巻号一覧
23 巻, 4 号
選択された号の論文の16件中1～16を表示しています
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信太 邦夫1959 年 23 巻 4 号 p. 199-203
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe process of sintering in FeAl2-Ni-Fe system (Al 12%, Ni 25%, Fe 63%) is discussed in this paper from the experimental stand-points; i.e. the dependence of various properties (density, electrical resistivity, microstructure) upon the sintering process of water-quenched specimens from their sintering temperature has been investigated. The conclusions obtained were as follows: (1) At the sintering temperature of 700°C, a decrease down to 1/26-1/58 of the green compacts in electrical resistivity at was already observed, suggesting that the diffusion of the components has set in . (2) When the sintering temperature reached 1250°C, rapid alloying of component particle, i.e. the reactions of FeAl2 phase+Ni phase→α′ phase, and α′ phase+Fe phase (γ)→α phase have been observed, and after sintering at 1350°C for 90 min the specimens consisted of α phase only. (3) The effect of compacting pressure upon the sintering process of the FeAl2-Ni-Fe system where no liquid phase is was existence has been found to be larger than that when a liquid phase was in existence. (4) The effect of sintering temperature upon the sintering process of the FeAl2-Ni-Fe system has been found to be larger than that of sintering time.抄録全体を表示PDF形式でダウンロード (1004K) -
信太 邦夫1959 年 23 巻 4 号 p. 203-205
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe process of sintering in FeAl2-Ni-Fe system (Al 12%, Ni 25%, Fe 63%) is discussed in this paper. The relation between the X-ray diffraction pattern and the sintering process of water-quenched specimens from their sintering temperature, and the particle size effect of starting powder on the sintering process and the magnetic properties of the sintered specimens has been investigated. The results were as follows: (1) At the sintering temperature of 700°C, the change in electrical resistivity and X ray diffraction pattern at the various stages of diffusion of component particles has been observed. (2) When sintering temperature reached 1250°C, rapid alloying of component particles has been observed and a new phase (α-phase) has been found in X ray diffraction pattern. (3) The effect of compacting pressure upon the sintering process with liquid phase has been found to be larger than that without liquid phase is in existence. (4) An intense effect of particle size of the powder used upon the rate of homogenization has been found. (5) The effect of sintering temperature upon the sintering process of the FeAl2-Ni-Fe system has been found to be larger than that of sintering time. (6) Excellent magnetic properties could be obtained under favorable conditions.抄録全体を表示PDF形式でダウンロード (578K) -
筒井 蛙声, 古元 隆生, 市原 睦夫1959 年 23 巻 4 号 p. 206-208
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーOur study of the various effects on the carburized parts due to the difference of the carburizability has been nearly completed, and the results will be disclosed here in this paper. In other words, the various properties, regarded as would be effected by it, were broadly classified into 3 types; namely the physical, the mechanical and the other properties. An observation was made on the effects exerted on these properties by the difference in carburizability and, also, an experiment conducted further revealed what effect the difference wouldhave on the quench distortion, residual stress and bending tests.抄録全体を表示PDF形式でダウンロード (544K) -
和泉 修1959 年 23 巻 4 号 p. 209-213
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe elasticity change brought about by heat-treatment, especially by the “multiplex heat-treatment”(1), was investigated into of the several cold-rolled copper alloys, including pure copper, 80/20 brass, 60/40 brass, phosphor-bronze, nickel-silver and Cu-Be alloy. The present results were compared with the data previously reported on 70/30 brass(1), and were discussed from the standpoint of the practical usage. Pure copper easily tends to be recrystallized by heat-treatment, though the elastic value slightly increases unless recrystallization begins during annealing. A considerable increase in the value, as shown in the previous work, could be recognized when the multiplex heat-treatment was applied to brasses and phosphor-bronze. In the first heat-treatment of nickel-silver, the increase of the elastic value in the temperature range higher than about 250°C is so remarkable that even the further increase of elastic value upon secondary treatment at lower temperature is made inconspicuous. As to Cu-Be alloy, a similar conclusion can be drawn from the effect of precipitation at high temperaturerange.抄録全体を表示PDF形式でダウンロード (742K) -
井上 繁弘, 土屋 隆1959 年 23 巻 4 号 p. 213-215
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe variations in the hardness and the microstructure of “S” monel by solution and aging treatments have been observed, varying the silicon content of the alloy. The following results has been obtained. (1) The maximum hardness has been obtained by aging at 590°C for 6 hrs. (2) The higher the silicon contents, the higher the hardness after the solution treatment and also the higher the final hardness after aging treatments; this may be attributable to the increase of the eutectic component with silicon contents. (3) The monel containing 4.14% silicon has been found to be the most age-hardenable.抄録全体を表示PDF形式でダウンロード (408K) -
北川 公, 柴田 則夫1959 年 23 巻 4 号 p. 215-219
