1-20 of 241 Search Results for

preheat treatment

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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: 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 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900125
EISBN: 978-1-62708-350-8
... to the hardenable martensitic stainless steels. Cycles for Gas Nitriding of Stainless Steels In general, the single-stage process is used with a process temperature in the region of 490°C (925 °F) (depending on steel composition and preheat treatments), with time at temperature ranging from 24 to 48 h...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900119
EISBN: 978-1-62708-350-8
... formation Diffused formed-case uniformity Correct preheat treatment, including stress relieving and stabilization Consistent steel chemistry and microstructural homogeneity Correct grain flow pattern Uniform cooling Growth will take place due to nitrogen diffusion into the steel surface...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900185
EISBN: 978-1-62708-350-8
... metallurgy. The remedy is to ensure removal of more than 10% of the surface stock thickness. A decarburizing condition during the preheat treatment operation that has left the surface seriously decarburized Components that exhibit these surface conditions cannot be salvaged and are scrap. Should...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900153
EISBN: 978-1-62708-350-8
... of choice is H13, which is classified as a deep-hardening chromium hot-work steel containing 5% Cr and 0.40% C. This steel can be readily water cooled while in service and has a good toughness factor after nitriding—provided that the preheat treatment has been done correctly in terms of core hardness...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310285
EISBN: 978-1-62708-326-3
...; or A, air Multiple-Step Preheating For workpieces with very complex shapes, and for very large pieces or large furnace loads, it may be advisable to use a two- or three-step preheating treatment. In a two-step treatment ( Fig. 7 ), the first preheat temperature is somewhat below the lower critical...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140157
EISBN: 978-1-62708-264-8
... these steels are often fairly brittle, it is important to avoid any crack formation induced by thermal stresses on heat treating. Therefore, it is usually recommended that the steels be given a stress-relief anneal after rough machining to shape and also a preheat treatment after finishing machining...
Image
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
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 March 2006
DOI: 10.31399/asm.tb.pht2.t51440191
EISBN: 978-1-62708-262-4
... or by certain mechanical properties, and still others by the method of heat treatment (precisely by the quenching technique). Actually, through the mediums of shop language and the published literature, tool steels have become somewhat automatically classified on such a basis. For instance, the terms high-speed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900031
EISBN: 978-1-62708-350-8
... of a good nitrided surface. If decarburization has occurred from mill rolling and insufficient machine cleaning, or if the preheat treatment operation was carried out in a decarburizing atmosphere, then a nonuniform case will form. The result is usually visible in the form of an “orange peel” effect...
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
... guide for arc welding carbon steels is given in Table A4 . Table A5 through A8 include recommended preheat and interpass temperatures for selected thicknesses of structural carbon steels, preheat and postweld heat treatment of steel pressure vessel and pipe welds, and recommended preheat...
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 July 1997
DOI: 10.31399/asm.tb.wip.9781627083591
EISBN: 978-1-62708-359-1
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 January 1998
DOI: 10.31399/asm.tb.ts5.t65900067
EISBN: 978-1-62708-358-4
... of high-speed tool steel hardening heat treatment steps. Two stages of preheating are shown. Source: Ref 19 Austenitizing for hardening must accomplish several critical functions for the subsequent quenching and tempering heat treatment stages: Establish the volume fraction of undissolved...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930179
EISBN: 978-1-62708-359-1
... and are the common choice for equipment and fabricated component assemblies, because of their weldability. Mild steels (up to 0.25% C) are readily weldable and, in cross sections of less than 50 mm (2 in.), usually do not require any preheat or postweld heat treatment. Hardened heat-affected zones (HAZ...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
... into various types of tools and track pins manufactured for off-highway equipment. camshaft lobes gears induction surface hardening shafts through hardening SINCE ITS INTRODUCTION in the 1930s, induction heat treatment has been applied to a large variety of mass-produced commercial products...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900013
EISBN: 978-1-62708-350-8
... process, and the stresses begin to be relieved from the steel. If distortion is to be kept to a minimum, then it is necessary to introduce an interim stress-relieving procedure after the preheat treatment and rough machining and before the final machining and nitriding process. The stress relief process...