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carbide segregation

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Image
Published: 01 December 1984
Figure 1-22 Macroetching with 10% nital was used to reveal carbide segregation in polished sections from various sizes of rounds of T1 high-speed tool steel. (Diameters in inches below sections.) More
Image
Published: 01 June 2008
Fig. 22.15 Carbide segregation at center of M2 round bars of various diameters. (a) 27 mm ( 1 1 6 in.). (b) 67 mm ( 2 5 8 in.). (c) 105 mm ( 4 1 8 in.). Original magnification: 100×. Source: Ref 5 More
Image
Published: 01 October 2011
Fig. 11.8 Longitudinal sections illustrating carbide segregation at the center of M2 round bars of various diameters. (a) 27 mm (1 1/16 in.). (b) 67 mm (2 5/8 in.). (c) 105 mm (4 1/8 in.). Original magnification: 100×. Source: Ref 11.9 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900029
EISBN: 978-1-62708-358-4
... pouring also permits the use of mold flux, which can improve ingot surface quality. Internal quality, including the amount of pipe and carbide segregation, may also be improved by bottom pouring. Following casting, ingots are usually annealed to prevent cracking (depending on the alloy) or hot stripped...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410621
EISBN: 978-1-62708-265-5
... Fig. 24.6 Schematic diagram of tool steel hardening heat treatment steps. Source: Ref 24.26 The high alloy content of multicomponent tool steels results in significant segregation and primary alloy carbide formation during solidification. The high-speed tool steels, by virtue of their very...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220551
EISBN: 978-1-62708-259-4
... (duplex), and precipitation hardening stainless steels. It also describes solidification sequences and explains how chromium carbides may segregate to grain boundaries at certain temperatures, making grain boundary regions susceptible to intercrystalline or intergranular corrosion. austenitic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850001
EISBN: 978-1-62708-260-0
... of segregation and its associated problems. Etching is pronounced at the segregate-matrix interface, and segregate or matrix areas may etch out, leaving pits. Sulfides or carbides may also etch out, leaving pits. Before the investigator can distinguish between pits due to nonmetallic inclusions or segregates...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220353
EISBN: 978-1-62708-259-4
... of carbides. Etchant: nital 4%. Courtesy of Villares Metals S.A., Sumaré, SP, Brazil. 11.2.5 Effects on the Macroscopic Properties The combination of changes on the distribution of segregates and inclusions and the potential for weld forging the voids and microporosity formed during solidification...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060273
EISBN: 978-1-62708-261-7
... during metal cutting operations, which permitted much higher cutting speeds, feeds, and depths of cut to be used during machining. This new tungsten carbide alloy was demonstrated at the Paris Exposition of 1900 and was so effective that it virtually made every other tool steel in the world obsolete...
Image
Published: 01 January 1998
Fig. 14-11 Mixed grain size in high-speed steel, heated to 1295 °C (2360 °F), caused by marked segregation of carbide particles More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240411
EISBN: 978-1-62708-251-8
... Tool Steels As a result of pronounced ingot segregation, conventional tool steels often contain a coarse, nonuniform microstructure accompanied by low transverse properties and problems with size control and hardness uniformity during heat treatment. Carbide segregation in M2 steel annealed bars...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560205
EISBN: 978-1-62708-353-9
... that concentration gradients formed during solidification upon casting are minimized; this is briefly described in this chapter. Austenitization topics covered in this chapter are dendritic segregation in steels, austenitization to remove coring, ingot segregation, grain growth behavior, formation of austenite...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130285
EISBN: 978-1-62708-284-6
... austenitizing temperature was found to be associated with more pronounced TME, favoring brittle failure modes, even in specimens showing virtual absence of phosphorus segregation. These investigations found that high austenitizing temperatures increase carbide dissolution in austenite, apparently due to more...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000059
EISBN: 978-1-62708-313-3
... a significant positive influence on the creep life. Ruthenium has been added to the new generation of single-crystal alloys to suppress dendritic segregation and inhibit topologically close-packed phase (tcp) formation. Lastly, carbon is added for carbide formation, which strengthens grain boundaries...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240177
EISBN: 978-1-62708-251-8
... wt%, up to 90% of the carbon segregation takes place during quenching. Since the carbon atoms can reduce their energies more by segregating to dislocation sites than by forming transition carbides, no transition carbides form in steels with less than approximately 0.2 wt% C. In steels containing more...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220475
EISBN: 978-1-62708-259-4
... significant reductions in the carbon content, thus reducing solidification segregation and improving weldability and toughness in these steels. Most of these new compositions are also designed with thermomechanical treatments in mind, instead of the classical route of hot working followed by heat treatment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560283
EISBN: 978-1-62708-291-4
... as the second stage, and precipitation of cementite as the third stage of tempering. Effects Observable by Light Microscopy Carbon Segregation No effects due to carbon segregation can be observed by light microscopy. Carbide Precipitation Precipitation of ε carbides (or η carbides) can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000025
EISBN: 978-1-62708-313-3
... Sulfocarbides Sulfur has been thoroughly shown to be very detrimental to the stress-rupture life of nickel-base alloys at concentrations above approximately 50 ppm. Sulfur strongly segregates to grain boundaries and particularly strongly to carbide-matrix interfaces ( Ref 31 ). The latter segregation...
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
... for achieving fully ferritic structures as-cast or with minimal annealing. Minor Elements Promoting Carbides Chromium, vanadium, and boron are all carbide promoters. Manganese may accentuate the carbide-stabilizing effects of these elements, especially in heavy sections in which segregation promotes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... Oxide (?) Anhydrated ammonia Nitride CO/CO 2 /H 2 O Carbide CS 2 /H 2 O Carbide Titanium alloys Chloride Hydride Aluminum alloys, steels Various media Near-surface hydrogen The Phenomenon of SCC Stress-corrosion cracking is a delayed failure process. That is, cracks...