巻号一覧
18 巻, 4 号
選択された号の論文の15件中1～15を表示しています
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五弓 勇雄, 鈴木 壽, 堀内 良1954 年 18 巻 4 号 p. 201-204
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe study on drawing textures in commercial pure titanium wire have been carried out and the experimental results are as follows: (1) The drawing texture of commercial pure titanium has, in general, the ⟨10\bar10⟩ direction or the type II diagonal axis parallel to the wire axis. (2) The recrystallized texture has, in general, the ⟨11\bar20⟩ direction or the type I diagonal axis parallel to the wire axis. (3) The degree of scattering varies with the depth from the surface of the wire and also such a texture as ⟨10\bar10⟩+⟨10\bar11⟩ is developed only at the surface of the wire reduced to 60% or more.抄録全体を表示PDF形式でダウンロード (655K) -
今井 勇之進, 熊田 健三1954 年 18 巻 4 号 p. 204-207
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーAbout 20 specimens containing 15∼74 per cent of chromum were examined for their hardness, dilatation and magnetic properties in order to study the effect of a long annealing at 500°. The change of physical properties by the prolonged annealing were found at about 25 percent and about 35 percent, but not at about 50 percent cf chromium content.抄録全体を表示PDF形式でダウンロード (650K) -
Eitaro Matuyama1954 年 18 巻 4 号 p. 208-211
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーPDF形式でダウンロード (600K) -
遠藤 彦造, 大谷 南海男, 下平 三郎1954 年 18 巻 4 号 p. 211-214
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe galvanic corrosion of mild steel-aluminium alloy was investigated in Na2CO3 alkaline solution at 30°. The results are summarized as follows: (1) As to mild steel in contact with aluminium alloy, the weight loss increases hardly at pH<8, but it decreases remarkably at pH>8 owing to cathodic protection. (2) On the other hand, as to aluminium alloy in contact with mild steel, the electro-chemical reaction (I) H+→H becomes the rate-determining step when the amount of OH− is large, but when it is small, the purely chemical reaction (II) Al (OH)3+NaOH→NaAlO2 becomes the rate determiner within the former range, the weight loss of aluminium alloy increases remarkably by contact with mild steel compared to that of aluminium alloy alone and it decreases within the latter range. (3) The boundary where the reaction (I) or (II) above mentioned becomes rate-determining is related to the pH value of the solution and r.p.m. of the specimen and the relation between these factors is interpreted by the decrease of the thickness of the diffusion layer of OH− and the increase of its diffusion amount.抄録全体を表示PDF形式でダウンロード (660K) -
三島 室, 太刀川 恭治, 大矢 龍夫1954 年 18 巻 4 号 p. 215-219
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe effect of cold work upon the magnetic properties of cold workable permanent magnet alloys such as Co-Fe-V, Co-Fe-Cr, Fe-Ni-Cr and Co-Fe-Cr-V, have been studied. The transformation from γ-phase to α-phase during cold work in these alloys is accompanied by linear increase of saturation induction value. When severely cold worked, the magnetic anisotropy appears, and the squareness of hysterisis curve becomes sharp so that the value of energy product increases considerably (See Fig. 2). However, no apparent effect can be recognized on coercive force as far as cold work alone is applied. When these alloys are aged at a suitable temperature after cold work, hardening is caused by the dispersion of the γ-phase within the α-phase. The coercive force of these alloys is found to increase extremely by a slight degree of cold work, after the above aging treatment (See Table II and Fig. 3). On the contrary, the hardness decreases in this cold work. The cold work after aging causes remarkable magnetic anisotropy within the alloy, and the energy product value in the rolling direction tremendously increases at a few percent of cold reduction (See Fig. 6). In this cold work, the once dispersed γ-phase will redissolve into the α-phase and thus the softening will occur. A state of high coercivity and anisotropy, however, seems to be attained during the resolution proceses.抄録全体を表示PDF形式でダウンロード (811K) -
西 成基1954 年 18 巻 4 号 p. 219-223
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThese experiments were performed to study the effects of manganese content (0.3∼1.0%) on the aging phenomena of magnesium rich 8% zinc-magnesium alloys. The changes in physical properties during aging show that increasing of manganese content retards hardening velocity and reduces their maximum hardness and these effects are remarkable when manganese content exceeds 0.7%. X-ray diffraction shows that these effects, principally, depend on the change of the solid solubility of zinc in magnesium, caused by the increase of solid solubility of manganese in magnesium matrix, and that hardening is remarkable when the crystallographic relation between the magnesium matrix and the precipitate ζ phase (ZnMg) causes to increase the lattice constant c in magnesium lattice. Manganese content may increase the internal stresses before the precipitation of ζ phase but has little effect in increasing the hardness. The precipitation of these alloys belongs to the “continuous type”.抄録全体を表示PDF形式でダウンロード (867K) -
