1-20 of 375 Search Results for

graphite formation

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240453
EISBN: 978-1-62708-251-8
... Abstract The properties of cast iron are determined primarily by the form of carbon they contain, which in turn, is controlled by modifying compositions and cooling rates during casting. Certain alloys (such as Si, Al, Ni, Co, and Cu) promote graphite formation, while others (such as S, V, Cr...
Image
Published: 01 August 1999
Fig. 7.6 (Part 4) (j) Isothermal transformation curve for the formation of graphite in a 1% C steel (1.00C-0.23Si-0.44Mn) initially water quenched from 825 °C and tempered at 700 °C for 15 min. The curve represents the time required at each temperature for 28.5% of the carbon to transform More
Image
Published: 01 August 2018
graphite. (c) Graphite formation inside areas of cementite, still present in the microstructure. (d) Graphite formed is not compact in shape. (e) Blackheart malleable cast iron. (Compare to ductile cast iron structures, in the section “ 17.5 Nodular Cast Iron or Ductile Cast Iron ” in this chapter More
Image
Published: 01 October 2011
Fig. 10.4 Effect of alloying elements on the formation of either graphitic or white cast iron during eutectic solidification. Source: Ref 10.3 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220583
EISBN: 978-1-62708-259-4
..., and examines the growth mechanisms and structural details that set them apart. It also discusses the formation of compacted (vermicular) graphite and malleable iron, and compares and contrasts the composition, properties, and heat treatment of whiteheart and blackheart malleable types. chilled cast iron...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140175
EISBN: 978-1-62708-264-8
... applications. It is possible for graphite to form in steels, in which case the steel is said to have graphitized. Graphitization sometimes occurs when steel is held at high temperatures for months or years, as in steam lines. So, graphite formation in steels is not of general practical importance...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320207
EISBN: 978-1-62708-332-4
... in damping of vibrations. Low residual magnesium leads to a high amount of graphite flakes. This results in low strength and ductility. Nodule percentage and flake graphite formation are both influenced by the cooling rates of the casting walls. High cooling rates result in higher nodule counts, and slow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320031
EISBN: 978-1-62708-332-4
... of introducing an adequate number of stable nuclei into the melt for the crystallization of graphite at the beginning of eutectic solidification. This is done to prevent the formation of iron carbide. Under equilibrium conditions, solidification is initiated when the melt reaches the eutectic solidification...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170107
EISBN: 978-1-62708-297-6
... between resistance to abrasion and the toughness needed to withstand repeated impact. All high-alloy white irons contain chromium to prevent formation of graphite on solidification and to ensure the stability of the carbide phase. Most also contain nickel, molybdenum, copper, or combinations...
Image
Published: 01 November 2007
in the formation of cementite (Fe 3 C) at the surface, (c) and later the formation of graphite on top of cementite and then decreases in a c to one ( a c = 1 for graphite) at the cementite in contact with graphite, (d) thus, cementite becomes unstable and decomposes into iron and carbon, with iron migrating More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170062
EISBN: 978-1-62708-297-6
... Not detected Essentially insoluble Essentially insoluble Increases nodule count; optimizes inoculation … Primary elements C 3.00–4.00% 3.00–4.00% 3.00–4.00% Present as spheroids or carbides Excess results in graphite formation Si 1.80–3.00% 1.80–3.00% 1.80–2.75% Promotes graphitization...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730069
EISBN: 978-1-62708-283-9
... graphite formation; thus, carbon occurs as iron carbide (cementite). White cast iron is very hard and brittle and finds applications only where surfaces must be hard to resist wear. Exercises Density of Austenite versus Ferrite Stretch a piece of music wire (piano wire) between two fixed posts...
Image
Published: 01 October 2011
Fig. 10.12 Proeutectic graphite. (a) Kish graphite in as-cast gray iron (Fe-4.3C-1.5Si-0.5Mn-0.12P-0.08S). (b) Formation of lumpy or starlike proeutectic graphite with rapid cooling of a hypereutectic alloy. As-polished. Original magnification: 100× More
Image
Published: 01 November 2007
C 3 , (c) continued carbon ingress increases the carbon activity to more than one ( a c > 1), resulting in the formation of metastable M 3 C carbides in low-nickel alloys, or resulting in direct growth of graphite in high-nickel alloys, (d) graphite deposition occurs decreasing the carbon More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410017
EISBN: 978-1-62708-265-5
... lines show the equilibrium between graphite and the other phases. Graphite is a more stable form of carbon than Fe 3 C and, given very long periods of time, Fe 3 C will decompose to graphite. Graphitization is rare in steels and requires alloying to promote graphite formation. For example, carbon...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060247
EISBN: 978-1-62708-261-7
... can be modified during solidification of gray irons, or graphite morphology can be developed by heat treatment (decomposition) of cementite in white irons. Fig. 10.3 Basic microstructures and processing for obtaining common commercial cast irons The formation of stable (graphite...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170100
EISBN: 978-1-62708-297-6
... Metallurgical Control The desired formation of temper carbon in malleable irons has two basic requirements: graphite should not form during the solidification of the white cast iron, and graphite must be readily formed during the annealing heat treatment. These metallurgical requirements influence...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.9781627083324
EISBN: 978-1-62708-332-4
Image
Published: 01 August 2018
Fig. 17.107 Malleable cast iron, as cast (before the malleabilization heat treatment). The region close to the surface (to the right of the image) shows the formation of graphite due either to deviation in chemical composition or changes caused by the mold material. Courtesy of J. Sertucha More
Image
Published: 01 August 2018
Fig. 8.24 The solidification of an alloy with a hypo-eutectic composition X 0 begins with the formation of austenite in accordance with the schematic phase diagram. As austenite forms, the interdendritic liquid gets richer in carbon until the composition of the eutectic, X E , is reached More