Tetsu-to-Hagane

APPLICATION OF RAW DOLOMITE TO BASIC OPEN HEARTH BOTTOM

Hachizo Kondo, Heishiro Morikawa

1948 Volume 34 Issue 9 Pages 1-2
Published: September 25, 1948
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_1

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The use of raw dolomite "famming in" bottom for basic open hearth furnace has not been consideyed seriously hitherto. Provided that the surface is sintered to a certain extent, it is just as good as the dolomite clinker bottom. It withstands well the violent oxidizing boil in refining. It is not necessary to take heed to slaking properties for the cooling off of furnace for a long period. It's structure consists of following as:-periclase, olivineforsterite, diopsite and others.

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ON THE MELTINIG POWER OF HEROULT TYPE ELECTRIC ARC FARNACE

M. Nakamura

1948 Volume 34 Issue 9 Pages 2-4
Published: September 25, 1948
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_2

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On the melting power of Heroult type electric arc furnace, I think we can classif it into three parts as follows.
(1) Heat absorbeb in the Molten metal. (2) Heat radiated through refractory materials of farnac (3) Heat absorbed in refractory materials of furnace.
hrefore we can show above by a simple linear equation.
hat is: W=h₁M+h₂T+h₃ Where h₁h₂ and h₃ are constants. M……Weight of charge. T……Melting time. W……Melting power.

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[title in Japanese]

[in Japanese]

1948 Volume 34 Issue 9 Pages 4-6
Published: September 25, 1948
Released on J-STAGE: March 08, 2010

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_4

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INFLUENCE OF Sn UPON THE GRARHITIZATION IN CAST IRON

Hiroshi Sawamura, Teiichi Suzumoto, Tsurayuki Kawaguchi

1948 Volume 34 Issue 9 Pages 7-9
Published: September 25, 1948
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_7

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Sn retards the graphitization in cast iron which occurs during solidification. fayours, however, the graphitization of free cementite in white cast iron.

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A STUDY ON OIL SAND (Report 2)

Shizuya Maekawa

1948 Volume 34 Issue 9 Pages 10-12
Published: September 25, 1948
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_10

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The author studied on the preservability of semi stale seed oil sand. The outline of experiment is as follows:
1. Strength of oil sand before drying decreases for 2-4 days but raises again afterward.
2. The effect of mixture is negligible.
3. Quality degraded by dropped room temperature can be revived by re-drying.

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SEVERAL RESEARCHES INTO SILCOME STEEL (2nd Report)

N. Yamanaka, K. Kato

1948 Volume 34 Issue 9 Pages 12-15
Published: September 25, 1948
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_12

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Succeding to the first report, influences of various elements, C, Mo, W, Ni etc., on the sectional diagrams of Fe-C-Cr-Si series were studied. According to our results, C and Ni widen γ-region but Mo and W narrow γ-loop region. Therefore, the chemical composition of silcrome steel must be adjusted so as to lie in γ-loop according to our sectional diagrams.

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SEVERAL RESEARCHES INTO SILCROME STEEL (3rd Report)

N. Yamanaka, K. Kato

1948 Volume 34 Issue 9 Pages 15-17_1
Published: September 25, 1948
Released on J-STAGE: January 22, 2010

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_15

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The relations between the mechanical properties and the sectional diagrams decided authors were researched. Besides, the short time tensile test at high temperature, resistance to idation and the effect of long period of reheating on this steel were also studied.

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COMPARISON OF THE CUTTING ENDURANCE IN THE VARIOUS HIGH SPEED STEEL

Sadao Koshiba

1948 Volume 34 Issue 9 Pages 18-19
Published: September 25, 1948
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_18

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The author carried out a series of experiments with seven varieties of high spe steel, namely low tungsten steel, low tungsten-molybden-vanadium steel and high chromium stet and studied changes in their hardness and cutting durability brought about by different heat treatment As the results of his experiment, there are ascertained that the steel containing W5-6%, Mo1·5-3%, V2·5-3·0% are most superior in cutting durability to other steels at 1260° of quenching temperatur and cutting durability of low tungsten steel containing 11% W are highest at 1300° near, and the high chromium steel containing Cr7-9%, Si1.5-2.5% are inferior to any other high speed steer

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[title in Japanese]

[in Japanese]

1948 Volume 34 Issue 9 Pages 20-22
Published: September 25, 1948
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_20

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[title in Japanese]

1948 Volume 34 Issue 9 Pages 23-25
Published: September 25, 1948
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.34.9_23

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