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Robert Forester Mushet
Robert Forester Mushet (8 April 1811 – 29 January 1891) was a British metallurgist and businessman, born on 8 April 1811, in Coleford, in the Forest of Dean, Gloucestershire, England. He was the youngest son of Scottish parents, Agnes Wilson and David Mushet; an ironmaster, formerly of the Clyde, Alfreton and Whitecliff Ironworks. In 1818/9 David Mushet built a foundry named Darkhill Ironworks in the Forest of Dean. Robert spent his formative years studying metallurgy with his father and took over the management of Darkhill in 1845. Anstis p. 85. In 1848 he moved to the newly constructed Forest Steel Works on the edge of the Darkhill site where he carried out over ten thousand experiments in ten years Anstis p. 157 before moving to the Titanic Steelworks in 1862. It seems that Mushet only began using his middle name 'Forester' in 1845, and only occasionally at first. In his later years he said he had been given the name from the Forest of Dean, although he variously spelled ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coleford, Gloucestershire
Coleford is a market town in the west of the Forest of Dean, Gloucestershire, England, east of the Welsh border and close to the Wye Valley. It is the administrative centre of the Forest of Dean (district), Forest of Dean district. The combined population of the town's two Wards and electoral divisions of the United Kingdom, electoral wards at the United Kingdom Census 2011, 2011 census was 8,359. The population of the town's parish was 9,273 in the 2021 Census. The parish includes the village of Baker's Hill. History Coleford was originally a tithing in the north-east corner of Newland, Gloucestershire, Newland parish. The settlement arose at a Ford (crossing), ford through which charcoal and iron ore were probably carried. By the mid-14th century, hamlets called Coleford and Whitecliff had grown up in the valley of Thurstan's Brook. Coleford had eight or more houses in 1349 and was described as a street in 1364. It had a place of worship by 1489. In 1642 the commander of a Ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Businesspeople In Steel
A businessperson, businessman, or businesswoman is an individual who has founded, owns, or holds shares in (including as an angel investor) a private-sector company. A businessperson undertakes activities (commercial or industrial) for the purpose of generating cash flow, sales, and revenue by using a combination of human, financial, intellectual, and physical capital with a view to fueling economic development and growth. History Prehistoric period: Traders Since a "businessman" can mean anyone in industry or commerce, businesspeople have existed as long as industry and commerce have existed. "Commerce" can simply mean "trade", and trade has existed through all of recorded history. The first businesspeople in human history were traders or merchants. Medieval period: Rise of the merchant class Merchants emerged as a "class" in medieval Italy (compare, for example, the Vaishya, the traditional merchant caste in Indian society). Between 1300 and 1500, modern accounting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1891 Deaths
Events January–March * January 1 ** Paying of old age pensions begins in Germany. ** A strike of 500 Hungarian steel workers occurs; 3,000 men are out of work as a consequence. **Germany takes formal possession of its new African territories. * January 2 – A. L. Drummond of New York is appointed Chief of the Treasury Secret Service. * January 4 – The Earl of Zetland issues a declaration regarding the famine in the western counties of Ireland. * January 5 **The Australian shearers' strike, that leads indirectly to the foundation of the Australian Labor Party, begins. **A fight between the United States and Indians breaks out near Pine Ridge agency. **Henry B. Brown, of Michigan, is sworn in as an Associate Justice of the Supreme Court. **A fight between railway strikers and police breaks out at Motherwell, Scotland. * January 6 – Encounters continue, between strikers and the authorities at Glasgow. * January 7 ** General Miles' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1811 Births
Events January–March * January 8 – An unsuccessful slave revolt is led by Charles Deslondes, in St. Charles and St. James Parishes, Louisiana. * January 17 – Mexican War of Independence – Battle of Calderón Bridge: A heavily outnumbered Spanish force of 6,000 troops defeats nearly 100,000 Mexican revolutionaries. * January 22 – The Casas Revolt begins in San Antonio, Spanish Texas. * February 5 – British Regency: George, Prince of Wales becomes prince regent, because of the perceived insanity of his father, King George III of the United Kingdom. * February 19 – Peninsular War – Battle of the Gebora: An outnumbered French force under Édouard Mortier routs and nearly destroys the Spanish, near Badajoz, Spain. * March 1 – Citadel Massacre in Cairo: Egyptian ruler Muhammad Ali kills the last Mamluk leaders. * March 5 – Peninsular War – Battle of Barrosa: A French attack fails, on a larger Anglo-Portugue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spathic Iron Ore
Siderite is a mineral composed of iron(II) carbonate (FeCO3). It takes its name from the Greek word σίδηρος ''sideros,'' "iron". It is a valuable iron mineral, since it is 48% iron and contains no sulfur or phosphorus. Zinc, magnesium and manganese commonly substitute for the iron resulting in the siderite-smithsonite, siderite-magnesite and siderite- rhodochrosite solid solution series. Siderite has Mohs hardness of 3.75-4.25, a specific gravity of 3.96, a white streak and a vitreous lustre or pearly luster. Siderite is antiferromagnetic below its Néel temperature of 37 K which can assist in its identification. It crystallizes in the trigonal crystal system, and are rhombohedral in shape, typically with curved and striated faces. It also occurs in masses. Color ranges from yellow to dark brown or black, the latter being due to the presence of manganese. Siderite is commonly found in hydrothermal veins, and is associated with barite, fluorite, galena, and others. It i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crucible Steel
