Designing and controlling the microstructure of 37MnNiMo6-4-3 hypoeutectoid steel after continuous cooling

• Autorzy: Rożniata E.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Present work corresponds to the research on the kinetic of phase transformation of undercooled austenite of 37MnNiMo6-4-3 hypoeutctoid steel. The kinetic of phase transformation of under cooled austenite of investigated alloy was presented on CCT diagram (continuous cooling transformation). Also the methodology of a dilatometric samples preparation and the method of the critical points determination were described. Design/methodology/approach: The austenitising temperature was defined in a standard way i. e. 30-50°C higher than Ac3 temperature for hypoeutectoid steels. The technology of full annealing was proposed for the iron based alloy. The CCT diagram was made on the grounds of dilatograms recorded for samples cooled with various rates. The microstructure of each dilatometric sample was photographed after its cooling to the room temperature and the sample hardness was measured. Also EDS analysis was performed using scanning microscope. Findings: The test material has been hypoeutectoid steel. These steels represent a groups of alloy steels for quenching and tempering. The microstructure of test 37MnNiMo6-4-3 hypoeutectoid steel on CCT diagram changes depending on the cooling rate. Research limitations/implications: The new hypoeutectoid steel and new CCT diagram. Practical implications: The paper contains a description of one from a group of iron based model alloys with 0.35-0.40% carbon content. According to PN-EN 10027 standard this steel should have a symbol 37MnNiMo6-4-3. Originality/value: The new hypoeutectoid steel (Mn-Ni-Mo iron based model alloy).

Słowa kluczowe

EN

metallic alloys; hypoeutectoid steel; CCT diagram; EDS analysis

PL

stopy metali; stal podeutektoidalna; diagram CCT; analiza EDS

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2013
• Tom: Vol. 58, nr 1
• Strony: 24--30
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Rożniata E.

• Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

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