巻号一覧
19 巻, 11 号
選択された号の論文の19件中1～19を表示しています
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岡本 正三, 末永 勝郎1955 年 19 巻 11 号 p. 625-629
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーThis investigation was conducted to evaluate “Vitallium” consisting of 26 Cr, 6 Mo, 66 Ni+Co (Co>20) and 1.0 C, or and 0.4 C, from the following aspects: variation in room temperature and high temperature-hardness and in short-time bending creep strength at 900° up to 7 hrs in cast alloys of varying analysis in as-cast or annealed state; interrelation of age-hardening properties, thermal expansivities, scaling and decarburization, and the chemical composition. The 31% Ni specimens provide the best as-cast creep strength, while the materials annealed at 1000° for 2 hrs exhibit the highest creep strength at 16% Ni.抄録全体を表示PDF形式でダウンロード (1496K) -
末永 勝郎1955 年 19 巻 11 号 p. 629-632
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーStudies on the influences of both the preparing methods and chromium as raw material upon the prope-rties of Cr 60%: Mo 15%: Fe 25% base alloys were made. The alloys were melted in the following manners: (a) Covered with a flux of Al2O3 and CaO. (b) Fe2O3 or Cr2O3 was added with the intention of decarburizing under the same condition with a). (c) Ferro-vanadium was added with the intention of deoxidizing and denitrogenizing under the same condition with a). Under these conditions, alloying was always considerably difficult. Among the alloys made from different chromium as raw materials, almost no difference was found in hardness but some difference in creep strength at 900°. When the Mo content was 15% with various ratios of Cr/Fe, high hardness both at room temperature and at high temperatures and low creep strength were found at certain ratio of Cr/Fe, presumably due to the process of _??_ precipitation. The bending strength at room temperature is considerably low probably due to low ductility in correlation with high hardness. Further studies on the subject is highly necessary, but the purity of the chromium as raw material available in this country being too low for preparation of these alloys, further research on the industrial production of chromium of high purity is urgently required.抄録全体を表示PDF形式でダウンロード (1204K) -
小島 浩1955 年 19 巻 11 号 p. 632-636
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーThe relations between magnetic properties and the amount of Al2O3 or TiO2 were observed in Al2O3-Fe2O3-MO and Ti2-Fe2O3-MO system (M=Ba, Sr and Pb), varying the value of (Fe2O3+-Al2O3)/MO or (Fe2O3+Ti2)/MO from 3.5 to 9.0. In order to obtain a, constant and good activity, Fe2O3 specially prepared from Fe(CO)5 was used. The following results were obtained from the experiment: (1) π4 Is and 4π Ir of Ba-magnets increase by addition of Al2O3 only within the range of (Al2O3+Fe2O3)/BaO<4.5, but IHc is generally larger than that of the magnets containing no Al2O3. (2) IHc of Sr-and Pb-magnets increases by addition of Al2O3, but 4π Is monotonously decreases with the amount of Al2O3. (3) The magnetic properties of M-magnets are weakend by the addition of TiO2, except when the value of (Fe2O3+TiO2)/MO is 4. (4) 4π Is and 4π Ir. of Ba magnets reached the maximum at TiO2=5% and IHc at TiO2=7%, when the value of (Fe2O3+TiO2)/BaO was 4. (5) 4π Is and 4π Ir of Sr and Pb magnets attained the maximum at about TiO2=3% for (Fe2O3+TiO2)/SrO=4 and (Fe2O3+TiO2)/PbO=4, respectively. (6) The magnetic properties of M-magnets are apparently improved by addition of Al2O3 or TiO2 for (Fe2O3+Al2O3)/MO=4 and (Fe2O3+Ti2)/MO=4, but it is considered that the maximum points of magnetic properties in Fe2O3-MO system only shift by the consumption of MO, owing to the addition of Al2O3 or TiC2抄録全体を表示PDF形式でダウンロード (1268K) -
轉爐銅製錬におけるSO2反應について鶴本 多門, 柳橋 哲夫1955 年 19 巻 11 号 p. 636-640
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーThe equilibrium relation among SO2 gas oxygen and sulphur in molten copper, calculated from the theoretical equation obtained in the previous report, was numerically compared with the data observed in a copper converter furnance. The results were as follows: (1) The partial pressure of converter furnace gas was measured from 10% to 12% at the slagforming stage and from 14% to 18% at the blister forming stage. (2) It was observed that the temperature was in the range of 1200° to 1300° at the slag forming stage and in the range of 1150° to 1200° at the blister forming stage. (3) Next, the condition of the converting operation may be varied according to the blowing conditions as follows:
Condition of converter Oxygen and Sulphur % Partial pressure of
