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convection heating

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440055
EISBN: 978-1-62708-262-4
... Abstract This chapter, a detailed account of furnaces and related equipment for heat treating, begins by describing three basic modes of heat transmission, namely conduction, convection, and radiation, followed by a discussion on the working principle, applications, advantages...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080259
EISBN: 978-1-62708-304-1
... Abstract This chapter discusses material-related problems associated with coal-fired burners. It explains how high temperatures affect heat-absorbing surfaces in furnace combustion areas and in the convection pass of superheaters and reheaters. It describes how low-NOx combustion technology...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870183
EISBN: 978-1-62708-314-0
..., and cooling, as depicted schematically in Fig. 6.1 . As with thermoset composites, the main processing variables are time ( t ), temperature ( T ), and pressure ( P ). Heating can be accomplished with infrared heaters, convection ovens, heated platen presses, or autoclaves. Since time for chemical reactions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430001
EISBN: 978-1-62708-253-2
... combustion gases. In watertube boilers, the fuel is combusted in a central chamber (furnace, bed, or grate) and the combustion gas transfers heat energy, through radiation and convection, to the water circulating through the tubes. The water tubes are connected to a steam drum at the top and one or more...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870201
EISBN: 978-1-62708-314-0
... typically use large racks to ensure even heat flow and to maximize the number of parts that can be loaded for cure. Fig. 7.9 Gas flow velocity turbulence near autoclave door At least three non-tool-related variables are known to affect convective heat transfer in an autoclave: (1) increasing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2011
DOI: 10.31399/asm.tb.cfw.t52860007
EISBN: 978-1-62708-338-6
... axes of motion are used. Fig. 2.13 Handling device loading five wound and cured parts into a conveyor system There are various types of high-volume production curing ovens. These can be convection heated using gas or electricity ( Fig. 2.14 ), internal mandrel oil heating ( Fig. 2.15...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410103
EISBN: 978-1-62708-280-8
... of two elements: surface heat transfer coefficient, h surface convective heat transfer coefficient, h c Their relationship is defined by 1/ h = 1/ h c + 1/ h surf , hence Eq 6.6 h = ( h c × h surf ) / h c + h surf A good...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500133
EISBN: 978-1-62708-317-1
... penetration into the passenger compartment can be prevented ( Ref 7.15 ). In the conventional hot stamping process, continuous furnaces are used whereby the blank is heated by radiation and convective flow of heat. The furnaces are heated with gas or electricity. The heating rate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780295
EISBN: 978-1-62708-281-5
... above T g , and T ∝ is the final temperature below T g . Stresses are further determined by m = HL /(thermal diffusivity), where m is the dimensionless Biot number, H is a convective heat-transfer coefficient, and 2 L is the sample thickness. In an effort to simplify the model...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310163
EISBN: 978-1-62708-326-3
... Abstract This chapter discusses the processes involved in the heat treatment of steel, namely austenitizing, hardening, quenching, and tempering. It begins with an overview of austenitizing of steels by induction heating, followed by a discussion on the processes involved in transformation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050139
EISBN: 978-1-62708-311-9
..., the polymer starts to redissolve. (f) After 75 s, polymer film has completely redissolved, and the heat removal is achieved entirely by convection. Source: Ref 1 The main factors for the selection of a quenchant are: The quench speed needed to produce the required hardness and case...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080423
EISBN: 978-1-62708-304-1
... Abstract Liquid metals are frequently used as a heat-transfer medium because of their high thermal conductivities and low vapor pressures. Containment materials used in such heat-transfer systems are subject to molten metal corrosion as well as other problems. This chapter reviews the corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.9781627083119
EISBN: 978-1-62708-311-9
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080409
EISBN: 978-1-62708-304-1
.... , Vol 179 , 1968 , p 755 10.2472/jsms.17.755 13. Srivastava S.K. , unpublished results, Haynes International, Inc. , 1989 14. Lai G.Y. , unpublished results, Haynes International, Inc. , 1989 15. Bradshaw R.W. , “ Thermal Convection Loop Corrosion Tests...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190001
EISBN: 978-1-62708-296-9
.... , and Han Q. , Effect of Power Ultrasound on Solidification of Aluminum A356 Alloy , Mater. Lett. , Vol 59 , 2005 , p 190 – 193 10.1016/j.matlet.2004.09.027 31. Banaszek J. , McFadden S. , Browne D.J. , Sturz L. , and Zimmerman G. , Natural Convection and Columnar...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240177
EISBN: 978-1-62708-251-8
... Abstract One of the primary advantages of steels is their ability to attain high strengths through heat treatment while still retaining some degree of ductility. Heat treatments can be used to not only harden steels but also to provide other useful combinations of properties, such as ductility...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080335
EISBN: 978-1-62708-304-1
... water is then further heated in superheaters (typically two superheaters—primary and secondary or final superheaters) to higher temperature in the convection path before it is delivered to turbines for electricity generation. The combustion flue gas exits from the furnace at the top and then enters...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060197
EISBN: 978-1-62708-261-7
... rates than convection, radiation, conduction, or even flame-impingement processes. Heat treating is a major application of induction heating, with surface hardening of steel and cast iron being the most prevalent use. However, induction heating is also applied to annealing, normalizing, through...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220009
EISBN: 978-1-62708-341-6
... to the induction coil, the power lost from the workpiece due to radiation and convection and the loss in the coil itself due to Joule heating must be added to P 1 . Heat loss by convection is usually small and is neglected in calculations of power requirements for typical rapid-heating applications. Radiation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080235
EISBN: 978-1-62708-304-1
... of Alloys , High Temperature Corrosion , Rapp R.A. , Ed., Conf. Proc. ( San Diego, CA ), March 2–6, 1981 , NACE, 1981 , p 398 15. Kanthal Handbook: Resistance Heating Alloys and Elements for Industrial Furnaces , Kanthal Heating Systems, Hall-stahammar , Sweden , p 7 16. AISI Type...