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Mining and Metallurgy Volume 149

Mining and Metallurgy Volume 149


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ... scientists will no doubt ultimately arrive at the correct hypothesis for solving the problem of why one combination of electrode material and work material is productive of better results than can be obtained with another combination, the writer's conclusion is that, with the data at present available, the determinations must be made by actual experimenting--having in mind the qualities desired in the particular weld, such as ductility, tensile strength, elongation, and elastic limit. Inasmuch as it is possible, with the automatic machine, to main Fig. 7.--Tungsten High-speed Ring Automatically Welded By MetallioElectrode Arc Process To Cold-rolled Core To Form Milling-cutter Blank. tain arc uniformity with practically any kind of electrode material and to produce welds which, under low magnification, at least, appear 'to be perfect, and which respond favorably to ordinary tests such as bending, cutting and filing, it is reasonable to conclude that proper selection of electrode material will be productive of perfect welds on any kind of work material. To date, no steel has been tested on which apparently satisfactory welds could not be made. High-speed tungsten steel has been successfully welded to cold-rolled shafting, using Bessemer wire as electrode material, as is shown in Fig. 7. Ordinary steels varying in carbon content from perhaps 0.10 to 0.55 per cent. have been welded with entire success. Condition of Metal in Crater.--Because of the fact that the complete welding operation has been automatic and may be continued for a considerable length of time, say 5 min., an exceptional opportunity has been afforded for close concentration upon and study of the appearance of the arc. What seems to occur is that the molten metal in the crater is in a state of ...


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Product Details
  • ISBN-13: 9781130683561
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 128
  • Spine Width: 7 mm
  • Width: 189 mm
  • ISBN-10: 1130683567
  • Publisher Date: 01 Mar 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 240 gr


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