All issues
Volume 1953 (1953)
- Issue 9 Pages 3-
- Issue 8 Pages 5-
- Issue 7 Pages 3-
- Issue 6 Pages 3-
Volume 1953, Issue 7
Displaying 1-18 of 18 articles from this issue
- |<
- <
- 1
- >
- >|
-
AKIRA NAKAYAMA1953 Volume 1953 Issue 7 Pages 3-7
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSDownload PDF (988K) -
TOMONORI NAKANO1953 Volume 1953 Issue 7 Pages 8-9
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSDownload PDF (562K) -
TOMOYOSHI KAWADA1953 Volume 1953 Issue 7 Pages 10-11
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSDownload PDF (599K) -
OTOKOMA SHIMADA1953 Volume 1953 Issue 7 Pages 12-19
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSDownload PDF (1940K) -
EFFECTS OF PREHEATING TEMPERATURE AND IRON CONTENTNAMIO KAWASHIMA, YUZO NAKAMURA1953 Volume 1953 Issue 7 Pages 20-28
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSSynopsis
It was previously reported that a remarkable grain growth and "Orang Peel" by deep drawing take place in the annealed sheet of 3S alloy rolled from un-preheated slab, but the preheating of slab is very effective to prevent these unfavourable defects.
In this paper, the authors further investigated the effects of preheating temperature and iron content on the grain size and the mechanical properties of 3S sheet.
It was found that the very fine grain could be obtained by the final annealing at 450°C in air furnace if its slab were preheated at 550°C or 575°C for 24 hours, but it is not necessary to preheat at higher temperature such as 600°C. When it was preheated at 625°, the more striking grain growth took place rather than that in the case of un-preheated slab.
Furthermore, it was ascertained that the final annealing of 3S sheet rolled from preheated slab should be carried out at higher temperature than 450°C in order to get the finer grain when its content of iron is low as 0.2%.
On the other hand, when its content is comparatively high as 0.6%, its grain became to be fine even at 350°C and very fine at 400-450°C corresponding to the fine grain of 2S sheet.View full abstractDownload PDF (2908K) -
NAMIO KAWASHIMA, YUZO NAKAMURA1953 Volume 1953 Issue 7 Pages 29-36
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSSynopsis.
It has been said since 18 gears ago that the highest purity altminum such as 99.998% should be recrystallized eyen at room tcmperature. The authors read in a paper on this problem at the Tokyo meeting of the Japan instjtute of Metals held last spring. In this studies it was found that a self-annealing phenomenon locally took place with the aluminum of ovcr 99.996% purity during heavy rolling. Futhermore, it was ascertained by means of X-ray analysis that even the specimen of rolled condition not yet recrystallized began to recrystallize after 40 day's aging at room tempcrature. However, it was very difficult to find out a new recrystallized grain by ordinary microscopic examination.
So it is assumed the short line spots on the Debye arcs of Laue pattern, to be considered as the begining of recrystallization, should be taken as polygonization and not as ordinary nucleation.
Further, the authors investigated again the recrystallization phenomenon of the highest purity aluminum by means of X-ray analysis and microscopic examination to ascertain at what temperature the nucleation might take place. And the effect of aging on the recrystallization phenomenon of the highest parity aluminum was also looked into after 17 months aging. It was found out that the temperature of nucleation with the highest purity aluminum was respectively 100-110°C and l70-180°C at the reduction rate of 90% and 60%. And it was also ascertained that the highest purlty aluminum af less than 99.994% purity aluminum of 90% reduction was nucleated after 17 months' aging at room temperature, and that the aluminum of less than 99.994% purity did not show any recrystallization phenomenon after the same aging period.View full abstractDownload PDF (3036K) -
TAKASHI IKENO, TEIZO YOKOMOTO, OSAMU NOHARA1953 Volume 1953 Issue 7 Pages 37-43
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThe higher the heating temperature of slab ingots, the higher the recrystallization temperature becomes moreover the finer perceptively the grain size becomes. On the other hand, grains recrystallized become more isotropic according to the hot rolling temperature. It is thought that the distributing conditions of two phase compounds may confer the principal influence to recrystallization process, i.e. crystal nucleus or growth phenomenon.View full abstractDownload PDF (1754K) -
RIHEI KAWACHI1953 Volume 1953 Issue 7 Pages 44-50
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSComparison of the corrosion resistance of 61S and AW10 alloy which are used as the heat-treatable Al alloys for marine service in America and England respectivly, and the influence of addition of Cu or Zn up to about 0.5% each on them were examined. The The tensile tests on the 1mm thick specimens which were heat-treated to "O" "T4" "T6" conditions were done befor and after the corrosion tests namely, accelerated corrosion method, immersion in polluted sea-water, or stress corrosion. Results obtained are as follows,
(i) The difference of the performance of 61S and AW10 alloys are so small that we can not determine which is superior than another.
(ii) Corrosion resistance of these alloys are decreased with copper content, and the degree of deteriorous effect of copper on AW10 is greater than on 61S.
