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Published: 01 August 2013
Fig. 24 Nitriding depth (extent of the diffusion zone), z , as a function of the square root of the nitriding potential, r N 1/2 , for Fe-7wt%Cr alloy specimens nitrided at 580 °C (853 K) for 4 h. Source: Ref 100
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Effects of time and nitriding temperature on nitrided depth for 32CrMoV13. ...
Available to PurchasePublished: 01 October 2014
Fig. 40 Effects of time and nitriding temperature on nitrided depth for 32CrMoV13. Source: Ref 48
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Image
Comparison of case depth vs. process time for ion and gas nitriding of 4140...
Available to Purchase
in Plasma (Ion) Nitriding and Nitrocarburizing of Steels
> Steel Heat Treating Fundamentals and Processes
Published: 01 August 2013
Fig. 13 Comparison of case depth vs. process time for ion and gas nitriding of 4140 steel. Source: Ref 18
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Image
Case depth vs. square root of ion nitriding time for Nitralloy 135M and 414...
Available to Purchase
in Plasma (Ion) Nitriding and Nitrocarburizing of Steels
> Steel Heat Treating Fundamentals and Processes
Published: 01 August 2013
Fig. 14 Case depth vs. square root of ion nitriding time for Nitralloy 135M and 4140 steel. Source: Ref 18
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Image
Hardness-depth profiles after nitriding (solid lines) and nitrocarburizing ...
Available to PurchasePublished: 01 October 2014
Fig. 17 Hardness-depth profiles after nitriding (solid lines) and nitrocarburizing (dash-dot lines) for 16 h of 100 μm strip 7C27Mo2 (molybdenum-modified AISI 420) at the temperatures indicated. Hardness profiles were fitted assuming a sigmoidal function. Source: Ref 86
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Image
Distribution of wheel temperatures in full wheel grinding of silicon nitrid...
Available to PurchasePublished: 01 January 1994
Fig. 3 Distribution of wheel temperatures in full wheel grinding of silicon nitride. Depth of cut, 12.5 μm; table velocity, 23.4 mm/s; wheel velocity, 32 m/s; 220-grit
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Crater depth vs. number of impacts for GS-44 silicon nitride counterfaces o...
Available to PurchasePublished: 01 January 2002
Fig. 17 Crater depth vs. number of impacts for GS-44 silicon nitride counterfaces of varying surface finish impacted with a NBD-200 silicon nitride ball. Source: Ref 33
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Published: 01 August 2013
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Linear wear depth vs. time of friction at different unit loads of nitrided ...
Available to PurchasePublished: 31 December 2017
Fig. 19 Linear wear depth vs. time of friction at different unit loads of nitrided layer produced in in 18HGT (0.18 wt% C, 0.25 wt% Si, 1.15 wt% Cr, 0.1 wt% Ti) steel by controlled gas nitriding at 530 °C (985 °F) for 6 h. Linear wear at 50 to 200 MPa (7 to 29 ksi) was 5.8 to 11.6 µm, and wear
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Image
Linear wear depth vs. time of friction at different unit loads of nitrided ...
Available to PurchasePublished: 31 December 2017
Fig. 20 Linear wear depth vs. time of friction at different unit loads of nitrided layer produced in 4140 steel by controlled gas nitriding at 530 °C (985 °F) for 6 h. Linear wear at 50 to 200 MPa (7 to 29 ksi) was 4.7 to 12.8 µm, and wear intensity was 0.002 to 0.003.8 µm/min. Source: Ref 32
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Linear wear depth vs. time of friction at different unit loads of nitrided ...
Available to PurchasePublished: 31 December 2017
Fig. 21 Linear wear depth vs. time of friction at different unit loads of nitrided layer produced in 321 stainless steel. Linear wear at 50 to 200 MPa (7 to 29 ksi) was 5 to 8 µm, and wear intensity was 0.005 to 0.0063 µm/min. S = seizure. Source: Ref 33
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Hardness gradients and case depth relations for single-stage nitrided alumi...
Available to PurchasePublished: 01 December 1998
Fig. 15 Hardness gradients and case depth relations for single-stage nitrided aluminum-containing SAE 7140 steel
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Nitrogen concentration-depth profiles of nitrided Fe-7wt%Cr alloy and Fe-20...
