17th century. More than 1.200 families emigrated in that era to Sweden, where the expertise of Walloon master blacksmiths was highly sought after. They helped to launch the Swedish iron and metal industry. The number of their descendants is estimated today between 500.000 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forest Of Dean
The Forest of Dean is a geographical, historical and cultural region in the western part of the county of Gloucestershire, England. It forms a roughly triangular plateau bounded by the River Wye to the west and northwest, Herefordshire to the north, the River Severn to the south, and the City of Gloucester to the east. The area is characterised by more than of mixed woodland, one of the surviving ancient woodlands in England. A large area was reserved for royal hunting before 1066, and remained as the second largest crown forest in England, after the New Forest. Although the name is used loosely to refer to the part of Gloucestershire between the Severn and Wye, the Forest of Dean proper has covered a much smaller area since the Middle Ages. In 1327, it was defined to cover only the royal demesne and parts of parishes within the hundred of St Briavels, and after 1668 comprised the royal demesne only. The Forest proper is within the civil parishes of West Dean, Lydbrook, Cin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