in molten copper SO2 (PSO2 atmosphere)
O% S% Over-blowing over 0.35 below 0.03 0.036
Standard blowing 0.35 0.03 0.06
Insufficent blowing below 0.35 over 0.03 0.09抄録全体を表示PDF形式でダウンロード (567K) -
Nitroso R塩による鋼中のコバルトの定量岡 好良, 鮎澤 三郎1955 年 19 巻 11 号 p. 640-644
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーCobalt reacts with nitroso-R-salt at pH 5_??_7, and gives a soluble red complex salt which is stable in strong acid solution. Though nitroso-R-salt also reacts with Fe and certain other metals to give complex salts, these complexes are easily decomposed by addition of mineral acid. Accordingly a separ-ation of Co from the other metals was not necessary. The cobalt complex had an absorption maximum at 415mμ and nitroso-R-salt in aqueous solution showed a strong absorption below 500mμ. Therefore, the excess of the reagent must be decomposed to measure the absorbancy of the Co complex at 415mμ. But, when the measurement was made in the wave-length range of 500_??_600mμ, 0.0 n% of Co in steel could be determined successfully in the presence of an excess of the reagent. The absorbancy readings changed gradually when Co and the reagent were allowed to react at room temperature, but upon warming, definite readings were obtained immediately. The complex salts of the other metals were decomposed by H2SO4. A presence of Fe ions caused low results. Neither a removal of Fe with ZnO nor masking of it with citric acid gave good results. Satisfactory results were, obtained when it was masked with Na4P2O7 In the presence of Na4P2O7, differences in absorbancy readings were not observed whether Co was present alone or Fe coexisted. W. V, Cr, Ni and Cu which had absorption in the visible range did not interfere. Of these, Cr, Ni and Cu form colored complex salts with the reagent, but they were easily decomposed when the composite solution was strongly acidifed with H2SO4.抄録全体を表示PDF形式でダウンロード (533K) -
燒鈍および急冷状態における磁氣的擧動山本 美喜雄, 谷口 哲1955 年 19 巻 11 号 p. 645-648
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーIt is shown that the anomalous magnetic behavior in low magnetic fields of annealed face-centered cubic nickel-cobalt alloys, as found previously by us(3, 4), can be explained in terms of the stabilization by the induced uniaxial anisotropy of domain walls(1, 2). The change of magnetic properties due to quenching from high temperatures have been measured, of which the main results are as follows: (1) The initial susceptibility increases with rising quenching temperature and reaches a maximum for quenching from temperatures near the Curie point, (2) the coercive force decreases appreciably and a maximum centered at about 50% Co in annealed state disappears completely, and (3) the anomalous magnetic behavior in annealed state disappears. These experimental facts have been shown to be explained by the disappearence due to quenching of the domain-wall stabilization. It is concluded that the magnetic properties of simple ferromagnetic cubic solid solutions are, indeed, sensitive to heat-treatment and the so-far presented domain theories are applicable only to solid solutions quenched from above the curieir temperatures.抄録全体を表示PDF形式でダウンロード (467K) -
磁場中熱處理の影響および高温における磁氣的擧動山本 美喜雄, 谷口 哲1955 年 19 巻 11 号 p. 648-651
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーIn continuation from Part I(1) the effect of magnetic annealing and the magnetic behavior at high temperatures have been studied with face-centered cubic nickel-cobalt alloys. It is shown that the remarkable effect of maguetic annealing in simple ferromagnetic cubic solid solutions such as face-centered cubic nickel-cobalt alloys may be explained by the appearence of the uniaxial ferrom-agnetic anisotropy due to the anisotropic distribution of atoms (2, 3). The conspicuous change in magnetic properties by magnetic annealing have been fonnd to take place at temperatures between the Curie point and the temperature at which the diffusion of atoms hardly occurs (about 400°). The magntization curve of an alloy cooled in magnetic field which was removed at a relatively high temperature shows a remarkable step at low fields, indicating that the magnetic field pressnt during heat-treatment merely changes the domain distribution in the specimen and that the effect of magnetic annealing on the magnetic properties is caused by the appearence of the uniaxial anisotropy in compliamce with the domain distribution during heat-treatment. The magnetization at low fields in queuched or in magneticaly annealed state shows a minimum at about 400_??_500°, while that in annealed state shows a monotonously rapid increase at these temperatures, and these facts can be explained by the formation or destruction of the domain wall stabilization.抄録全体を表示PDF形式でダウンロード (484K) -
