An assessment of the derivative thermal analysis of grey cast iron

• Autorzy: Binczyk F.
• Języki publikacji: EN

Abstrakty

EN

a graph of Derivative Thermal Analysis (DTA) to determine the chemical composition and selected mechanical properties. For an assessment of the degree of consistency obtained between the examined parameters, the analysis of regression and Pearson's correlation based on a linear model were used. The subject of assessment were 72 melts made in a period from October till December 2006. The best consistency was achieved for carbon and silicon content and for the carbon equivalent liquidus CEL - over 50 % consistency of the obtained results. In the case of hardness HB and tensile strength Rm only 6 and 13,8 % of the results obtained by measurement and DTA rendered the same values. Therefore, it has been claimed that in such cases the data obtained from DTA curve analysis cannot serve as a tool valid in forecasting of the above mentioned properties. Since the analysed parameters have been reported to lack the required consistency, some doubts may raise also the evaluation of recalescence, the value of which is used as a starting point in determination of the inoculant level. Consequently, some changes were proposed in the method used so far to evaluate the effectiveness of the cast iron inoculation process.

Słowa kluczowe

EN

DTA diagram; chemical composition; hardness; tensile strength; correlation diagram; inoculation

PL

DTA diagram; twardość; wytrzymałość na rozciąganie

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2007
• Tom: Vol. 7, iss. 3
• Strony: 21--24
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Binczyk F.

• Chair of Metal Alloys and Composites Engineering, Silesian University of Technology, Krasińskiego Str. 8, 40-019 Katowice,

Bibliografia

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• [2] S. Pietrowski, B. Pisarek: Estimation of chromium cast iron structure by DTA method, Solidification of Metals and Alloys, No. 16, Gliwice, (1992), 179-190, (in Polish).
• [3] M. Stawarz , J. Szajnar: Evaluation of ductile cast iron quality with DTA method, Archives of Foundry, vol. 3, No 10, Katowice, (2003), 199-206, (in Polish).
• [4] Pietrowski S, Władysiak R.: Assessment of cast steel crystallization with DTA method, Archives of Foundry, vol.3, No 8, Katowice, (2003), 293-300, (in Polish).
• [5] F. Binczyk: Evaluation of AK11 silumin refining and modification by simultaneous DTA and DTA thermical analysis method, Solidification of Metals and Alloys, No 32, Katowice (1997), 170-177. (in Polish).
• [6] C. Popdrzucki: Cast iron-structure and properties, ZG STOP, Kraków, (1991), (in Polish).
• [7] E. Fraś, Crystallization of metals, WNT, Warsaw, 2003 (in Polish).
• [8] M. Maliński, J. Szymszal, Współczesna statystyka matematyczna w medycynie w arkuszach kalkulacyjnych. Wyd. Śl.A.M., Katowice (1999), (in Polish).
• [9] T. Gerber: Statystyczne sterowanie procesami - Doskonalenie jakości z pakietem STATISTICA, Wyd. StatSoft, Kraków (2000), (in Polish).