Influence of Soaking Parameters on the Segregation and Corrosion Resistance of GJS-X350NiMnCu7-3-2 Ductile Iron

• Autorzy: Medyński D. , Janus A. , Stachowicz M.

Identyfikatory

DOI

10.1515/afe-2017-0053

• Języki publikacji: EN

Abstrakty

EN

In this paper, the effect of changes the parameters of heat treatment on the structure and the degree of elements segregation was determined, in the context of corrosion resistance of ductile iron Ni-Mn-Cu, containing 7.2% Ni, 2.6% Mn and 2.4% Cu. In the condition after casting, castings of austenitic matrix and 160HBW hardness were obtained. The achieved castings were soaked at 450, 550 and 650°C for 4, 8 and 12 hours, then cooled down at the ambient air. In most cases, the heat treatment resulted in a change in the castings matrix, had the consequence of increasing their hardness in comparison to raw castings. Increasing the temperature and prolonging soaking time resulted in increasing the degree of transformation of austenite, while reducing the degree of elements segregation. This led to the formation of slightly bigger number of pitting due to corrosion, but not so deep and more evenly distributed in comparison to raw castings. Wherein the results of corrosion tests show that heat treatment of castings did not significantly change their corrosion resistance in comparison to raw castings, in contrast to the significant increase in mechanical properties.

Słowa kluczowe

EN

heat treatment; austenitic ductile iron; transformation of austenite; corrosion resistance; segregation of elements

PL

obróbka cieplna; żeliwo sferoidalne; austenit; odporność na korozję

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 2
• Strony: 69--74
• Opis fizyczny: Bibliogr. 18 poz., il., tab.

Twórcy

autor

Medyński D.

• Witelon State University of Applied Science in Legnica, Department of Technical and Economic Sciences, Sejmowa 5A, 59-220 Legnica, Poland

autor

Janus A.

• Wroclaw University of Technology, Mechanical Faculty, Department of Foundry Engineering, Plastics and Automation, Smoluchowskiego 25, 50-372 Wrocław, Poland

autor

Stachowicz M.

• Wroclaw University of Technology, Mechanical Faculty, Department of Foundry Engineering, Plastics and Automation, Smoluchowskiego 25, 50-372 Wrocław, Poland

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)