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direct-quenched carburized steel

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Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002400
EISBN: 978-1-62708-193-1
... bending fatigue crack initiation and unstable crack propagation of direct-quenched carburized steels. alloying austenitic grain size bending fatigue carburized steel crack initiation cyclic mechanical loading direct-quenched carburized steel intergranular fracture microstructure residual...
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Published: 01 January 1996
Fig. 1 Typical near-surface case microstructure of direct-quenched carburized steel. Martensite plates etch dark and retained austenite appears white. Gas-carburized AISI 8719 steel (1.06% Mn, 0.52% Cr, 0.5% Ni, 0.17% Mo). Light micrograph, nital etch More
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Published: 01 August 2013
Fig. 6 Jominy hardenability of carburized 16MnCr5 German steel. (a) Direct quench. All bars normalized at 925 °C (1700 °F). Core: austenitized 20 min at 920 °C (1690 °F). Case: pack carburized 9 h at 920 °C (1690 °F), direct quench. (b) All bars normalized at 925 °C (1700 °F). Core More
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Published: 01 January 1996
Fig. 17 S-N curves for direct-quenched gas-carburized 4615 and 8620 steels, notched 4-point bend specimens. Non-martensitic transformation products were present on the surfaces of the 8620 steel specimens and absent on the 4615 steel specimens. Source: Ref 57 More
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001024
EISBN: 978-1-62708-161-0
... steels. The selection of a carburizing steel for a specific bearing section is based on the heat-treating practice of the producer, either direct quenching from carburizing or reheating for quenching, and on the characteristics of the quenching equipment. carburizing bearing steels heat treatment...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005952
EISBN: 978-1-62708-168-9
... hardenability. This is still generally true when the steels are direct quenched from carburizing, so that the carbon and alloying elements are in solution in the case austenite. In parts that are reheated for hardening and in heavy-sectioned parts, however, both case and core hardenability requirements should...
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Published: 01 December 2004
°F) for 2 h, cooled slowly to room temperature, single quenched from 940 °C (1725 °F), cooled to −183 °C (−300 °F), and tempered at 150 °C (300 °F). 1% nital etch. (c) Gas carburized at 900 °C (1650 °F) and direct quenched in oil. Bisulfite etch. (d) Gas carburized at 900 °C (1650 °F), direct More
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Published: 01 August 2013
Fig. 4 Jominy hardenability of carburized 8620 steel. (a) Reheat quench. All bars normalized at 925 °C (1700 °F). Core: austenitized 20 min at 845 °C (1550 °F). Case: pack carburized 9 h at 925 °C (1700 °F), box cool; reheated 20 min at 845 °C (1550 °F), quenched. (b) Direct quench. All bars More
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005801
EISBN: 978-1-62708-165-8
... to predict hardenability from composition for homogeneous high-carbon steels as well as the case hardenability of high-carbon regions in carburizing grades. Case hardenability can be calculated for both the single-quench practice, wherein the steel is hardened by direct or delay quenching from carburizing...
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Published: 01 January 2002
Fig. 77 Direct quenching from carburizing temperature. (a) Phase diagram schematic. (b) Continuous cooling transformation curve for a high-carbon surface. (c) Micrograph of direct quenched 3% Ni-Cr carburized steel. 280×. Source: Ref 30 More
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Published: 30 September 2014
Fig. 114 Direct quenching from carburizing temperature. (a) Phase diagram schematic. (b) Continuous cooling transformation curve for a high-carbon surface. (c) Micrograph of direct quenched 3% Ni-Cr carburized steel. 280×. Source: Ref 43 More
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005799
EISBN: 978-1-62708-165-8
... , carburizing reaction in Eq 3 , was determined to proceed approximately 31 times faster than carburization by direct CO decomposition and 59 times faster than carburizing by direct CH 4 decomposition at the steel surface. Decarburization by H 2 O is approximately 16 times faster than it is by CO 2 . The data...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005956
EISBN: 978-1-62708-166-5
... with subsequent high-pressure gas quenching. In Fig. 8 , the average relative change of height related to the carburizing depth of the carburized discs is shown. It can be seen that there is a direct linear relation between the carburizing depth and the relative change of height ( Fig. 8a ). Furthermore...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005996
EISBN: 978-1-62708-168-9
... or when facilities for quenching form the carburizing cycle are not available. Distortion is at least equal to that obtained by a single quench from the carburizing cycle, as described in note (e). Direct hardening of carbon steels. Temper to desired hardness Table 6 Direct hardening of carbon...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003762
EISBN: 978-1-62708-177-1
... is then hardened, either by direct quenching (from the austenitizing temperature during carburization) or by reheating and quenching. Generally, lean grades of steel are direct quenched, while more-alloy grades are reheat quenched. The amount and morphology of martensite in the case depends on the carbon content...
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Published: 01 October 2014
Fig. 21 End-quench hardenability of carburized 4118 steel. Bars normalized at 925 °C (1700 °F). Core was austenitized for 20 min at 925 °C (1700 °F). Case was pack carburized for 9 h at 925 °C (1700 °F) and direct quenched. Source: Ref 8 More
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Published: 01 October 2014
Fig. 15 End-quench hardenability of carburized (a) 4028 and (b) 4427 steels. Bars normalized at 925 °C (1700 °F). Core was austenitized for 20 min at 925 °C (1700 °F). Case was pack carburized for 9 h at 925 °C (1700 °F) and direct quenched. Source: Ref 8 More
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Published: 01 October 2014
Fig. 27 End-quench hardenability of carburized (a) 8617 and (b) 8822 steels. Bars normalized at 925 °C (1700 °F). Core was austenitized for 20 min at 925 °C (1700 °F). Case was pack carburized for 9 h at 925 °C (1700 °F) and direct quenched. Source: Ref 8 More
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Published: 01 October 2014
) and direct quenched. Source: Ref 8 More
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Published: 01 August 2013
Fig. 32 Effect of tempering on residual stress in carburized steel. Bars of 8617 steel, 19 mm (0.75 in.) in diameter, were carburized, direct oil quenched, and tempered for 1 h at the indicated temperature. More