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direct chill process

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Image
Published: 01 December 2008
Fig. 4 Vertical direct chill casting. (a) General arrangement of process. (b) Mold assembly. Source: Ref 1 , 2 More
Image
Published: 30 November 2018
Fig. 4 Vertical direct chill casting. (a) General arrangement of process. (b) Mold assembly. Source: Ref 1 , 2 More
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006485
EISBN: 978-1-62708-207-5
..., and particle ingot and powder. It describes the molten metal processing and ingot casting process in terms of open-mold casting and direct chill process. The article examines the continuous processes that provide commercial alternatives to conventional ingot casting. It reviews the postsolidification processes...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005286
EISBN: 978-1-62708-187-0
... by downstream manufacturing processes. This article starts with a review of the different forms of ingot and the molten-metal processing techniques involved in ingot casting. It then describes the open-mold casting and direct chill (DC) ingot casting processes. The process variations and solidification...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005334
EISBN: 978-1-62708-187-0
... Abstract This article focuses on the variety of alloys, furnaces, and associated melting equipment as well as the casting methods available for manufacturing magnesium castings. These methods include sand casting, permanent mold casting, die casting, thixomolding, and direct chill casting...
Image
Published: 01 December 1998
Fig. 8 Preparation of metallic glass (amorphous metal) strip. (a) Schematic of the planar-flow casting method. The arrow indicates the direction of the material flow, which is identical to the direction of the chill wheel rotation. (b) Sheet of metallic glass prepared by the planar-flow More
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005287
EISBN: 978-1-62708-187-0
... shortness forces compromises in the steps normally taken to achieve directional solidification. Extensive localized chilling may aggravate crack formation. In these cases, more uniform casting section thickness, larger fillets, more gradual section thickness changes, larger risers and, in some cases, riser...
Image
Published: 01 December 2009
Fig. 1 Typical processing steps involved in the thermomechanical production of aluminum can stock. DC, direct chill More
Image
Published: 01 December 2004
Fig. 11 Feather crystals in an alloy 3003 ingot cast by the direct-chill semicontinuous process. Growth twins in the crystals. Polarized light. Barker's reagent. Original magnification 50×. Source: Ref 4 More
Image
Published: 01 June 2024
Fig. 12 SEM micrographs of aluminum alloy AA2219 showing the phases present and the morphology. (a) AA2219 direct chill (DC) cast and homogenized specimen showing the morphology of the coarse primary CuAl 2 present along with second-phase particles. (b) AA2219-T87 plate along the longitudinal More
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003727
EISBN: 978-1-62708-177-1
... by the direct-chill semicontinuous process. Growth twins in the crystals. Polarized light. Barker's reagent. Original magnification 50×. Source: Ref 4 In contrast to aluminum ingot alloys, the foundry eutectic alloys exhibit a very regular, mostly equiaxed structure, as shown in Fig. 12 . If properly...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005216
EISBN: 978-1-62708-187-0
... pressure. This is termed exudation and results in even higher positive macrosegregation at the surface. In direct chill casting of aluminum ingots, this macrosegregation can be so severe that the exuded surface layer must later be removed by scalping the ingot. Fig. 4 Inverse segregation in an A1...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006316
EISBN: 978-1-62708-179-5
..., dramatically increases the number of eutectic cells. The greater the number of cells, the smaller the degree of undercooling and consequently the lower the chilling tendency. A well-known radical method commonly employed in increasing the cell count in hypoeutectic iron is the inoculation process. The effects...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009016
EISBN: 978-1-62708-187-0
... of chills to extend FD. When applied to the edge of a casting section, the chill will withdraw heat rapidly, enhancing the development of directional solidification away from the edge. This will add to the length of the zone that will be sound due to end effect. Fig. 14 Effect of chills on feeding...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009015
EISBN: 978-1-62708-187-0
..., risers should be placed to achieve the maximum pressure differential and, when possible, should be open to the mold surface. Blind or enclosed risers must be adequately vented. Observe the principles of directional solidification. The use of chills, riser insulation, and casting design changes may...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005260
EISBN: 978-1-62708-187-0
..., or even salt. When nonmetal destructible cores are used, the process is called semipermanent mold casting. Basically, the process involves the following steps: A refractory wash or coating is applied to the surfaces of the preheated mold that will be in direct contact with the molten metal alloy...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004009
EISBN: 978-1-62708-185-6
... Abstract The primary objectives of the rolling process are to reduce the cross section of the incoming material while improving its properties and to obtain the desired section at the exit from the rolls. This article illustrates a rolling sequence for the fabrication of bars, shapes, and flat...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005525
EISBN: 978-1-62708-197-9
... the liquid velocities and melt pools in casting processes are small, the flows are not always laminar. In large-scale liquid metal processes, such as vacuum arc or plasma arc remelting, or direct chill or continuous casting, the flows can transition from laminar to turbulent and relaminarize in different...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003015
EISBN: 978-1-62708-200-6
... Abstract This article describes the extrusion process, which converts soft, plastic material into a particular form using an extruder, or screw conveyer. It discusses the two main types of plastic extruders, twin-screw and single-screw, estimation of extruder capacity, and design and operations...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009022
EISBN: 978-1-62708-187-0
... the cavity and attempts to flow in all directions. If the distance from the gate to the extremities of the mold cavity is too great, the metal freezes prematurely, and misruns result. When ribs are added to the plate, Fig. 1(b) , the metal flows readily to the extremities of the mold cavity, and successful...