巻号一覧
26 巻, 5 号
選択された号の論文の11件中1～11を表示しています
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今井 勇之進, 斎藤 利生1962 年 26 巻 5 号 p. 283-287
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe phase relations in solution treated Fe-C-Mn alloys containing about 12%Mn, 0∼1.2%C, and the phase transformations of these alloys by cold-working were studied mainly by thermal dilatation methods. The results obtained were as follows: α phase in solution-treated 12% manganese steels sharply decreased by addition of carbon and disappeared by addition of about 0.6%C. On the other hand, ε phase evidently increased by addition of carbon and has rose to the max. volume % at about 0.2%C, then gradually decreased with increase of carbon content and disappeared by addition of about 0.7%C. By cold-working, α phase in these alloys remarkably increased, but disappeared when the C content rose to 0.8%, while the max. volume of ε phase decreased and the C content at which the max. of ε phase was formed moved to the higher carbon range, and also the appearing range of ε phase extended to the higher carbon side. In these alloys, it seems that the phase transformation γ→ε→α occured by cold-working. It may be recognized that ε phase were formed in practically work-hardened Hadfield steel, but the volume of it may be little. As ε is the metastable phase which appears as intermediate state of γ→α transformation process in Fe-Mn alloys, the effect of carbon on the formation of ε phase in solution-treated high manganese steels varies by the compositions of steels which control the stability of γ phase.抄録全体を表示PDF形式でダウンロード (1396K) -
小田 仲彬, 井戸原 満1962 年 26 巻 5 号 p. 288-293
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーRecent developments in the tantalum refining industry have demanded a handy method of analyzing tantalum ores and related materials such as intermediates, and residues, for the control and improvement of the refining processes. By use of a medium quartz spectrograph the authors studied a spectrographic analytical method of these materials, in which the sample was fused with a fusion flux, powdered, and then sparked with a Feussner spark source. As the result, a method suitable for routine analysis was established. The factors investigated in the experiments were the fusion flux, amount of the flux to be added, fusion time, analytical gap, shape of the electrode, particle size and quantity of the sample to be fused, particle size of the fused sample to be sparked, analytical line pairs, and errors due to the sample preparation and the analysis. The outline of the method obtained was as follows: A mixture of 100 mg of finely ground sample and 50 mg of GeO2 added as an internal standard is carefully fused with 1.5 g of KHSO4, the resultant melt is cooled and pulverized to 180 mesh, loaded into a cup-electrode, and sparked with a graphite counter electrode sharpened to a truncated cone. The standard samples are prepared from synthetic oxides by applying the same fusion treatment as described above. In the various tantalum ores and related materials, Ta, Nb, Fe, Mn, Sn, Ca, Si, Ti, Al, Cr and Mg were determined over the range 0.05∼100% with a variation coefficient of 3∼5%, and good agreement was shown between the chemical and the spectrographic results.抄録全体を表示PDF形式でダウンロード (948K) -
真殿 統, 梶谷 弥寿男, 大村 正昭1962 年 26 巻 5 号 p. 293-296
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe authors studied the effect of aluminum, chromium and titanium on the properties of Fe-Cr-Al electric resistor alloys. The ingots were made by a special consumable electrode arc melting. The compositions of specimens were varied from 4 to 9%Al, from 5 to 36%Cr and from 0 to 0.8%Ti. After being forged and hot-rolled,the specimens were drawn for test pieces. Electric resistivity and heat durability were improved with increase of aluminum and chromium contents, though the ductility was lowered by increase of those elements. Aluminum was more effective than chromium,and addition of small amount of titanium was not only effective upon heat durability but also upon ductility. As is well known, the electric resistivity of the conventional alloys which contain comparatively lower contents of aluminum and chromium has a positive temperature coefficient and the ohm-resistance is increased with increasing temperature. As compared with those conventional alloys, the which contained substantially large contents of aluminum and chromium showed an extraordinary behaviour in changes of electric resistivity with changing temperature, and the ohm-resistance was reversely decreased with increasing temperature, which has the advantage of preventing the heat resistor from being locally heated and guarantees longer life. The temperature coefficient can be controled by changing the contents of aluminum and chromium.抄録全体を表示PDF形式でダウンロード (762K) -
