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Volume 26, Issue 6
Displaying 1-13 of 13 articles from this issue
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Statistics of chemical composition of core wire and deposited metalS. Ando, S. Mori1957 Volume 26 Issue 6 Pages 364-370
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSAbout 80% (81 kinds of 4mm, 69 of 5mm) of ilmenite type are welding electrodes used in the preceding reports have been analyzed for the six elements of core wire and deposited metal ; namely, C, Si, Mn, P, S, and Cu. On the results of the analysis, statistical research has been carried out on the following points :
1) Distribution and statistical values of the elements of core wire and deposited metal.
2) Difference and correlation between the elements of core wire and those of deposited metal.View full abstractDownload PDF (531K) -
Shapes observedT. Ohwa1957 Volume 26 Issue 6 Pages 370-373
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSShapes of penetration can be approximate by Gauss type distribution function. Sharpness. of. the penetration for low-hydrogen and cellulose-type arc-welding electrodes seems to be rather predominant than the others.View full abstractDownload PDF (2039K) -
E. Sugihara, S. Kikuchi, S. Horiguchi, M. Nakanishi, H. Hayasaki1957 Volume 26 Issue 6 Pages 373-379
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSThis paper gives a flow meter which indicates instantaneous value of welding gas flow at constant pressure. The flow meter consists of a strain meter and a pickup whose leg is fixed with resistance strain gauges. The trial flow meter is suitable for measuring gas flow of more than 103l/h, but gas flow of 102l/h can also be measured with a modified pickup.
Calibration of quantity of gas flow is also done with an apparatus, consisting of a small calibration tank and a cycle counter. Using the above meter and apparatus we could obtain the relation-ship between gas velocity and tip diameter at the blow out of oxyacetylene neutral flame.View full abstractDownload PDF (379K) -
An experiment on the brittleness of welded 18Cr steel plateS. Ando, N. Kimata1957 Volume 26 Issue 6 Pages 379-386
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSV-butt multi-layer welding of a 18Cr steel plate, 7., 5mm thick, has been carried out with three kinds of austenite electrodes (AlSl type 308, 316 and 310) and one kind of ferrite-austenite electrodes (all of them, 4mm diameter). The obtained welds have been subjected to a hardness test, microstructu-re test, V-notch Charpy impact test at -200-+300°C; fractographs of the brittle-fractured surfaces in their impact fractures have been examined and some considerations made on them.
Some of the major results are summarized :
1) Transition temperature in the non-affected and the heat-affected zone of parent metal is very high. It is higher in the latter than in the former ; in the latter no annealing effect is observable.
2) Impact value of welds using ferrite-austenite electrodes are in general lower than those of the ones using austenite electrodes. However, excessive lowering of these values does not take place on low temperature side.
3) Fractographs of brittle fractures in the impact fractures of the heat-affected, non-affected zones of parent metal and of welds have been studied to seek the relationship to ductility.View full abstractDownload PDF (6976K) -
S. Morita, K. Ishizaki, S. Goda1957 Volume 26 Issue 6 Pages 387-394
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSBased on the rusults of the investigation reported in the 2nd report, four heats of the Vanity+Ni +Cr+Mo type as the high tensile structural steel with tensile strength over 60kg/mm2 (H.T. 60) were melted in the 20 ton electric basic furnace, and their mechnical properties and weldability were examined in detail.
1. It is needed for getting satisfactory results that carbon content is kept about 0.13 and 0.15% for as rolled and normarized plates, respectively. Otherwise materials show much less tensile strenght or less elongation. Other alloying elements must be lowered to guarantee weldability of plates.
2. All steels tested are warranted for V-notch Charpy test results.
3. From the view points of hardenability and crack sensitivity, it is recommended that the respective Ceq are lower than 0.45 and 0.35.
4. Maximum hardeness below 350Hv in H.A.Z. of I.I.W. test guarantees the resistance to the generation of crack of Kinzel and Kommerel tests, and the I.I.W. maximum hardness plus the hardness of parent metal as low as possible under 550Hv guarantees no breaking at the bending angle of 120 dergee of Kommerel test.View full abstractDownload PDF (560K) -
H. Watanabe1957 Volume 26 Issue 6 Pages 394-399
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSIn this paper the accuracy of Gunnert's method, which was recomended by I.I.W. in 1952 as a standard to measure residual stress, are described. Some methods to increase the accuracy of measurements are also given.View full abstractDownload PDF (440K) -
Shrinkage distortion in welded joint (Report 5)M. Watanabe, K. Satoh1957 Volume 26 Issue 6 Pages 399-405
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSIn welded joints three types of distortion as shown in Fig. 1 are observed. Distortions of bead-on plate (thickness 3.2-19mm) are given in Table 1. Distortion of thick plate over about 10mm becomes concave-concave type, and for the thin plate less than about 6mm it becomes convex-concave type. Distortion of free butt-welded joint is generally concave-convex type as shown in Fig. 5 (No. 1 specimen) and Table 2. These characteristics can be explained by our theory of shrinkge distortion in welded joint. (see Fig. 3)
If transverse distortion in butt-joint is constrained, longitudinal distortion of mother plate apart from the weld line becomes convex. (see Table 2) Similar characteristics are observed in tee-fillet joint. (see Table 3) This is considered to be due to non-uniform distribution of transverse angular change.
In the very thin plate, distorrtion seems to be produced by buckling as shown in Fig.10.The distortion in this case is concave-convex or convex-concave type.(see Fig.9)View full abstractDownload PDF (515K) -
M. Otani1957 Volume 26 Issue 6 Pages 406-411
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSThe elastic and plastic behaviors of end fillet welds were investigated using T-joint specimens. The fillet size, amounts of off-set and gap of welded plates were changed in series. The stress-strain relations of joints were compared with the base plate, and the following results were obtained for 16mm thick specimens investigated.
(1) The T-joint with the fillet size of 12mm or less exhibited inferior rigidity to base plate. The performance of a larger sized one was satisfactory.
(2) A large off-set of tension plates injured the rigidity of joint. For instance, for 14mm size weld, it should be limited under 4mm in order to effectively transmit the tensile stress of plates about 10kg/mm2.
(3) The fillet size should be enlarged by the distance of gap between plates.
Further it was proved that the angle of fracture was larger for the fillet initially broken than the one broken in the next place.View full abstractDownload PDF (351K) -
1957 Volume 26 Issue 6 Pages 411
Published: 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSDownload PDF (38K) -
H. Trenkler, H.F. Hauttmann1957 Volume 26 Issue 6 Pages 412-415
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
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1957 Volume 26 Issue 6 Pages 415-416
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSDownload PDF (160K) -
[in Japanese], [in Japanese]1957 Volume 26 Issue 6 Pages 417
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSDownload PDF (64K) -
[in Japanese]1957 Volume 26 Issue 6 Pages 418-423
Published: June 25, 1957
Released on J-STAGE: June 12, 2009
JOURNAL FREE ACCESSDownload PDF (525K)
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