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ferritic nitrocarburizing

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Published: 01 August 2013
Fig. 3 Nitrocarburized steel surfaces. (a) Ferritic nitrocarburizing at 570 °C (1060 °F), where gen is the predominant element in the compound layer of epsilon (ε) carbonitride. (b) Low-temperature austenitic nitrocarburizing at 700 °C (1290 °F), with a martensitic or bainitic microstructure More
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Published: 01 January 1994
Fig. 4 Typical microstructure in a sintered ferritic nitrocarburized iron-copper-carbon P/M steel. 100×. Source: Ref 5 More
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005806
EISBN: 978-1-62708-165-8
... Abstract This article summarizes the terminology for gas reactions, and discusses low-temperature nitriding and nitrocarburizing of stainless steels. It describes the various nitriding processes, namely, high- and low-pressure nitriding, oxynitriding, sulfonitriding, oxysulfonitriding, ferritic...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005771
EISBN: 978-1-62708-165-8
..., nitriding, carbonitriding, and austenitic and ferritic nitrocarburizing, as well as selective-hardening methods, such as laser transformation hardening, electron beam hardening, ion implantation, selective carburizing, and surface hardening with arc lamps. The article also discusses the factors affecting...
Series: 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...
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Published: 01 August 2013
Fig. 8 Hardness profiles. (a) Typical hardness profiles on commercially treated steels. FNC, ferritic nitrocarburizing. (b) Hardness profiles achieved on various steels after nitriding at 530 °C (985 °F) for 5 h. Profiles grow steeper with increasing amount of strong nitride formers. Courtesy More
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006355
EISBN: 978-1-62708-192-4
... to 650 °C (660 to 1200 °F). Classic nitriding typically aims for a diffusion zone of high hardness with only a limited compound layer. The process temperature during gas nitriding typically ranges between 495 and 565 °C (925 and 1050 °F). Ferritic nitrocarburizing typically is carried out at slightly...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005818
EISBN: 978-1-62708-165-8
... to be suppressed if NH 3 is added to the carburizing gas mixture, that is, nitrocarburizing ( Ref 26 , 27 ). Moreover it is shown in Ref 26 and 27 that appropriate choice of the gas composition in CO-H 2 -N 2 -NH 3 gas mixtures allows the growth of massive cementite layers on ferrite (α-Fe). 7. Controlled...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005986
EISBN: 978-1-62708-168-9
... as Tufftride) is based on a salt mixture of alkali- cyanides, cyanates, and carbonates ( Ref 33 , 34 , 35 ). The widespread industrial application of ferritic nitrocarburizing was probably motivated by the numerous advatages of the salt bath treatment, including short cycle time, easy process control...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005762
EISBN: 978-1-62708-165-8
... at the surface. In contrast, nitrocarburizing involves higher levels of nitrogen with a compound layer ( Fig. 3 ). There are two types of nitrocarburizing: ferritic and austenitic. Ferritic nitrocarburizing occurs at lower temperatures in the ferritic temperature range and involves diffusion of nitrogen...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005977
EISBN: 978-1-62708-168-9
..., ferritic, austenitic, duplex (ferritic-austenitic), and precipitation-hardening stainless steels. It presents a checklist of characteristics to be considered in selecting the proper type of stainless steel for a specific application. The article also outlines the need to promote the formation...
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
... Liquid (cyaniding) 760–870 (1400–1600) 2.5–125 μm (0.1–5 mils) 50–65 Low-carbon steels Good for thin cases on noncritical parts, batch process, salt disposal problems Ferritic nitrocarburizing 565–675 (1050–1250) 2.5–25 μm (0.1–1 mil) 40–60 Low-carbon steels Low-distortion process for thin...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005791
EISBN: 978-1-62708-165-8
... studies, and applications of nitrocarburizing of steel. glow-discharge process microstructure nitrocarburizing plasma nitriding plasma nitrocarburizing process control steel Introduction Plasma nitriding (also known as ion nitriding, plasma ion nitriding, or glow-discharge nitriding...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005959
EISBN: 978-1-62708-168-9
... by a discussion on physical metallurgy, including crystallographic identity, thermal stability and decomposition, nitrogen and carbon solubility in expanded austenite, and diffusion kinetics of interstitials. It provides a description of low-temperature nitriding and nitrocarburizing processes for primarily...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.9781627081658
EISBN: 978-1-62708-165-8
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005927
EISBN: 978-1-62708-166-5
... requirements, and the purity of the atmosphere is equivalent to that of the gas supply. This makes it possible to change charges in several minutes and easily change from one process system to another (e.g., from nitriding to ferritic nitrocarburizing, or from carburizing to carbonitriding). The furnace...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005929
EISBN: 978-1-62708-166-5
... liquid nitriding and salt bath nitriding were applied. Today (2013), although these terms are still in use, the generic term ferritic nitrocarburizing is considered the technically correct classification, which also includes gaseous and plasma methods. Commercially, trade names such as Tufftride...
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
... to the local volume change during transformation from a ferrite-cementite phase mixture to austenite. Additionally, residual stresses introduced during the machining of the samples must be taken into account ( Ref 1 ). During heating to a temperature below Ac 1 without any transformation occurring...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005870
EISBN: 978-1-62708-167-2
... the liquid-to-solid transformation, albeit of a smaller amount. The change (increase) in volume occurs due to the difference in mass densities of the parent phase (e.g., austenite) and the decomposed phases (pearlite, ferrite, bainite, and martensite). The internal stresses may produce the following effects...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005536
EISBN: 978-1-62708-197-9
... Evolution of the experimental and calculated carbon profiles of three samples of the Fe-13Cr-5Co-3Ni-2Mo-0.07C grade, carburized in the same conditions during 23, 53, and 145 min at 955 °C (1750 °F). Source: Ref 19 Gas Nitriding and Nitrocarburizing Nitriding and nitrocarburizing...