Temat: M7C3 - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Carbides Analysis of the High Strength and Low Density Fe-Mn-Al-Si Steel
Autorzy:: Sozańska-Jędrasik, L.
Mazurkiewicz, J.
Borek, W.
Matus, K.
Tematy:: high manganese steels
triplex
microstructure
isolates of carbide
carbides κ
M7C3
EBSD; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/351736.pdf Link otwiera się w nowym oknie
Opis:: The work presents the results of investigations into the structure and phase composition of newly developed high manganese steels of the X98MnAlSiNbTi24-11 and X105MnAlSi24-11 type. The average density of such steels is 6.67 g/cm³, which is 15% lower as compared to typical structural steels. An analysis of phase composition and structure allows to conclude that the investigated steels feature an austenitic γ-Fe(Mn,Al,C) structure with uniformly distributed and elongated α-Fe(Mn,Al) ferrite grains on the boundaries of austenite grains and carbides. Examinations by diffraction of back scattered electrons (EBSD) allow to conclude that high-angle boundaries dominate in such steels, having significant influence on mechanical properties. Three types of carbides with differentiated chemical composition and size were identified in steel X98MnAlSiNbTi24-11 with scanning and transmission electron microscopy. κ-(Fe,Mn)₃AlC carbides, having a regular, face-centered cubic lattice (fcc), were identified in austenite. Transmission electron microscopy examinations have enabled to identify M₇C₃-type carbide in ferrite. Nb- and Ti-based complex carbides were identified in steel X98MnAlSiNbTi24-11, both, in ferrite and austenite. (NbTi)C₂ carbide precipitates were confirmed in an X-ray qualitative phase analysis. The size of the above-mentioned carbides is within several to several dozens of μm. An X-ray qualitative phase analysis has confirmed the precipitates of M₇C₃ carbides in both steels.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of Nb and Ti micro-additives and thermo-mechanical treatment of high-manganese steels with aluminium and silicon on their microstructure and mechanical properties
Autorzy:: Sozańska-Jędrasik, L.
Mazurkiewicz, J.
Borek, W.
Matus, K.
Chmiela, B.
Zubko, M.
Tematy:: high-manganese steels
TRIPLEX
microstructure
ĸ carbides
M7C3
EBSD
Nb and Ti micro-additives
grain size; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/353026.pdf Link otwiera się w nowym oknie
Opis:: The results are based on two experimental high-manganese X98MnAlSiNbTi24-11 and X105MnAlSi24-11 steels subjected to thermo-mechanical treatment by hot-rolling on a semi-industrial processing line. The paper presents the results of diffraction and structural studies using scanning and transmission electron microscopy showing the role of Nb and Ti micro-additives in shaping high strength properties of high-manganese austenitic-ferritic steels with complex carbides. The performed investigations of two experimental steels allow to explain how the change cooling conditions after thermo-mechanical treatment of the analysed steels affects the change of their microstructure and mechanical properties. The obtained results allow assessing the impact of both the chemical composition and the applied thermo-mechanical treatment technology on the structural effects of strengthening of the newly developed steels.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effect of high-temperature heating on chemical changes in M7C3 carbides of AISI D2 tool steel
Autorzy:: Nykiel, T.
Hryniewicz, T.
Tematy:: D2 tool steel
high-temperature heating
Austenitizing
coarse primary M7C3 carbides
chemical composition; Pokaż więcej
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:: https://bibliotekanauki.pl/articles/411883.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the study results obtained on 16H12MF/NC11LV/D2 tool steel. The main purpose of the study was to establish the chemical composition of the coarse primary M7C3 carbides occurring in that steel after a standard soft annealing. The effect of high-temperature annealing in the air atmosphere was investigated. The study was limited to the decarburized layer, on the distance of about 0.4 mm from the surface, of hardened steel after annealing and austenitizing at 1150 ºC in the air atmosphere for the periods of 30 and 90 minutes. It was found that the coarse primary M7C3 carbides of the annealed D2 tool steel differ significantly as to the contents of Cr, Mo, and V, and in the most degree to the contents of chromium and molybdenum. The average concentration of chromium rises successively with the growth of austenitizing time. On the other hand, the concentrations of molybdenum and vanadium are lower after 30 minutes of austenitizing than their concentrations in the similar carbides of the annealed steel. Prolongation of the austenitizing time up to 90 minutes results in the increase of molybdenum and vanadium contents in the coarse carbides. It was found that austenitizing of AISI D2 tool steel at the temperature of 1150 ºC in the air atmosphere leads to precipitation of the second phase, brighter in the BSE_Z pictures, in relation to the matrix of carbides, with the amount and magnitude being higher with the annealing time.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Microstructure and Properties of 17Cr-0.8C Cast Steel
Autorzy:: Kalandyk, B.
Zapała, R.
Pałka, P.
Wróbel, M.
Tematy:: martensitic cast steel
M23C6
Fe7C3
Fe3C carbides
heat treatment
microstructure
hardness; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/353847.pdf Link otwiera się w nowym oknie
Opis:: The results of studies of the microstructure and properties of cast high alloy steels containing 17% Cr and 0.8% C subjected to different variants of heat treatment are presented. For phase identification, the light microscopy and scanning electron microscopy as well as the X-ray diffraction analysis were used. The conducted studies revealed the presence of carbides in the microstructure, mainly of the M₂₃C₆ carbide, detected after both quenching and tempering at 200 and 600°C. The use of low and high tempering significantly reduced the test alloy hardness from 657.3 HV₃₀ to 403.7 HV₃₀. At the same time, hardness was observed to have an impact on the values of abrasion in the conducted Miller slurry test. Higher material hardness leads to lower wear expressed by mass loss.
Dostawca treści:: Biblioteka Nauki

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