Abstracts 327--338 the change in mass of a sleeve coated with barium and strontium carbonates are to be studied. Any interesting results will be reported. (Author) G. F. Rouse, Proc. 4th National Conf. on Tube Techniques, 262, New York University Press, New York, 1959. 33 : 1 0 : 2 0 : 2 7 : 31 Summarized Proceedings of a Symposium on Current Developments in the Production of High Vacua. See Abstract No. 207.
~roperties of Getters in Electronic Tubes.
Anode Surface Effects in Diodes Cathodes. See Abstract No. 233.
3 3 : 4 7 : 16 See Abstract No. 219.
Containing
33:18 Oxide-Coated
33 : 56 : 18
Deuterium-Filled &hyratrons.
See Abstract No. 237.
Deuterium as a Filling for High-Voltage Abstract No. 238.
33 : 56 : 18 Thyratrons. See
Thermionic and Related Properties of Calcium Abstract No. 242.
33 : 18 Oxide. See
33 : 37 : 38 : 19 Summarized Proceedings of a Conference on Electron Microscopy. See Abstract No. 252. 33 : 19 : 32 Absolute Intensity Measurements of the Carbon and Aluminium X-Ray K-Lines with a Proportional Counter. See Abstract No. 253.
37.
37
329. Steel Vacuum Degassed in the Ladle. Note by Anon., Mat. Design Eng., 51, 12, Feb. 1960. 37 330. Missiles Boost Vacuum Melting. This note briefly discusses the impact of the missile programs on the vacuum melting field. The trend is to bigger furnaces and bigger ingots. Specific examples are given of large furnaces in operation or being planned together with some details of their capacities. A.G. Note by G. J. McManus, Iron Age, 185, 87, March 1960. 37 331. World's Largest Vacuum Induction Furnace. The furnace has a three-chamber design to permit semi-continuous casting. Every size of ingot between 200 and 5000 pounds can be poured and both molds and tundishes can be rotated when pouring. Several engineering innovations designed to make the installation versatile are described, a.G. J. W. Byrne, Metal Progress, 77, 83-86, April 1960. 37
33:18 Production of X-Ray during a Low Pressure Gas Discharge. See Abstract No. 248.
Technique for Preparing Thin Films of m-iron. No. 300.
355
33 : 30 See Abstract
Metallurgy, Inorganic Chemistry, Analytical Chemistry
37 327. Brazing in Vacuum by Induction Heating. Prolonged heating of unstabilized austenitic alloys during brazing may precipitate carbides at grain boundaries. Induction heating restricts the heat application to the joint to be brazed and shortens the brazing time. The use of this method for joining stainless steel caps and shells to make hermetically sealed canisters is described briefly. A.G. Note by Richard E. Paret, MetalProgress, 76, 127, Dec. 1959. 37 328. Vacuum Treatment of Molten Steel in Germany. Developed by Dortmund-H6rder Htitten-Union, this process is applicable to vacuum furnaces, openhearth and oxygen converter production. It operates on the basic principle of forcing successive portions of liquid steel into a vacuum vessel by atmospheric pressure. A variety of controlled alloy additions can be made late in the degassing cycle. This feature, combined with a major reduction of oxygen content, leads to improved cleanliness and increased product yield. (Author) P. J. Wooding and W. Sieckman, Metal Progress, 77, 116-122, Jan. 1960.
332. Levitation--New Tool for Metallurgy. Note by Anon., Metal Progress, 77, 127-128, April 1960, 37 333. Vacuum Furnace Brazes Parts at Temperatures to 4500°F. A new resistance-type furnace designed for sintering, brazing, heat treating, and annealing is described. It operates at temperatures up to 4500°F with pressures in the 0. I micron ra,ge. It has been used to determine interstitial elements (02, N2, H2) in refractory metals and their alloys, to vacuum anneal fusionwelded joints of refractory metals and their alloys and to sinter various exotic metals and their alloys. A.G. Mel Schwartz, Iron Age, 185, 68-70, June 1960. 37 334. New Furnace Permits Recovery of Reactive Metal Scrap. A new vacuum melting furnace, primarily intended for titanium scrap recovery, is described. It combines the features of skull melting by permanent electrode with vacuum melting by consumable electrode. A.G.
Iron Age, 185, 108-109, June 1960. 335. Vacuum Furnace for Creep-Rupture Testing. A creep and stress-rupture testing chamber is described which can operate up to 2700°F under a high vacuum. Principal design features are low power requirement, ease of test assembly, and adaptability to conventional creep and stress-rupture testing machines. (Author) T. F. Hengstenberg and E. F. Vandergrift, Metal Progress, 77, 94-97, June 1960. 336. Air Hardening Grade and Vacuum Degassed Offer New Possibilities. Note by Charles T. Evans, Jr., Metal Progress, 77, 105-106, May 1960. 37 337. Welding Processes. Various welding processes are discussed including: ultrasonic, high-frequency resistance, foil seam, magnetic-force, percussion, friction, thermo-pressure, diffusion-bond, electroslag and electron beam. a.G. John J. Chyle, Mech. Eng., 82, May 1960. 37
338. Vacuum Furnace. Engineer, 209, 5445, 944, June 1960.