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SiMo Ductile Iron Crystallization Process

100%

Stawarz M.

tom Vol. 17, iss. 1

147--152

The article presents crystallization process of silicon molybdenum ductile cast iron (SiMo). The alloy with 5% silicon content and with variable amounts of Mo in a range of 0-1% was chosen for the research. The carbon content in the analysed alloys did not exceed 3,1%. The studies of crystallization process were based on thermal – derivative analysis (TDA). Chemical composition of all examined samples was analysed with the use of LECO spectrometer. Additionally, the carbon and the sulphur content was determined basing on carbon and sulphur LECO analyser. For metallographic examination the scanning electron microscopy (SEM) with EDS analyser was used. Disclosed phases have been also tested with the use of X-ray diffraction. The results allowed the description of crystallization processes of silicon molybdenum ductile cast iron using thermal – derivative analysis (TDA). Conducted studies did not allow for the clear identification of all complex phases containing molybdenum, occurring at the grain boundaries. Therefore, the further stages of the research could include the use of a transmission electron microscope to specify the description of complex compounds present in the alloy.

Thermal gradient analysis of solidifying casting

85%

Suchoń J. , Cholewa M. , Kondracki M.

tom Vol. 8, iss. 3s

107--110

For description of casting solidification and crystallization process the thermal derivative analysis (TDA) is commonly used. Besides the process kinetics considered in TDA method to describe the solidification process, the thermal gradient analysis can be also used for this purpose [1, 2]. In conducted studies analysis of thermal gradient distribution inside the solidifying wedge casting was shown which enabled determination of heat flow intensity on casting section.

Examining the Possibilities of Analyzing the Solidification Process of Al-Si Alloy with the Infrared Camera

80%

Władysiak R. , Kozuń A. , Pacyniak T.

tom Vol. 16, iss. 1

89--94

The paper presents the results of the crystallization process of silumin by the TDA thermographic method and the results of the cast microstructure obtained in the sampler ATD-10, that was cooling down in ambient air. The study was conducted for silumins AlSi8 and AlSi11 unmodified. The work demonstrated that the use of thermal imaging camera allows for the measurement and recording the solidification process of silumin. Thermal curve was registered with the infrared camera and derivative curve that was calculated on the base of thermal curve have both a very similar shape to adequate them TDA curves obtained from measurements using a thermocouple. Test results by TDA thermographic method enable quantitative analysis of the kinetics of the cooling and solidification process of hypo- and neareutectic silumins.

Possibilities of obtaining and controlling high-quality pressure castings

71%

Pietrowski S. , Walczak W. , Pisarek B. , Władysiak R.

2011

tom Vol. 11, iss. 3

125-142

The paper presents the influence of the type of furnace charging melting, refining and modification silumins 226 and 231 on the porosity and microstructure of castings. It was shown that in order to reduce or eliminate the porosity of the castings is necessary to the refining ECOSAL-AL113 of liquid silumin both in the melting furnace, and in the ladle and an additional nitrogen, in the heat furnace modified and refining with nitrogen. To control the effects of refining and modifying the TDA method was used. It was found that based on crystallization curve can be qualitatively assess the gas porosity of the castings. In order to control and quality control silumins author developed a computer program using the method of TDA, which sets out: Rm, A5, HB and casting porosity P and the concentration of hydrogen in them. The program also informs the technological procedures to be performed for liquid silumin improper preparation.

Żeliwo sferoidalne z węglikami

71%

Pietrowski S. , Gumienny G.

Archiwum Odlewnictwa

2006

tom R. 6, nr 19

233-238

W pracy przedstawiono możliwość otrzymania węglików w żeliwie sferoidalnym stopowym z dodatkiem chromu, miedzi, niklu i molibdenu.

In these paper the possibility obtaining carbides in ductile cast iron with chromium, nickel, copper and molybdenum have been presented.

Development of a New ATD-P Tester for Hard Wear Resistant Materials

57%

Dojka R. , Dojka M. , Studnicki A.

SiMo Ductile Iron Crystallization Process

29%

Stawarz M.

nr 1