(iii) On the effects of zinc, we can say, they are negrigibly small
(iv) The effect of Cr(0.25%) in 61S and Mn(0.7%) in AW10 are very similar, both in crease the tensile strength and improve the resistivity against stress corrosion of "T6" condition.
By such results, the present author believes that it may be allowed to increase to some degree of the upper limits of Cu and Zn in the Lloyds specification and may be desirous to set the lower limit of Mn content in that.View full abstractDownload PDF (774K) -
1953 Volume 1953 Issue 7 Pages 50
Published: 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSDownload PDF (96K) -
ESPECIALLY ABOUT THOSE OF 52S ALLOYSHIROMITSU HARIMOTO, KATSUZO MIZUNO1953 Volume 1953 Issue 7 Pages 51-54
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSIn the first report, one of the authors, H. Harimoto reported the electro-chemical properties of Al-Mg alloys. (Light metals No. 3, 1952-V) We measured the electro-solutional pressure of samples, various contents of Mg in Al, by new designed vaccum-tube potentiometer. Then researched the relation between the electro-solutional pressure and the quantity of corrosion.
We studied the electro-chemical properties of 52S alloys and reported the following results in this paper. Samples, Mg 2.5% in Al, were heated at 100°, 200°, 300°, 400°, 500°, 550°C. After treatment, the samples (cathode) and Pt (anode) were dipped in the electrolytes of 3%NaCl and 0.1%HCl, respectively. Then the intensity of current were measured by milliammeter and oscillograph.
Similarly we measured about reduction 40%, 70%, 90% of the same samples respectively. More these samples, immediately after polishing, after one week, after four weeks, were measured.
Conclusion
In an instant of dipping electrode, the intensity of current rose up and indicated max. Value after 0.1 x several seconds. Then inclined to decrease for a short time and at last became in the equilibrium states.
We considered that those results were due to the polarization.View full abstractDownload PDF (378K) -
GORO ITO1953 Volume 1953 Issue 7 Pages 55-58
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThe NaCl single electrode potential of aluminium refered to IN calomel cell in NaCl aquores solution as affected by its surface condition was studied by specially made vacume tube potentio meter (fig. 1). Potential of aluminium varies largely by its surface treatment. The potential of aluminium with its natural oxide film is nobler then the case when its film was removed by special treatment as electrolytic polishing in acetic unhydrat and perchloric acid bath. The specimen with no oxide film show special corrosion behavior in acid and alkali solution as shown in fig. 4. But its oxide film groth rapidly when the specimen was dried or immersed in mater which contains oxygen.View full abstractDownload PDF (527K) -
TAKASHI KUNIMOTO, EIZO IKEDA, HIROSHI NISHIMURA1953 Volume 1953 Issue 7 Pages 59-65
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSWe found that the aluminum surface was blackened in the boiling natural-water. Then, we examined the condition in which this discolouration occurred. As the experiments, aluminum and its alloys (1S, 2S, 52S, 61S, 17S) which were variously treated were boiled in the well-water, the distillated water and the well-water which was controlled PH. Table 1-11 and Photo. 1-11 show the results of these experiments. Summarizing these results, we have determined the conditions in which the discolouration occurres as follows.
(1) There should be neither oxid film nor other films which prevent the direct contact of the water on the aluminum surface before boiling in the natural water.
(2) Thc Tcmperature of water should be more than 80°C and the aluminum surface should be laid in the condition in which the oxid film is formed.
(3) The water should have any metallic ions and these ions should be in the condition in which they are able to act sufficiently.
The discolouration above mentioned seems to illustrate one of the delicate action of bare aluminum surface and to give us the kye with which we may be able to unlock the tightly closed door of the aluminum surface problems, for instance, activity and oxidation of aluminum surface and corrosion resistance of aluminum and its alloys, etc.View full abstractDownload PDF (2089K) -
EFECT OF VOLTAGE AND CONCENTRATION OF ELECTROLYTE IN ALTERNATING CURRENT SULPHURIC ACID PROCESSTAKASHI KUNIMOTO, EIZO IKEDA, HIROSHI NISHIMURA1953 Volume 1953 Issue 7 Pages 66-72,58
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSIn the Part 1, Part 3 of this report, we discussed the effects of working-condition in direct current sulphuric acid process. Now, we shall develop our experiments into the region of alternating current sulphuric acid process. In this part, we report the effects of voltage and concentration of electrolyte. In this experiments, the current is A. C. only and the factors not examined are held in constant, i. e., temperature is 15±1°C. and time is 40 minutes. The inspection metrods for the properties of oxid film are themethods specified in JIS P 10431, 1951, which were used in the preceding experiments.
The results of experiments are as follows.
