粒状黒鉛鑄鉄の熔接性に關する研究(第 2 報) : 電弧熔接について

概要

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The author conducted the bead test and mechanical test of welds using the welding core of nodular graphite cast iron, Al-cast iron and ordinary cast iron with a flux added with Mg-alloy. The results follow : 1) The results were not so satisfactory as in gas welding, but by the fully preheated and deep cured welding, high strength of weld joint was obtained and additional annealing further ensured high toughness. 2) Such a welding core was excellent as Al-cast iron which included high contents of C, Si and Al, or nodular graphite cast iron with high C and Si contained. In order to have graphite spheroidized, flux was required to contain some Mg-alloy. 3) Certainly pre-heating was a necessity for welding and it is important to be very careful in controlling the welded parts. The problems of crack will be treated in following experiments.
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