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1

Structure and mechanical properties as well as application of high quality vermicular cast iron

Guzik E.

Archives of Foundry Engineering

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2010

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Vol. 10, iss. 3

95--100

EN

The results of studies on the use of magnesium alloy in modern cored wire injection method and Tundish for production of vermicular graphite cast irons were described. The injection of Mg cored wire length is a treatment method which can be used to process iron melted in an electric induction furnace. This paper describes the results of using a high-magnesium ferrosilicon alloy in cored wire (Mg recovery 55%) for the production of high quality vermicular graphite cast irons at foundry. The results of calculations and experiments have indicated the length of the cored wire to be injected basing on the initial sulfur content and weight of the treated melt. The paper presents a microstructure matrix and vermicular graphite in standard sample and castings with different wall thickness. The results of numerous trials have shown that the magnesium cored wire process can produce high quality vermicular graphite with ferritic-pearlite and pearlitic-ferrite matrix irons under the specific industrial conditions.

2

Cast iron spheroidization by plunging method and cored wire method

Soiński M. S., Wachowski A.

Archives of Foundry Engineering

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2009

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Vol. 9, iss. 1

199-202

EN

Changes in chemical composition and the degree of magnesium assimilation resulting from the performed treatment have been determined basing on data coming from 185 courses of cast iron treatment by plunging or cored wire methods. The investigations have dealt with nodular iron of EN-GJS-400-18-LT and EN-GJS-500-7 grades. In the case of plunging method cast iron has been treated with VL53M master alloy containing about 9% of magnesium; for cored wire method the magnesium content in the master alloy has been about 17%. It has been stated, among others, that the carbon content has been reduced due to spheroidizing treatment by 0.12-0.30% as an average. Distinctly higher magnesium assimilation (at the level of 41-44%) has been stated for plunging method, while for cored wire method it has been found to vary from 29% to 31% as an average.

3

A study on the structure and mechanical properties of vermicular cast iron with pearlitic-ferritic matrix

Guzik E., Kleingartner T.

Archives of Foundry Engineering

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2009

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Vol. 9, iss. 3

55-60

EN

The results of studies on the use of magnesium alloy in modern cored wire injection method for production of vermicular graphite cast irons were described. The injection of Mg cored wire length is a treatment method which can be used to process iron melted in an electric induction furnace. This paper describes the results of using a high-magnesium ferrosilicon alloy in cored wire (Mg recovery 45%) for the production of vermicular graphite cast irons at Giesserei Heunisch GmbH Foundry with the pearlite matrix with about 20% ferrite content. The results of calculations and experiments have indicated the length of the cored wire to be injected basing on the initial sulfur content and weight of the treated melt. The paper presents a microstructure matrix and vermicular graphite in standard sample and different walled castings. The results of numerous trials have shown that the magnesium cored wire process can produce high quality vermicular graphite irons under the specific industrial conditions of the above mentioned foundries.

4

Struktura i właściwości żeliwa sferoidalnego otrzymanego techniką PE

Guzik E.

Krzepnięcie Metali i Stopów

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1998

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nr 36

57--62

PL

W pracy przeprowadzono ocenę przydatności sferoidyzującego przewodu elastycznego (metoda PE) do wytwarzania ferrytycznego żeliwa sferoidalnego gatunku 400-l8L, przy czym metal wyjściowy wytapiano w żeliwiaku. Przy odpowiedniej zawartości Mg w żeliwie oraz prawidłowo przeprowadzonym zabiegu modyfikowania, otrzymano regularną, kulkową postać grafitu, natomiast regulując zawartością Mn i S i zapewniono osnowę ferrytyczną. Zmiana zawartości Si w żeliwie pozwala uzyskać ferrytyczną osnowę w strukturze, zapewniającą wymaganą wartość udarności KU w obniżonej temperaturze która jest wymagana dla żeliwa sferoidalnego gatunku 400-18L.