Thermodynamic evaluation of carbide phase precipitation in high-chromium cast irons

Скобло, Т. С.; Vishnyakova, E. N.; Mozharova, N. M.; Gazov, V. I.

doi:10.1007/bf00780432

Cited by 3 publications

(1 citation statement)

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“…Besides this, the types of carbide phases previously determined by the chemical method have been estimated [12]. In addition, calculations on the thermodynamic evaluation of the carbide phases separation in the alloyed cast iron have been performed [1,13].…”

Section: Materials and Experimentsmentioning

confidence: 99%

Effective Technological Process of Crystallization of Turning Rollers' Massive Castings: Development and Analysis

Скобло¹

2017

IJMPEM

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Abstract:The paper describes a new method of maximum reducing residual stresses and stabilization of the structure, hardness of the working layer of massive sheet rolls from alloyed cast irons during their crystallization due to controlled decomposition of retained austenite. It is achieved by programmable preheating of the metal form to the temperature of magnetic transformation of doped cementite or special carbides of the castings (depending on the material being processed); meanwhile it is provided an optimum cooling rate with an exposure of up to 6 hours in this interval and maximizes decomposition of retained austenite, minimizes stresses in the working layer. This casting technology is also accompanied by appropriate structural changes. Inhomogeneity of the dislocation structure is noted in various constituent phases. Polygonization and fragmentation along dislocation walls are revealed in the carbide phase. To evaluate the occurring processes, a new method of optical and mathematical description of the phases being formed is used. As a criterion describing the changes in the dislocation structure, we use the parameter -a power dissipation power function. The proposed casting technology for rolls is particularly effective when the proportion of the carbide phase is at least 25%. In this case, the heat treatment of the rolls to relieve stress does not change the stably achieved properties. It is shown that the quality control on the stability of the achieved indicators can be carried out by the coercive force and the level of hardness.

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Section: Materials and Experimentsmentioning

confidence: 99%

Effective Technological Process of Crystallization of Turning Rollers' Massive Castings: Development and Analysis

Скобло¹

2017

IJMPEM

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Dados empíricos e ab initio no método CALPHAD: os sistemas Fe-Cr-Mo-C e Nb-Ni-Si.

Tadeu¹,

Eleno²

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New Approaches in Study of Inhomogeneity of Heterogeneous Structures

Скобло¹,

Klochko²,

Belkin³

et al. 2018

Metallofiz. Noveishie Tekhnol.

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Thermodynamic evaluation of carbide phase precipitation in high-chromium cast irons

Cited by 3 publications

References 2 publications

Effective Technological Process of Crystallization of Turning Rollers' Massive Castings: Development and Analysis

Effective Technological Process of Crystallization of Turning Rollers' Massive Castings: Development and Analysis

Dados empíricos e ab initio no método CALPHAD: os sistemas Fe-Cr-Mo-C e Nb-Ni-Si.

New Approaches in Study of Inhomogeneity of Heterogeneous Structures

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Thermodynamic evaluation of carbide phase precipitation in high-chromium cast irons

Cited by 3 publications

References 2 publications

Effective Technological Process of Crystallization of Turning Rollers&apos; Massive Castings: Development and Analysis

Effective Technological Process of Crystallization of Turning Rollers&apos; Massive Castings: Development and Analysis

Dados empíricos e ab initio no método CALPHAD: os sistemas Fe-Cr-Mo-C e Nb-Ni-Si.

New Approaches in Study of Inhomogeneity of Heterogeneous Structures

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Effective Technological Process of Crystallization of Turning Rollers' Massive Castings: Development and Analysis

Effective Technological Process of Crystallization of Turning Rollers' Massive Castings: Development and Analysis