Kučera, J - Search Results - Digital Repository

guest :: login Digital Repository
		Search		Submit		Help		About

Home > Search Results: Kučera, J

Search:

Search Tips :: Advanced Search

Search collections:

Sort by:	Display results:	Output format:

	Long-Time Oxidation of gammaFe and LH15 Steel at High Temperatures in Air Kučera, Jaroslav ; Adamaszek, K. ; Jurasz, Z. The results of surface oxidation and decarburizatin of (Fe, C, Mn, Si, Cr, Ni) steels are reported. The oxidation anneals were carried out at temperatures T = 940, 980, 1020, 1060, 1100 oC. The time course of Fe and of steels oxidation is expressed by parabolic law. The surface oxidation is accompanied by decarburization of surface steel layers. The evaluation of measured carbon concentration profiles N(C,x,t) yields diffusion coefficients D(C,T). Oxidation coefficients kp(T) are linearly proportional to D(C,T). Detailed record
	THE INFLUENCE OF HIGH TEMPERATURES ON THE DIRECTION OF CARBON DIFFUSION FLUX IN STEEL WELDMENTS Kučera, Jaroslav ; Michalička, Petr ; Million, Bořivoj ; Rek, A. ; Stránský, K. The redistribution of carbon in steel weldments heated at temperatures situated in the range 500 °C up to 1100 °C is reported. The sandwich-like specimens used for experiments were made from the steels A .IDENT. (ČSN 17242) and K .IDENT. (P91). It was stated that at low temperatures (500-750 °C) the carbon diffusion flux is directed from the steel A into the steel K and at high temperatures from K into A. Detailed record
	OXIDATION OF Fe AND STEELS AT HIGH TEMPERATURES Kučera, Jaroslav ; Adamaszek, K. ; Hajduga, M. The results of surface oxidation and decarburization of (Fe, C, Mn, Si, Cr, Ni) steels are reported. The oxidation anneals were carried out at temperatures T = 940, 980, 1020, 1060, 1100 °C. The time course of Fe and of steels oxidation is expressed by parabolic law l = kp . The surface oxidation is accompanied by decarburization of surface steel layers. The evaluation of measured carbon concentration profiles N(C,x,t) yields diffusion coefficients D(C,T). Oxidation coefficients kp(T) are linearly proportional to D(C,T). Detailed record
	LONG-TIME OXIDATION OF .gamma.Fe AND LH15 STEEL AT HIGH TEMPERATURES IN AIR Kučera, Jaroslav ; Adamaszek, K. ; Jurasz, Z. The investigation of long-time oxidation of gFe and of low alloyed steel LH15 in ambient air is reported. The specimens of gFe had the form of wires with diameter f = 3.0 mm. The relative weight gain Dw/w of these specimens grows in the course of oxidation anneal due to the oxides FeO, Fe3O4, Fe2O3 formation. The weight gain is stopped at very long time period t of oxidation anneals. This phenomenon is denoted as saturation effect. The same effect was observed in the case of oxidation of specimens made from low alloyed steel LH15. The specimens had the form of cylinders with diameter .fi. = 10 mm. Detailed record
	Long-time oxidation of carbon steel grade 55 and bearing steel LH15 at high temperatuers Adamaszek, K. ; Jurasz, Z. ; Kučera, Jaroslav High temperature oxidation of the cylindrical samples (f = 10 diameter and l = 15mm length) made of carbon steel grade 55 and bearing steel LH15 has been performed in air in temperature range 940ů1100°C and for various times. Using the experimentally measured thickness of scale layers, the oxidation process of mentioned steels have been compared. Detailed record
	The problems of rating and of temperature influence on interaction coefficients in iron and steels Stránský, Karel ; Kučera, Jaroslav ; Million, Bořivoj ; Šenberger, J. The present paper deals with rating and with influence of temperature dependence of thermodynamic .epsilon.ic and diffusion .beta.ic interaction coefficients in .gamma.Fe and in austenitic steels. The investigation of the published and of our own data sets has shown that, in the frame of standard experimental deviations, the relation .beta.ic = .epsilon.ic. Detailed record
	Decarburization of Fe-C-Cr-Mn-Si steels at high temperatures in ambient air Hajduga, M. ; Glowacki, J. ; Kučera, Jaroslav The measured values of carbon concentration N(C,x,t) make it possible to get the diffusivities D(C) and hardness values HV(x,t) the coefficients D(HV). The values D(HV)=D(C) in the case that HV(x,t) values are dierectly proportional to N(C,x,t). It is shown that the fatigue limit of carbon steels may calculated from the relation ńëa=0.235HV05. Detailed record
	The measurement of carbon diffusion in steels by chromatografic method Hajduga, M. ; Kučera, Jaroslav Detailed record
	Decarburization and Microhardness Changes of Fe-C-Cr Steels during High-Temperature Oxidation in Air Hajduga, M. ; Glowacki, J. ; Kučera, Jaroslav ; Brož, P. Detailed record
	Diffusion of carbon and changes of hardness of steels Fe-C-Cr caused by high temperature oxidation on air Kučera, Jaroslav ; Hajduga, M. ; Glowacki, J. ; Brož, P. Detailed record

See also: similar author names
80	KUČERA, Jan
24	KUČERA, Jaroslav
44	KUČERA, Jiří
18	KUČERA, Josef
1	Kučera, J.
16	Kučera, Jakub
80	Kučera, Jan
1	Kučera, Jaromír
24	Kučera, Jaroslav
1	Kučera, Jiljí
44	Kučera, Jiří
6	Kučera, Jonáš
18	Kučera, Josef
3	Kučera, Jáchym
80	Kučera, Ján

Interested in being notified about new results for this query?
Subscribe to the RSS feed.

Digital Repository :: :: :: ::
Powered by v1.1.2
Maintained by

This site is also available in the following languages:
Česky English