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hypereutectoid microstructure

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240153
EISBN: 978-1-62708-251-8
...Abstract Abstract This chapter examines the isothermal phase transformations of the iron-carbide system. The discussion includes the formation of ferritic, eutectoid, hypoeutectoid, hypereutectoid, bainitic, and martensitic microstructures as well as their properties, composition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140021
EISBN: 978-1-62708-264-8
... the production of hypo- and hypereutectoid steels and the effect of cooling rate on microstructure. It also examines quenched steels and the phase transformations associated with rapid cooling. It describes the development of lath and plate martensite, retained austenite, and bainite and how to identify...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140009
EISBN: 978-1-62708-264-8
...-carbon (hypoeutectoid) and high-carbon (hypereutectoid) steels are made, how they are classified, and how they compare. It also describes eutectoid steels which, at 0.77 wt% C, form a separate class noted for its microstructure. chemical composition eutectoid steel iron-carbon phase diagram...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560221
EISBN: 978-1-62708-291-4
... to 275 °C, held for 5 s, heated at 475 °C, held for 5 s, and water quenched. Fig. 9.25 (Part 1) Proeutectoid cementite and pearlite formation in isothermal transformation of 1.2% C hypereutectoid steels. 1.18C-0.19Si-0.25Mn (wt%). (a) Austenitized at 960 °C, transformed at 705 °C for 5 s...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410315
EISBN: 978-1-62708-265-5
... microstructure. Figure 15.10 shows an isothermal transformation diagram for eutectoid steel and the transformation temperature range to produce the desired fine pearlite microstructure for wire drawing ( Ref 15.33 ). The microstructures, strengths, and ductilities of a hypereutectoid steel are shown...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560003
EISBN: 978-1-62708-353-9
... of John Wiley & Sons, Inc. (b) Microstructures showing primary iron carbide and pearlite in a hypereutectoid steel cooled slowly from the austenite region. In the low magnification optical micrograph on the left, the primary carbide appears as dark lines outlining the prior austenite grain boundaries...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440275
EISBN: 978-1-62708-262-4
... Fig. 1 (a) Decarburization in a 0.8% C eutectoid steel, 0.78C-0.30Mn. Picral etch, 50×. (b) Transverse section of a hot-rolled bar; normalized. Arrows indicate total depth of decarburization. Picral etch, 100×. Source: Ref 2 Fig. 2 Decarburization in a 1.3% C hypereutectoid steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420143
EISBN: 978-1-62708-310-2
..., hypoeutectoid, and hypereutectoid structures and how they are affected by the addition of various alloying elements. The chapter also discusses the formation of peritectoid structures in the uranium-silicon alloy system. eutectoid structures eutectoid transformation hypereutectoid structures...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310029
EISBN: 978-1-62708-326-3
... equilibrium conditions Ac 3 The temperature at which transformation of ferrite to austenite is completed during heating Ar 3 The upper critical temperatures when a fully austenitic microstructure begins to transform to ferrite during cooling Ae em In hypereutectoid steel, the critical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
... annealing of hypereutectoid steels is to produce a more dispersed distribution of cementite with a spherical morphology ( Fig. 9.8 ). Because some austenite is present at temperatures above A 1 , cooling practice through transformation is a crucial factor in achieving the desired microstructure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400023
EISBN: 978-1-62708-258-7
... hypereutectoid binary iron-carbon alloy would be iron Fe-1.4% C. From Fig. 2.3 , upon cooling from 1000 to 960 °C (1832 to 1760 °F), the microstructure remains 100% austenite. At 960 °C (1760 °F), the Ar cm , proeutectoid cementite begins to form. At the eutectoid temperature of 727 °C (1340 °F), the remaining...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560185
EISBN: 978-1-62708-291-4
... , respectively. Fig. 8.11 (Part 1) Austenitic grain growth in a 1.4% C hypereutectoid steel (aluminum treated). 1.42C-0.21Si-0.36Mn-0.002Al (wt%). A cm = ~965 °C. (a) Austenitized at 900 °C, cooled at 300 °C/h. 230 HV. Sodium picrate. 100×. (b) Austenitized at 900 °C, cooled at 300 °C/h. 230 HV...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.9781627083263
EISBN: 978-1-62708-326-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560235
EISBN: 978-1-62708-353-9
... Microstructure typical of those of dual phase steels. The steel contained 0.06% C and 1.5% Mn and was water quenched from 760°C. (Adapted from G.R. Speich, in Fundamentals of Dual-Phase Steels , The Metallurgical Society, Warrendale, PA (1981), Ref 10 ) Fig. 7-25 (a) Microstructures of a 0.05% C, 1.5...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430027
EISBN: 978-1-62708-253-2
... until the eutectoid composition is reached. At the eutectoid temperature, the remaining austenite of the eutectoid composition transforms isothermally to pearlite as per the eutectoid reaction discussed above. Figure 3.11 shows the microstructures of hypoeutectoid and hypereutectoid steel. Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410277
EISBN: 978-1-62708-265-5
... fine, and the austenite transforms to uniform, fine ferrite/pearlite microstructures during air cooling. The latter microstructures provide excellent starting microstructures for subsequent hardening heat treatments. As noted in Fig. 13.1 , normalizing of high-carbon, hypereutectoid steels may...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140107
EISBN: 978-1-62708-264-8
... will generally consist of ferrite and cementite. In hypoeutectoid steels, the cementite is usually present as pearlite, and in hypereutectoid steels, it will be present either as pearlite or a mixture of pearlite and cementite particles. In plain carbon steels, ferrite is essentially pure iron (Fe+0.02% or less...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560029
EISBN: 978-1-62708-291-4
... that a microscopical examination of steel is carried out first to identify the various phases and mixtures of phases in the microstructural constituents and, second, to specify the proportions, distributions, and dispersions of these constituents. From these features the origin of the microstructure may be deduced...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440009
EISBN: 978-1-62708-262-4
...% C. 1000×. (b) Microstructure (all pearlite grains) of a eutectoid steel containing 0.77% C. 2000×. (c) Microstructure of a eutectoid steel containing 0.77% C with all cementite in the spheroidal form. 1000×. (d) Microstructure of a hypereutectoid steel containing ~1.0% C containing pearlite...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560361
EISBN: 978-1-62708-291-4
...%). Normalized. Picral. 250×. Fig. 12.13 (Part 1) Decarburization in a 1.3% C hypereutectoid steel in the normalized and spheroidized conditions. 1.29C-0.17Si-0.40Mn (wt%). Although these two specimens are from the same batch of steel, they differ in depth of decarburization. The spheroidized material...