(1) The relation between thickness of film and voltage and concentration is shown by following experimental formula. (See Fig. 3, Fig. 4, Fig. 5, and Table 1.) T=1.6e(0.0052c0.829+0.032)v [10<C<30 10<V<20 Time:40mins.] T=Thickness(μ)C=Concentration(%) V=Voltage(V)
(2) The relation between thickness of film and electric power is shown by following experimental formula. (See Fig. 6) T=1.8+0.35W/40mins. (10<V<20 0.5<A/dm2<1.8 Time:40mins.) W=A/dm2×V
(3) The relation between corrosion resistance and voltage and concentration is shown by following experimental formula formula. (See Fig. 7, Fig. 8, Fig. 9, Fig. 10 and Table 2.) S=(852e0.030c)e0.075v [10<C<25 10<V<20 Time:40mins.] S=Corrosion Resistance (Sec.)
(4) The relation between thickness of film and corrosion resistance is shown by following experimental formula. (see Fig, 11.) S=17.7T0.633-10 [3<T<15]
(5) The relation between abrasion resistance and voltage and concentration is shown by following experimental formula. (See Fig. 12, Fig. 13, Fig. 14 and Table 3.) A=3.0e(0.127+0.049c)v [10<C<30 10<V<20 Time: 40mins.] A=Abrasion Resistance (sec.)
(6) The relation between abrasion resistance and thickness of film is shown by following experimental formula. (See Fig. 16.) A=30T-100 [3<T<15]
(7) The relation between abrasion resistance and electric power is shown by following experimental formura. (See Fig. 16.) A=10W-50 [10<V<20 0.5<A/dm2<1.8 Time:40mins.]
(8) Specific abrasion resistances (abrasion resistance for unit thickness of film) are less than 1/2 of D. C. process. And then, maximum values of them change their place toward the dilute side of concentration as voltage rises. (See Fig. 15.)View full abstractDownload PDF (845K) -
TOJIRO KOBAYASHI, KENJI SAKAGAMI1953 Volume 1953 Issue 7 Pages 73-75,82
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSIn recent time, aluminum and its alloy are being made use for the train or the building. In this case, as corrosion resistance of the material to urine is required for inside wall of toillet. we tried the corrosion test extending over one year. The result of our test, 2S 3S and 52S had little corrosion attack, we get the conclusion from our test of this term, which these material will be no trouble to make use of practical use.View full abstractDownload PDF (1041K) -
TOJIRO KOBAYASHI, KIYOSHI WAKE1953 Volume 1953 Issue 7 Pages 76-82
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSAfter welding miscellaneous aluminum alloys (3S, 52S, 24S and 61S) with the argon are welding machine (15KW. max. 800amp.) made by Miller Co., Ltd., U. S. A., we are going to report the experimental results; the differences of mechanical properties, structure and strain affected by heat in Welded part between argon are welding and oxy-acetylene gas welding.View full abstractDownload PDF (1763K) -
KAWASAKI HEAVY INDUSTRY CO.1953 Volume 1953 Issue 7 Pages 83-89
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThe Report states about following items:
1 Experimental methods
(1) Welding methods. a. Innert gas welding b. Electric arc welding c. Gas welding d. Low temperature welding
(2) Samples a. Sheet b. Welding rods
(3) Size and shape of shape of samples
(4) Welding condition a. Innert gas welding b. Electric arc welding c. Gas welding d. Low temperature welding
(5) Machanical Tests a. Tension test b. Bending test. c. Hardness test
(6) Corrosion test
(7) Welding cost and comparative tests of welding operation
2 Expcrimental Results
(1) Tension test
(2) Bending test
(3) Hardness test
(4) Corrosion test
(5) Cost
3 Some consideration of results
4 ConclusionView full abstractDownload PDF (650K) -
The Committee Of Light Metals For Shipbuilding Ind1953 Volume 1953 Issue 7 Pages 90-96
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThis paper contains following items: Introduction
I Marking
II Shearing and Cutting (1) Machine Shearing (2) Gas Cutting. etc
III Boring (1) Punching (2) Drilling
IIII Roller Bending and Staightening (1) Staightening (2) Bending
V Hydraulic Press Working and Bending (1) Sheet edge Bending (2) Sheet Bending (3) Hot Sheet Bending (4) Joggling (5) Bending of profil (section) (6) Staightening
VI Riveting (1) Rivet (2) Rivet Joint (3) Riveting
VII Caulking
VIII Packing
XI Coating (1) Ground Treatment (2) Under Coating (3) Final Coating (4) Joint treatment (5) Contact parts of different metal
X Welding (1) Electric arc Welding (2) Gas Welding (Oxygen-acetilene Gas Welding) (3) Innert Gas Electric Arc WeldingView full abstractDownload PDF (851K) -
TAKAO TAKADA1953 Volume 1953 Issue 7 Pages 97-98
Published: May 31, 1953
Released on J-STAGE: October 30, 2008
JOURNAL FREE ACCESSThis paper contains as follows
1. Main requirements of tank car
2. Construction of tank
(1) Tank body
(2) Tubing
(3) OthersView full abstractDownload PDF (160K)
- |<
- <
- 1
- >
- >|