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Preheating

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Published: 31 December 2020
Fig. 7 Preheating, austenitizing, and quenching tool steel with one-, two-, or three-step preheat before austenitizing. Quench in temperature; W, water; O, oil; or A, air More
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Published: 30 November 2023
Fig. 3.56 Fluidized furnace with the preheater and cooler. Source: Ref 24 . Reprinted with permission from Tinker Omega Inc. More
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Published: 30 November 2023
Fig. 6.5 External preheated blast unit More
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Published: 01 June 2016
Fig. 4.2 KINETIKS 4000-47 (30 kW preheater) system More
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Published: 01 June 2008
Fig. 23.5 Microstructure of hardened 440C stainless steel. Preheated ½ h at 760 °C (1400 °F), austenitized ½ h at 1025 °C (1875 °F), air cooled to 65 °C (150 °F), double tempered 2 h at 425 °C (800 °F). Original magnification: 500×. Source: Ref 3 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040247
EISBN: 978-1-62708-300-3
... Development Hot forging involves preheating, deformation, transfer, and dwell (resting) between operations and final postforging cooldown. Small-scale experiments were run to simulate these operations and to establish the relationship between variables and microstructures and to generate data...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900023
EISBN: 978-1-62708-350-8
... ammonia is used, distortion, and preheat treatment. ammonia distortion gas dissociation nitriding nitrogen liberation preheat treatment SEVERAL PROCESS PARAMETERS must be considered in order to ensure nitriding success in terms of metallurgy and distortion: Nitrogen source Heat...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310233
EISBN: 978-1-62708-326-3
..., and precipitation-hardening. In addition, information on special considerations for stainless steel castings is also provided. The heat treatment processes explained in the chapter are preheating, annealing, stress relieving, hardening, tempering, austenite conditioning, heat aging, and nitride surface hardening...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820013
EISBN: 978-1-62708-339-3
... and heat-affected zone (HAZ), solid-state phase transformations during welding, control of toughness in the HAZ, the effects of preheating and postweld heat treatment, and weld discontinuities. This chapter provides information on the classification of steels and the welding characteristics of each class...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250249
EISBN: 978-1-62708-345-4
... not lend itself to carburizing and quenching the entire part. This chapter focuses on the processes involved in the induction and flame hardening, covering the applicable materials, hardening patterns, preheat treatment, quenching, tempering, surface hardness, case depth, hardening problems, dual-frequency...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930365
EISBN: 978-1-62708-359-1
... Abstract This appendix provides reference tables listing weldability of cast irons, steels, and nonferrous metals. A process selection table for arc welding carbon steels is included, and recommended preheat and interpass temperature tables are also presented. This appendix includes information...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.9781627083591
EISBN: 978-1-62708-359-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440191
EISBN: 978-1-62708-262-4
...–1500) 775–800 (1425–1475) Rate of cooling, °C (°F) max per hour 22 (40) 22 (40) 14 (25) Typical annealed hardness, HB 156–201 183–229 192–229 Hardening Rate of heating Slowly Slowly Slowly Preheat temperature, °C (°F) (a) 650 (1200) 760 (1400) Hardening temperature...
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Published: 01 December 2006
Fig. 6.47 Furnace tunnel of a rapid-heating gas-fired furnace with nozzle boxes and nozzles for preheating the billets by exhaust gas circulation More
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Published: 01 December 2004
Fig. 7 Typical “on-cooling” Gleeble curves of specimen reduction of area as a function of test and preheat temperatures with typical hot-workability ratings indicated More
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Published: 01 February 2005
Fig. 19.1 Schematic of strain corresponding to 50% (0.5 fraction) dynamic recrystallization (DRX) for a given condition of temperature, strain rate, and as-preheated grain size More
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Published: 01 December 2004
Fig. D1.108 High-temperature aging characteristics for aluminum alloy 520.0-T4, sand cast. Effect of preheating at 250 °F. Tested at room temperature More
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Published: 01 January 1998
Fig. 5-10 Schematic diagram of high-speed tool steel hardening heat treatment steps. Two stages of preheating are shown. Source: Ref 19 More
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Published: 01 December 2015
Fig. 5 High-temperature sulfidic corrosion of 150 mm (6 in.) diameter carbon steel tube from radiant section of crude preheat furnace at crude distillation unit. Note accelerated attack on fire side. More
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Published: 01 October 2012
Fig. 6.14 Polarized light optical microstructures developed in a canned Ti-45Al-2Cr-2Nb billet preheated at the alpha transus temperature and extruded to a 6:1 reduction. (a) Center of extrudate. (b) Outer diameter of extrudate. Source: Ref 6.5 More