抄録
The author studied the vacuum extraction method for the estimation of hydrogen in iron and steel. Utilizing this method, he investigated the variation of the quantity of hydrogen in the course of steel-making operations and the method for the reduction of hydrogen, which are outlined below:-
(1) It is demonstrated that the vacuum extraction at 800°C is the most suitable for the estimation of hydrogen, and further the sampling method of specimens for the accurate analysis is dealt with in detail.
(2) The variation of hydrogen and other elements in various stages of steel-melting operations, and the means for the reduction of hydrogen are explained.
(3) The relation of the hydrogen in steel in the course of melting with that in slag is investigated, and the mechanism of intrusion of the hydrogen is studied.
(4) Analysing the hydrogen contents in ingots and forged materials, the reduction of hydrogen due to the heat treatment is explained.
