Tetsu-to-Hagane

[title in Japanese]

[in Japanese]

1936 Volume 22 Issue 8 Pages 589-592
Published: August 25, 1936
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_589

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IMPROVEMENT OF SPRING STEEL LEAVES FOR RAILWAY ROLLING STOCK.

H Yoshizawa

1936 Volume 22 Issue 8 Pages 592-596
Published: August 25, 1936
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_592

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In the works of our Government Railway Department, there has been spent much cost for repairing springs, and many improvements have been made in this field, but it seems that there are still more things to be considered. To keep the springs in the better conditions means the safety of the railway rolling stocks, and so we must exert ourselves to investigate the conditions of the springs which are in work on the rolling stocks at present.
For this reason, decrease of thickness, depth of decarburization and carbon content of the spring leaves used in our goods cars were studied, and we found that a spring leaf which contain less than 0·6% of carbon and can not be hardened in oil quenching, amounts 30% of all spring leaves, and a spring leaf which thickness is decreased more than 10%, amounts 5% of all spring leaves, but the latter will be contained in the former. From this result, we obtained an improving rule to keep the springs in the better conditions.

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[title in Japanese]

[in Japanese]

1936 Volume 22 Issue 8 Pages 597-622
Published: August 25, 1936
Released on J-STAGE: January 22, 2010

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_597

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The constituent of the whole ternary system copper-aluminium-silicon were considered. No ternary intermetallic compound is observed and 15 definite constituents which have. been determined in each binary system were also found to occur in this ternary system. There exist 11 surfaces of the primary separation, and 8 invariant points on the liquidus surface; among them 2 points are ternary eutectic, 1 point ternary peritectic, and 5 points peritecto-eutectic. Both the β phases of the Cu-Si and Cu-Al system are completely soluble in all proportions in the ternary system, and it decomposes into α+γt; the univariant reaction line of this decomposition has a minimum point at about 500°C. 2 invariant reactions in solid state, γ_t+γ_s χ+α, γt+χ α+ε_s", are found to exlst at 675° and 495°C. Five invariant reactions; γt+ε_2a δ+Si, ε_2a δ+ζ₁+Si, ζ₁ δ+ζ₂+Si, ε_2a+η₁ ζ₁+Si, ζ₁+η₁ ζ₂+Si and two ternary polymorphic changes due to the η₁ η₂ phases, take place almost the same temperatures as in the binary Cu-Al system. Four ternary polymorphic changes due to the ε_s ε_s' and ε_s' ε_s" take place at 600° γt+ε_s S_s'+X, 550°γt+ε_s' ε_s"+X, 585°γt+ε_s ε_s'+Si, and 525°γt+ε_s' ε_s"+Si respectively. The limit of solubility of silicon and aluminium in Solid copper has been also determined.

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X-RAY STUDY OF THE ALUMINIUM-ZINC SYSTEM

Ichiji Obinata, Masami Hagiya, Sigeyuki Itimura

1936 Volume 22 Issue 8 Pages 622-629
Published: August 25, 1936
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_622

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The Al-Zn alloys covering the range of the β and the γ field have been studied roentgenographically with both ordinary and precision cameras, with which the powder photograms of the alloys have been taken not only at room-temperatures but also directly at high temperatures.
From the lattice constant-concentration curves obtained, it is confirmed that the β phase is merely a continuation of the γ phase; the solid solubility of zinc in the latter phase has been determined.
By adding a small amount of Mg in the alloy, the intermediate stages during the decomposition of quenched β due to aging h ave been studied. The results showed that the eutectoid-transformation of the β phas e is simply a process of decomposition into a and y, which are in the equilibrium concentration, and that no intermediate metastable phase exists during the process. It should be noticed, however, that the lattice constant of quenched β decreases anomalously during aging and that the complete decomposition of the said phase is hardly attainable at ordinary temperature. The complicated changes in physical properties of the quenched alloys due to aging have been explained crystallographically.

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[title in Japanese]

1936 Volume 22 Issue 8 Pages 630-644
Published: August 25, 1936
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_630

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[title in Japanese]

1936 Volume 22 Issue 8 Pages 645-659
Published: August 25, 1936
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_645

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[title in Japanese]

1936 Volume 22 Issue 8 Pages 660-661
Published: August 25, 1936
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_660

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[title in Japanese]

1936 Volume 22 Issue 8 Pages 663-676
Published: August 25, 1936
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_663

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Erratum to : NATURE OF PIG IRON.

1936 Volume 22 Issue 8 Pages e1
Published: 1936
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_e1

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[title in Japanese]

1936 Volume 22 Issue 8 Pages a1-a49
Published: August 25, 1936
Released on J-STAGE: July 09, 2009

DOIhttps://doi.org/10.2355/tetsutohagane1915.22.8_a1

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