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decarburization

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050175
EISBN: 978-1-62708-311-9
... Abstract This chapter explains how to recognize decarburization and related defects. It includes images showing how decarburization appears in various steels, discusses stock removal practices, and describes common defects and flaws such as quench cracks and where they are typically found...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440275
EISBN: 978-1-62708-262-4
... Abstract This appendix discusses in brief the sources of decarburization of steels as well as the effect of heat treatment on the process. decarburization heat treatment steel DECARBURIZATION is defined as “a loss of carbon atoms from the surface of a ferrous material, thereby...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770037
EISBN: 978-1-62708-337-9
... Abstract This chapter explains how decarburization can occur during carburizing processes and how to limit the severity of its effects. It describes the reactions and conditions that result in a loss of carbon atoms and how they vary with changes in the physical metallurgy of the affected...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560361
EISBN: 978-1-62708-291-4
..., and uniformity. It provides examples of oxides that form beneath the surface of steel and explains why it occurs. It describes the conditions associated with decarburization and explains how to determine the depth of decarburized layers in eutectoid, hypoeutectoid, and hypereutectoid steels. It also discusses...
Image
Published: 01 June 1985
Fig. 3-29. Microstructure, 250×. 4% nital etch. Gross decarburization of carburized SAE 4118 steel above matrix of tempered martensite. More
Image
Published: 01 December 2018
Fig. 5.5 Cross section of superheater tube sample that has undergone decarburization Location Decarb depth, μm 1 384.7 2 397.5 3 394.9 4 359.3 5 361.8 Avg 379.6 More
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Published: 01 December 2018
Fig. 6.48 Decarburization and discontinuous intergranular cracking in a carbon steel boiler tube resulting from hydrogen damage, (a) unetched view, 200× and (b) etched view, 200× More
Image
Published: 01 March 2006
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 More
Image
Published: 01 March 2006
Fig. 2 Decarburization in a 1.3% C hypereutectoid steel (1.20C-0.17Si-0.40Mn) in the quench-hardened condition. Austenitized at 850 °C (1560 °F), water quenched, tempered at 175 °C (350 °F). (a) 1% nital etch, 250×. (b) Variation of hardness with depth in the quenched and tempered More
Image
Published: 01 March 2006
Fig. 3 Depth of decarburization of a cold-worked steel in a fluidized bed in air. Source: Ref 1 More
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Published: 01 August 2018
Fig. 11.57 Forging lap. (a) Macrograph. (b) Ferrite, pearlite. Decarburization and oxides inside the discontinuity. Etchant: nital 2%. (c) Extensive decarburization and presence of oxides in the discontinuity. Etchant: nital 2%. Courtesy of M.M. Souza, Neumayer-Tekfor, Jundiaí, SP, Brazil. More
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Published: 01 August 2018
Fig. 17.99 Whiteheart malleable cast iron. Region that did not suffer decarburization. Ferrite, pearlite, and graphite. Sulfides can also be seen (gray tone). Courtesy of DoIT-PoMS, Department of Materials Science and Metallurgy, University of Cambridge. More
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Published: 01 September 2008
Fig. 9 Decarburization of carburized steel. Each small scale division is 2 μm. More
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Published: 01 September 2008
Fig. 22 Surface of a microfused component showing surface decarburization More
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Published: 01 September 2008
Fig. 49 Micrograph of poorly carburized SAE 8620 mold showing decarburization at the surface (note patches of ferrite and pearlite). Below this zone is where the grain-boundary carbides are seen. Original magnification: 500×. Courtesy of G. Vander Voort, Buehler Ltd., Lake Bluff, IL More
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Published: 01 September 2008
Fig. 52 Iron-carbon equilibrium diagram to explain decarburization More
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Published: 01 September 2008
Fig. 53 Micrographs illustrating total and partial decarburization. (a) Total decarburization of 1018 steel caused by a furnace air leak. Etchant: 1% nital. Original magnification: 500×. (b) Illustration of partial decarburization. Original magnification: 190× More
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Published: 01 September 2008
Fig. 54 Effect of decarburization on the residual stresses of carburized and hardened 3.5Ni-1.5Cr steel. The carbon content at 0.002 mm was approximately 1% for curve 1, 0.64% for curve 2, and 0.35% for curve 3. More
Image
Published: 01 August 1999
Fig. 12.7 (Part 1) Decarburization in a 0.8% C eutectoid steel. 0.78C-0.30Mn (wt%). (a) and (b) Transverse section of a hot-rolled bar; normalized. Arrows indicate total depth of decarburization. (a) Picral. 50×. (b) Picral. 100×. (c) and (d) Austenitized at 850 °C, water quenched More
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Published: 01 August 1999
Fig. 12.7 (Part 2) Decarburization in a 0.8% C eutectoid steel. 0.78C-0.30Mn (wt%). (a) and (b) Transverse section of a hot-rolled bar; normalized. Arrows indicate total depth of decarburization. (a) Picral. 50×. (b) Picral. 100×. (c) and (d) Austenitized at 850 °C, water quenched More