溶接継手の気孔に関する研究(第 2 報) : 気孔検査についての考察

概要

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In order to analyze gases included in the porosity of welds of aluminium alloy, we formerly constructed an apparatus of gas analysis and investigated the relation between several welding conditions and results of gas analysis on the welds. In this paper, we report on a comparison of the results of several porosity inspections with the results of gas analysis on the welds. For porosity inspections, we have made codes of micrographic inspection and X-ray inspection. These codes are convenient for comparison of the results of gas analysis. We have obtained experimental results as following : 1) In precise inspection, it is necessary to use micrographic inspection together with X-ray inspection. 2) Gas contents mainly hydrogen included in welds of aluminium alloy (NP 5/6) are about 1-3ml/100g at 0 percentage void. 3) According to the observation of the distribution of pores of each size, microporosities (<0.1mm pore dia.) seem to be an important factor of the deterioration of mechanical properties of the welds.
社団法人溶接学会の論文
1960-11-25