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rapid quenching

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240135
EISBN: 978-1-62708-251-8
..., which takes place during heat treatment; and true dispersion hardening, which can be achieved by mechanical alloying and powder metallurgy consolidation. It provides information on the three steps of precipitation hardening of aluminum alloys: solution heat treating, rapid quenching, and aging...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140213
EISBN: 978-1-62708-264-8
.... It also includes labels identifying the microconstituents that form in plain carbon steels under rapid quenching conditions. cementite iron-carbon phase diagram microstructure ...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410335
EISBN: 978-1-62708-265-5
... produces a different critical diameter associated with the rapid changes in hardness with bar diameter close to Rockwell C 50. Judging the position of 50% martensite from hardness changes with bar diameter can be difficult, as for example in the water-quenching data of Fig. 16.16 . Therefore, the probable...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140021
EISBN: 978-1-62708-264-8
... the production of hypo- and hypereutectoid steels and the effect of cooling rate on microstructure. It also examines quenched steels and the phase transformations associated with rapid cooling. It describes the development of lath and plate martensite, retained austenite, and bainite and how to identify...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140061
EISBN: 978-1-62708-335-5
... to achieve the highest postquench degree of retained solution. Rapid cooling from solution temperature to room temperature is critical, difficult, and often the least-controlled step in thermal processing. Specifications often define or recommend quench delay limits. In practice, the shortest possible...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700127
EISBN: 978-1-62708-279-2
... Martensite Special Attributes of Martensitic Steels MARTENSITIC (MS) STEELS are produced by quenching carbon steel from the austenite phase into martensite. Martensite is formed when rapid cooling of austenite traps carbon atoms that do not have time to diffuse out of the transforming face-centered...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350087
EISBN: 978-1-62708-315-7
... hardening. In ferritic malleable gray iron, melting enhances the diffusion of carbon, and the ensuing rapid quench produces a hardened region. Metallurgical Changes Metallurgical changes with laser melting are in the forms of grain refinement, solid solutions, and fine dispersions of precipitates...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230145
EISBN: 978-1-62708-298-3
... been known since the early 1970s. Amorphous alloys have no long-range order like conventional crystalline materials and are generally made by rapid quenching of molten alloy by a splat process, by a melt spinning process that produces ribbon, by a planar flow casting process that produces wide ribbon...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140117
EISBN: 978-1-62708-264-8
... of austenitizing in molten salts include very rapid heating, uniform temperature distribution, and avoidance of surface oxidation and decarburization. (See Ref 12.23 , p 309, for a detailed discussion.) Salt bath quenching is used when the goal is to quench very rapidly to elevated temperatures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 1998
DOI: 10.31399/asm.tb.ts5.t65900125
EISBN: 978-1-62708-358-4
... is low, and severe brine or water quenching is required to produce martensitic microstructures (hence the term water hardening to describe this type of steel). Despite rapid quenching, the water-hardening tool steels may harden only to shallow depths. In some applications, such as cold header dies...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090333
EISBN: 978-1-62708-266-2
... possess an extremely high corrosion resistance ( Ref 13.1 ). The mechanical behavior of amorphous alloys prepared by rapid quenching from the liquid state (by melt spinning, for example) is also remarkable. They are very strong and stiff, but tough; for example, amorphous iron-base alloys have a fracture...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240349
EISBN: 978-1-62708-251-8
.... Such rapid quench rates are undesirable because there is no opportunity for stress relief during cooling; that is, warping and distortion are more likely to occur during rapid quenching. These stresses, superimposed on the transformation stresses caused by the volume expansion that occurs when martensite...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700023
EISBN: 978-1-62708-279-2
... carbide (Fe 3 C). Cementite forms in the presence of high carbon concentrations. A two-phase mixture called pearlite forms at lower carbon content and is made up of alternating layers of soft ferrite and hard cementite. Martensite is a very hard phase that results from the very rapid quenching...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 May 2018
DOI: 10.31399/asm.tb.hma.t59250047
EISBN: 978-1-62708-287-7
... Martens) because it was believed at that time that the high-temperature microstructure was retained on rapid quenching. That was shortly corrected, and Osmond named this high-temperature phase austenite, after the English metallurgist Sir William Chandler Roberts-Austen. Roozeboom’s work started a trend...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
... very rapid and accurate application of the quenchant to force immediate and rapid quenching. The power requirements are dictated by the power required for the application. Small through-heating applications such as the small armature shafts can be run on RF power supplies as low as 5 kW. The large...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480075
EISBN: 978-1-62708-318-8
... rapid. Thus, high alloy contents and high temperatures approaching, but below, the eutectoid temperature favor intermetallic compound formation. Next, consider an alloy of composition C 2 (eutectoid alloy) quenched from a temperature in the beta field to T α. In this instance, the beta...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030211
EISBN: 978-1-62708-349-2
... ultrathin sections of a high-temperature thermoplastic-matrix carbon fiber composite that were exposed to different cooling rates. (a) Slow cooled. (b) Fast cooled followed by annealing. (c) Fast cooled. Transmitted polarized light, 100× objective In the aforementioned example, the rapid quenching...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280135
EISBN: 978-1-62708-267-9
... shapes subject to excessive distortion, oil quenching is often adequate and more practical. Rapid air cooling usually is adequate for parts formed from strip or sheet. Rapid cooling from the annealing or solution treating temperature does not suppress the aging reaction of some alloys, such as Astroloy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240177
EISBN: 978-1-62708-251-8
... structure, is critical and may vary between slow furnace cooling to rapid cooling by quenching in water. Fig. 11.3 Effect of cooling rate on microstructure. Source: Ref 1 11.1 Annealing 11.2 Process Annealing and Stress Relief 11.3 Normalizing 11.4 Spheroidizing 11.5 Hardening...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030169
EISBN: 978-1-62708-282-2
... hardened and often receive no further thermal treatments. Quenching The rate of cooling (quench rate) of aluminum products following either elevated-temperature fabrication or heat treatment can have a significant impact on the corrosion resistance of heat treated alloys. Rapid quenching generally...