Autor: Nowak, Marcin. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Investigating the Possibility of Regenearation by Hardfacing for Forging Tools Based on Analysis of Tool Working Conditions and Wear Evaluationy
Autorzy:: Widomski, Paweł
Kaszuba, Marcin
Krawczyk, Jakub
Nowak, Bartłomiej
Lange, Artur
Sokołowski, Paweł
Gronostajski, Zbigniew
Powiązania:: https://bibliotekanauki.pl/articles/2176476.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: forging tool
regeneration
hardfacing
wear
Opis:: Tests were performed on example tools applied in hot die forging processes. After withdrawal from service due to excessive wear, these tools can be regenerated for re-use through machining and hardfacing. First, analysis of worn tools was carried out for the purpose of identifying tool working conditions and wear mechanisms occurring in the surface layer of tools during forging. Testing of worn tools included observations under a microscope, surface scanning and microhardness measurement in the surface layer. The results indicate very diverse work conditions, which suggest the application of different materials and hardfacing tool regeneration technology in individual die forging processes.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 4; 1395--1410
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Reconstruction of the Late Bronze Age Foundry Process in Greater Poland: Analyzes and Simulations. Case Study of Hoard from Przybysław
Autorzy:: Garbacz-Klempka, Aldona
Piękoś, Marcin
Perek-Nowak, Małgorzata
Kozana, Janusz
Żak, Paweł
Fijołek, Andrzej
Silska, Patrycja
Stróżyk, Mateusz
Powiązania:: https://bibliotekanauki.pl/articles/2134106.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: archaeometallurgy
copper alloys
casting
CALPHAD
computer modeling
Late Bronze Age
Opis:: One of the most interesting categories of artifacts for archaeometallurgical research includes deposits of bronze items, so-called “metallurgists hoards”. They contain, aside of final products, many fragments of raw material and, moreover, metallurgical tools. An important source for the studies on the history of metallurgical technology is hoard from Przybysław, Greater Poland district. Thus, the aim of the work is the identification and interpretation of bronze-working practices and strategies adopted by prehistoric communities of the Late Bronze Age and the Early Iron Age (ca. 600 BC). The examined objects are characterized in terms of their design, structure, and chemical composition. The methods chosen for the studies of artifacts include: metallographic macro- and microscopic observations using optical microscopy (OM) and scanning electron microscopy (SEM), the analysis of chemical composition with the methods of energy dispersive X-ray spectroscopy (EDS), and X-ray fluorescence (ED-XRF). The thermodynamic analysis of the alloys was performed on the basis of the CALPHAD method. The experimental melts allowed to verify the theoretical considerations and to determine the characteristic temperatures of changes. The old casting technology can be analyzed basing on computer modeling and computer simulation methods. Simulations in the MAGMASOFT® software are a good example to illustrate how to fill a mould cavity with a molten bronze for a hoop ornament. It is also an appropriate tool to determine temperature distribution in a mould. The simulations also show the possible disadvantages with this old technology.
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 3; 1125--1136
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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