Microstructure and phase composition of high-nitrogen steel fabricated by electron beam additive manufacturing

2020 ◽  
Author(s):  
Kseniya A. Reunova ◽  
Elena G. Astafurova ◽  
Sergey V. Astafurov ◽  
Evgenii V. Melnikov ◽  
Marina Yu. Panchenko ◽  
...  
Keyword(s):  
Electron Beam ◽  
Phase Composition ◽  
Additive Manufacturing ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Nitrogen Steel

Peculiarities of tensile deformation and fracture of high-nitrogen steel obtained by electron beam additive manufacturing

2020 ◽  
Author(s):  
Sergey V. Astafurov ◽  
Elena G. Astafurova ◽  
Kseniya A. Reunova ◽  
Evgenii V. Melnikov ◽  
Marina Yu. Panchenko ◽  
...  
Keyword(s):  
Electron Beam ◽  
Additive Manufacturing ◽  
Tensile Deformation ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Deformation And Fracture ◽  
Nitrogen Steel

Microstructure and phase composition of vanadium-alloyed high-nitrogen steel fabricated by additive manufacturing

2020 ◽  
Author(s):  
Kseniya A. Reunova ◽  
Elena G. Astafurova ◽  
Sergey V. Astafurov ◽  
Evgenii V. Melnikov ◽  
Marina Yu. Panchenko ◽  
...  
Keyword(s):  
Phase Composition ◽  
Additive Manufacturing ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Nitrogen Steel

Microstructure/mechanical properties relationship in high-nitrogen steel obtained by electron beam additive manufacturing and conventional casting

2020 ◽  
Author(s):  
Kseniya A. Reunova ◽  
Elena G. Astafurova ◽  
Sergey V. Astafurov ◽  
Evgenii V. Melnikov ◽  
Marina Yu. Panchenko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Additive Manufacturing ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Conventional Casting ◽  
Nitrogen Steel

Electron-beam additive manufacturing of high-nitrogen steel: Microstructure and tensile properties

2021 ◽  
Vol 826 ◽  
pp. 141951
Author(s):  
Sergey Astafurov ◽  
Elena Astafurova ◽  
Kseniya Reunova ◽  
Evgenii Melnikov ◽  
Marina Panchenko ◽  
...  
Keyword(s):  
Electron Beam ◽  
Additive Manufacturing ◽  
Tensile Properties ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Steel Microstructure ◽  
Nitrogen Steel

The effect of phase transformations in the process of electrom-beam 3D-printing and post-built heat treatment on the peculiarities of plastic deformation and fracture of high nitrogen Cr-Mn steel

2021 ◽  
pp. 10-17
Author(s):  
E.G. Astafurova ◽  
◽  
K.A. Reunova ◽  
S.V. Astafurov ◽  
M.Yu. Panchenko ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Plastic Deformation ◽  
Electron Beam ◽  
Phase Composition ◽  
Additive Manufacturing ◽  
3D Printing ◽  
Raw Material ◽  
High Nitrogen ◽  
Two Phase ◽  
Deformation And Fracture

We investigated the phase composition, plastic deformation and fracture micromechanisms of Fe-(25-26)Cr-(5-12)Mn-0.15C-0.55N (wt. %) high-nitrogen chromium-manganese steel. Obtained by the method of electron-beam 3D-printing (additive manufacturing) and subjected to a heat treatment (at a temperature of 1150°C following by quenching). To establish the effect of the electron-beam 3D-printing process on the phase composition, microstructure and mechanical properties of high-nitrogen steel, a comparison was made with the data for Fe-21Cr-22Mn-0.15C-0.53N austenitic steel (wt. %) obtained by traditional methods (casting and heat treatment) and used as a raw material for additive manufacturing. It was experimentally established that in the specimens obtained by additive manufacturing method, depletion of the steel composition by manganese in the electron-beam 3D-printing and post-built heat treatment contributes to the formation of a macroscopically and microscopically inhomogeneous two-phase structure. In the steel specimens, macroscopic regions of irregular shape with large ferrite grains or a two-phase austenite-ferrite structure (microscopic inhomogeneity) were observed. Despite the change in the concentration of the basic elements (chromium and manganese) in additive manufacturing, a high concentration of interstitial atoms (nitrogen and carbon) remains in steel. This contributes to the macroscopically heterogeneous distribution of interstitial atoms in the specimens - the formation of a supersaturated interstitial solid solution in the austenitic regions due to the low solubility of nitrogen and carbon in the ferrite regions. This inhomogeneous heterophase (ferrite-austenite) structure has high strength properties, good ductility and work hardening, which are close to those of the specimens of the initial high-nitrogen austenitic steel used as the raw material for additive manufacturing.

scholarly journals Dynamic Mechanical Properties of High Nitrogen Steel under Combined Loading

2021 ◽  
Vol 1855 (1) ◽  
pp. 012009
Author(s):  
Zizhen Yang ◽  
Cheng Miao ◽  
Hailing Wu ◽  
Tao Zhong ◽  
Lihong Bai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dynamic Mechanical Properties ◽  
Combined Loading ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Dynamic Mechanical ◽  
Nitrogen Steel

Research of Flow Simulation with High-Pressure and Bottom-Blowing Nitrogen

2013 ◽  
Vol 634-638 ◽  
pp. 3110-3113
Author(s):  
Shu Huan Wang ◽  
He Jun Zhang ◽  
Ding Guo Zhao
Keyword(s):  
High Pressure ◽  
Flow Field ◽  
Molten Steel ◽  
Gas Content ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Nitrogen Steel ◽  
Bottom Blowing ◽  
Steel Flow ◽  
Pressure Factor

According to the actual situation of refining high nitrogen steel with the laboratory high pressure reaction axe, the molten steel flow field in the high-pressure and bottom-blowing nitrogen reactor was simulated by using the software Fluent. The rules of the influence of pressure factor on the molten steel flow field characteristics, turbulent kinetic energy and gas content were explored. According to the characteristics of the flow field and gas-liquid two phase structure, the rules of the influence of pressure factor on nitrogen concentration distribution were analyzed. So some useful theoretical basis and guidance were provided for laboratory refining high nitrogen steel and industrial production in the future.

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