Available to PurchasePublished: 01 August 2013
Fig. 25 Nitrogen concentration-depth profiles of nitrided Fe-7wt%Cr alloy and Fe-20wt%Cr alloy specimens nitrided for 7 and 15 h, respectively, at 580 °C (853 K) with r N = 0.1 atm −1/2 . The experimental data (points in the figure) were obtained by electron probe microanalysis. The full
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Nitrogen concentration-depth profiles of nitrided Fe-2wt%V alloy specimens ...
Available to PurchasePublished: 01 August 2013
Fig. 27 Nitrogen concentration-depth profiles of nitrided Fe-2wt%V alloy specimens nitrided at r N = 0.103 atm −1/2 . The experimental data (points in the figure) were obtained by electron probe microanalysis. The full lines through the data are the results of fits of the model described
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Development of case depth for various steels, nitrided at 530 °C (985 °F), ...
Available to Purchase
in Gas Nitriding and Gas Nitrocarburizing of Steels
> Steel Heat Treating Fundamentals and Processes
Published: 01 August 2013
Fig. 9 Development of case depth for various steels, nitrided at 530 °C (985 °F), as a function of time
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Image
Crater depth versus number of impacts for GS-44 silicon nitride counterface...
Available to PurchasePublished: 15 January 2021
Fig. 19 Crater depth versus number of impacts for GS-44 silicon nitride counterfaces of varying surface finish impacted with a NBD-200 silicon nitride ball. Source: Ref 45
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Image
Composition-depth profiles of nitrided stainless steel AISI 316 as determin...
Available to PurchasePublished: 01 October 2014
Fig. 9 Composition-depth profiles of nitrided stainless steel AISI 316 as determined with glow discharge optical emission spectrometry (GDOES). (See also Fig. 7 and Fig. 10 .) Source: Ref 82
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Hardness-depth profiles of nitrided AISI 316. The corresponding micrographs...
Available to PurchasePublished: 01 October 2014
Fig. 10 Hardness-depth profiles of nitrided AISI 316. The corresponding micrographs and composition profiles (determined with glow discharge optical emission spectrometry, GDOES) are shown in Fig. 5 and Fig. 7 , respectively. A profile for carburizing is shown for comparison. Lines
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Book Chapter
Tribology of Nitrided and Nitrocarburized Steels
Available to PurchaseSeries: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006355
EISBN: 978-1-62708-192-4
... by carburizing and nitriding Process Nature of case Process temperature Typical case depth Case hardness, HRC equivalent Typical base metals Process characteristics °C °F Carburizing Pack Diffused carbon 815–1090 1500–2000 125 μm–1.5 mm (5–60 mils) 50–63 Low-carbon steels, low...
Abstract
The surface of irons and steels can be hardened by introducing nitrogen (nitriding), nitrogen and carbon (nitrocarburizing), or nitrogen and sulfur (sulfonitriding) into the surface. This article lists the principal reasons for nitriding and nitrocarburizing, and summarizes the typical characteristics of nitriding processes along with a general comparison of carburizing processes in a table. It describes the two most common nitriding methods: gas nitriding and ion (plasma) nitriding. The article discusses the wear behavior of nitrided layers and the wear resistance of selected steels. Rolling-contact fatigue (RCF) occurs in rolling contacts such as bearings, rolls, and gears. The article provides a discussion on rolling-contact fatigue of nitrided steels for aerospace bearing components.
Book Chapter
Case Hardening of Steel
Available to PurchaseSeries: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003197
EISBN: 978-1-62708-199-3
..., carbon and hardness gradients, and process procedures of different types of case hardening methods: carburizing (gas, pack, liquid, vacuum, and plasma), nitriding (gas, liquid, plasma), carbonitriding, cyaniding and ferritic nitrocarburizing. An accurate and repeatable method of measuring case depth...
Abstract
Case hardening is defined as a process by which a ferrous material is hardened in such a manner that the surface layer, known as the case, becomes substantially harder than the remaining material, known as the core. This article discusses the equipment required, process variables, carbon and hardness gradients, and process procedures of different types of case hardening methods: carburizing (gas, pack, liquid, vacuum, and plasma), nitriding (gas, liquid, plasma), carbonitriding, cyaniding and ferritic nitrocarburizing. An accurate and repeatable method of measuring case depth is essential for quality control of the case hardening process and for evaluation of workpieces for conformance with specifications. The article also discusses various case depth measurement methods, including chemical, mechanical, visual, and nondestructive methods.
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