Crucible steel is steel made by melting pig iron (cast iron), iron, and sometimes steel, often along with sand, glass, ashes, and other fluxes, in a crucible. In ancient times steel and iron were impossible to melt using charcoal or coal fires, which could not produce temperatures high enough. However, pig iron, having a higher carbon content and thus a lower melting point, could be melted, and by soaking wrought iron or steel in the liquid pig-iron for a long time, the carbon content of the pig iron could be reduced as it slowly diffused into the iron, turning both into steel. Crucible steel of this type was produced in South and Central Asia during the medieval era. This generally produced a very hard steel, but also a composite steel that was inhomogeneous, consisting of a very high-carbon steel (formerly the pig-iron) and a lower-carbon steel (formerly the wrought iron). This often resulted in an intricate pattern when the steel was forged, filed or polished, with possibly t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Speed Steel
High-speed steel (HSS or HS) is a subset of tool steels, commonly used as cutting tool material. It is often used in power-saw blades and drill bits. It is superior to the older high-carbon steel tools used extensively through the 1940s in that it can withstand higher temperatures without losing its temper (hardness). This property allows HSS to cut faster than high carbon steel, hence the name ''high-speed steel''. At room temperature, in their generally recommended heat treatment, HSS grades generally display high hardness (above Rockwell hardness 60) and abrasion resistance (generally linked to tungsten and vanadium content often used in HSS) compared with common carbon and tool steels. History In 1868 English metallurgist Robert Forester Mushet developed Mushet steel, considered the forerunner of modern high-speed steels. It consisted of 2% carbon, 2.5% manganese, and 7% tungsten. The major advantage of this steel was that it hardened when air cooled from a temperature ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machine Tools
A machine tool is a machine for handling or machining metal or other rigid materials, usually by cutting, boring, grinding, shearing, or other forms of deformations. Machine tools employ some sort of tool that does the cutting or shaping. All machine tools have some means of constraining the work piece and provide a guided movement of the parts of the machine. Thus, the relative movement between the workpiece and the cutting tool (which is called the toolpath) is controlled or constrained by the machine to at least some extent, rather than being entirely "offhand" or " freehand". It is a power-driven metal cutting machine which assists in managing the needed relative motion between cutting tool and the job that changes the size and shape of the job material. The precise definition of the term ''machine tool'' varies among users, as discussed below. While all machine tools are "machines that help people to make things", not all factory machines are machine tools. Today mach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air-hardening Steel
Tool steel is any of various carbon steels and alloy steels that are particularly well-suited to be made into tools and tooling, including cutting tools, dies, hand tools, knives, and others. Their suitability comes from their distinctive hardness, resistance to abrasion and deformation, and their ability to hold a cutting edge at elevated temperatures. As a result, tool steels are suited for use in the shaping of other materials, as for example in cutting, machining, stamping, or forging. With a carbon content between 0.5% and 1.5%, tool steels are manufactured under carefully controlled conditions to produce the required quality. The presence of carbides in their matrix plays the dominant role in the qualities of tool steel. The four major alloying elements that form carbides in tool steel are: tungsten, chromium, vanadium and molybdenum. The rate of dissolution of the different carbides into the austenite form of the iron determines the high-temperature performance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tool Steel
Tool steel is any of various carbon steels and alloy steels that are particularly well-suited to be made into tools and tooling, including cutting tools, dies, hand tools, knives, and others. Their suitability comes from their distinctive hardness, resistance to abrasion and deformation, and their ability to hold a cutting edge at elevated temperatures. As a result, tool steels are suited for use in the shaping of other materials, as for example in cutting, machining, stamping, or forging. With a carbon content between 0.5% and 1.5%, tool steels are manufactured under carefully controlled conditions to produce the required quality. The presence of carbides in their matrix plays the dominant role in the qualities of tool steel. The four major alloying elements that form carbides in tool steel are: tungsten, chromium, vanadium and molybdenum. The rate of dissolution of the different carbides into the austenite form of the iron determines the high-temperature performance of st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mushet Steel
Mushet steel, also known as Robert Mushet's Special Steel and, at the time of its use, self-hardening steel and air-hardening steel,. is considered to be both the first tool steel and the first air-hardening steel.. It was invented in 1868 by Robert Forester Mushet. Prior to Mushet steel, steel had to be quenched to harden it. It later led to the discovery of high-speed steel. Properties The chemical composition of Mushet steel varied; tungsten was the main alloying constituent, which ranged between 4 and 12%, while manganese (2–4%) and carbon (1.5–2.5%) were the secondary alloying constituents. Typical samples contain 9% tungsten, 2.5% manganese, and 1.85% carbon. Mushet steel was harder than standard water quenched steel. It was found that Mushet steel could be best hardened by submitting it to an air blast after forging. Mushet steel is non-magnetic. Use Mushet steel was primarily used in machine tools due to its ability to retain its hardness at high temperatures. In 1894 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
