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1

Wear of foundry carbon-iron alloys in the condition of erosive destruction. Part II

Pirowski Z., Gościański M., Dudziak B.

Journal of Research and Applications in Agricultural Engineering

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2013

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Vol. 58, nr 2

127--130

EN

A comparative laboratory research on a special testing stand of casting materials erosive wear have been conducted in terms of assessing their tribological properties. Different types of carbon iron alloys have been used, as well as modified alloys (metallurgically) in order to increase their resistance to this type of wear. Results have been presented in the form of tables and graphs.

PL

Przeprowadzono laboratoryjne porównawcze badania materiałów odlewniczych w warunkach zużycia erozyjnego w aspekcie oceny ich właściwości tribologicznych z użyciem specjalistycznego stanowiska badawczego. Wykorzystano różne stopy żelaza z węglem; do badań tych użyto także stopy modyfikowane metalurgicznie i cieplnie w celu zwiększenia ich odporności na ten rodzaj zużycia. Wyniki badań zaprezentowano w postaci wykresów i tabel.

2

Wpływ mikrododatku boru na zmiany hartowności w żeliwie sferoidalnym z przemianą izotermiczną w odniesieniu do odlewów grubościennych

Pirowski Z., Wodnicki J., Olszyński J., Gościański M., Dudziak B.

Journal of Research and Applications in Agricultural Engineering

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2012

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Vol. 57, nr 2

153-155

PL

W artykule omówiono wpływ mikrododatku boru na strukturę i właściwości stali oraz przedstawiono wyniki badań wpływu tego pierwiastka na hartowność żeliwa sferoidalnego z przemianą izotermiczną.

EN

Impact of boron microadditive on steel structure and properties and the research results of the influence of this element on the hardenability of ductile iron with isothermal transformation have been discussed in the paper. Experimental results are presented and analyzed.

3

Microstructure of massive iron-carbon alloys obtained by mechanical alloying and sintering

Nowosielski R., Pilarczyk W.

Archives of Materials Science and Engineering

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2007

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Vol. 28, nr 4

246-253

EN

Purpose: The ultimate aim of this work was to investigate structure and properties massive Fe-6.67%mass.C and Fe-0.4%mass.C materials obtained by mechanical alloying and sintering. Design/methodology/approach: The powders of the iron-carbon alloys obtained by mechanical alloying method and after that the powders were sintering. The sintering process was conducted by using the impulseplasma method. In this article the usability of mechanical alloying method and sintering to produce the massive Fe-C materials were presented. The morphology of voids of iron-carbon sinters was analyzed using the scanning electron microscopy method. The distribution of powder particles was determined by a laser particle analyzer. The observation of the shape and size of the grains was carried out by means of the LEICA optical microscope. Then one performed the measurements of the hardness with the Vickers method. The density of the sinters was measured using the Multivolume Pycnometer 1305. Findings: The laboratory tests show that, by using the mechanical alloying method, one can produce powder of Fe-6.67%mass.C and Fe-0.4%mass.C alloys with intentional chemical constitution and desirable structure. The structure of the alloyed materials is homogeneous and fine-grained and inside the materials didn't find some impurities and undesirable phases. The sintering by using the impulse-plasma method makes the sinters with close to theoretical density with non-variable nanocrystaline structure possible. The hardness of the sinters were 1300 HV and 250 HV adequately. Research limitations/implications: Property of Fe-C alloys correction is possible by refinement of grains and modification of phases composition. Nanocrystaline size of grain is advisable to make it in correct technology of producing bulk materials with nanocrystaline structure. All of the presented experiments in this article are made on a laboratory scale. At the present time, most often, the mechanical alloying and the sintering processes of nanocrystaline materials are only just in the laboratory scientific research. In the nearest future the producing of amorphous and nanocrystaline materials will take place not only in the laboratory scale and move to the industry. Originality/value: The powders produced by using mechanical alloying techniques can be use to produce bulk materials with desirable mechanical, physical and chemical properties.

4

The Fe-C alloy obtained by mechanical alloying and sintering

Nowosielski R., Pilarczyk W.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 18, nr 1-2

167--170

EN

Purpose: The main aim of this work was to determine structure and properties massive Fe-C materials obtained by mechanical alloying and sintering. Design/methodology/approach: The results of experiments on the fabrication of powders materials and solid materials using pure iron and graphite powders are presented. The powders of the Fe-C alloys obtained by mechanical alloying method and after that the powders were sintering. The sintering process was conducted by using the impulse-plasma method. In this article the usability of mechanical alloying method and sintering to produce the massive materials were presented. Findings: The laboratory tests show that, by using the mechanical alloying method, one can produce powder of Fe-6.67% mass.C alloy with intentional chemical constitution and desirable structure. The structure of the materials is homogeneous and fine-grained and inside the materials didn’t find some impurities and undesirable phases. The sintering by using the impulse-plasma method makes the sinters with close to theoretical density with non-variable nanocrystaline microstructure possible. The hardness of the sinters was 1300 HV. Research limitations/implications: The mechanical alloying method is one of the techniques which enables to improve property of Fe-C alloys. It is possible by refinement of structure and modification of phases composition. Nanocrystaline size of grain is advisable to make it in correct technology of producing massive materials with nanocrystaline structure. All of the presented experiments in this article are conducted on a laboratory scale. At the present time, all over the world, the mechanical alloying and the sintering processes of nanocrystaline materials are only just in the laboratory scientific research. In the nearest future the producing of nanomaterials will take place not only in the laboratory and move to the industry. Originality/value: The nanomaterials have an unusual mechanical, physical and chemical properties.

5

Odporność bainityczno-austenitycznego żeliwa sferoidalnego na działanie korozyjne kwasów: siarkowego, azotowego i solnego

Rączka J., Tabor A., Kowalski A.

Czasopismo Techniczne. Mechanika

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2001

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R. 98, z. 2-M

157--167

EN

After a short characteristic of bainitic-austenitic ductile iron, the results of own investigation including studies of the mechanical properties and corrosion behaviour in acids like H[2]SO[4], HNO[3] and HCI of this cast iron were discussed. The obtained results were evaluated and the possibilities of their application in industrial practice were emphasized