High-Nitrogen Steel

Rashev, Ts.; Елисеев, А. В.; Zhekova, L. Ts.; Bogev, P. V.

doi:10.3103/s0967091219070106

Cited by 12 publications

(6 citation statements)

References 6 publications

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“…Researchers have confirmed that steel with fine grains has excellent strength, plasticity, and toughness. [ 11–18,28 ] The results of the tensile tests in the present study were consistent with those from the literatures, as indicated in Table 2 and Figure 2. The results showed that the plasticity of the HN steel was obviously better than that of the LN steel, and the LN steel generally broke earlier than the HN steel during local necking.…”

Section: Discussionsupporting

confidence: 91%

“…[5][6][7][8][9][10] Many researchers have confirmed that nitrogen can improve the mechanical properties of various steels. [11][12][13][14][15][16][17][18] Gu and Wang et al [11,15] reported that nitrogen could promote the precipitation of V(C, N) and (Ti, Nb)(C, N) and could refine the grains of Cr-Mo-V die steel and pipeline steel. Feng et al [16] concluded that the addition of nitrogen inhibited the formation of δ-ferrite and refined the prior austenite grains in high-nitrogen martensitic stainless steel.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Nitrogen on the Microstructure and Mechanical Properties of Fe–28Mn–10Al–0.8C Low‐Density Steel

Guo

Zhu

Zhao

et al. 2021

steel research int.

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Herein, the relationships among nitrogen content, inclusion characteristics, microstructure, and mechanical properties of low-density steel are investigated. The austenite grain size is refined with nitrogen addition to the low-density steel, and the ultimate tensile strength, plasticity, fracture toughness, and impact toughness are distinctly enhanced. However, the yield strength decreases due to a decrease in the ferrite content with nitrogen addition. AlN is determined to be the main inclusion in the high-nitrogen low-density steel, and the number percentage of AlN that is less than 2 μm reaches 84%, which promotes the refinement of austenite grains. In addition, aggregated AlN inclusions in the dimples of the steel are observed, which are generated during the smelting process, and the aggregated AlN inclusions tend to cause crack initiation in the low-density steel.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Effects of Nitrogen on the Microstructure and Mechanical Properties of Fe–28Mn–10Al–0.8C Low‐Density Steel

Guo

Zhu

Zhao

et al. 2021

steel research int.

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“…Nitrogen has attracted much attention due to certain beneficial effects resulting from its interaction with the present alloying elements in many steel grades. [ 25–27 ] Usually, in the production of steels with high N contents, the introduction of nitrogen is carried out by the addition of N‐containing ferroalloys.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Nonmetallic Inclusions in Different Ferroalloys used in the Steelmaking Processes

Wang

Karasev

Jönsson

2021

steel research int.

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Ferroalloys are one of the most important raw materials widely used in the steelmaking processes. Depending on the cleanliness of used ferroalloys, they can be an inevitable source of impurities and nonmetallic inclusions (NMIs) in steelmaking products. Herein, the inclusions in five different industrial ferroalloys (FeTi, FeMo, FeW, MnN, and FeCrN) are investigated. This is done using 2D investigations on polished cross sections of ferroalloy samples and using 3D investigations of NMIs on film filters and metal surfaces after electrolytic extraction (EE) using scanning electron microscopy in combination with energy‐dispersive spectroscopy (SEM‐EDS). Moreover, the characteristics of the main types of inclusions presented on film filters and metal surfaces after EE are compared and their possible transformations in Al‐killed steel are evaluated. The results show that the main inclusions are more likely the oxidization products of the reductant and some unreduced ore during the ferroalloy production process. The 3D investigations of inclusions on metal surfaces after extraction are found to be very useful in detection and evaluation of larger‐sized inclusions. Overall, this study helps to better understand the impurities in different ferroalloys and their possible effect on the steel cleanliness.

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“…Under normal pressure, the solubility of nitrogen in liquid iron is very low, which limits the production of high nitrogen steel. Therefore, the current production of high nitrogen steel mainly adopts pressure smelting method [5,6], or by adding a certain amount of Cr/Mn element, in order to improve the solubility of N element [7]. Adding nitrogen to stainless steel can reduce the digestion of Ni, and can improve the corrosion resistance of stainless steel, especially in the three corrosion conditions of pitting, knife-line corrosion and intergranular corrosion in chloride ion environment.…”

Section: Introductionmentioning

confidence: 99%

Effect of N on corrosion resistance of Fe-Cr-Ni-Mo-Mn alloy

Liu

Wang

Guo

et al. 2021

Mater. Res. Express

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In order to develop the Fe-Cr-Ni-Mo-Mn-N corrosion resistant alloys, analyze the influence of nitrogen on the corrosion resistance of Fe-Cr-Ni-Mo-Mn alloy, adjust the N content in the alloy system, and Flux cored wires with different N content were prepared. They were surfaced on low carbon steel by MIG welding. The phase composition, microstructure and corrosion resistance of the cladding metal were analyzed to studied the effect of N content on the structure and performance of the surfacing metal. The results show that the addition of nitrogen does not change the matrix structure (which is Fe-Ni-Cr austenite), but with the increase of nitrogen content, the precipitation of nitrides （ Cr2(C,N) and BN ） is

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High-Nitrogen Steel

Cited by 12 publications

References 6 publications

Effects of Nitrogen on the Microstructure and Mechanical Properties of Fe–28Mn–10Al–0.8C Low‐Density Steel

Effects of Nitrogen on the Microstructure and Mechanical Properties of Fe–28Mn–10Al–0.8C Low‐Density Steel

Characterization of Nonmetallic Inclusions in Different Ferroalloys used in the Steelmaking Processes

Effect of N on corrosion resistance of Fe-Cr-Ni-Mo-Mn alloy

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