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ArticleName On new mathematics methods in the analysis of microstructures of eutectoid colonies in pearlitic steels
ArticleAuthor A. N. Chichko, O. A. Sachek, V. F. Sobolev, A. V. Vedeneev
ArticleAuthorData

Byelorussian State Technical University (Minsk, Belarus):

A. N. Chichko, O. A. Sachek, V. F. Sobolev

Byelorussian Steel Works (BMZ) — Management Company of “Byelorussian Metallurgical Company” Holding, Steel Cord and Wire Products Research Centre (Zhlobin, Belarus):

A. V. Vedeneev
E-mail: metsc@bmz.gomel.by

Abstract

The paper describes an algorithm for the mathematical description of microstructures of pearlitic steels. The purpose of this work is the development of a method for mathematical description of the microstructures in pearlitic steels for their quantification. It is proves the fact that the mathematical models of microstructures, developed using the frequency distribution of eutectoid colonies in pearlitic steels depending on interlamellar distances, allow estimating the degree of heterogeneity of a microstructure. It is known that microstructures of pearlitic steels, obtained under non-equilibrium conditions, consist of eutectoid colonies formed after decomposition of austenite and incoherently distributed in the plane of the section. At the same time, in different parts of microstructure, the sizes of interlamellar distances of “ferrite-cementite” system can differ by several times. In these circumstances, establishment of relationships between the characteristics of microstructure and steel properties is virtually impossible, if using the traditional approaches based on qualitative analysis of microstructure. Simple averaging of microstructure parameters equalizes structural features of eutectoid colonies and the study of relationship between the properties of steel and its microstructure parameters becomes even more complicated. At the same time, today’s computer-based image processing techniques open up new possibilities for analyzing the relationship “structure-properties”.

keywords Microstructure, pearlitic steels, mathematical methods, eutectoid colonies, ferrite, cementite, austenite, mechanical properties, qualitative analysis
References

1. Bochvar A. A. Metallovedenie (Metal science). Moscow : Metallurgiya, 1956.
2. Saltykov S. A. Stereometricheskaya metallographia (Stereometric metallography). Moscow : Metallurgiya, 1970.
3. Toshimi T. Microstructure control and strengthening of steel tire cord. Ferum. 2006. № 12. P. 791– 797.
4. Delrue H., Bruneel E., Humbeed J. V. Atomic Force Microscopy: A powerful tool to study the radial gradients in mechanical properties of hard-drawn pearlitic steel wire. Wire Journal International. 2001. № 10. P. 92–98.
5. Gardin A. I. Elektronnaya mikroskopiya stali (Electronic microscopy of steel). Moscow : Gosudarst vennoe nauchno-tekhnicheskoe izdatelstvo litera tury co chernoy i tsvetnoy metallurgii — State scientific and technical publishers of the literature on ferrous and nonferrous metallurgy. 1954. 234 p.

6. Rostoker V., Dvorak V. Mikroskopicheskiy metod v metallurgii (Mocroscopic method in metallurgy). Moscow : Metallurgiya, 1967. 205 p.
7. Ivaditov A. N., Gorbanev A. A. Razrabotka i osvoenietekh nologii proizvodstva vysokokachestvennoy katanki (Development and mastering of high-quality wire rod production). Moscow : Metallurgiya, 1989. 255 p.
8. Gulyaev A. P. Metallovedenie (Metal science). Moscow : Metallurgiya, 1986. 302 p.
9. Lakhtin Yu. M. Metallovedenie i termicheskaya obrabotka metallov (Metal science and metal heat treatment). 3rd edition. Moscow : Metallurgiya, 1983. 360 p.

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