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positive filtration

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Published: 01 December 2008
Fig. 3 Two modes of positive filtration. (a) Depth filtration. (b) Cake filtration More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005351
EISBN: 978-1-62708-187-0
... the factors that influence the formation of inclusions. The article describes the three basic methods of mechanically removing or separating inclusions from molten metal. The methods include sedimentation, flotation, and positive filtration. The article provides a discussion on the types of molten-metal...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006535
EISBN: 978-1-62708-207-5
..., drossing fluxes, cleaning fluxes, and furnace wall cleaner fluxes. The article reviews the basic considerations in proper flux selection and fluxing practices. It explains the basic principles of degassing and discusses the degassing of wrought aluminum alloys. The article describes filtration in wrought...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006134
EISBN: 978-1-62708-175-7
.... composites fabrication material selection porous powder metallurgy THE TECHNOLOGY TO FABRICATE lower-density, porous powdered metal (PM) materials provides unique engineering solutions for many applications, such as filtration, fluid flow control, flame arresting, fluidization, self-lubricating...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005923
EISBN: 978-1-62708-166-5
... measurement methods, temperature control, materials handling, and filtration processes during the agitation process. The maintenance of quenching installations is also discussed. agitators computational fluid dynamics fixtures quench tank design quenchants quenching safety precautions MUCH...
Series: ASM Handbook
Volume: 4F
Publisher: ASM International
Published: 01 February 2024
DOI: 10.31399/asm.hb.v4F.a0007006
EISBN: 978-1-62708-450-5
... for quenching in so-called cold oils (60 to 82 °C, or 140 to 180 °F), the viscosity of oil is low (2 to 3 cSt) and is similar to water at room temperature ( Fig. 3 ). Illgner also determined that the position of the part entering the quench chute significantly affected the sinking speed. It is suspected...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006448
EISBN: 978-1-62708-190-0
...: use of lead screens; protection against backscatter and scatter from external objects; and use of masks, diaphragms, collimators, and filtration. The article concludes with a discussion on image conversion media, including recording media, lead screens, lead oxide screens, and fluorescent intensifying...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005352
EISBN: 978-1-62708-187-0
... Abstract This article discusses various molten-metal treatments, namely fluxing, degassing, and molten-metal filtration. It focuses on various molten-metal handling systems for transporting, holding, or delivering molten metal to the mold/die system. These include launders, tundishes, holding...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005759
EISBN: 978-1-62708-171-9
.../fumes Visible light and ultraviolet (UV) radiation The configuration of a typical thermal spray cell ( Fig. 1 ), in most cases, centers on an enclosure structure that works with other subsystems (interlocks, controls, ventilation/filtration, etc.) to provide effective control and protection...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001244
EISBN: 978-1-62708-170-2
... lead alloys are used. For conventional sulfate baths, 6 to 8% antimonial (Sb) lead is preferred, whereas for solutions containing fluoride, lead alloys with 4 to 7% Sn are used. For an anode to provide optimum throwing power and coverage, it must be positioned properly in relation to the workpiece...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006455
EISBN: 978-1-62708-190-0
... of plates, cylinders, and flanges. The article discusses various control methods, including the use of lead screens; protection against backscatter and scatter from external objects; and the use of masks, diaphragms, collimators, and filtration. The radiographic appearance of specific types of flaws is also...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009017
EISBN: 978-1-62708-187-0
... positioned vertically in the drag just downstream of the sprue. Casting yield is 91%. The use of a ceramic filter in a gating system of conventional design can be effective in reducing inclusion-related defects, but a gating system designed specifically to incorporate ceramic filters will be more...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001263
EISBN: 978-1-62708-170-2
... for rough deposits. Filtration rates may need to be as high as whole-solution-volume recycling once or more per hour. Other aids in preventing roughness include using positive pressure of an inch or so with filtered air, plus keeping the electroforming room in extra-clean condition. The phenomenon...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001256
EISBN: 978-1-62708-170-2
... Anodes: 85Sn-15Pb Filtration: continuous through polypropylene or acrylic filter cartridges 80Sn-20Pb MSA Solution 80Sn-20Pb MSA solution ( Ref 4 ) is used for barrel plating of electronic components and applications requiring higher throwing power than the high-speed solution. The solution...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004171
EISBN: 978-1-62708-184-9
... due to proximity of etchers to each other or due to foreline maintenance Solvent Cleanup after Metal Etch Corrosion is due to: Solvent hood setup (dispersion plates) and filtration system Failure to maintain product time limits between metal lead etch and solvent cleanup Failure...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001245
EISBN: 978-1-62708-170-2
... in solution is present in the form of divalent positively charged ions (Ni ++ ). When current flows, the positive ions react with two electrons (2 e − ) and are converted to metallic nickel (Ni 0 ) at the cathode surface. The reverse occurs at the anode, where metallic nickel is dissolved to form divalent...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001739
EISBN: 978-1-62708-178-8
... of gravimetric analysis is the quantitative removal of the pure precipitate from the reaction medium for weighing. This is usually accomplished by filtration, followed by drying or ignition to a more stable form. For example, one common problem is coprecipitation, in which foreign ions from the sample solution...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005300
EISBN: 978-1-62708-187-0
... used by aluminum foundries to remove and separate inclusions from the molten aluminum alloy prior to casting. These include various methods of fluxing, degassing, and filtration in the furnaces and the gating systems ( Ref 3 , 6 , 7 , 8 , 9 , 10 , 11 ). Any of these techniques will have...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002165
EISBN: 978-1-62708-188-7
... discharge machining. Negative (standard) polarity is shown. Positive (reverse) polarity is also extensively used. Mechanism of Metal Removal Direct-current power is supplied to the circuit in pulses that can be approximated by a square wave. Ideally, each pulse creates a spark. Each spark occurs...
Series: ASM Handbook
Volume: 24A
Publisher: ASM International
Published: 30 June 2023
DOI: 10.31399/asm.hb.v24A.a0006981
EISBN: 978-1-62708-439-0
..., such as laser power/speed/position, laminar gas flow speed, build plate temperature, powder layer thickness, and so on. For an ideal system, the process parameters should be identical to their commanded value. Process variables are the measurable outputs from the AM process, such as the intensities...