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rapid quenching

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Published: 01 October 2011
Fig. 9.19 Microconstituents formed in plain carbon steels on rapid quenching from austenite into isothermal baths at the temperatures shown. Source: Ref 9.2 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240135
EISBN: 978-1-62708-251-8
... 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. precipitation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140213
EISBN: 978-1-62708-264-8
... includes labels identifying the microconstituents that form in plain carbon steels under rapid quenching conditions. cementite iron-carbon phase diagram microstructure ...
Image
Published: 01 November 2007
Fig. 3.67 Honeycomb samples after testing at 950 °C (1750 °F) for 154 h for the alloy X honeycomb sample (a) and 317 h for the 214 honeycomb sample (b) in a high-velocity combustion gas stream (0.3 Mach or 100 m/s) generated by a dynamic burner rig. The samples were also subjected to rapid More
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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410335
EISBN: 978-1-62708-265-5
... 16.16 shows center hardness as function of bar diameter for the chromium-nickel SAE 3140 steel quenched in oil and water. Each quenching medium 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...
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
... of martensitic steels. chemical composition microstructure deformation mechanical properties hot forming tempering 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...
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 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...
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
... finish temperature, M f .) Fig. 12.1 Cooling curve at the surface and center of a rapidly quenched bar of 5140 steel superimposed on the continuous transformation curve Martempering A major problem with rapid quenching of steel is the formation of both distortion and quench cracks...
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: 30 June 2023
DOI: 10.31399/asm.tb.atia.t59340035
EISBN: 978-1-62708-427-7
... aluminum alloys would increase the strength, given the well-known fact that steel could be hardened by a high-temperature soak followed by rapid cooling ( quenching ) in water. Surprisingly, he found that quenching did not result in immediate hardening, but the quenched alloy did harden over time at room...
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...
Image
Published: 01 December 2018
Fig. 6.16 Typical microstructures of low-carbon steel boiler tube samples showing (a) elongated grains near tensile rupture resulting from rapid overheating below the recrystallization temperature, 200×; and (b) mixed structure near rupture resulting from rapid overheating between Ac 1 and Ac More
Image
Published: 01 August 2018
Fig. 9.66 Formation of pro-eutectoid allotriomorphic ferrite in medium carbon steel containing C = 0.5% and Mn = 1.5% isothermally transformed at (a) 723 °C (1335 °F), (b) 688 °C (1270 °F), followed by quenching. Quenching was not sufficiently rapid to avoid the formation of a thin layer More
Image
Published: 01 August 2015
Fig. 5.17 IT diagram and cooling curve for 4340 steel: effect of section size. (a) The cooling curve for a 25.4 mm (1 in.) diam AISI 4340 steel bar in relation to the CCT curve for AISI 4340 steel. The cooling rate is sufficiently rapid to quench the entire bar to martensite. (b) A 76 mm (3 More
Image
Published: 01 August 2018
of the MA areas is revealed by a rapid tempering at 200 °C (390 °F) for 2 h ( Ref 9 ). Intercritical treatment at 750 °C (1380 °F) for 4 min followed by quenching and austempering at 375 °C (705 °F) (a) for 1 min (b) for 5 min. Ferrite (F), bainite (B), and retained austenite (A). SEM, SE. Etchant: nital More
Image
Published: 01 August 2018
). The structure of the MA areas is revealed by a rapid tempering at 200 °C (390 °F) for 2 h ( Ref 9 ). (a) Treatment inside the critical zone at 750 °C (1380 °F) for 4 min followed by quenching and austempering at 375 °C (705 °F) for 3 min. Ferrite (F), martensite (M), and retained austenite (A). Etchant: nital More
Image
Published: 31 December 2020
Fig. 23 Upper critical temperature for annealed, normalized, and quenched and tempered AISI 1042 steel as a function of rapid heating rate. Sources: Ref 21 , 22 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240177
EISBN: 978-1-62708-251-8
... 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 The term annealing is a heat treatment in which a metal or alloy is heated to a certain high temperature and held...