Assessment of Microstructure and Mechanical Properties of the Slag Ladle after Exploitation

• Autorzy: Kalandyk Barbara , Zapała Renata , Sobula Sebastian , Tęcza Grzegorz , Piotrowski K.

Identyfikatory

DOI

10.24425/amm.2021.135865

• Języki publikacji: EN

Abstrakty

EN

The results of tests and examinations of the microstructure and mechanical properties of cast steel used for large-size slag ladles are presented. Castings of this type (especially large-size ladles with a capacity of up to 16 m³) operate under very demanding conditions resulting from the repeated cycles of filling and emptying the ladle with liquid slag at a temperature exceeding even 1600°C. The changes in operating temperature cause faster degradation and wear of slag ladle castings, mainly due to thermal fatigue.The tests carried out on samples taken from different parts/areas of the ladle (flange, bottom and half-height) showed significant differences in the microstructure of the flange and bottom part as compared to the microstructure obtained at half-height of the ladle wall. The flange and bottom were characterized by a ferritic-pearlitic microstructure, while the microstructure at the ladle half-height consisted of a ferritic matrix, cementite and graphite precipitates. Changes in microstructure affected the mechanical properties. Based on the test results it was found that both the flange and the bottom of the ladle had higher mechanical properties, i.e. UTS, YS, hardness, and impact energy than the centre of the ladle wall. Fractography showed the mixed character of fractures with the predominance of brittle fracture. Microporosity and clusters of non-metallic inclusions were also found in the fractures of samples characterized by low properties.

Słowa kluczowe

EN

slag pots; cast steel; mechanical properties; degradation of microstructure

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2021
• Tom: Vol. 66, iss. 2
• Strony: 351--358
• Opis fizyczny: Bibliogr. 18 poz., fot., rys., tab., wykr.

Twórcy

autor

Kalandyk Barbara

• AGH University of Science and Technology, Department of Cast Alloys and Composite Engineering, Faculty of Foundry Engineering, 23 Reymonta str., 30-059 Krakow, Poland

• https://orcid.org/0000-0002-4604-0281

autor

Zapała Renata

• AGH University of Science and Technology, Department of Cast Alloys and Composite Engineering, Faculty of Foundry Engineering, 23 Reymonta str., 30-059 Krakow, Poland

• https://orcid.org/0000-0002-7634-8316

autor

Sobula Sebastian

• AGH University of Science and Technology, Department of Cast Alloys and Composite Engineering, Faculty of Foundry Engineering, 23 Reymonta str., 30-059 Krakow, Poland

• https://orcid.org/0000-0001-7270-3723

autor

Tęcza Grzegorz

• AGH University of Science and Technology, Department of Cast Alloys and Composite Engineering, Faculty of Foundry Engineering, 23 Reymonta str., 30-059 Krakow, Poland

• https://orcid.org/0000-0001-8075-6526

autor

Piotrowski K.

• Krakodlew S.A., 1 Ujastek Str., 30-969 Krakow, Poland

Bibliografia

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Uwagi

1. This work has been partially executed under a research Project P1.1.1-PG-09-001.

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).