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Laser Processing of Engineering Materials About the Author John Ion gained a First Class Honours degree in Metallurgy from Imperial College, London, in 1981, followed by a PhD in Engineering Materials from the University of Luleå, Sweden, where his interest in laser processing originated.
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2010114A tool for friction stir welding or forming is provided. The tool comprises a shoulder portion (40b) and optionally a pin portion (5Ob)l the shoulder portion (40b) comprised of at least 60% by weight and up to by weight of tungsten, molybdenum, tantalum, niobium or hafnium, the balance being alloying materials, if used.
The AD system only requires low vacuum levels; thus, a rotary vacuum pump coupled to a mechanical booster pump suffices to evacuate the chamber to a pressure of about 10 Pa-1 kPa during deposition. The apparatus is easy to scale up because of the simple principle on which it is based and the low vacuum conditions.
The expended tool can be of HSS, carbide or ceramic metal composites. The presence of elements such as Ni and Co in cemented carbide tools and various types of abrasives in ceramic tools makes its essential that abundant caution be exercised in their collection, storage and disposal.
This symposium is focused on Carbon and/or Nitrogen containing thin films and nano-materials. The objective is to provide an exchange platform for scientists, engineers and students dealing with the synthesis, characterization and application of these materials.
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The induction furnace is simply a fairly small melting furnace to which the various metals are added to make the desired alloy, usually quite specialized. When steel scrap is used as a charge, it will be a high-grade scrap the composition of which is well known (see also Sec. 7).
A vertical shaft-type smelting furnace in which an air blast is used, usually hot, for producing pig iron. The furnace is continuous in operation using iron ore, coke, and limestone as raw materials that are charged at the top while the molten iron and slag are collected at the bottom and are tapped out at intervals.