ThyssenKrupp Magazin

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The Unna plant has only been operating for a short time. Under aerospace conditions, the material is smelted in the furnace. The vacuum process within the furnace ensures that the alloys are free of unwanted impurities. VIM FURNACE 89
90 VIM FURNACE chemical strains, and occasionally all three at the same time. The Unna smelter turns out no fewer than 260 alloys, and with research and development continuing this number looks certain to increase. Nickel and cobalt, two heavy metals, are the dominant basic elements. The Unna plant, which was opened by Vereinigte Deutsche Metallwerke in 1972, has changed along with the rest of the world over the past three decades. Its latest step into the future took place only weeks ago, when, for about €15 million, or a little more than $18 million, Unna obtained a vacuum induction melting furnace; this apparatus is known by the experts as a “VIM furnace,” short for vacuum induction melting. The simple word furnace does not, however, really do justice to this 30meter-long, 12-meter-high plant with an installed power load of 7,000 kVA. The metal construct is accessible via staircases and platforms, and the automatic melting and casting processes can be observed and controlled via monitors in the elevated helmstand. The actual furnace, the core of the plant, can be charged with solid or liquid material, and its 30-ton capacity is the biggest of any such facility in Europe. Indeed, with temperatures of up to 1,750 degrees Celsius, the material is melted under conditions that seem positively unearthly. Like a smooth soup, the pool crater has to be stirred, something that is done by an electro-magnetic mixer, while the vacuum allows for alloys that are free of oxygen, nitrogen and other unwanted impurities. After the casting, the molten mass is poured into transportable chill molds for cooling. The resulting metal blocks do not yet represent the final stage of purity, however. Some materials have to pass through the fire three times: this means that two remelting plants in Unna are used to further purify, homogenize and refine the material. The end products are highly pure super alloys that can be used in equipment such as turbine blades in steel drives, where a long lifecycle at high temperatures under extreme centrifugal force is required. ALLOYS WITH EXOTIC-SOUNDING NAMES For physicists, alloys are what thoroughbred horses are to breeders, and when reading the long list of creations you encounter such exotic names as Nicorros, Nimofer, Pernifer, Conicro, Cunifer and Magnifer. These are, of course, merely artificial names put together from the chemical signs of the involved metals – Ni standing for nickel, Cro for chrome, and Fer for iron. The alloy Nicrofer 5219 consists of no fewer than 11 elements, including iron and molybdenum, although nickel and chrome are the most important ones, with 52 percent and 19 percent, respectively. What has not changed in the Unna smelter over all these years is the so-called labeling of the material: before and after the fire. There TK <strong>Magazin</strong>e | 1 | 2004 |
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magazine TK Think. Think it over. T
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2 CONTENTS 12 Sparklers bring a lit
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4 BOBSLEIGH RACING Susi Erdmann is
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6 BOBSLEIGH RACING Taken to extreme
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8 BOBSLEIGH RACING
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10 BOBSLEIGH RACING The bobsleigh c
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12 SPARKLERS Iron powder for golden
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14 SPARKLERS
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16 SPARKLERS Sparklers with a bouqu
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18 SPARKLERS STICHWORT Perhaps the
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20 Y SLEEPERS
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22 Y SLEEPERS
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24 Y SLEEPERS
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26 STICHWORT Y SLEEPERS The home of
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28 Y SLEEPERS on this Y sleeper sys
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30 ASSEMBLED CAMSHAFTS To anyone wh
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32 OIL TOOLS
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34 OIL TOOLS A “power slip” has
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36 OIL TOOLS
Page 39 and 40: 38 CAB DESIGN
Page 41 and 42: 40 CAB DESIGN If the side walls are
Page 43 and 44: 42 MASTER BUILDER
Page 45 and 46: 44 MASTER BUILDER She looks very el
Page 47 and 48: 46 MASTER BUILDER
Page 49 and 50: 48 LiDONIT By Sebastian Groß | Pho
Page 51 and 52: 50 LiDONIT
Page 53 and 54: 52 LiDONIT the earth slowly and ove
Page 55 and 56: 54 NEWSTEELBODY
Page 57 and 58: 56 NEWSTEELBODY tional auto bodies.
Page 59 and 60: 58 INTERVIEW
Page 61 and 62: 60 INTERVIEW above all, who decides
Page 63 and 64: 62 EDWARD G. BUDD
Page 66 and 67: EDWARD G. BUDD 65 superior to a woo
Page 68 and 69: TK Magazine | 1 | 2004 | EDWARD G.
Page 70 and 71: TK Magazine | 1 | 2004 | GALLARDO 6
Page 72 and 73: TK Magazine | 1 | 2004 | The motto
Page 74 and 75: time that it is a car that is being
Page 76 and 77: the DEG stadium, and ThyssenKrupp S
Page 78 and 79: exotic applications that Eschbach d
Page 80 and 81: Metal materials - and the man who k
Page 82 and 83: MATERIALS SELECTION 81
Page 84 and 85: Jochen Adams is a pragmatic man who
Page 86 and 87: Laser welding requires special stee
Page 88 and 89: Laser imprint without tolerance sun
Page 92 and 93: must be no mix-up, so not one of th
Page 94 and 95: The corrosion resistance of stainle
Page 96 and 97: The lightweight among basic materia
Page 98 and 99: MAGNESIUM 97
Page 100 and 101: duce a car’s weight by about 100
Page 102 and 103: OBERRIED 101
Page 106 and 107: OBERRIED 105 Safe from all the elem
Page 110 and 111: sources of disturbance. Even if no
Page 112 and 113: TK Magazine | 1 | 2004 | Titanium i
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