Quality of precipitation annealing of heat-resistant cast steel using a Taguchi analysis

Autor:	Martin Folta, Alen Delić
Rok vydání:	2021
Předmět:	Taguchi methods Materials science Polymers and Plastics Casting (metalworking) Scanning electron microscope Centrifugal casting (industrial) Precipitation (chemistry) Metallurgy Metals and Alloys Microstructure Carbide Annealing (glass)
Zdroj:	Materiali in tehnologije. 55:83-88
ISSN:	1580-3414 1580-2949
DOI:	10.17222/mit.2020.074
Popis:	In this study, the effects of temperature and time on the hardness of heat-resistant cast steel HK30 Nb obtained with centrifugal casting were analysed using the Taguchi method. On the basis of the analysis of the obtained results, we reached reliable conclusions on the improvement of the exploitation properties. The tests showed that precipitation annealing of a HK30 Nb casting can improve the exploitation properties at high temperatures. The defined temperature and holding time comply with the results of the mathematical analysis of the achieved properties, and the presumed research theory from this study can hence be confirmed. The studies showed that the mechanical properties improved during the precipitation-annealing process. During this process, significant transformations of the carbide phase occur in the microstructure, thereby changing its morphology, distribution, size and composition, which was confirmed by testing the microstructure with a scanning electron microscope.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a56ec8e118cb5005b4f7b697fbc4e683 https://doi.org/10.17222/mit.2020.074 Zobrazit plný text záznamu