岡 好良, 鮎澤 三郎1954 年 18 巻 4 号 p. 224-228
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーAn addition of K3 [Fe(CN)6] to an ammoniacal solution of cobalt causes a brownish red coloration. When the solution was left standing for some time, brownish black precipitate were separated out. When (NH4)2SO4, (NH4)3PO4 or NH4-citrate was present, a reddish clear solution was obtained. Thus the solution changed its hue and color intensity with anions present. But when the concentration of (NH4)3PO4 and NH4-citrate was kept at about 2 and 2N respectively, no effects on the color intensity of SO4″, Cl′ ions and the amount of K3 [Fe(CN)6] added was observed. In visible range, the cobalt complex showed an absorption below 650 mμ having absorption maximum at about 445 mμ. From 480 to 520 mμ, it showed a shoulder. Potassium ferricyanide solution showed a deep absorption below 500 mμ and the above transmittancy reading was 100%. Therefore, when wavelength within the range between 500 and 650 mμ is used, the absorption due to an excess of the reagent does not interfere the determination of cobalt. At the wavelengths, for example, of 500, 510, 520 and 540 mμ, it obeyed the Beer’s law. There was no difference in absorbancy whether cobalt was present alone or iron salt was coexistent. Chromate and tungstate ions must be removed.抄録全体を表示PDF形式でダウンロード (778K) -
後藤 秀弘, 渡邊 俊雄1954 年 18 巻 4 号 p. 228-231
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe determination of non-metallic inclusions in cast iron was studied by chlorine method. The determination for white cast iron was carried out easily, and it gave a satisfactory value, but the same treatment of gray cast iron as above gave higher results for FeO and MnO. In order to overcome these unsatisfactory results the following experiments were tried. (a) Raising the temperature of chlorination untill 400° to 450°. (b) Treating the chlorination residue with ammonium citrate and nitric acid. But these results were not satisfactory. Then the sample was treated by chlorine gas. This method was found to give correct values and available for malleable cast iron and nodular cast iron.抄録全体を表示PDF形式でダウンロード (630K) -
五弓 勇雄, 鈴木 壽1954 年 18 巻 4 号 p. 232-236
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThis report was written as the first section of the fundamental study on manufacturing seamless zinc shell for dry cells by means of backward impact extrusion. We have mainly investigated the influences of various factors on the extrusion force, such as “R” of punch and die, tapering of punch, rate of extrusion, working temperature, annealing temperature of blanks, impurities, etc. Then we have obtained the theoretical formula in respect of the extrusion force for thin wall shells. This formula, we believe, will be practicaly useful, as the actual extrusion force-stroke of punch curves are finely shown by calculating it.抄録全体を表示PDF形式でダウンロード (765K) -
五弓 勇雄, 鈴木 壽1954 年 18 巻 4 号 p. 236-239
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーExtrusion forces were described in the first report, and we report herein our investigation mainly on the flow test of materials, some defects and properties of the shell, etc. Especially, such flow mechanisms as which part of the shell is corresponding to which part of the blank are clarified. Extruded textures produced on the side wall of the shell are the same {0002}⟨11\bar20⟩ as rolled textures: the extruding direction and the tangential plane of the surface are parallell to the rolling direction and the rolling plane respectively. The textures of the bottom are of ⟨0002⟩ compression. Besides, we have stated as cleary as possible, advices on designing of punches and causes of some defects which arise on the wall of the shell, namely, holes, cracks, folds, etc., and their prevention is also made clear.抄録全体を表示PDF形式でダウンロード (711K) -
眞野 育三1954 年 18 巻 4 号 p. 240-243
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーTo study the influence of casting temperature, wall thickness, and kind of mould on tensile strength and the elongation of cast 88-10-2 gunmetal, the author carried out investigations with 36 conditions by means of the experimental design of three-way layout and the following results were btained:
(1) Among the test casting temperatures (1050∼1200°), the higher casting temperature is, the better results is obtained, and the correlations between the casting temperatures and the tensile strength and the elongation are as follows: & T.S. =-10.40+0.02910 ×T
& El =-56.22+0.06156 ×T
where & T: casting temperature in °C
& T.S.: tensile strength, in kg/mm2
& El.: elongation, in %
(2) The selected wall thickness, in this investigation, was 5, 10 and 20 mm. In heavy wall thickness better results are obtained than in thin wall.
(3) In dried sand mould better results are obtained than in green sand mould.
(4) There is an approximate correlation between tensile strength and elongation as follows: El. = -24.01 + 1.6488 ×T.S.
