真空抽出式拡散性水素測定装置の開発 : JIS 拡散性水素試片からの水素放出挙動の検討

概要

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A new apparatus for determing the diffusible hydrogen in weld metals was developed, (Vacuumextraction Method). This method is based on the principle that the diffusible hydrogen evolved from weld metals in a closed evacuated vessel is concentrated, by means of a Toepler pump, into the measuring unit and its gas volume is accurately measured. Hydrogen evolution from JIS type specimens was calculated by using the solution of one-dimensional diffusion model for the movement of hydrogen in uniform metals. Experimental results of hydrogen evolution by using the Vaccum-extraction method agree approximetely with the calculated values. An apparent diffusion coefficient of hydrogen in the welded mild steel (SS41) at a room temperature of 20℃, D=1.06×(10)^<-6> (cm)^2/sec was obtained from an analysis of the evolution curve of hydrogen from the weld metal.
社団法人溶接学会の論文
1980-11-05