Transformation Reliefの微細構造竹内 榮, 本間 敏夫1955 年 19 巻 11 号 p. 652-655
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーThe dislocation model for the mechanism of diffusion-less transformation from the f. c. c structure β to the c. p. h. _??_ in cobalt-nickel alloys has been studied and examined by means of electron-microscopic observation of relief markings on the crystal surface formed by the transformation. It can be considered that the transformation from β to ε proceeds through the motion of types of half-dislocations (α/6) [121]_??_, (α/6) [211]_??_, and (α/6) [121]_??_ in the {111} plane of an f. c. c. crystal. When these half-dislocations move in all directions over the crystal surface, tilts having three different inclinations to the surface are formed, which can be estimated as 19°28', -10°2' and -10°2' respectively if the surface is parallel to the (112) plane, while under an applied stress only one type of half-dislocations similar in direction to the stress can be considered to move. and then only one sort of the tilts is preferred. These ourface tilts result in the relief markings on the crystal surface. The above results predicted theoretically were confirmed by means of electron-microscopic observation of markings, and it was found that the width of the zone of homogeneous displacement in marking (about 0.1_??_1μ for 25%, nickel alloy) decreased slightly with decreasing nickel content, but for alloys having less than a few percent of nickel it decreased abruptly and for pure cobalt it was of an order of 100Å.抄録全体を表示PDF形式でダウンロード (2156K) -
熔銅とCO-CO2-SO2混合ガスとの平衡實驗に關する熱力的檢討佐野 幸吉, 坂尾 弘1955 年 19 巻 11 号 p. 655-659
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーThe activity coefficients of oxygen and sulphur in liquid were determined by thermodynamical consideration using the experimental results in the previous report. Using these activity coefficients, the equilibrium relations between liquid copper and CO-CO2-SO2 gas mixtures were obtained as follows:-
O-(in l-Cu-O-S)+CO=CO2; K'O=PCO2/PCO•[0%]
log K'O=10600/T-3. 820-311. 3•[0%]/T-242.6 [S%]/T.
S-(in l-Cu-O-S)+2CO2=SO2+2CO; K'S•P2CO/P2CO2•[S%]
log K'S=-15600/T+5.839-485.2•[0%]/T-281.6•[S%]/T
2_??_-(in l-Cu-O-S)+S-(in l-Cu-O-S)=SO2; K'OS=PSO2/[S%]•[0%]2
logK'OS=5600/T-1. 801-1107.8•[0%]/T-766.8•[S%]/T抄録全体を表示PDF形式でダウンロード (1350K) -
作井 誠太, 佐々木 悦夫, 佐藤 公子1955 年 19 巻 11 号 p. 659-663
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーThe specimens were quenched within a very short time of 0.01_??_0.04 seconds after the completion of hot working, thus preventing the recrystallization after hot working. The heating, working and cooling of the specimens during hot working were conducted auto-matically and the progress of these processes were recorded with an electro-magnetic oscillograph. The changes of strength and elongation of the specimens during hot working were also recorded. We measured at various temperatures below 600° the rate of recrystallization of cold drawn. α brass wires of various reductions and from these measured rates, we extrapolated the rate of recrystallization of the same specimens at higher temperatures such as the hot working tempe-rature of α brass. With reference to these data, we designed the experimental apparatus. These extrapolated values seem to be equal to or higher than the actually measured rate of recrystallization of a hot worked specimen of α brass at the same temperature.抄録全体を表示PDF形式でダウンロード (600K) -
作井 誠太, 佐々木 悦男, 佐藤 公子1955 年 19 巻 11 号 p. 663-666
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーThin wires of α brass and aluminium were elongated at various temperatures and quenched in water immediately after working. The micro-hardness of these wires were measured at room temperature and a remarkable work hardening was found even on the specimens elongated at the so-called hot-working temperature range. The work hardenings at various temperatures became larger with increasing working degrees. The load-elongation curves at high temperatures were recorded and were discussed in comparison with work hardenings of the same specimens measured at room temperature.抄録全体を表示PDF形式でダウンロード (457K) -
下平 三郎1955 年 19 巻 11 号 p. 666-670
