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Materials Science
Название Extension of ASTM E2283 standard practice for the assessment of large exogenous nonmetallic inclusions in super duty steels
DOI 10.17580/cisisr.2019.02.01
Автор A. A. Kazakov, A. I. Zhitenev, M. A. Salynova
Информация об авторе

Peter the Great St. Petersburg Polytechnic University (St. Petersburg, Russia):

A. A. Kazakov, Dr. Eng., Prof., Head of “Metallurgical Examination” Lab., e-mail: kazakov@thixomet.ru
A. I. Zhitenev, Engineer, “Metallurgical Examination” Lab., e-mail: zhitenev@thixomet.ru
M. A. Salynova, Engineer, “Metallurgical Examination” Lab.


The practice for extreme value analysis of nonmetallic inclusions described in ASTM E2283 has been applied to the examples for assessing the nonmetallic inclusions in super duty steels. An original interpretation of the measurement results obtained according to ASTM E2283 technique has been proposed, which allows extending the limits of the scope of this standard to also evaluate exogenous inclusions. This study has shown that the practice defined in ASTM E2283 can be used to identify a random, single exogenous inclusion among the largest indigenous nonmetallic inclusions, as well as to predict the longest exogenous inclusions, if they have a systemic source of penetration into the melt and are described by the corresponding Gumbel distribution. It has been found that the modern level of secondary metallurgy can produce steels with low indigenous nonmetallic inclusion ratings; however, failures of the pouring and casting technology can lead to the presence of coarse exogenous nonmetallic inclusions in the finished metal products.

Ключевые слова ASTM E2283, single large nonmetallic inclusions, indigenous, exogenous, metallographic assessment, extreme value analysis, super duty steel
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Полный текст статьи Extension of ASTM E2283 standard practice for the assessment of large exogenous nonmetallic inclusions in super duty steels