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Home > General > Circular of the Bureau of Standards Volume 73
Circular of the Bureau of Standards Volume 73

Circular of the Bureau of Standards Volume 73


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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 edition. Excerpt: ...The influence of oxygen on copper is chiefly interesting in conjunction with that of other impurities, notably bismuth, antimony, arsenic, and lead. It diminishes the embrittling effect of bismuth (Johnson) and lead; this is probably due to two facts: (1) That in the presence of oxygen an oxide of either of these metals is formed which melts at a higher temperature than the metal, and (2) that this oxide is distributed as fine globules instead of thin plates as is the metal. Greaves (252) has studied the effect of oxygen in copper containing arsenic and antimony, considering the cold-rolling and drawing properties, hardness, and microstructure. He cold-rolled strips from 0.35 to 0.02 inch hi thickness with intermediate annealing and drew the following conclusions: As the amount of arsenic increases up to 0.5 per cent the metal may take up more oxygen without suCering deterioration in its capacity for rolling. ITiis quantity of oxygen rises from about 0.05 to 0.2 per cent as the arsenic increases from o to o.2 per cent, then more slowly to about 0.28 per cent as the arsenic rises to 0.5 per cent. When less than 0.3 per cent of O: is present, a metal which will roll perfectly is obtained before the arsenic reaches 0.5 per cent. In a similar way antimony up to 0.4 per cent reduces the cold shortness of pure "dry" copper. His conclusions, relative to wire-drawing tests, are that the conditions obtaining are entirely similar to those for the rolling of copper. Baucke, Tables 9 and 15, has given some results on the toughness of cast and forged alloys with varying percentages of oxygen. Phosphorus.--The equilibrium diagram for alloys of copper and phosphorus has been partly established by Heyn and Bauer (224). Phosphorus in the form of...


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Product Details
  • ISBN-13: 9781234284442
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 32
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 1234284448
  • Publisher Date: 16 Jan 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 77 gr


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