- Email: [email protected]
1544. Magnesite-chromite stopper sleeves for vacuum treatment of steel
Classified
abstracts
1527-1547
metallic inclusions in vacuum-deoxidized I-ton ingots of 0.20 per cent carbon steel. G H Ockenhouse and J E Werner, J Metals, 28 (I), 1966, 52-58. 37 1527. Beryllium fusion under vacuum. (Belgium) The fusion of beryllium by electron bombardment at 4 x IO-’ torr in a cooled metal crucible gave a beryllium with 350 ppm of hydrogen and 30 ppm of carbon. Fusion by high frequency in a Be0 crucible at lo-* torr gave 1200 ppm of hydrogen and 130 ppm of carbon. Mass spectrometry indicated a reaction of water in the residual gases with the Be above 600” to produce an important hydrogen partial pressure over the Be. B Schaub, Metallurgic, 5 (6), 1965, 215-229, (in French). 37 1528. Production of Ni-M&Fe wire for vacuum applications. (Hungary) V Eigner, Kohasz Lapok, 98 (II), 1965, 495-497, (in Hungarian). 37 1529. Vacuum purification of metals.
(Belgium)
The advantages of vacuum purification of metals, the thermodynamic principles of the elimination of oxygen, nitrogen, hydrogen, and sulphur by evaporation and decomposition and other chemical reactions influenced by vacuum, are reviewed. M Salesse, Metallurgic, 5 (6), 1965, 203-214, (in French). 37 1530. Vacuum siliciding of molybdenum with a controlled silicon supply rate. (USSR) V E Ivanov, et al, Zharostoikie Pokrytiya, Znst Khim, Silikatov, Tr Seminara,
Leningrad,
1965,
83-86,
37 (USA)
A review is presented with emphasis on practice and plant performance. G D Kelsey, Trans Znst Chem Eng, 43, 1965, T248-T255. 37 1532. Vacuum treating molten ferrochromium. (USSR) A method was developed for producing ferrochromium with less than 0.02 per cent carbon. By vacuum treating 400 kg of molten ferrochromium for 1 hr at a residual pressure in the furnace of 0.6-2.0 torr from 1670-17OO”C, the carbon content in the alloy can be reduced from 0.05-0.07 to 0.01-0.02 per cent. S V Bezobrazov, et al, Stal, 9, 1965, 820-823, (in Russian). 37 1533.
340-343. 37 1538. The use and development of vacuum degassing methods. (Czechoslovakia)
An account is given of degassing technology, the equipment used and the results obtained. Anon, Hutnicka Conf VSB v Ostrave, Sbornik Referata Ocelarske Sekec,
1965, (in Czech). 37
Regularities in elimination of non-metallic inclusions during vacuum arc melting. (USSR) Vacuum arc refining of ShKhl5 alloy steel used for ball bearings by remelting the electrodes of steel that are deoxidized with Mn, Si, and Al. L N Belyanchikov, Izv VU2 Chernaya Met, 7, 1965, 74-77, (in 1539.
Russian). 37 1540. Vacuum degassing of steel in the ladle at the Derrain works of la Societt? Fifes Lille-Cail. (France)
A detailed description is given of the installation and its operation. The process is intended mainly for manufacturing forgings and ingots for rolling with low hydrogen contents. J C Paurise, Centre Dot Sid&, 22 (12), 1965, 2655, (in French). 1541. Degassing of liquid steel - new industrial processes.
(in Russian).
1531. Practical aspects of continuous rotary vacuum filters.
in
liquid iron during vacuum fusion analysis. (Great Britain) N J3irks and D Booth, J Iron and Steel Inst, 204 (4), April 1966,
Vacuum metallurgical urocess for the manufacture of steel.
37 (France)
The induction stirring degassing processes of Republic Steel, the Thermaflow process of Armco and the Therm-i-Vat processes of Latrobe Steel are described. J Verge, Techn Mod, 57, 1965, 529-536, (In French). 37 1542. Novel steel refining process.
