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vacuum arc remelting

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Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005510
EISBN: 978-1-62708-197-9
... Abstract This article provides an overview of the studies on computational modeling of the vacuum arc remelting (VAR) and electroslag remelting (ESR) processes. These models involve the axisymmetric analysis of the electromagnetic, flow, heat-transfer, and phase-change phenomena to predict...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005202
EISBN: 978-1-62708-187-0
... Abstract The vacuum arc remelting (VAR) process is widely used to improve the cleanliness and refine the structure of standard air melted or vacuum induction melted (VIM) ingots. It is also used in the triplex production of superalloys. This article illustrates the VAR process...
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Published: 01 December 2008
Fig. 1 Key components of a vacuum arc remelting furnace. Source: Ref 1 More
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Published: 01 December 2008
Fig. 2 Typical vacuum arc remelting rates for various steels and nickel- and cobalt-base superalloys More
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Published: 01 December 2008
Fig. 3 Modern vacuum arc remelting (VAR) furnace. (a) 30 ton VAR. (b) Operational components: 1, electrode feed drive; 2, furnace chamber; 3, melting power supply; 4, busbars/cables; 5, electrode ram; 6, water jacket with crucible; 7, vacuum suction port; 8, X - Y adjustment; 9, load cell More
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Published: 01 December 2008
Fig. 5 Melt rate versus vacuum arc remelting current (50 cm, or 20 in., ingot; a omposite graph from several independent sources). Source: Ref 1 More
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Published: 01 December 2008
Fig. 6 Vacuum arc remelting pool depth versus melt current. Source: Ref 1 More
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Published: 01 December 2008
Fig. 7 Process control parameters and set point functions in vacuum arc remelting More
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Published: 01 November 2010
Fig. 1 Schematic diagram of the conventional (a) vacuum arc remelting and (b) electroslag remelting processes. Courtesy of ATI Allvac More
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Published: 01 January 1990
Fig. 1 Consumable NbTi electrode being prepared for its final vacuum-arc remelt. Courtesy of Teledyne Wah Chang Albany More
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Published: 01 January 2005
Fig. 5 Longitudinal section of vacuum arc remelted (VAR) superalloy ingot melted under typical industrial conditions. Courtesy of Special Metals Corporation More
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Published: 01 December 2008
Fig. 4 Molten pool region in a vacuum arc remelted ingot. The relative sizes of annulus and arc gap are not to scale. Competing currents are illustrated for stirring by thermal buoyancy (rising of lower-density hot metal along the ingot centerline) versus the stirring by electromagnetic fields More
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Published: 01 December 2008
Fig. 3 Simulated macrosegregation of oxygen after 8700 s in the vacuum arc remelted slab ingot. Dimensions are in centimeters. More
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Published: 01 January 1996
Fig. 1 Comparison of the Charpy V-notch energy and fracture appearance of 2 1 4 Cr-1Mo steel produced by air, vacuum-arc remelting (VAR), and electroslag remelting (ESR) practices. Source: Ref 12 More
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Published: 01 November 2010
Fig. 2 Computational domain for analysis of the unsteady behavior of the vacuum arc remelting process (frame of reference attached to the top surface of the ingot) More
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Published: 01 November 2010
Fig. 5 Process schedule and predicted variation of the melt pool volume for a vacuum arc remelting process for Ti-6Al-4V alloy with and without stirring More
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Published: 01 December 2008
Fig. 2 Simulated velocities in the liquid pool and outline of the mushy zone in the vacuum arc remelted slab ingot after 8700 s. Dimensions are in centimeters. More
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Published: 01 November 2010
Fig. 8 Angular velocity, in-plane flow, and temperature fields in the ingot during a vacuum arc remelting process for Ti-6Al-4V alloy with magnetic stirring More
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Published: 01 November 2010
Fig. 7 Liquid fraction, flow, and temperature fields in the ingot during a vacuum arc remelting process for Ti-6Al-4V alloy (a) without and (b) with magnetic stirring More
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Published: 01 November 2010
Fig. 9 Distribution of oxygen and iron concentrations in the ingot near the end of melting in a vacuum arc remelting process for Ti-6Al-4V alloy without and with magnetic stirring More