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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005353
EISBN: 978-1-62708-187-0
... Abstract Gas porosity is a major factor in the quality and reliability of castings. The major cause of gas porosity in castings is the evolution of dissolved gases from melting and dross or slag containing gas porosity. Degassing is the process of removing these gases. This article describes...
Abstract
Gas porosity is a major factor in the quality and reliability of castings. The major cause of gas porosity in castings is the evolution of dissolved gases from melting and dross or slag containing gas porosity. Degassing is the process of removing these gases. This article describes the methods of degassing aluminum, magnesium, and copper alloys. It provides information on the sources of hydrogen in aluminum and gases in copper.
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Published: 01 January 2001
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Published: 01 August 2013
Fig. 18 Vacuum degassing apparatus for cold-mount preparation. Courtesy of Struers, Inc.
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in High-Strength Aluminum Powder Metallurgy Alloys
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
Fig. 4 Degassing can used for aluminum P/M processing. Source: Ref 2
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Published: 01 December 2008
Fig. 21 Comparison of the effectiveness of solid degassing flux versus nitrogen purging. Source: Ref 18
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Published: 01 December 2008
Fig. 12 Schematic of the vacuum induction degassing and pouring furnace
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Published: 01 December 2008
Fig. 5 Degassing efficiency as a function of purge gas bubble size. Source: Ref 5
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Published: 01 December 2008
Fig. 18 Comparison of the effectiveness of solid degassing flux versus nitrogen purging. Source: Ref 21
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Published: 01 December 2008
Fig. 26 Schematic of a combined ladle furnace (LF) and vacuum degassing (VD) plant. VOD, vacuum oxygen decarburization
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Published: 01 December 2008
Fig. 27 Schematic of a vacuum arc degassing plant layout. 1, transformer; 2, bus bars; 3, flexible cables; 4, electrode arms; 5, temperature-measuring and sampling device; 6, alloying lock; 7, electrode housing; 8, electrode masts; 9, operating platform; 10, lifting device for platform; 11
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Published: 01 December 2008
Fig. 30 Treatment cycle of a 75 Mg (80 ton) vacuum arc degassing-heated melt. 1, tapping; 2, additions of C + Al + 0.5% CaO; 3, temperature check; 4, sampling and temperature check; 5, addition of 1.5% alloys + 0.5% CaO; 6, temperature check; 7, additions + 0.5% CaO; 8, degassing; 9, venting
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Published: 01 December 2008
Fig. 31 Schematic of a vacuum induction degassing unit. (a) Top view. (b) Side view. 1, mold, die, or ladle; 2, charging device; 3, filter; 4, vacuum pumping system; 5, melt current supply; 6, vessel with vacuum bell; 7, gas-purging set; 8, cooling water manifold; 9, control cabinet; 10
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Published: 01 December 2008
Fig. 32 Effect of vacuum induction degassing (VID) processing on the (a) hydrogen, (b) nitrogen, and (c) total oxygen contents of X 38 CrMoV 51 die steel (Fe-0.38C-1.0Si- 0.40Mn-5.2Cr-1.3Mo-0.40V)
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in Components, Design, and Operation of Vacuum Induction Crucible Furnaces
> Induction Heating and Heat Treatment
Published: 09 June 2014
Fig. 9 Sketch of the vacuum induction degassing and pouring (VIDP) furnace in melting and casting operation. Courtesy of ALD Vacuum Technologies GmbH
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in Components, Design, and Operation of Vacuum Induction Crucible Furnaces
> Induction Heating and Heat Treatment
Published: 09 June 2014
Fig. 11 (a) Vacuum induction degassing and pouring (VIDP) furnace during casting operation. (b) Operation flexibility of the VIDP to be adapted for different casting systems. Courtesy of ALD Vacuum Technologies GmbH
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Published: 01 December 1998
Fig. 16 Schematic of a vacuum arc degassing plant layout. 1, transformer; 2, bus bars; 3, flexible cables; 4, electrode arms; 5, temperature-measuring and sampling device; 6, alloying lock; 7, electrode housing; 8, electrode masts; 9, operating platform; 10, lifting device for platform; 11
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Published: 01 January 2001
Fig. 3 Orientation of mechanical stirring device and degassing tube for crucible-style furnace
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Published: 30 November 2018
Fig. 4 Comparison between degassing methods versus flux injection/rotor dispersion degassing efficiency. Source: Ref 4 . Courtesy American Foundry Society
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