(Sweden)
The ASEA-SKF process, developed at the Hellefors Steelworks in Sweden, is described. Metal that has been melted or partly refined in another furnace is degassed during induction stirring, refined and finished in a ladle furnace from which teeming later takes place. M Tiberg, et al, Min Mag, 114, 1966, 22-27. 37 1543. Vacuum degassing in the ladle. First operating results at the Thionville Steel Works of La Soci& Lorraine-Escaut. (France)
A process of vacuum degassing in the ladle is described and the results of its first operating year reported, analysed and discussed. A Le Moyne, et al, Centre Doe Sidir, 11, 1965, 2473-2499, (in French). 37 1544.
Magnesite-chromite stopper sleeves for vacuum treatment of
steel. (USSR) The applicability of magnesite-chromite stopper sleeves under conditions of vacuum treatment of transformer, ball-bearing and stainless steel as well as in ladles for continuous casting, was investigated. It was found that during vacuum treatment of a quality structural steel at a residual pressure of 1.5-6 torr and with aggressive slags, magnesite-chromite sleeves wear faster than high aluminium tubes. A I Uzberg and N F Bugaev, Ogneupory, 12, 1965, l-7, (in Russian). 37 1545. Deoxidation of ball bearing steel with ferro-aluminium during vacuum treatment. (USSR)
It was established that the deoxidation practice in which ball bearing steel is deoxidized in a vacuum with Fe-Al after the addition of Fe-Si produces a cleaner steel. 0 Kh Fatkullin, et al, Metallurg, 12, 1965, 20-22, (in Russian). 37 1546. Effects of vacuum on the tensile properties of magnesium single crystals. (USA)
The tensile behaviour of Mg single crystals at a temperature of 26&2”C was investigated atIvarying pressure levels from 760 to 8 x lo’+ torr. D P Williams and H G Nelson, NASA Ames Research Center, CahA 1965,
25 pages. 37
Flexural fatigue machine for high temperature operation at resonance in vacuum. (USA) 1547.
abstracts
1527-1547
metallic inclusions in vacuum-deoxidized I-ton ingots of 0.20 per cent carbon steel. G H Ockenhouse and J E Werner, J Metals, 28 (I), 1966, 52-58. 37 1527. Beryllium fusion under vacuum. (Belgium) The fusion of beryllium by electron bombardment at 4 x IO-’ torr in a cooled metal crucible gave a beryllium with 350 ppm of hydrogen and 30 ppm of carbon. Fusion by high frequency in a Be0 crucible at lo-* torr gave 1200 ppm of hydrogen and 130 ppm of carbon. Mass spectrometry indicated a reaction of water in the residual gases with the Be above 600” to produce an important hydrogen partial pressure over the Be. B Schaub, Metallurgic, 5 (6), 1965, 215-229, (in French). 37 1528. Production of Ni-M&Fe wire for vacuum applications. (Hungary) V Eigner, Kohasz Lapok, 98 (II), 1965, 495-497, (in Hungarian). 37 1529. Vacuum purification of metals.
(Belgium)
The advantages of vacuum purification of metals, the thermodynamic principles of the elimination of oxygen, nitrogen, hydrogen, and sulphur by evaporation and decomposition and other chemical reactions influenced by vacuum, are reviewed. M Salesse, Metallurgic, 5 (6), 1965, 203-214, (in French). 37 1530. Vacuum siliciding of molybdenum with a controlled silicon supply rate. (USSR) V E Ivanov, et al, Zharostoikie Pokrytiya, Znst Khim, Silikatov, Tr Seminara,
Leningrad,
1965,
83-86,
37 (USA)
A review is presented with emphasis on practice and plant performance. G D Kelsey, Trans Znst Chem Eng, 43, 1965, T248-T255. 37 1532. Vacuum treating molten ferrochromium. (USSR) A method was developed for producing ferrochromium with less than 0.02 per cent carbon. By vacuum treating 400 kg of molten ferrochromium for 1 hr at a residual pressure in the furnace of 0.6-2.0 torr from 1670-17OO”C, the carbon content in the alloy can be reduced from 0.05-0.07 to 0.01-0.02 per cent. S V Bezobrazov, et al, Stal, 9, 1965, 820-823, (in Russian). 37 1533.