高野 道典, 橋本 功二, 下平 三郎1962 年 26 巻 5 号 p. 297-302
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe electrochemical behavior of Al-Mg alloys were studied by means of a potentiostat. Since oxide films can be easily formed on Al-Mg alloys, both components of which are active, the reproducibility of results obtained by the potentiostatic was not so good. From the polarization curves in acid, neutral, and alkaline solutions, however, the effects of magnesium content could be seen. Results of these measurements were in good agreement with that obtained by corrosion tests. Anodic polarization of Al-1%Mg alloy in hydrochrolic acid or chloride solutions showed sometimes abnormal behavior. The surface of these alloys were examined by electron diffraction. According to the electron diffraction patterns, formation of MgAl2O4 films could be observed on the surface of Al-1%Mg alloy. This film may be more stable to chloride ions than the surface films of pure aluminium and high magnesium content alloys. The effect of aging on Al-Mg alloys was recently studied by Jacquet and his coworker only in the anodic region. In the present research, this effect on Al-5%Mg alloy was measured both in the anodic and the cathodic regions. In the anodic region, the degree of etching was dependent on aging time, and cathodic polarization was also dependent on aging time; namely, the longer the aging time, the alloys were more corrosive. From these results, it was concluded that the potentiostatic measurements could be applied to the study of aging of light alloys.抄録全体を表示PDF形式でダウンロード (1206K) -
森永 孝三, 恵藤 文二1962 年 26 巻 5 号 p. 302-308
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIn a former paper, the authors reported that two solid solutions, TiC(N) and TiN(C) are the minor phases in synthetic pig irons containing Ti and the other common components. In low-Mn and high-S pig Iron, however, it was found, Ti sulfide appears in addition to TiC(N) and TiN(C). Samples were made by addition of Mn and S at various % to synthetic Fe-C-Si-Ti alloy. The following results were found by microscopic, X-ray diffraction and other tests. (a) Ti sulfide is easily identified by microscopic and X-ray diffraction tests. (b) As reported by H. Morrogh, Ti sulfide appears in the pig iron which have Mn% as low as {(S%×1.7)+0.3}. (c) In many cases, Ti sulfide follows Fe sulphide. (d) Ti in sulfide does not refine the graphite structure and does not stabilize the ferrite formation.抄録全体を表示PDF形式でダウンロード (1841K) -
後藤 秀弘, 鈴木 進, 井上 泰1962 年 26 巻 5 号 p. 308-314
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIn order to illustrate the corrosion behavior of metals under radiation, we undertook a systematic study of the corrosion of pure metals in mineral acid under γ-irradiation. In this paper we describe the results of the experiments concerning the corrosion of copper in sulfuric acid. Irradiation cells containing sulfuric acid in the desired concentration in which pure copper plate is immersed is irradiated with a Co-60γ-ray source, the specimens is hauled up from the sulfuric acid and weighed to determine the weight loss; if necessary, the surface of the specimens are examined photographycally, or by X-ray or electron diffraction, and the corrosion products are chemically analysed. The test results are compared to with those of reference runs conducted under the same conditions minus irradiation. The results were as follows: (1) Effect of radtiaion is pronounced above the total dose of 107 r. (2) The loss of weight becomes greater with the higher acidity up to 5 N and then decreases, reaching the minimum at 20 N. But in concentrated sulfuric acid, it is remarkable and a dark green corrosion product is precipitated which is assumed to be composed of CuS. (3) The effect of radiation is mainly due to the decomposition of sulfuric acid and not to the influence on the nature of the metal itself. (4) The above results are discussed from the standpoint of the radiolysis of sulfuric acid solution.抄録全体を表示PDF形式でダウンロード (950K) -
黒沢 利夫, 石川 俊秀, 柳橋 哲夫1962 年 26 巻 5 号 p. 314-317
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーFor the purpose of the preparation of pure silicon by the iodide process, the reduction of SiI4 with hydrogen has been investigated in a small scale. Dense silicon layers as well as crystals could be deposited on a hot quartz tube. Higher reduction temperatures led to greater effective reduction yields between 800° and 1200°C and gave a yield over 90%. Higher reduction yield was obtained with rise of H2/SiI4 mole ratio, and a good agreement was found between experimental results and thermodynamically calculated values at 800°C.抄録全体を表示PDF形式でダウンロード (421K) -
