JOURNAL OF THE JAPAN WELDING SOCIETY
Online ISSN : 1883-7204
Print ISSN : 0021-4787
ISSN-L : 0021-4787
Volume 19, Issue 4-5
Displaying 1-6 of 6 articles from this issue
  • M. Okada, H. Kihara, S. Onimaru, Y. Wakabayashi
    1950 Volume 19 Issue 4-5 Pages 90-95
    Published: 1950
    Released on J-STAGE: June 12, 2009
    JOURNAL FREE ACCESS
    Decarburization of welded parts was usually observed when steels were butt-jointed in flash butt welding. A preventive method, that is, shielding the welding joint with argon gas proved unsuccessful so far, probably owing to the impurities of gas used and defects of the gas supplying apparatus. However, as a result of further experiments, transformer oil was used for avoiding the effect of oxygen in the air. By using this oil in a series of experiments the prevention of decarburization proved successful under specified conditions.
    Throughout the above experiments, high carbon steel rods of small diameter were used for the butt-joint with a Daiden flash butt welder.
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  • Relations between Non-Metallic Inclusions and Micro-Fissures
    Kinsaku Nakane, Seiichi Ando
    1950 Volume 19 Issue 4-5 Pages 96-100
    Published: 1950
    Released on J-STAGE: June 12, 2009
    JOURNAL FREE ACCESS
    In order to investigate the cause of micro-fissures, the authors analysed non-metallic inclusions in deposit metals by an electrical analysis method as well as by a general chemical analysis of 5 elements. From the experimental results, it has been made clear that solid SiO2 and silicate as FeO. SiO2., contribute toward the development of micro-fissures and detrimental effects of S due to the lower content increases this cracking tendency.
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  • Preliminary Examination on Reiations between Contents of Mrnganese and Silicon and Properties of Weld deposited by Arc-Welding
    Harujiro Sekiguchi, Seiichi Ando, Koichi Nakamnra
    1950 Volume 19 Issue 4-5 Pages 101-108
    Published: 1950
    Released on J-STAGE: June 12, 2009
    JOURNAL FREE ACCESS
    1) As. expected in the first report, when the points showing the composition of welding core rods. are in the field II of the diagram (Fig. 5) of deoxidation with manganese and silicon, the following results are obtained.
    (a) The weld steels deposited by them are denser and the mechanical properties (especially elongation) are more excellent than others deposited by the core rods whose composition-points are in the field I of the diagrrm.
    (b) The higher the contents of manganese and silicon are, or the higher the silicon contents are under the constant manganese, the denser are the weld steels deposited by them and the more excellent the ultimate strengths and elongations
    2) Even though the points showing the compositions of the welding core rods are in the field II of the diagram, when the contents of manganese and silicon are excessively high, there is a tendency for the ultimate strengths of the weld steels deposited by them in certain conditions to become lower.
    3) When steel core rods containing manganese and silicon are used, the coating must be free from calcium fluoride to., obtain the bead having no small hole which opens at the surface.
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  • M. Okada, H. Kihara, Y. Arata, H. Kawai
    1950 Volume 19 Issue 4-5 Pages 109-115
    Published: 1950
    Released on J-STAGE: June 12, 2009
    JOURNAL FREE ACCESS
    In order to find out a good flux for submerged arc welding, various expeniments were executed, and following results are obtained.
    (1) For the welding, the most suitable melting point of the flux was about 1, 350°C and the specific gravity was 4.5.
    (2) According to the result of the mechanical tests, the flux is applicable to practice.
    (3) The welding current showed the most satisfactory effect at 900-1, 000A and finenese of powder was most favorable at 20-50. mesh.
    (4) An electrode contained high manganese was more effective.
    (5) The moisture in the flux must be removed as for as possible.
    (6) A backing was used on account of prevention of metal-flow.
    (7) The flux made from mineral untreated. was not satisfcatory in mechanical tests, so it was remained for a future research.
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  • [in Japanese]
    1950 Volume 19 Issue 4-5 Pages 116-119
    Published: 1950
    Released on J-STAGE: June 12, 2009
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1950 Volume 19 Issue 4-5 Pages 119-122
    Published: 1950
    Released on J-STAGE: June 12, 2009
    JOURNAL FREE ACCESS
    Download PDF (296K)
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