- Tytuł:
- Microstructure Characteristic of TiC-Reinforced Cast Steel after GTAW Remelting
- Autorzy:
-
Sobula, S.
Kwiecień, A.
Olejnik, E.
Pałka, P. - Tematy:
-
composite steel casting
TiC
reinforced cast steel
GTAW surface remelting
odlew staliwny
odlew kompozytowy
metoda GTAW
utwardzanie powierzchniowe - Pokaż więcej
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Powiązania:
- https://bibliotekanauki.pl/articles/380286.pdf Link otwiera się w nowym oknie
- Opis:
- In this study, low-carbon cast steel was reinforced with TiC by SHS-B method, also known as combustion synthesis during casting method. The composite zone was then subjected to surface remelting by Gas Tungsten Arc Welding (GTAW) method. The remelting operation was realized manually, at 150 A current magnitude. Microstructure, phase composition and hardness of remelted zone were investigated. XRD results reveal that the phases of the composite zone in initial state consist of TiC and Feα. Surface remelting resulted in formation of thick layers containing TiC carbides, Feα and Feγ. Microstructural examination has shown strong refinement of titanium carbides in remelted zone and complete dissolution of primary titanium carbides synthetized during casting. The average diameter of carbides was below 2 μm. The structural changes are induced by fast cooling which affects crystallization rate. The hardness (HV30) of the remelted layer was in the range between 250 HV and 425 HV, and was lower than hardness in initial state.
- Dostawca treści:
- Biblioteka Nauki
Artykuł