High Nitrogen Steels

Gavriljuk, V.G.; Berns, Hans

doi:10.1007/978-3-662-03760-7

Cited by 385 publications

(155 citation statements)

References 185 publications

Supporting

Mentioning

110

Contrasting

Unclassified

Order By: Relevance

“…However, low-temperature treatments implicate in long processing times and small layers. Another possibility to the hardening of these steels is the High-Temperature Gas Nitriding (HTGN), in which nitrogen diffuses into austenite [7][8]. Solid solution nitrogen-enriched surfaces can also be achieved by Solution Heat Treatment after Plasma Nitriding (SHTPN).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen enrichment of AISI 409 stainless steel by solution heat treatment after plasma nitriding

Berton¹,

Neves²,

Mafra³

et al. 2017

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Nitrogen enrichment of AISI 409 stainless steel by solution heat treatment after plasma nitriding

Berton¹,

Neves²,

Mafra³

et al. 2017

View full text Add to dashboard Cite

show abstract

“…In recent years, the development of nitrogen steel metallurgy is due to strong austenite forming nitrogen property [1]. Nitrogen alloyed steels are divided into the following two categories: steels with a subequilib rium nitrogen content (these steels are produced by melting and solidification at atmospheric pressure) and steels with an overequilibrium nitrogen content (they are produced at a higher nitrogen pressure).…”

Section: Introductionmentioning

confidence: 99%

“…High nitrogen steels are promising due to an unique combination of their high strength, ductility, corrosion resistance, and other properties. It was shown, using binary Fe-N solid solutions as an example [1], that the short range order induced by nitrogen is the cause of their high thermodynamic stability, which is observed in multicomponent austenite steels based on this system [2] and is reflected in the equilibrium phase diagrams of various alloying systems with nitrogen [3,4]. In practice, it makes it possible to obtain auste nite in the Fe-Cr-N system and more complex sys tems as a result of quenching from high temperatures at higher chromium content than that in the Fe-Cr-Ni system and to develop nonmagnetic materials with a high corrosion resistance and strength at room and higher temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, we performed CPD of the quenched steel (in what follows, IT + CPD regimes) with the true strain e = 0.2, 0.4, and 0.8 and CPD of the quenched steel with subsequent aging at 500 and 800°C (IT + CPD + Aging regimes). 1 Static tests of the mechanical properties and SCC tests were performed by the scheme of concentrated bending on an universal TiniusOlsenH50K S machine; in the tests, we used prismatic 10 × 10 × 55 mm speci 1 The true degree of deformation was estimated by formula e i = ln(F 0 /F i ), where F 0 and F i are the initial (before deformation) and final (after appropriate degree of deformation) cross sec tional areas of the sample.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of deformation on the structure and mechanical and corrosion properties of high-nitrogen austenitic 07Kh16AG13M3 steel

et al. 2013

View full text Add to dashboard Cite

Abstract-The correlation has been studied between the structure of a high nitrogen austenitic Cr-Mn-N steel formed in the process of combined hardening treatment, including cold plastic deformation (CPD), and its mechanical and corrosion properties. The structure and properties of commercial high nitrogen (0.8% N) 07Kh16AG13M3 steel is analyzed after rolling by CPD and aging at 500 and 800°C. It is shown that CPD of the steel occurs by dislocation slip and deformation twinning. Deformation twinning and also high resistance of austenite to martensitic transformations at true strains of 0.2 and 0.4 determine the high plasticity of the steel. The contribution of the structure imperfection parameters to the broadening of the austenite lines dur ing CPD is estimated by X ray diffraction. The main hardening factor is stated to be lattice microdistortions. Transmission electron microscopy study shows that heating of the deformed steel to 500°C leads to the for mation of the intermediate CrN phase by a homogeneous mechanism, and the intermtallic χ phase forms along the austenite grain boundaries in the case of heating at 800°C. After hardening by all investigated tech nological schemes, exception for aging at 800°C, the steel does not undergo pitting corrosion and is slightly prone to a stress corrosion cracking during static bending tests, while aging at 800°C causes pitting corrosion at a pitting formation potential E pf = -0.25 V.

show abstract

“…Para os aços inoxidáveis a grande maioria dos efeitos benéficos do nitrogênio está associada à sua presença em solução sólida [8]. Desta forma a utilização da nitretação por plasma fica restrita ao uso desse processo a baixa temperatura, no qual ocorre somente a formação da fase N [1,9,10].…”

Section: Introductionunclassified

Nitretação por plasma do aço ISO 5832-1 em alta temperatura: Influência do tempo de tratamento e sua aplicação no processo "SHTPN"

2013

View full text Add to dashboard Cite

RESUMOCorpos de prova de aço inoxidável ISSO 5832-1 foram nitretados em uma atmosfera de 90% vol. N2 + 10% vol. H2, a uma temperatura de 870ºC. Os tempos de processamento estudados foram 1, 3 e 5 h. Utilizaram-se as seguintes técnicas de análise: difração de raios-x (DRX), microscopia eletrônica de varredura (MEV) e microdureza Vickers, além da análise da variação de massa. Os resultados indicaram um crescimento difusivo da camada composta. O aumento do tempo promoveu uma maior incorporação de nitrogênio no material, porém, devido à maior difusão em volume e a consequente formação de camadas mais espessas, fases mais pobres nesse elemento foram identificadas. Verificou-se, ainda, uma diminuição da dureza da camada nitretada com o aumento do tempo de tratamento. O ganho de massa, bem como o crescimento da camada nitretada, foi crescente com o tempo de tratamento. Dentre os tempos estudados, o que mais se adequou ao posterior tratamento de "SHTPN" foi o de 3h, principalmente devido ao tamanho de grão, associado à incorporação de nitrogênio obtida. Palavras-chave:Nitretação por plasma, aços inoxidáveis, ISO 5832-1, SHTPN. ABSTRACTSamples of stainless steel ISO 5832-1 were nitrided in a gas mixture of 90% N2 + 10% H2 at a temperature of 870ºC. The treatment times were 1, 3 and 5 hours. Treated samples were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and Vickers microhardness, as well as analyze of the mass variation. The results indicated the diffusion growth of the compound layer. The increased time promoted a greater uptake of nitrogen in the material, however, due to higher bulk diffusion and the consequent formation of thicker layers, phases poor in this element were identified. There was also a decrease in hardness of the nitrided layer with increasing treatment time. The gain in mass, as well as growth of the nitrided layer, increased with treatment time. For the subsequent SHTPN treatment the nitriding time of 3 h was the most suitable, mainly due to grain size, associated with the obtained nitrogen incorporation.

show abstract

High Nitrogen Steels

Cited by 385 publications

References 185 publications

Nitrogen enrichment of AISI 409 stainless steel by solution heat treatment after plasma nitriding

Nitrogen enrichment of AISI 409 stainless steel by solution heat treatment after plasma nitriding

Influence of deformation on the structure and mechanical and corrosion properties of high-nitrogen austenitic 07Kh16AG13M3 steel

Nitretação por plasma do aço ISO 5832-1 em alta temperatura: Influência do tempo de tratamento e sua aplicação no processo "SHTPN"

Contact Info

Product

Resources

About