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Cast iron spheroidization by plunging method and cored wire method

Soiński M. S., Wachowski A.

Archives of Foundry Engineering

2009

Vol. 9, iss. 1

199-202

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.