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isothermal heat treatment

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130285
EISBN: 978-1-62708-284-6
... are also provided. The cases covered are grinding cracks on steel cam shaft and transgranular and intergranular crack path in commercial steels. tempering steel mechanical test temper embrittlement hydrogen embrittlement liquid-metal embrittlement isothermal heat treatment grinding cracks...
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Published: 01 August 2018
Fig. 9.29 Bainite formed in isothermal heat treatment at 400 °C (750 °F) (austempering in liquid lead bath). Etchant: nital. More
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Published: 01 August 2018
Fig. 9.30 Bainite formed in isothermal heat treatment at 250 °C (480 °F) (austempering in a salt bath). Etchant: nital. More
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Published: 01 August 2018
Fig. 10.80 Austempering is an isothermal heat treatment resulting most times in bainitic structures. After austempering, tempering is not required. B = bainite, M = martensite, F = ferrite, P = pearlite, A = austenite. More
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Published: 01 December 1996
Fig. 7-19 Schematic isothermal TTT diagram showing the heat treatment of martempering. (Adapted from H. Webster and W.J. Laird, Jr., in Metals Handbook , Vol 4, p 137, Heat Treating , ASM International, Materials Park, Ohio (1991), Ref 6 ) More
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Published: 01 December 1996
Fig. 7-20 Schematic isothermal TTT diagram showing the heat treatment of austempering. (From J.R. Keough, W.J. Laird, Jr., and A.D. Gooding, Metals Handbook , Vol 4, p 152, Hear Treating , American Society for Materials, Materials Park, Ohio (1991), Ref 7 ) More
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Published: 01 August 2018
Fig. 10.9 Cylindrical bars of AISI 4340 steel. Each figure presents the macrograph (no etching) and the corresponding micrograph. (a)–(c): Bars with 25 mm (1 in.) diameter, austenitized in a hydrogen atmosphere at 1120 °C (2050 °F) and subjected to isothermal heat treatment at 338 °C (640 °F More
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Published: 01 January 2015
Fig. 6.13 Isothermal transformation diagram for 4340 steel and isothermal heat treatments applied to produce various microstructures for fracture evaluation. Source: Ref 6.16 More
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Published: 01 March 2012
Fig. 15.37 Isothermal transformation diagram for 4340 steel and isothermal heat treatments applied to produce various microstructures for fracture evaluation. Source: Ref 15.24 as published in Ref 15.19 More
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Published: 01 August 2018
Fig. 10.11 Results of the heat treatment of samples of steel AISI 4340 charged with a high content of hydrogen, superimposed on the TTT curve. The samples have suffered isothermal heat treatment at the indicated temperatures and times, and were then quenched. “F” indicates the occurrence More
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Published: 01 August 2018
Fig. 9.32 Isothermal transformation in a steel containing C = 0.5%, Mn = 1.5% at 538 °C (1000 °F). The specimens are rapidly cooled from the austenitization temperature to the isothermal heat treatment temperature. They are then maintained at this temperature for the times indicated in each More
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Published: 01 August 2018
the isothermal heat treatment temperature at t = 0 (a). SIM. See Ref 55 and 83 for details. Source: Ref 55 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410099
EISBN: 978-1-62708-265-5
... ). Fig. 6.13 Isothermal transformation diagram for 4340 steel and isothermal heat treatments applied to produce various microstructures for fracture evaluation. Source: Ref 6.16 The distribution of very fine carbides in plates of lower bainite suggests that a ferrite crystal has initially...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220273
EISBN: 978-1-62708-259-4
...): Bars with 25 mm (1 in.) diameter, austenitized in a hydrogen atmosphere at 1120 °C (2050 °F) and subjected to isothermal heat treatment at 338 °C (640 °F) for (a) 2 min (b) 6 min (c) 22 min, followed by rapid cooling. (d) Bar with 45 mm (1.7 in.) diameter, austenitized in a hydrogen atmosphere at 1120...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220193
EISBN: 978-1-62708-259-4
... 28 Fig. 9.29 Bainite formed in isothermal heat treatment at 400 °C (750 °F) (austempering in liquid lead bath). Etchant: nital. Fig. 9.30 Bainite formed in isothermal heat treatment at 250 °C (480 °F) (austempering in a salt bath). Etchant: nital. Fig. 9.31 Bainite...
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Published: 01 August 2018
Fig. 10.13 Heat treatment cycles for preventing hydrogen cracks superimposed on a hypothetical CCT curve. The “isothermal” cycle is the most commonly used. For steels in which diffusive decomposition of austenite is too slow, the “continuous cooling” heat treatment leads to good results More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040257
EISBN: 978-1-62708-300-3
... control of the working temperature and strain rate. It describes the materials typically used as well as equipment and tooling, die heating procedures, part separation techniques, and postforging heat treatment. forgings hot-die forging isothermal forging nickel alloys titanium alloys 20.1...
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Published: 01 August 2005
with the composition C αL . After solidification is complete, the remaining β phase can be dissipated by a homogenization heat treatment (stage 4). More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700023
EISBN: 978-1-62708-279-2
...,” transformation produces a feathery microstructure called bainite. Figure 2.5 shows a superimposed isothermal heat treatment curve ( ABCD ) where austenite begins its transformation at T > 725 °C. It is then rapidly cooled to T = 625 °C (1160 °F) and then held at constant temperature of 625 °C until...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1996
DOI: 10.31399/asm.tb.phtpclas.t64560235
EISBN: 978-1-62708-353-9
.... The samples were austenitized for 1.4 h at each temperature. (Adapted from J.J. Yi, I.S. Kim, and H.S. Choi, Metallurgical Transactions , Vol 16A, p 1237 (1985), Ref 9 ) Fig. 7-20 Schematic isothermal TTT diagram showing the heat treatment of austempering. (From J.R. Keough, W.J. Laird, Jr...