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White Cast Iron with the Microstructure in situ Composite

Kopyciński D., Guzik E., Szczęsny A., Gilewski R., Siekaniec D.

Archives of Foundry Engineering

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2014

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Vol. 14, iss. 1 spec.

147--150

EN

Alloys based on FeAl intermetallic phases have a heat and corrosion resistance at high temperatures. With the addition of carbon in alloy the carbides appear which makes cast highly resistant to abrasion. However, this material is not widely used because of the presence in the microstructure of the aluminum carbide, which makes the casting disintegrates after a time automatically. The solution to the problem is the decomposition of aluminum carbide and replace it with another carbide forming element. In paper shows that the corresponding elements are titanium, vanadium, bismuth and boron effectively inhibit the process of self-destruction.

2

Analysis of structure and abrasion resistance of the metal composite based on an intermetallic FeAl phase with VC and TiC precipitates

Kopyciński D., Guzik E., Gilewski R., Szczęsny A., Dorula J.

Archives of Foundry Engineering

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2013

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Vol. 13, iss. 3

51--54

EN

Metal alloys with matrix based on an Fe-Al system are generally considered materials for high-temperature applications. Their main advantages are compact crystallographic structure, long-range ordering and structural stability at high temperatures. These materials are based on an intermetallic phase of FeAl or Fe3Al, which is stable in the range from room temperature up to the melting point of 1240°C. Their application at high temperatures is also beneficial because of the low cost of production, very good resistance to oxidation and corrosion, and high mechanical strength. The casting alloy the structure of which includes the FeAl phase is, among others, high-aluminium cast iron. This study has been devoted to the determination of the effect of vanadium and titanium on the transformation of the high-aluminium cast iron structure into an in-situ FeAl-VC composite.

3

Ocena odporności na utlenianie żeliwa wysokoaluminiowego

Kopyciński D., Gilewski R.

Ochrona przed Korozją

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2012

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nr 11

511-513

PL

Głównym składnikiem strukturalnym w żeliwie wysokoaluminiowym jest eutektyczny i nadeutektyczny węglik Al4C3. Dodatek Ti powoduje zanik nadeutektycznych wydzieleń węglika Al4C3 i wpływa na powstanie węglika tytanu. Zwiększanie zawartości Ti w roztworze prowadzi do ciągłego zmniejszania się udziału Al4C3 w strukturze. Przy zawartości ok. 5% tytanu, węglik Al4C3 jest zastąpiony węglikiem tytanu. Taką strukturę cechuje wysoka odporność na utlenianie otrzymanych materiałów, przewyższająca właściwości żeliwa i staliwa wysokochromowego.

EN

The main structural component in high aluminum cast iron is eutectic and hypereutectic carbide Al4C3. Ti additions promote the formation of TiC as the primary phase, but the eutectic constituent is still Al4C3. Further Ti additions lead to total replacement of the eutectic Al4C3 by TiC. In this case, at Ti mass fractions 5%, Al4C3 is totally replaced by TiC. In addition, this work indicates that the high-aluminum cast iron alloy posses high oxidation resistance, exceeding that of high-chromium cast iron and chromium cast steels.

4

The structure of high-quality aluminium cast iron

Kopyciński D., Guzik E., Szczęsny A., Gilewski R.

Archives of Foundry Engineering

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2012

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Vol. 12, iss. 1

53-56

EN

In this study presents the analyse of aluminium iron cast structure (as-cast condition) which are used in high temperature. While producing the casts of aluminium iron major influence has been preserve the structure of technological process parameters. The addition to Fe-C-Al alloy V, Ti, Cr leads to the improvement of functional and mechanical cast qualities. In this study, a method was investigated to eliminate the presence of undesirable Al4C3 phases in a aluminium cast iron structure and thus improve the production process. V and Ti additions in aluminium cast iron allows to development of FeAl - VC or TiC alloys. In particular, V or Ti contents above 5 wt.% were found to totally eliminate the presence of Al4C3. In addition, preliminary work indicates that the alloy with the FeAl - VC or TiC structure reveals high oxidation resistance. The introduction of 5 wt.% chromium to aluminium cast iron strengthened Al4C3 precipitate. Thus, the resultant alloy can be considered an intermetallic FeAl matrix strengthened by VC and TiC or modified Al4C3 reinforcements.