340-343. 37 1538. The use and development of vacuum degassing methods. (Czechoslovakia)
An account is given of degassing technology, the equipment used and the results obtained. Anon, Hutnicka Conf VSB v Ostrave, Sbornik Referata Ocelarske Sekec,
1965, (in Czech). 37
Regularities in elimination of non-metallic inclusions during vacuum arc melting. (USSR) Vacuum arc refining of ShKhl5 alloy steel used for ball bearings by remelting the electrodes of steel that are deoxidized with Mn, Si, and Al. L N Belyanchikov, Izv VU2 Chernaya Met, 7, 1965, 74-77, (in 1539.
Russian). 37 1540. Vacuum degassing of steel in the ladle at the Derrain works of la Societt? Fifes Lille-Cail. (France)
A detailed description is given of the installation and its operation. The process is intended mainly for manufacturing forgings and ingots for rolling with low hydrogen contents. J C Paurise, Centre Dot Sid&, 22 (12), 1965, 2655, (in French). 1541. Degassing of liquid steel - new industrial processes.
(in Russian).
1531. Practical aspects of continuous rotary vacuum filters.
in
liquid iron during vacuum fusion analysis. (Great Britain) N J3irks and D Booth, J Iron and Steel Inst, 204 (4), April 1966,
Vacuum metallurgical urocess for the manufacture of steel.
37 (France)
The induction stirring degassing processes of Republic Steel, the Thermaflow process of Armco and the Therm-i-Vat processes of Latrobe Steel are described. J Verge, Techn Mod, 57, 1965, 529-536, (In French). 37 1542. Novel steel refining process.
(Sweden)
The ASEA-SKF process, developed at the Hellefors Steelworks in Sweden, is described. Metal that has been melted or partly refined in another furnace is degassed during induction stirring, refined and finished in a ladle furnace from which teeming later takes place. M Tiberg, et al, Min Mag, 114, 1966, 22-27. 37 1543. Vacuum degassing in the ladle. First operating results at the Thionville Steel Works of La Soci& Lorraine-Escaut. (France)
A process of vacuum degassing in the ladle is described and the results of its first operating year reported, analysed and discussed. A Le Moyne, et al, Centre Doe Sidir, 11, 1965, 2473-2499, (in French). 37 1544.
Magnesite-chromite stopper sleeves for vacuum treatment of
steel. (USSR) The applicability of magnesite-chromite stopper sleeves under conditions of vacuum treatment of transformer, ball-bearing and stainless steel as well as in ladles for continuous casting, was investigated. It was found that during vacuum treatment of a quality structural steel at a residual pressure of 1.5-6 torr and with aggressive slags, magnesite-chromite sleeves wear faster than high aluminium tubes. A I Uzberg and N F Bugaev, Ogneupory, 12, 1965, l-7, (in Russian). 37 1545. Deoxidation of ball bearing steel with ferro-aluminium during vacuum treatment. (USSR)
It was established that the deoxidation practice in which ball bearing steel is deoxidized in a vacuum with Fe-Al after the addition of Fe-Si produces a cleaner steel. 0 Kh Fatkullin, et al, Metallurg, 12, 1965, 20-22, (in Russian). 37 1546. Effects of vacuum on the tensile properties of magnesium single crystals. (USA)
The tensile behaviour of Mg single crystals at a temperature of 26&2”C was investigated atIvarying pressure levels from 760 to 8 x lo’+ torr. D P Williams and H G Nelson, NASA Ames Research Center, CahA 1965,
25 pages. 37
Flexural fatigue machine for high temperature operation at resonance in vacuum. (USA) 1547.