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Jominy testing
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Published: 01 August 2013
Fig. 28 (a) Jominy test reproducibility results from tests by nine laboratories on one heat of 4068 steel. (b) Reproducibility between different organizations using standard Jominy system. Source: Ref 12 , 17
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Published: 01 January 1986
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in Hardenability Calculation of Carbon and Low-Alloy Steels with Low or Medium Carbon
> Steel Heat Treating Fundamentals and Processes
Published: 01 August 2013
Fig. 6 Summary of reported Jominy tests by several laboratories on SAE 8620 steel of approximately the same chemical composition and grain size. Source: Ref 7
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Published: 01 August 2013
Fig. 43 Summary of reported Jominy tests by several laboratories on an (a) SAE 8620 steel and a (b) 4140 steel of approximately the same composition and grain size. Source: Ref 34
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Published: 31 August 2017
Fig. 13 Hardness along two Jominy test samples of ductile iron of the same chemical composition. B-R, recrystallized (small austenite grain size); B-NR, nonrecrystallized (very large austenite grain size). Source: Ref 14
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Published: 01 January 2000
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Published: 01 February 2024
Fig. 16 Superposition of cooling curves obtained along a Jominy test bar on the time-temperature-transformation (TTT) curve of steel. Note fastest cooling on the water-quenched end, yielding a martensitic microstructure, and slowest cooling on the air-quenched end, yielding a pearlitic
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Published: 01 February 2024
Fig. 14 (a) Schematic of a typical quenching apparatus used for the heated Jominy test bar. (b) Illustration of a typical Jominy curve, generated from a Jominy test bar after end quenching and grinding
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Series: ASM Handbook
Volume: 4F
Publisher: ASM International
Published: 01 February 2024
DOI: 10.31399/asm.hb.v4F.a0006996
EISBN: 978-1-62708-450-5
..., hardenability of the steel, and quench severity. Steel-Hardening Criterion Although it is typically difficult to quantitatively assess martensite content microscopically as 100% martensite is obtained, traditional use of fracture tests show that it is possible to identify 50% martensite (also known...
Abstract
Hardening and depth of hardening of steel is a critically important material and process design parameter. This article presents a selective overview of experimental and predictive procedures to determine steel hardenability. It also covers the breadth of steel hardenability, ranging from shallow, to very difficult to harden, to air-hardening steels.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003103
EISBN: 978-1-62708-199-3
... be easily and consistently reproduced from one test to another. These include the Jominy end-quench test, the carburized hardenability test, and the surface-area-center hardenability test. This article discusses the effects of varying carbon content as well as the influence of different alloying elements...
Abstract
Hardenability is usually the single most important factor in the selection of steel for heat-treated parts. The hardenability of steel is best assessed by studying the hardening response of the steel to cooling in a standardized configuration in which a variety of cooling rates can be easily and consistently reproduced from one test to another. These include the Jominy end-quench test, the carburized hardenability test, and the surface-area-center hardenability test. This article discusses the effects of varying carbon content as well as the influence of different alloying elements on hardenability of steels. The basic information needed before a steel with adequate hardenability can be specified as the as-quenched hardness required prior to tempering to final hardness that will produce the best stress-resisting microstructure; the depth below the surface to which this hardness must extend; and the quenching medium that should be used in hardening.
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005796
EISBN: 978-1-62708-165-8
... of shallow-hardening, low-carbon, plain carbon, and low-alloy medium-carbon steels ranging from classical fracture and etching, Grossmann hardenability, and Jominy end-quench testing to manual and computerized computational methods. The article then uses this as a backdrop for the implementation of the core...
Abstract
Hardenability is a composition-dependent property of steel and depends on carbon content and other alloying elements as well as the grain size of the austenite phase. This article provides an overview of a wide range of testing procedures used to determine and quantify hardenability of shallow-hardening, low-carbon, plain carbon, and low-alloy medium-carbon steels ranging from classical fracture and etching, Grossmann hardenability, and Jominy end-quench testing to manual and computerized computational methods. The article then uses this as a backdrop for the implementation of the core concepts of hardenability in a variety of predictive tools for calculating hardenability. The Caterpillar 1E0024 Hardenability Calculator, a personal computer-based program, calculates the Jominy curve based on the steel composition. The article also describes the method for boron and nonboron steels, with calculation examples for 8645 steel and 86B45 steel.
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006319
EISBN: 978-1-62708-179-5
... extreme conditions ( Ref 14 ). The hardenability of two ductile iron samples taken from the same melt was measured through Jominy end-quench tests. In one case, Jominy test samples were prepared from regularly solidified cast blocks, which were then austenitized and quenched following the Jominy test...
Abstract
The transformation of austenite of cast irons represents a more complex and less studied subject. This article discusses the general features of the decomposition of austenite into bainite. It describes the heat treatment cycles of austempered cast iron microstructure. The article reviews several factors, such as presence of graphite and austenite grain size, which affect the transformation rate of austenite during austempering of free-graphite cast irons.
Book Chapter
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005823
EISBN: 978-1-62708-165-8
... size at the moment of quenching. This article describes the Jominy end-quench test, the Grossman method, and the air hardenability test to evaluate hardenability. It also reviews the factors that influence steel hardenability and selection. hardenability hardenability limit hardness ideal...
Abstract
Hardenability refers to the ability of steel to obtain satisfactory hardening to some desired depth when cooled under prescribed conditions. It is governed almost entirely by the chemical composition (carbon and alloy content) at the austenitizing temperature and the austenite grain size at the moment of quenching. This article describes the Jominy end-quench test, the Grossman method, and the air hardenability test to evaluate hardenability. It also reviews the factors that influence steel hardenability and selection.
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Published: 01 August 2013
Fig. 5 Jominy end-quench hardenability test. (a) Standard end-quench test specimen and in a quenching jig. (b) Hardness plot and cooling rate as a function of distance from the quenched end
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in Hardenability Calculation of Carbon and Low-Alloy Steels with Low or Medium Carbon
> Steel Heat Treating Fundamentals and Processes
Published: 01 August 2013
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Published: 01 October 2014
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Published: 01 October 2014
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Published: 01 October 2014
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Published: 01 June 2016
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Published: 01 June 2016
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