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe elimination of factors affecting the phosphovanadomolybdate method for photometric determination of phosphorus in iron and steels were studied, and the optimum conditions for them were determined. The following new analytical procedure is proposed. Dissolve 0.2∼0.5 g of sample with 7 mL of HNO3 (1:1) and 16 mL of HClO4 (70%) and evaporate HClO4 in fume for 5 min. Add 40 mL of distilled water and KMnO4 solution (1%) dropwise, if it necessary, then and NaNO2 solution (5%) dropwise and boil until precipitate is dissolved and Cr (VI) is reduced if it present. After the solution is cooled until room temperature, add 10 mL of ammonium vanadate solution (0.24%) and 15 mL of ammonium molybdate solution (15%), and allow to stand for 7 minutes. Then add 10 mL of citric acid (500 g/L) and extract the complex with 10 mL of it methyl-iso-buthyl Ketone twice immediately. Dry the extract with Na2SO4 anhydrous and make up to 25 mL, and measure its absorbance at 400 mμ or 490 mμ.抄録全体を表示PDF形式でダウンロード (621K) -
桜井 忠一, 川崎 正, 泉 久司1959 年 23 巻 4 号 p. 219-222
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe specimen (0.05%C mild steel) stress-aged at 100°C and 200°C for a suitable time was stretched at room temperature, and then strain-aged at a temperature range of 50∼200°. The amount of strain-age hardening of astress-aged specimen is much less than that of an unstress-aged one. The higher the aging-temperature and the longer the aging-time are the more remarkable is this tendency. When the stress-aging is tried on specimens for 6 min at 200°C twice in succession, they show only little strain-age hardening and recovery of the yeild-point. From these results, it will be found that a non-ageable mild steel may be obtained by stress-aging under suitable condition. The results can be explained as follows. In the process of stress-aging, not only a locking of dislocations by Cottrell’s effect but also a precipittation of excesive solute atoms at the dislocation must take place so that the amount of solute atoms in ferrite, which contribute to stress-aging of steel, decrease extremely. In the light of the above investigation, stress-aging may be utilized for preventing the stretcher-strain of sheet steels for deep drawing.抄録全体を表示PDF形式でダウンロード (637K) -
天野 恕1959 年 23 巻 4 号 p. 222-225
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe determination of Ta by isotope dilution method in the presence of Nb was investigated using the radioactive isotope 185Ta. Ta was separated from Nb as Ta-tannin precipitate in the optimum conditions of pH 1.9∼2.5 and of Ta/Nb ratio upto 1/50. If Nb was 100 times or more of Ta in content, reprecipitation was needed. The reciprocals of the specific activities of Ta2O5 precipitates were linear to the weights of Ta added. The recommended method gave accurate results for determination of Ta in steel.抄録全体を表示PDF形式でダウンロード (477K) -
天野 恕1959 年 23 巻 4 号 p. 225-228
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーAluminium was estimated radiometrically using 45Ca and cation exchange resin. The sample solution containing Al3+ was adjusted to pH 3.0∼4.0 and was treated with Ca-R type cation exchanger labeled with 45Ca. The radioactivities of eluted Ca were exactly proportionate to the amounts of Al3+ present. Interferences of Fe2+, Mg2+ and NH4+were examined and it was found that these ions did not interfere seriously. The results obtained from radiometric method agreed with the photometrically obtained values.抄録全体を表示PDF形式でダウンロード (505K) -
増本 量, 高橋 実, 杉原 真1959 年 23 巻 4 号 p. 229-232
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe change of the magnetization and the magnetostriction at room temperature in Fe-Co alloys was measured after magnetic annealing and the effect of magnetic annealing was observed only in the temperature range between the γ-α transformation temperature and about 400°C excepting the 76%Co-Fe alloys. The maximum permeability and the saturation magnetostriction showed a remarkable change when the alloys were annealed under the field at about 900°C and the temperatures of superlattice transformation. However, in the 76%Co-Fe alloy, the effect was remarkable only in the temperature range between 400° and 500°C. In the allloys of low cobalt content, when the magnetic annealing was made in the neighbourhood of about 900°C, the effect was especially remarkable. According to these results, it may be concluded that the origin of the effect of magnetic annealing in Fe-Co alloys is in close connection not only with the existence of superlattice but also with such a phenomenon as the displacement of vacancy, impurities etc. due to magnetostriction at high temperatures.抄録全体を表示PDF形式でダウンロード (574K) -
西野 知良1959 年 23 巻 4 号 p. 232-235
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーα-brass shows a sudden drop in density in the course of deformation at the point where the anisotropic anelasticity and anneal hardening are expected to become marked, indicating that vacancies are created in large numbers above this working degree, and probably that vacancies are closely connected with anneal hardening. The anelastic effect and the anneal hardening of α brass are very sensitive to the working temperature and rate, and seems that vacancies move during cold work and condense in an anisotropic manner, inducing an anisotropic anelasticity. Such an assumption may be confirmed by the characteristics of strain markings observed in micro-structure. Anneal hardening is considered to be induced by the disappearance of such an anelastic effect, which is brought about by the back stresses originated in pile-ups of dislocations and, it may be more important in this case, in internal stress of vacancies aggregated in an anisotropic manner.抄録全体を表示PDF形式でダウンロード (814K) -
西野 知良1959 年 23 巻 4 号 p. 236-239
