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Successor
Volume 34, Issue 1-3
Displaying 1-6 of 6 articles from this issue
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The equilibrium measurement of the reaction, FeO(1)+CO=Fe(s)+CO2Koji Sanbongi1948 Volume 34 Issue 1-3 Pages 2-3
Published: 1948
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSIn continuation of the previous report, the author measured the equilibrium relation among molten iron okide, solid iron, and CO/CO2 mixed gas at the range of 1390°C-1490°C. From this result, the following e uation was obtained for the temperature function of Log K,
In addition, at the range of temperature, measuring the oxygen concentration of the iron oxide which coexist with iron and cornpared with the hitherto value. At the end, the temperature function of e uilibrium constans of the rcaction, FeO(1)+H2=Fe(s)+H2O, was calculated and obtained the following e uationView full abstractDownload PDF (795K) -
The equilibrium raeasurement of the reaction, Feo(1) +CO=Fe(l)+CO2Koji Sanbongi1948 Volume 34 Issue 1-3 Pages 4-8
Published: 1948
Released on J-STAGE: January 22, 2010
JOURNAL FREE ACCESSThe au hor measured the e uilib ium relation among mol en iron oxide, mol en i on, and CO/CO2 mixed gas at the range of 1530°C-1670°C.
From this result, the following equation was obtained for the temrerature function of Log K
In addition, the temperature function of oquilibrium conatant of the reaction, FeO(l)+H2=FeO(l)+H2O, was calculated and obtained the following equation:
At the end, from these results, the author corrected the hitherto co-temperature diagram and H2-Temperature diagram.View full abstractDownload PDF (350K) -
Harumi Nakamura1948 Volume 34 Issue 1-3 Pages 9-20
Published: 1948
Released on J-STAGE: January 22, 2010
JOURNAL FREE ACCESS"Banking" is the first treatment we have adopted in our country ever since the latter part or the end of the war
Thr reason why we resorted to it, of course attribuied to our complete defeat checking the china route through which we could hitherto have obtained lots of ore and coal.
"Banking" means essentially" to rivive "that is: to cuench the furnace fire as soon as possible so as to preserve "blank coke" charged as the heat source of the reviving operation and to take. every caution not to burn out the coke by draft.
The head of the charge and the amount of oxygen in the top-gas are two elements to show if the process is in good order.
If the coke won't burn, the charge never gets lower and oxygen in the top-gas increases.
The fire in the furnace be cuenched and the coke, heat souece of the reviving operation, not consumed, and the opertaion, we can say suffers from no restriction of time.
In order to make the reviving operation easy and sure, there is a method of making a hollow space from the tapping hole to the hearth and the connecting tunnels between the hole and the tuyers above it, as shown in the picture.
This is not a mere paper argumen but the fact are reached at the actual reviving operation in banking of the blast furnace No 2 at Hirohata Works.View full abstractDownload PDF (687K) -
[in Japanese], [in Japanese]1948 Volume 34 Issue 1-3 Pages 21-22
Published: 1948
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSThis alloy consists mainly of three principal elements, namely iron, carbon and aluminium. The magnetic properties and the conditions for the heat treatment have been systimatically investigated for the simple ternary alloys, for the alloys with additions of other elements. The variation of magnetic properties and the optimum heat treatment with the compositions are given in a series of diagram.View full abstractDownload PDF (133K) -
Tokushichi Mishima, Tetsutaro Mitsuhashi1948 Volume 34 Issue 1-3 Pages 22-23
Published: 1948
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESS(1) This investigation is concerning to the spark decrement of the 18-4-1 type high speed steel by the addition of cobalt, which are studied by powder spark test.
(2) The cause of the spear point phenomena, which appears in the molybdenum and vanadium bearing steels are discussed.
(3) Some investigations on the spark of molten pig and molten steel are too described.View full abstractDownload PDF (131K) -
Tokusaburo Takashima1948 Volume 34 Issue 1-3 Pages 24-27
Published: 1948
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSAs the content of arsenic in common steel increased during the war, the present investigation was set about as a counter-plan for it feeling anxious for the unfavorable influence of it on high grade structural steel.
The three kinds of steels, such as carbon steel, Si-Mn-Cr steel and Cr-W steel were tested by adding 1.0% As in maximum to each of them.
As the result of test, yield point, tensile strength and hardness increased with an increase of As content, while, elongation, reduction of area and impact value decreased conve sely.
In all of these steels, as the result of inspection on the influene of arsenic in case 1.0% As was contained, the followig results were obtained: yield point increased by 15-20%, tensile strength and hardness respectively by about 10%, while, elongation desrersed by 2-15%, reduction of area by 20-30% and impact value by 50-70%. Generally, less influence was observed in special steel than in carbon steel.
Microscopical structure became ununiform with an increase of a senic, but no change was observed especially in structure.
The structure of a broken section grew worse with an increase of arsenic con ent.
Almost any influence of As was not observed in Austenite grain size.View full abstractDownload PDF (275K)
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