(5) From this investigation the most suitable casting condition was determined.抄録全体を表示PDF形式でダウンロード (588K) -
土方 儉三1954 年 18 巻 4 号 p. 244-247
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーHomogeneity during heat-treatment of 57:43 (by weight) copper-nickel compacts was observed by means of observations of microstructure and X-ray diffraction pattern and measurements of temperature coefficient of electrical resistance. Powder mixtures of copper and nickel, having different particle sizes, were pressed at 30 and 100 kg/mm2. In combination of 100∼120 mesh copper and 100∼120 mesh nickel powders, homogenization was not sufficient for sintering at the condition of 1100°, 2 hr. In combination of fine powders (250∼300 mesh), homogenization seems complete at the temperatures of 1000° and 1100°. Effect of compacting pressure on homogenization was not evident. Weight changes that take place in hydrogen atmosphere during heating of mixed powders and its green compacts pressed at 30 and 100 kg/mm2 were measured up to 900° by thermal balance. By the reduction of oxide film, adsorbed oxygen on particle surface and oxygen entrapped during the pressing operation with hydrogen, water vapour evolves. Adsorbed and entrapped nitrogen evolves at elevated temperature too. Weight decrease of compact pressed at 100 kg/mm2 was smaller than that of powder and of compact pressed at 30 kg/mm2. Then, it seemed that, in compact pressed at 100 kg/mm2, residual water vapour and nitrogen are enclosed in gaps between particles, and those water vapour and nitrogen prevent the interdiffusion between copper and nickel.抄録全体を表示PDF形式でダウンロード (913K) -
土方 儉三1954 年 18 巻 4 号 p. 247-250
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーInfluence of different mixing methods of iron and nickel powder on homogeneity was observed by the measurement of thermal expansion of sintered and forged compacts. (1) Iron-nickel compacts (36% Ni) pressed at 14.3∼29 kg/mm2, were sintered at 1300° for 3 hr and forged. The expansion coefficients of these specimens were 6∼7×10−6 (20∼100°). In these specimens, it seems that homogenization is not suffic ient. (2) Mixed oxide was prepared by calcinating the nitrate mixture of iron and nickel (64:34) and was reduced in hydrogen. Then, the reduced powder was compacted at 30 kg/mm2, sintered at 1300° for 3 hr and forged. The expansion coefficient of this alloy was 0.86×10−6 (20∼100°). From this value, it can be said that the homogeneity of this alloy is almost complete. (3) Mixtures (36% Ni) of iron and nickel were heated in open air at 400∼800° for various heating times and reduced in hydrogen at 500°. These powders were compacted at 10 kg/mm2, sintered at 1250° for 3 hr and then forged. The expansion coefficients of the specimens made by this method were 0.67∼2.65×10−6 (room temp. ∼100°). The alloy of minimum coefficient was prepared from powder mixture oxidized at 800° for 30 min and reduced at 500° for 4 hr. The surfaces of powder particles made by this method are covered with fine reduced powders. It seems that, at the first stage of rising temperature sintering takes place at fine powder zone and at contact surfaces between mother particles and fine powder zone, and, at the second stage, interdiffusion between iron and nickel takes place easily through the widened bridges between the particles.抄録全体を表示PDF形式でダウンロード (596K) -
依田 連平1954 年 18 巻 4 号 p. 250-255
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーBy the usual magnesium treatment, the content of nitrogen in iron decreases only to 0.0005∼0.0015%, and the more the residual nitrogen in the iron remains, the more the cementite in the iron appears, the spheroidizing of graphite being not disturbed by the remaining nitrogen. A little denitrogenation in magnesium-treated molten iron is considered as not caused by the formation of magnesium nitride (Mg3N2), but by the boiling action of the molten iron due to the evolution of magnesium resulting from the decomposition of Mg3N2 at about 1150°. By addition of Mg3N2, both deoxidation and desulphurization of the molten iron as well as the alloying of magnesium are achieved. In this study the spherulitic graphite iron was found to be readily obtained by the treatment with 1% or more Mg3N2. The chief merits of this process on the spheroidization of graphite are (1) the danger of the explosion of the melt is completely removed, so that the operation is safely performed, (2) other elements besides magnesium are not alloyed in the molten iron, which removes the trouble resulting from the return scrap.抄録全体を表示PDF形式でダウンロード (1426K) -
池野 尚志1954 年 18 巻 4 号 p. 255-259
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe effect of the heating temperature after hot-rolling upon the recrystallization in cold-rolled 0.5 mm thick 2 s sheets was studied. The results obtained may be summarised as follows: (1) The recrystallization grain after hot-rolling becomes finer in size with the increase of hot-rolling degree and the rise of interval heating temperature. (2) The recrystallization temperature becomes higher with the decrease of the degree of cold-rolling degree and the rise of the interval heating temperature even when the degree of cold-rolling is similar. (3) When the grain size of plates before cold-rolling is finer, the recrystallized grains also becomes finer. (4) As the degree of hot-rolling increase or that of cold-rolling decreases, the mechanical properties of recrystallized sheets becomes more isotropic.抄録全体を表示PDF形式でダウンロード (1146K)
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