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Preheating

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Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310233
EISBN: 978-1-62708-326-3
...), martensitic, 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820013
EISBN: 978-1-62708-339-3
... of the weld 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250249
EISBN: 978-1-62708-345-4
... or configuration does 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900023
EISBN: 978-1-62708-350-8
..., why 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...
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: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310285
EISBN: 978-1-62708-326-3
... steps: Stress relieving Preheating Austenitizing Quenching (although for air-hardening tool steels, the quench is actually just cooling in still air or atmosphere) The first two steps lend themselves to relatively straightforward discussion, and the latter two are more easily...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.pht2.t51440191
EISBN: 978-1-62708-262-4
... (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, °C (°F) 760–845...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200369
EISBN: 978-1-62708-354-6
... composition and heat treatment. Carbon steels having low manganese and silicon contents (1.60% Mn, 1.00% Si), and a carbon content below 0.30%, can be welded without any special precautions. When the carbon content exceeds 0.30%, preheating of the casting prior to welding is advisable. The low-temperature...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
.... Typical parts that are induction surface hardened include: The single power-supply pulsing process uses a preheat of low or moderate power followed by a high power, for a very short pulse that can be 0.2 to 0.5 s. Experimentation may be needed to select the optimum frequency for a given pitch gear...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900067
EISBN: 978-1-62708-358-4
... Table 5-3 Hardening and tempering temperatures and procedures for tool steels Type Rate of healing Hardening Time at temperature, min Quenching medium( a ) Tempering temperature Preheat temperature Hardening temperature °C °F °C °F °C °F Molybdenum high-speed steels M1...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900125
EISBN: 978-1-62708-350-8
... without exception. This group can be preheat treated to give a supportive core for abrasive and impact applications, as well as torque loads. Once again, remember that the surface must be depassivated before nitriding. Corrosion resistance will be adversely affected but may be protected by using lower...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130503
EISBN: 978-1-62708-284-6
... ), 1986 , p 175s – 183s 6. Yurioka N. and Kasuya T. , A Chart Method to Determine Necessary Preheat in Welding , Weld. World , Vol 35 ( No. 5 ), 1995 , p 31 – 38 7. Yurioka N. and Kasuya T. , “ A Chart Method to Determine Necessary Preheat in Welding ,” IIW Doc...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820115
EISBN: 978-1-62708-339-3
... brittle, regardless of the prior condition of the metal (annealed, hardened, or hardened and tempered). Cracking can occur when the heated weldment and the surrounding martensitic HAZ are unable to contract to the same degree and at the same rate as the weld metal. Preheat and postweld cooling rates...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1988
DOI: 10.31399/asm.tb.eihdca.t65220001
EISBN: 978-1-62708-341-6
... which undergo induction heating during some stage of their production is very large and rapidly expanding. Induction heating applications and typical products Table 1.1 Induction heating applications and typical products Preheating prior to metalworking Heat treating Welding Melting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980323
EISBN: 978-1-62708-342-3
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290099
EISBN: 978-1-62708-306-5
... or inspection costs, which can vary widely depending on the specific application. Fig. 5.2 Spectrum of practical heat intensities used for fusion welding. Source: Ref 5.1 At high heat intensities, nearly all of the heat is used to melt the material and little is wasted in preheating...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060209
EISBN: 978-1-62708-355-3
... the optimal preheat [1] temperature. This temperature, as indicated from the plot in Fig. 3 , lies between the peak-ductility (PDT) and zero-ductility (ZDT) temperatures. Fig. 3 Hypothetical “on-heating” Gleeble curve of specimen reduction of area as a function of test temperature To confirm...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900109
EISBN: 978-1-62708-358-4
... with a minimum of distortion. Three types of salt baths are generally used: Preheating bath: minimizes thermal shock, equalizes temperature, and minimizes the amount of time required at the high-temperature stage High-temperature bath: serves as the austenitizing step Quenching bath: equalizes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460017
EISBN: 978-1-62708-285-3
... in the solid state onto the substrate. Thus, warm spraying ( Ref 2.14 – 2.18 ) and aerosol spraying ( Ref 2.19 – 2.22 ) are related processes. As compared to conventional thermal spray technology, cold spraying is relatively simple to implement. A pressurized gas, typically nitrogen or helium, is preheated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.htgpge.t67320017
EISBN: 978-1-62708-347-8
... be at operating temperatures. Placing gears at room temperature in the hot furnace may cause distortion or even cracking. This danger can be minimized by the use of a preheating furnace maintained at a temperature below the A 1 (720 °C, or 1330 °F). Gears preheated for a sufficient period can be transferred...