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isothermal heat treatment

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Published: 01 December 2004
Fig. 74 Microstructure (picral etch, 500×) of AISI S7 tool steels with isothermal heat treatments. (a) Held at 704 °C (1300 °F) for 30 min (only a small amount of transformation before quenching). (b) Held at 704 °C (1300 °F) for 4 h (almost complete transformation to pearlite) More
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Published: 01 January 2005
Fig. 12 Potentiodynamic scans conducted on fully amorphous (solid line) and fully crystalline, following 550 °C (1020 °F) isothermal heat treatment (dotted line), Al 87 Co 7 Ce 6 alloys compared to polycrystalline aluminum (dashed line) in deaerated 0.6 M NaCl solution. SCE, saturated calomel More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003195
EISBN: 978-1-62708-199-3
... decomposition of austenite design criteria formation of austenite heat treating of steels heat treatment iron-carbon phase diagram isothermal transformation diagrams physical metallurgical principles plastic deformation quench residual stress thermomechanical treatments Principles of Heat Treating...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005962
EISBN: 978-1-62708-168-9
..., solutionizing heat treatment, and isothermal aging in detail. It concludes with a review of the interrelationships between heat treatments, microstructures, and mechanical properties. alloying copper precipitation-strengthened steel heat treatment mechanical properties microhardness microstructure...
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Published: 30 September 2015
Fig. 12 Tensile properties of PM Udimet 720 turbine disk produced by extrusion plus isothermal forging (heat treatment: 1090 °C (2000 °F) + two-step age). Source: Ref 34 More
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006339
EISBN: 978-1-62708-179-5
... AUSTEMPERED DUCTILE IRON (ADI) results from a specialty heat treatment of ductile cast iron. Strength improvements in combination with excellent toughness can be realized by using this process. Austempering is an isothermal heat treatment that, when applied to ferrous materials, produces a structure...
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Published: 30 September 2015
Fig. 13 Fatigue crack growth rates for PM Udimet 720 turbine disk produced by extrusion plus isothermal forging (heat treatment: 1090 °C (2000 °F) + two-step age) compared to cast and wrought (C/W) Udimet 720. Source: Ref 34 More
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006094
EISBN: 978-1-62708-175-7
... Although as-HIP René 95 is in current use, most René 95 production involves extrusion of preconsolidated powder followed by isothermal forging and heat treatment. Tensile and creep rupture properties for thermomechanically processed PM René 95 are given in Tables 6 and 7 . Typical low-cycle fatigue...
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Published: 30 September 2015
Fig. 6 Tensile properties of extruded plus isothermally forged PM N18 compared to PM Astroloy and PM IN-100 (N18 heat treatment: 1165 °C (2130 °F)/4 h/cooled at 100 °C/min + 700 °C (1292 °F)/24 h/air cool + 800 °C (1472 °F)/4 h/air cool). Source: Ref 29 More
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Published: 30 September 2015
Fig. 8 Crack growth rates at 650 °C (1202 °F) for extruded plus isothermally forged PM N18 compared to PM Astroloy and PM IN-100 (N18 heat treatment: 1165 °C (2130 °F)/4 h/cooled at 100 °C/min + 700 °C (1292 °F)/24 h/air cool + 800 °C (1472 °F)/4 h/air cool). Source: Ref 29 More
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Published: 30 September 2015
Fig. 7 Larson-Miller creep rupture curves for extruded plus isothermally forged PM N18 compared to PM Astroloy and PM IN-100 (N18 heat treatment: 1165 °C (2130 °F)/4 h/cooled at 100 °C/min + 700 °C (1292 °F)/24 h/air cool + 800 °C (1472 °F)/4 h/air cool). Astr., Astroloy; Str. rupt., stress More
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005949
EISBN: 978-1-62708-168-9
... steels, and discusses the classification of carbon steels for heat treatment. The article also discusses the estimation of continuous cooling curves from isothermal transformation curves. It provides information on the Jominy end-quench test and the Grossmann method and the procedures to increase...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005929
EISBN: 978-1-62708-166-5
... hardening externally heated furnaces heat treatment immersed-electrode furnaces isothermal quenching furnaces salt baths salt quenching steel submerged-electrode furnaces SALT BATHS are used commercially in a wide variety of heat treating operations including neutral hardening, tempering...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006296
EISBN: 978-1-62708-179-5
...Abstract Abstract Cast irons, like steels, are iron-carbon alloys but with higher carbon levels than steels to take advantage of eutectic solidification in the binary iron-carbon system. This article introduces the solid-state heat treatment of iron castings and describes the various processes...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003993
EISBN: 978-1-62708-185-6
... by isothermal forging and heat treatment. More information on P/M superalloys is in the article “Powder Metallurgy Superalloys” in Powder Metal Technologies and Applications , Volume 7 of the ASM Handbook ( Ref 20 ). Gatorizing Powder metallurgy billets can then be superplastically forged. Pratt...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003723
EISBN: 978-1-62708-177-1
... which are useful in determining the conditions for proper heat treatment (solid-state transformation) of metals and alloys. The influence of the mechanisms of phase nucleation and growth on the morphology, size, and distribution of grains and second phases is also described. bainite eutectic...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005819
EISBN: 978-1-62708-165-8
... diagram ferrite heat treatment iron-carbon phase diagram isothermal transformation martensite pearlite residual stress steel thermal stress Introduction Heat treatment is roughly defined as controlled heating and cooling of a solid material, so as to change the microstructure and obtain...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003985
EISBN: 978-1-62708-185-6
..., require isothermal techniques to produce sound forgings. Attempts to apply the hot-die forge process to P/M nickel-base superalloys generally encounter problems such as incomplete die fill, cracking, and nonuniform grain growth during subsequent solution heat treatment ( Ref 5 ). Isothermal Forging...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006250
EISBN: 978-1-62708-169-6
..., and grain growth. The article also describes the various types of solid-state transformations such as isothermal transformation and athermal transformation, resulting from the heat treatment of nonferrous alloys. It provides information on the homogenization of chemical composition within a cast structure...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005573
EISBN: 978-1-62708-174-0
...: Ref 1 Simplified Solution for a Fast-Moving High-Power Source It follows from Eq 2 that the isotherms behind the heat source become increasingly elongated as the power, q 0 , and the welding speed, ν, increase. In the limiting case, when q 0 →∞, ν→∞ and q 0 /ν remains finite...