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shrinkage cavities

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130151
EISBN: 978-1-62708-284-6
.... (a) Sharp corners create high strain concentration. (b) Exaggerated relief causes a shrinkage cavity. (c) Ideal relief The risks will be reduced if steel with increased temperability is chosen, which requires a less severe quenching medium, such as oil or air. Other strategies in the design of cast...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720365
EISBN: 978-1-62708-305-8
... porosity, shrinkage porosity, and shrinkage cavities) are not usually found in forgings. Second, for the types of internal discontinuities that are commonly found in forgings (inclusions, pipe, bursts, or flakes), ultrasonic inspection is more effective, more adaptable, and more economical...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280041
EISBN: 978-1-62708-267-9
... the molten metal will fill the shrinkage occurring upon solidification lower in the electrode. Fig. 4.7 Schematic of bottom-pour teeming in EAF/AOD melting Argon oxygen decarburized electrodes also may be top poured, but the need to continually close the teeming ladle tap, transfer the ladle...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220129
EISBN: 978-1-62708-259-4
... of solidification. No etching. In killed (fully deoxidized) steel there is no gas evolution during solidification. To avoid the presence of internal shrinkage cavities in castings or ingots (pipe, porosity, etc.), it is necessary to take measures to concentrate this contraction in a certain portion...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740047
EISBN: 978-1-62708-308-9
... less space than the liquid; in other words, it will shrink in volume. Because this shrinkage occurs at the point of solidification, the volume deficit, which is called the shrinkage cavity, is found at the location of the last liquid to solidify. Figure 4 shows the formation of a shrinkage cavity...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.9781627082709
EISBN: 978-1-62708-270-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430409
EISBN: 978-1-62708-253-2
..., if any. Discontinuities such as cracks, fissures, flakes, laminations, shrinkage cavities, and pores can be detected using ultrasonic testing. This technique is also used for measuring the oxide scale thickness of high-temperature tubes. Advanced techniques such as time-of-flight diffraction and phased...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410029
EISBN: 978-1-62708-280-8
... the cavity is filled, the pressure is increased to approximately 15 psi (0.10 MPa) to feed the liquid shrinkage. The semipermanent molding (SPM) process increases the versatility of GPM using expendable sand cores. Cores are produced by air set, cold box, shell, SO 2 , or other processes. Because...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780051
EISBN: 978-1-62708-281-5
..., and so on. The relationship between the variables is complex, but essentially concerns the packing of extra molecules of plastics into the cavity before the melt has frozen in the gate area of the cavity. One should also keep in mind that mineral fillers decrease shrinkage because inorganic materials...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610055
EISBN: 978-1-62708-303-4
...Abstract Abstract This chapter discusses the causes and effects of ductile and brittle fracture and their key differences. It describes the characteristics of ductile fracture, explaining how microvoids develop and coalesce into larger cavities that are rapidly pulled apart, leaving bowl-shaped...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290111
EISBN: 978-1-62708-319-5
... a component. In some approaches, the voids between particles are saturated with binder. In other approaches, a volatile solvent phase is added to reduce viscosity, allowing shaping at low pressures. Many shaping processes require tooling, including a mold cavity. The mold is created to generate the target...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870285
EISBN: 978-1-62708-314-0
... of the screw into the mold. The molten material flows through the nozzle into a water-cooled die where it flows through a sprue, a runner system, and finally the gate into the mold cavity. When the mold is completely filled, the screw remains stationary to keep the thermoplastic in the mold under pressure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410151
EISBN: 978-1-62708-280-8
... of a tilt-poured oil pan casting Fig. 7.31 Shapes of pouring cups, (a) ceramic, (b) cast iron, (c) two cavity ceramic Fig. 7.24 Modulus calculations. M, modulus, V, volume, A, surface area Fig. 7.23 Brake master cylinder feeding alternatives, (a) near net shape bore, (b...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000039
EISBN: 978-1-62708-312-6
... Restrictions No inside closed cavities Corner radius greater than 0.075 mm Smallest hole diameter 0.1 mm Weight range 0.02 g to 20 kg No undercuts on internal bores 2┬░ draft on long parts Minimum thickness 0.2 mm Desirable features Gradual section thickness changes Weight...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060085
EISBN: 978-1-62708-261-7
... the part that is cast does not undergo hot or cold working operations subsequent to casting. These alloys are cast into a mold cavity and the resulting cast shape, with minor surface finishing, represents the shape of the finished product. Cast materials typically require less labor and fewer...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410103
EISBN: 978-1-62708-280-8
... velocity Ensuring no metal splash out of pour hole. Biscuit size control. Safety and cleanliness Plunger speed below 10 in./sec Slow shot velocity Control to allow air in shot sleeve to vent out before the start of cavity fill ( Fig. 6.15 ) Position B ( Fig. 6.16 ) fixed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.9781627082914
EISBN: 978-1-62708-291-4
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140165
EISBN: 978-1-62708-264-8
... of the presence of this microporosity is that steel ingots can form with no apparent shrink cavity along their centerline. When the volume of the microporosity equals that of the shrinkage volume, the solid solidifies with the same shape as the liquid. This occurs for the small wootz ingots used to make Damascus...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140021
EISBN: 978-1-62708-335-5
..., molten metal is injected under pressure into water-cooled dies. Pressure is maintained until the part has solidified. Molten metal usually enters the mold by the action of a hydraulic ram in a containment chamber (shot chamber), resulting in rapid filling of the mold cavity. While lubrication is required...