Development of a Blow-hole Gas Analyzer and Its Application

Abstract

A new apparatus to determine the composition of gas in blow-holes in steel has been developed. A steel specimen is pierced in a vacuum vessel by means of a drill which is driven by a motor placed outside the vessel. The vacuum vessel is directly connected with a quadrupole mass spectrometer which analyzes the released gas from blow-holes.
It is demonstrated that analysis of the gas in cavities in steel can be made with this new apparatus and the obtained results may provide the information useful for the assessment to the gas composition at higher temperatures.