M. Járó - L. Költő szerk.: Archaeometrical research in Hungary (Budapest, 1988)

Analysis - HEGEDŰS Zoltán: Metallography of some findings of Vasvár

METALLOGRAPHY OF SOME FINDINGS OF VASVAR Iron fractions of cast iron came to light in course of the excavations performed a Vasvar after 1975. The chemical composition of these are the following: Mark C mass% Si mass% Mn mass% S mass% P mass% V6 3.80 0.09 130 0.022 0.440 V8 3.70 1.55 1.26 0.027 0220 V12 4.05 1.12 127 0.028 0.232 The fracture surface of the V—marked piece is in its full cross-section a bright white fracture. The maximum diameter comes to 110 mm and its thickness to 30 mm. The fractures of the V8 and of the abnormal shaped V9 - not analysed because of its small (15X10 mm) size - are typical of the grey cast iron. The structure of the V6 cast iron is ledeburitic, and in the cases of V8 and VI2 we have a lamellar graphitic-perlitic-steaditic structure. The structure of sample V9a deserves particular attention. Its structure is mainly a lamellar graphite in a perlitic base with more or less steadite. But in some places on the graphite plates a secondary graphit has segregated; this is encircled by ferritic grains, the laminar perlite degradated and started to go over into solution: Fig. (N = 600X, etched by a 3%-alcoholic nitric acid). *H-1111 Budapest, ligymanyosi ut 26.