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Volume 23, Issue 11
Displaying 1-9 of 9 articles from this issue
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Tetuo Ogii1937 Volume 23 Issue 11 Pages 1053-1057
Published: November 25, 1937
Released on J-STAGE: January 22, 2010
JOURNAL FREE ACCESSIn this report, the author discusses on the activity of oxygen in molten iron under the condition of saturated or unsaturated solution, and determines the free energy change in the reaction of Fe(1)+1/2O2 FeO(1), using Chipman's data.View full abstractDownload PDF (329K) -
Kuniichi Tawara1937 Volume 23 Issue 11 Pages 1058-1062
Published: November 25, 1937
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSThe purposes of the 19th Sectional Committee (Special Steel Material Section) of the Japan Society for the Promotion of Scientific Research are in the investigation and study of causes of defects which occur in special steel materials and also of methods of preventing such defects. In order to accomplish the objects, special care should be taken for the heating and cooling of the steel materials and their forging operations. The Sectional Committee has first examined the forging operation, and found that the names of various operations employed in different works in Japan and the methods of representing the forging ratio are varied. After careful investigation and study, those which are used in comparatively large number of the works have been adopted, and a method of representation has been established. The results are herein published. It is desired that the works in general will accept the recommendations of the Committee.View full abstractDownload PDF (240K) -
Asajiro Tagawa1937 Volume 23 Issue 11 Pages 1063-1084
Published: November 25, 1937
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSA piston rod made of nickel-chrome steel for the 4, 800H.P. Gas blowing engine, manufactured by the foreign works was fractured. Investigating the cause of failure, the Corrosion fatigue due to cooling water was found to be an important factor.
Therefore, series of fatigue tests on the fractured material and also on carbon steels with a tensile strength of about 60kg/mmmm2 were carried out with special care to the corrosion fatigue, the conclusions are as follow;-
1. The carbon steel is sufficiently good as a material for the piston rod.
2. The degree of forging increases the resistance to corrosion fatigue.
3. By using emulsion oil as a cooling medium, the corrosion fatigue can be prevented to a certain extent.View full abstractDownload PDF (13168K) -
Kenzo Inamura, Hidekichi Ohashi1937 Volume 23 Issue 11 Pages 1085-1091
Published: November 25, 1937
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSThe present work was undertaken with the purpose of finding the more excellent alloys than Beryllium-Bronze containing 2-3% of beryllium. In this paper, the experimental results on Cu-Ni-Be alloys are dealt with. Among the alloys in the ranges of contents of 2-10% Ni and 0·2-2% Be, the alloy containing 2% Ni and 0·5% Be was found to have a very high tensile strength and electric conductivity when suitably heat-treatmented. In order to improve the propertics of this alloy, the effects of the addition of iron or chromium were investigated, and final'y, a very excellent alloy "Berychrome No. 1" was obtained, which standard composition is 2% Ni, 0·5% Be, 05% Cr, other elements less than 0·5%, and the remainder Cu. The mechanical properties of this alloy are shown in the following table.
Mechanical Properties of "Beryehrome No. 1."
This alloy has a slightly low tensile strength and hardnees than those of Beryllium-Bronze, but the elongation and electric conductivity are higher than those of the father.View full abstractDownload PDF (1117K) -
CHANGE IN STRUCTURE DUE TO THE TRANSFORMATIONIchiji Obinata, Mikio Hayashi1937 Volume 23 Issue 11 Pages 1092-1099
Published: November 25, 1937
Released on J-STAGE: January 22, 2010
JOURNAL FREE ACCESSIn the preceeding papers (Mem. Ryojun Coll. Eng., 2, 1929, 205, 3, 1930, 87.3, 1931, 285 and 295.), one of the present writers pointed out, that the intermediate metastab'e phase β' exists during the course of the eutectoid-transformation of this alloy.
Thereafter, the existence of another metastable phase β1, was additionaly detected by Wassermann in the same alloy.
In the present paper, the crystal structure of various phases taking part in the said transformation is re-examined, and the change in structure due to the transformation is studied by means of X-ray, electrical resistivity and microscopic methods. Using the "Vacuumheitztisch nach Esser", the alloy containing 12·66% of Al is heated or cooled rapidly under the microscope, and the change in microstructure due to the metastable transformation β1 β', was photographed with a cinekodak on 16-mm. film. From the micro-cinema thus obtained, it is found that the well-known needle structure of the quenched alloys grows at first at about 300°C on cooling and disappears gradually at about 410°C on re-heating, and further that the needle itself has no phasic meaning; it would probablly be regarded as beeing due to the slip or shear of the lattice plane.View full abstractDownload PDF (3031K) -
1937 Volume 23 Issue 11 Pages 1100-1114
Published: November 25, 1937
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSDownload PDF (1510K) -
1937 Volume 23 Issue 11 Pages 1115-1124
Published: November 25, 1937
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSDownload PDF (976K) -
1937 Volume 23 Issue 11 Pages 1125-1127
Published: November 25, 1937
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSDownload PDF (319K) -
1937 Volume 23 Issue 11 Pages 1156-1162
Published: November 25, 1937
Released on J-STAGE: July 09, 2009
JOURNAL FREE ACCESSDownload PDF (644K)
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