1-14 of 14 Search Results for

Lehrer diagram

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Image
Published: 01 August 2013
Fig. 22 Lehrer diagram. (a) Weight percentage controls nitriding potential along the isoconcentration lines. (b) Phase controls the potentials parallel to the phase boundaries. Source: Ref 7 , 38 More
Image
Published: 01 October 2014
Fig. 22 Lehrer diagram for the formation of iron phase in ammonia-hydrogen mixtures. Source: Ref 7 More
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
... and nitrocarburizing of iron-base materials with gaseous processes. It describes nitriding potentials and the Lehrer diagram, carburizing potentials, controlled nitriding and nitrocarburizing, and the microstructural evolution of the compound layer and the diffusion zone. carburizing iron-nitrogen phase diagram...
Image
Published: 01 August 2013
of the figure. This (very high) equilibrium pressure actually must be read as a fugacity (see text following Eq 3 ) (taken from Ref 20 ). (b) Lehrer diagram of temperature vs. nitriding potential (cf. Eq 6 ). The ammonia content in an NH 3 -H 2 gas mixture at 1 atm total pressure corresponding with a given More
Image
Published: 01 August 2013
Fig. 5 Modified Lehrer iron-nitrogen diagram displaying the phase boundaries to γ′- and ε-nitrides as a function of temperature and nitriding potential ( K N ), dissociation, residual ammonia, and hydrogen for an ammonia and a dissociated ammonia atmosphere. Source: Ref 7 More
Image
Published: 31 December 2017
Fig. 1 Modified Lehrer iron-nitrogen diagram displaying the phase boundaries to gamma-prime (γ′) and epsilon (ε) nitrides as a function of temperature and nitriding potential ( K N ), dissociation, residual ammonia, and hydrogen for an ammonia and a dissociated ammonia atmosphere. p More
Image
Published: 01 August 2013
Fig. 28 Impact of measuring errors on phase boundaries in the iron-nitrogen Lehrer diagram, allowing for ±5 °C (±9 °F) and ±1% H 2 . Source: Ref 46 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
...% Cr) ∼600 >1000 Source: Ref 6 Thermodynamic Background The modified Lehrer iron-nitrogen diagram ( Fig. 5 ) shows the phase boundaries between ferrite (α), Fe 4 N γ′-nitrides, Fe 2–3 N ε-nitrides, and austenite (γ). Depending on the nitriding potential of the nitriding atmosphere...
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
... are also different. The very low solubility of nitrogen in ferrite in the temperature range of 0 to 591 °C (32 to 1095 °F), according to the Lehrer diagram ( Ref 1 – 3 ), leads to the formation of nitrides—mostly of Fe 4 N, known as γ'. Other alloying elements in steel form a wide range of nitrides...
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: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005958
EISBN: 978-1-62708-168-9
.... 22 Lehrer diagram for the formation of iron phase in ammonia-hydrogen mixtures. Source: Ref 7 Gas nitriding and nitrocarburizing is the most sensitive process regarding passivation effects typical for medium- to high-alloy tool steels. Therefore special attention must be paid to cleaning...
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
... carburizing case depth case hardening distortion microstructure nitriding quenching residual stress steel time-temperature-transformation diagram Development of Residual Stresses in Carburized Steels THE PROCESS OF CASE HARDENING includes three consecutive steps of heat treatment: the heating...
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
... or creates a compound layer of iron nitrides once the maximum solubility for nitrogen is exceeded. Fig. 1 Modified Lehrer iron-nitrogen diagram displaying the phase boundaries to gamma-prime (γ′) and epsilon (ε) nitrides as a function of temperature and nitriding potential ( K N ), dissociation...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.9781627081665
EISBN: 978-1-62708-166-5