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polymer quenching

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Published: 01 August 2015
Fig. 5.20 Tempered martensite: 1052 steel induction hardened with 14% polymer quench and tempered at 206 °C (400 °F). The as-quenched hardness is HRC 56.2. Nital etched. (a) 200×. (b) 1000×. Source: Courtesy of Aston Metallurgical Services, Inc. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050173
EISBN: 978-1-62708-311-9
... treated by induction without protective atmosphere or vacuum. Oil quenches tend to produce a higher degree of scale retention than do water or polymer quenches, and the higher the temperature of austenitization, the greater the amount of scale. Removal of scale and any resulting surface defects may...
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
... and the convection stage begins. (e) After 60 s, 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 Vapor Blanket Stage The vapor blanket stage occurs when the workpiece is first quenched...
Image
Published: 01 August 2015
Fig. 5.19 Untempered martensite: 1052 steel induction hardened with 14% polymer quench. The as-quenched hardness is HRC 62.1. Nital etch. (a) 200×. (b) 1000×. Source: Courtesy of Aston Metallurgical Services, Inc. More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050293
EISBN: 978-1-62708-311-9
..., and integral quench coil outlets are prone to clogging when either unfiltered or polymer-based quenchants are used. Some of the different types of polymer quenchants tend to build up with use, not only coating anything in contact with the quenchant but also tending to close and restrict the outlet holes. When...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050301
EISBN: 978-1-62708-311-9
... increases to the point that the scale will start flaking. With temperatures greater than 980 °C (1800 °F), the scale can be thick enough that on a finished part there is deterioration of the surface finish. Small pits or holes are formed that can be seen after the parts are quenched. polymer quench. Mixture...
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.smnm.t52140117
EISBN: 978-1-62708-264-8
... used to characterize the quenching power of the various commercially available quenching oils and polymer quenchants. Figure 12.13 is a set of cooling rate curves for several common quenching fluids. Notice that the maximum cooling rate occurs at different temperatures and varies from a high of 285...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380085
EISBN: 978-1-62708-456-7
... of the polymer-based water quenchants that are still heavily used today. Polymer quenchants have eliminated spotty hardnesses that were caused by vapor pocket formation. Polymers also provide more flexibility when used for quenching-induction-austenitized workpieces. The various quenchants used have...
Image
Published: 01 August 2015
Fig. 6.1 Photo sequence of a hot steel rod being quenched in a 25% polyalkylene glycol polymer in water solution. (a) When the rod is immersed, a polymer film forms on its surface. (b) After 15 s, polymer activates and begins to boil. (c) After 25 s, boiling occurs over the entire rod More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200327
EISBN: 978-1-62708-354-6
... concentration and is obtained by cooling at a rate equal to or greater than the critical cooling rate for the alloy. Quenching media include water, brine solutions, oil, water-polymer solutions, and in some cases inert gases. Water and oil are the media most commonly used for quenching steel castings. Water...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050263
EISBN: 978-1-62708-311-9
... operation Carbon restore Quenching speed is too slow Lower temperature of water or polymer quenchant Lower concentration of polymer quenchant Increase impingement of change method of application Change type to faster-speed quenchant Austenitizing temperature is too low Use a longer heat...
Image
Published: 01 October 2011
, water, or polymer quenchants. (b) Marquenching, which uses either salt or hot oil as a quenchant. (c) Austempering, which uses a salt as a quenchant. (d) Isothermal quenching, which uses either salt or hot oil as a quenchant More
Image
Published: 01 December 1996
Fig. 4-1 (a) Schematic illustration of the three stages of cooling upon quenching a steel into a liquid. (b) Photographs of a cylinder quenched into a polymer quenchant, showing the three stages of cooling. ((a) from J. Bodin and S. Segerberg in Quenching and Distortion Control , G.E. Totten More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780295
EISBN: 978-1-62708-281-5
... in the modulus, which occur in both annealed-quenched specimens and as-is injection-molded specimens. Physical Aging Physical aging at temperatures below the T g has been extensively studied in linear amorphous polymers ( Ref 3 , 4 , 36 – 39 ). This work has been extended to include cross-linked...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050191
EISBN: 978-1-62708-311-9
... RF heat 0.16 s Quench on, no delay (polymer based quench media) Quench time 8 s Return to load position Fig. 10.15 Dual-frequency contour, one coil. A single induction coil provides for heating and quenching, as employed for the thermal treatments indicated. AF, audio frequency; RF...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130255
EISBN: 978-1-62708-284-6
... with austempering processes. Retained austenite is most pronounced where manganese and nickel are major components. The best steels for austempering are plain carbon and chromium and molybdenum alloy steels (Ref 20) . Aqueous polymer quenchants may often be used to replace quench oils, but quench severity...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310055
EISBN: 978-1-62708-326-3
... from a suitable elevated temperature generally is accomplished by immersion of the hot steel into a vaporizable fluid such as water; petroleum, vegetable, or animal oil; aqueous polymer solution; or an aqueous (salt) solution. Other quenching media include molten salt, fluidized bed, or gas, although...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2024
DOI: 10.31399/asm.tb.phtpp.t59380223
EISBN: 978-1-62708-456-7
... and 150 kW). Each unit had program-controlled dual scanners and were also bussed for continuous-use applications. Two concentrations of temperature-controlled polymer quench (5 and 20%) were available for use in holding tanks at each unit. The electrical component cooling was with distilled water...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030211
EISBN: 978-1-62708-349-2
... in which skin-core effects can be present due to differences in heat transfer. The crystallinity that develops in thermoplastics depends on many factors, including the polymer backbone, structure, molecular weight, polydispersity, and secondary bonding (hydrogen, van der Waals) ( Ref 1 ). This is further...