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Percussive sparking of metals

Dudyk M.

Archives of Foundry Engineering

2007

Vol. 7, iss. 4

197-201

The paper presents the results of research on sparking sensitivity of metals used for casting machine parts. The research concerns on the recording of dynamics of percussive sparking on the research stand designed and made by author. The research stand enables analogue and digital recording of the percussive sparks pictures. The research on percussive sparking was performed on single and multiple smears made of aluminium (AlSi9Mg, (AK9); AlSi11, (AK11)) and magnesium (AlMg9, (AG9)) alloys as well as St3 steel. The results are presented as pictures of sparks differing in shape and size as well as temperature distribution. It was shown that the sparks with the biggest area of plume occur for AK9 alloy and the biggest area of spark nucleus occur for AK11 alloy. The sparks registered for St3 steel have very small area of the plume and nucleus. The characteristics and thermal properties determined for the registered percussive sparks may be of use for designers and users of machine parts manufactured from these materials.