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーWhen a heavily drawn specimen of α-brass is cold-rolled, it undergoes first a hardening and then a softening with the progress of rolling. This hardening will be called “secondary work hardening”. It is obtained by slight application of a secondary working differing in type from the primary, and in addition, it is marked only in such alloys as exhibiting conspicuous anneal-hardening. It may be inferred that anneal hardening and secondary work-hardening are induced by nearly the same cause, that is, both hardenings are similar phenomena due to destruction of the as-primary-deformation structure. They are dissimilar only in that in the former, the destruction is caused by internal stress and thermal diffusion, while in the latter, it is by forced deformation. The deformation structure above mentioned may be interpreted by assuming that the structure is marked in anisotropy in anelastic effect, and the effect is chiefly induced by the back stress due to the internal stress of vacancies which show anisotropic arrangement and shape depending on working condition. With the progress of different-type secondary working, the destroyed structure transforms gradually to the structure specific to the secondary working, causing softening.抄録全体を表示PDF形式でダウンロード (709K) -
五弓 勇雄, 阿部 秀夫1959 年 23 巻 4 号 p. 240-242
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーVariations in integrated intensities and integral breadths of (111), (200), (220) and (113) diffraction lines from cold-rolled silver (89% reduction) on annealing between 100°C and 950°C were observed by a counter-diffractometer. The results are as follows: (1) The lattice strain in grains having (110)[\bar112] orientation decreases most slowly during isothermal annealing at 100°C. (2) The integrated intensity of (111) line decreases to about 2/3 of that in the cold-rolled state by annealing at 100∼125°C, while no appreciable change in the intensities of (200), (220) and (113) lines is observed in this temperature range. (3) Remarkable development of the (110)[\bar112] texture occurs at 550∼800°C range by secondary recrystallization process, during which the (111) intensity decreases most rapidly and the (113) intensity decreases most slowly. Nuclei of the secondary recrystallization are large primaries or colonies of primaries having (110)[\bar112] orientation.抄録全体を表示PDF形式でダウンロード (411K) -
下平 三郎1959 年 23 巻 4 号 p. 243-246
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe relation between the thermo-ionic work function and the corrosion rate of the metals have been theoretically studied by means of the theory of the absolute electrode potential. At a given current density, the cathodic activation over-potentials of both either the hydrogen electrode and the oxygen electrode, decrease approximately in a linear relation to the increase of the work function, but the anodic oxygen activation over-potential changes in a reverse trend to the cathodic activation over-potential when the difference of the activation energies is small. In the case of the activation-controled corrosion, the corrosion rate of common metals decrease roughly according as the work function increases.抄録全体を表示PDF形式でダウンロード (573K) -
和泉 修1959 年 23 巻 4 号 p. 246-250
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe effect of rolling method on the hardness change due to annealing at 150° and 200°C was investigated into with samples of 70/30 brass, which had different grain-sizes (fine and coarse) and were cold-rolled by three types of rolling method (straight-, reverse- and cross-rolling). The hardness change before recrystallization was observed, in all cases, to be composed of two hardening stages, between which an intermediate stage of softening was almost constantly inserted. The amount of hardening, in general, seemed to be the greatest in the specimens which were cross-rolled. Upon heat-treatment at 150°C, more pronounced hardening was observed in the second stage of hardening than in the first stage, and the changing velocity seemed to be slightly delayed in the fine-grained and straight-rolled specimen. During heat-treatment at 200°C, the hardening at first stage was more predominant than that at the second stage, and beginning of recrystallization after the second hardening stage was considerably delayed in the specimen of coarser grain-size and lower reduction, though the intermediate softening stage was scarcely influenced by such grain-sizes or rolling reductions. The results obtained were discussed by dividing the causes of anneal-hardening into two factors, one of which might contribute to hardening and the other to softening.抄録全体を表示PDF形式でダウンロード (766K) -
和泉 修1959 年 23 巻 4 号 p. 250-254
発行日: 1959年
公開日: 2008/04/04
ジャーナル フリーThe difference in structures produced by three types of rolling method (straight-, reverse- and cross-rolling) and the change in the structures due to low-temperature annealing were investigated into with samples of 70/30 brass having different grain-sizes (fine and coarse), and were discussed in relation to the change in hardness previously reported. (1) At the rolling reduction of 40%, straight- or reverse-rolling gave a structure an inhomogeneity of deformation in some grains (in the case of fine-grained specimen) or within each grain (in the case of coarse-grained specimen). On the other hand, cross-rolling produced a comparatively uniform structure with conjugate slip. At the high reduction of 80%, a rolled structure seemed to be characterized by the remarkable development of flaw-like deformation markings. The structure was more complex in the fine-grained and cross-rolled specimens than in the others. The change in structure by annealing at 200°C was observed as diffuse or faint etched figures in the first stage of hardening and as a development of a kind of polygonization in the second stage of hardening. The latter was thought to contribute to the intermediate stage of softening between the first and the second stages of hardening. After those stages, nucleation by recrystallization gradually proceeded in accordance with the development degree of deformation structure.抄録全体を表示PDF形式でダウンロード (1196K)
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