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Multitalent wśród zasilaczy serii KK

Skerdi U., Fischer S., Ergül H.

Przegląd Odlewnictwa

2012

Vol. 62, nr 1-2

44-46

Cały czas rosnące wymagania w zakresie jakości i obniżania kosztów produkcji nowoczesnych odlewów dotyczą również materiałów pomocniczych stosowanych w odlewnictwie. Aby zaoferować odlewnikom produkty o najwyższej jakości, cały czas rozwijamy sprawdzone miniaturowe zasilacze firmy ASK Chemicals Feeding Systems, które zapewniają najwyższy poziom bezpieczeństwa procesu. Te nowe projekty stanowią ważny element w produkcji odlewów. Pozwalają im znaleźć miejsce na globalnym rynku i umocnić na nim swoją pozycję.

Constantly growing requirements in the scope of quality as well as decreasing production costs of modern castings concern also auxiliary materials applied in the foundry engineering. In order to be able to offer the highest quality products we are all the time developing the verified miniature feeders of the ASK Chemicals Feeding Systems Company, which guarantee the highest safety of the process. These new projects constitute an important element in the casting production. They allow them to find place in the global market and to strengthen their position there.

The assessment of hot cracking susceptibility of ferritic-austenitic cast iron

Stradomski Z., Soiński M. S., Stradomski G.

Archives of Foundry Engineering

2010

Vol. 10, iss. 2

159--162

An inspiration to the research work has arisen from the problems related to cracking of massive castings made of ferritic-austenitic cast steel. The shape and the character of crack trajectories indicate that they are hot cracks. Investigations have included two cast steel grades, namely GX2CrNiMoN25-6-3 and GX2CrNiMoCuN25-6-3-3, because some customers had demanded for copper addition which makes possible the ageing treatment; also the alloys with increased carbon content have been investigated and this resulted from difficulties in obtaining sufficiently low carbon content (Cmax 0,03%) in many Polish foundries which are not equipped with argon-oxygen devices for cast steel decarburizing. The method of critical size of a specimen similar in shape to the Hall test specimen has been applied to examine the cast steel susceptibility to hot cracking. The examination results undoubtedly indicate the negative influence of the increased carbon content, especially in the presence of copper. The intercrystalline character of cracks which propagate along the dendritic austenite precipitates suggests that the peritectic reaction occurs in the final stage of solidification, being induced by segregation of the strong austenite-forming alloying elements. The increased hot cracking susceptibility of the ferrite-austenite cast steel containing copper, particularly with simultaneously increased carbon content, indicates that the implementation of production technologies concerning this material should be started with production of castings made of alloy grades without copper addition.