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーThe thermodynamics of irreversible processes was applied to the electrochemical corrosion. affecting metals in acid solutions. The relations between polarization and electrochemical corrosion were studied and the following results were obtained. (1) The anodic reaction rate is equal to the cathodic reaction rate. This can be deduced, in phenomenological equations, from the fact that the rate of entropy production is minimum in a stationary state. (2) Both the natural electrode potential and the corrosion rate are expressed as functions of the equilibrium potential of the anode and the cathode, the phenomenological coefficients, the thickness of the diffusion layer and the concentration of the dissolved oxygen. (3) The corrosion rates are expressed as functions of the natural electrode potentials. (4) The relationship between the corrosion rate and the natural electrode potential depends on the phenomenological coefficients, the equilibrium potential of the anode and the cathode, the relative velocity of movement and the concentration of the dissolved oxygen.抄録全体を表示PDF形式でダウンロード (531K) -
下平 三郎1955 年 19 巻 11 号 p. 670-673
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーIn continuance to the previous study the thermodynamics of irreversible processes was applied to the polarization phenomena of corroding metals in acid solutions. The results were as follows: (1) It is not at the thermodynamical equ_??_librium potentials, but at the phenomenological equilibrium potentials that the discontinuity comes forth. (2) The discontinuity in the polarization curves is not due to the “area effect” or a coinciding of the external polarization curves with the internal polarization curves, but to a change in the polarity and the phenomenological coefficient. (3) Metals can be passivated by external or internal polarization.抄録全体を表示PDF形式でダウンロード (424K) -
共晶型二元合金大谷 南海男1955 年 19 巻 11 号 p. 674-677
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーThe author has introduced a formula which shows the relation between the potential difference in two components (A, C) of a eutectic binary alloy, in the case with a large influence of contact of A and C but comparatively small influence of oxide films on the surface, the specific resistance of the solutions, the polarization, the number of anodes and cathodes, the ratio of the components, the effect of oxide films and the corrosion current. Employing the formula, the author has proved that, supposing the atomic ratio α/β to stand for (base component α/noble component β) the corrosion current has its maximum point in a extension between α=1 and α/β_??_1 and the larger the number of grains the stronger the corrosion current, but when the film gets thick the preceding relation between the number of grains and the corrosion current becomes uncertain.抄録全体を表示PDF形式でダウンロード (387K) -
固溶體型二元合金(その1)腐蝕度と水素の吸着,吸収との關係大谷 南海男1955 年 19 巻 11 号 p. 677-680
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーInvestigating the relation between the binding energies among various metal atoms and the adsorption energy of hydrogen atoms, and that between the adsorption of hydrogen and the heat of activation in hydrogen electrode reaction on binary alloys of solid solution type, the author discusses the possibility of calculation on the change of corrosion rate in reference to the composition of alloys.抄録全体を表示PDF形式でダウンロード (413K) -
大河原 謙二郎1955 年 19 巻 11 号 p. 680-683
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーHydrogen dissolves considerably in molten aluminium and there are many studies on its gas content, but few on the gas content in solid aluminium. So, the author measured the gas content (by the electron impact method), the electric resistance, the grain size and the hardness to investigate whether hydrogen is absorbed by solid aluminium, and the following results were obtained: (1) The hydrogen absorbtion by solid aluminium began at about 620° by measuring the change of gas content and at about 640° by measuring the change of the grain size, of the electric resistance and of the hardness. (2) The specimen kept for 5 hours at the temperature above 620° in hydrogen gas indicated a finer grain size and a higher value of electric resistance and of hardness than the specimens kept at a temperature under 620° or not kept in hydrogen gas. (3) The absorbed hydrogen content was 1.61 cc per 100 g Al after keeping for 5 hours at 655° in hydrogen gas. So, it was confirmed that hydrogen was absorbed by solid aluminium at a temperature higher than 620°抄録全体を表示PDF形式でダウンロード (386K) -
松下 幸雄1955 年 19 巻 11 号 p. A215-A218
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーPDF形式でダウンロード (467K) -
眞野 國夫1955 年 19 巻 11 号 p. A219-A224
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーPDF形式でダウンロード (666K) -
森岡 進1955 年 19 巻 11 号 p. A225-A229
発行日: 1955/11/20
公開日: 2008/11/11
ジャーナル フリーPDF形式でダウンロード (520K)
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