巻号一覧
29 巻, 5 号
選択された号の論文の6件中1～6を表示しています
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F.W. Davis, E.B. LaVelle1960 年 29 巻 5 号 p. 382-392
発行日: 1960/05/25
公開日: 2009/06/12
ジャーナル フリーPDF形式でダウンロード (14454K) -
中村 孝, 浜崎 正信1960 年 29 巻 5 号 p. 393-395
発行日: 1960/05/25
公開日: 2009/06/12
ジャーナル フリーProjection welding has many effective applications because of the special features. In multiple projection welding, however, we have experienced that the welds have often low strength and are unstable. We observed, the lack of stability of weld strength happens in case of the narrow distance between projections and projection nuggets move to gather at the faying surface. We found, this phenomenon depends upon the "Pinch effect" that is, the electromagnetic contraction between the same directional current through the molten metal, so the movement of nuggets on the multiple projection welding closely relates to the distance between projections, mass of moving parts and electrode force, and consequently, the quick follow-up of electrode results the high strength and good stability.抄録全体を表示PDF形式でダウンロード (4382K) -
送給ガスの酸素混合率と溶着鋼生成スラグの化学組成との関係益本 功1960 年 29 巻 5 号 p. 396-401
発行日: 1960/05/25
公開日: 2009/06/12
ジャーナル フリーThe purpose of this research is to investigate the chemical reactions in the weld metal with the CO2-O2 arc welding. Many kinds of weld metal and slag by the CO2-O2 arc welding were analysed chemically, changing the rate of oxygen mixed in supplied gas.
In this first report the author describes the method of the experiment and the results showing relations between the rate of oxygen mixed in supplied gas and chemical compositions of weld steel and slag. And he shows that, when welded on plate, an decrease rate of carbon of weld metal is closely connected with a porosity of weld metal.
He will discuss the oxidizing reactions of carbon, silicon and manganse in the second report.抄録全体を表示PDF形式でダウンロード (414K) -
中村 武三1960 年 29 巻 5 号 p. 402-407
発行日: 1960/05/25
公開日: 2009/12/10
ジャーナル フリーIn this report, we describe some causes for spot-weld shear strength consistency in Alclad 24S-T, 1.8mm thickness. As spot welding machine, we used the single phase A.C. type spot welder with slope controlled wave shape. We studied the spot weld consistency in welding current, electrode tip condition and surface treatment.
It resulted as follows :
(1) Among the factors affecting spot-weld shear consistency, the surface treatment is very important. The wire brush method gives good results in the consistency compared with H2SiF6 method.
(2) Above experiment revealed that welding current consistency and weld shear consistency were both order of a few percent.
(3) The effect of electrode tip contaminotion is somewhat largr.抄録全体を表示PDF形式でダウンロード (2960K) -
杉原 栄次郎, 成田 国郎, 中田 充則1960 年 29 巻 5 号 p. 408-412
発行日: 1960/05/25
公開日: 2009/06/12
ジャーナル フリーIt has already been reported that in case of welding by low hydrogen electrodes, the Hot-Start method is quite effective to prevent porosity in starting point of beads, which method is now being adopted for practical use.
In order to find out the most effective condition in the current and the time of Hot-Start an experiment with short bead method has been carried out. As the result of X ray inspection for about 350 of the above short beads, time-porosity curves in each Hot-Start current drew our attention and interest. From these curves, we can find two important indices i.e. the severity of porosity elimininating time. By using these indices, we will be able to detect the best conditions of Hot-Start on each kind of the electrodes and furthermore, to make comparison of the prosity preventing caracteristics of two or more kinds of electrodes.抄録全体を表示PDF形式でダウンロード (4136K) -
鈴木 春義, 村瀬 剋1960 年 29 巻 5 号 p. 413-419
発行日: 1960/05/25
公開日: 2009/12/10
ジャーナル フリーThe corrosion resistance of inert-gas arc and oxyacetylene welds of Al-Mg-Mn alloy against an aqueous solution of 7% NaCl plus 3% H2O2, was studied by observing the progress of corrosion attack, weight loss, electrolytic solution potential, tensile properties and fatigue strength. The result is summarized as follows ;
(1) The corrosion attack on inert-gas tungsten-arc (TIG) weld and inert-gas metal-arc (MIG) weld was especially remarkable at the toe of weld, while the attack on oxyacetylene weld was over-all pitting on bead surface.
(2) The corrosion weight loss of TIG weld was the greatest among the three welds, however, there was not appreciable difference between MIG and oxyacetylene welds.
(3) The effect of the two attack on tensile properties was almost negligible as far 144 hours immersion was concerned.
(4) The as-welded fatigue strength after a repeated bending cycle of N=2×106 was 10.5kg/mm2 (80% of that of the base metal) in TIG weld, 10kg/mm2 (77% of base) in MIG weld and 9kg/mm2 (70 % of base) in oxpacetylene weld. However, the fatigue strengths 2×106 cycle of the three welds were decreased to the same value, 8 kg/mm2 (60% of base metal) after 144 hours immersion which caused 5 to 15% reduction in effective volume.抄録全体を表示PDF形式でダウンロード (9438K)
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