村松 宏司1962 年 26 巻 5 号 p. 317-323
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe dissolution and the liberation of oxygen into and out of the melts under high or medium vacuum were studied to clarify the background for the vacuum melting of iron, nickel and their alloys, by employing a high-vacuum induction furnace for laboratory use and a vacuum-fusion gas-extraction apparatus, both of which were designed by the author. The main results observed were (1) in nickel melts in alumina crucible, the dissolved oxygen content in melt due to the partial pressure of oxygen in air in the range of medium vacuum is approximately proportional to the square root of its pressure, while in iron melt, the inclination is a little smaller than that in nickel melt, and the oxygen content in melt is about 0.005 per cent by weight in both iron and nickel, under a vacuum of 5×10−2 mmHg controlled by flowing dry air, for an exposure time of 30 minutes, (2) the decrease of oxygen content due to the time of holding in high vacuum of 10−5 mmHg is very small in both iron and nickel melts even when they contain a large amount of oxygen; moreover, there is a slight increase of oxygen content of both iron and nickel melts of initially low oxygen content, after a long hold in high vacuum.抄録全体を表示PDF形式でダウンロード (1416K) -
村松 宏司1962 年 26 巻 5 号 p. 323-328
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe deoxidation of melts by carbon or hydrogen in vacuum has been studied to prepare tolerably pure iron and nickel or their alloys. The main results observed were, (1) as the smaller values of the product of oxygen and carbon contents in iron and nickel melts under high vacuum of 10−4 to 10−5 mmHg, [0.0006%]·[0.0005%] and [0.0001%]·[0.0001%] can be obtained respectively, (2) the deoxidation rate of iron melt by allowing hydrogen to flow is much smaller than that in nickel melt, and the flow rate measured by volume of hydrogen is more effective for the deoxidation rate than the flow rate measured by the PV-product of it, (3) the release of hydrogen from iron when chill-cast in a water-cooled copper mould in low pressure hydrogen is much quicker than that in nickel, (4) the grain size of ingots made by chill-casting becomes very large with the decrease of oxygen content of melts, in both iron and nickel, in the range of lower oxygen content. (5) The cold-workability of these ingots is so greatly improved with decrease of oxygen contents of the ingots, that the ingots containing little oxygen can be easily forged at the room temperature without pre-heating, particularly in the case of nickel ingots.抄録全体を表示PDF形式でダウンロード (1672K) -
西 義1962 年 26 巻 5 号 p. 329-333
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーScales formed on TiC-Ni-Cr-Co, TiC-(Ti, Nb, Ta)C-Ni-Mo and TiC-(Ti, Nb, Ta) C-Ni-Mo-Al cermets at temperatures between 850° and 1350°C, were investigated by X-ray and electron diffraction methods. The following results were obtained. (1) TiO2 and NiOTiO2 or (Ni,Co)OTiO2 were formed in the scales of these alloys. The growth rate of these titanates increased at 1000°C, and that of TiO2 increased considerably at higher temperatures. (2) A double oxide, probably (Nb, Ta)2O5·TiO2, was observed on the alloy containing carbide TiC-(Ti, Nb, Ta)C, above 1200°C. (3) On the alloy containing the binder metal Ni-Mo, considerable formation of NiO was also observed, and that of NiOAl2O3 and α-Al2O3 was observed on the alloy containing the binder metal Ni-Mo-Al.抄録全体を表示PDF形式でダウンロード (944K) -
柳沢 三郎, 橋本 芳一, 安西 修一郎1962 年 26 巻 5 号 p. 334-338
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIn order to elucidate the diffusion of phosphorus into metallic silicon, the following experiments were carried out. The diffusion coefficients of phosphorus into the (111) of single crystal silicon were investigated in the range 1180 to 1330°C, with use of radioactivated red phosphorus by electropolishing to remove successive layers. By means of X-ray and electron diffraction analysis, infrared absorption measurement and other techniques, the mechanism of the diffustion were discussed, and the following results were obtained. (1) The diffusion coefficient can be expressed as D=0.12exp(−68.3 kcal⁄RT) cm2/sec at low surface concentration. (2) The fall of lattice constant is compensated by oxygen atom in the case of phosphorus pentoxide diffusion. (3) Infrared absorption at 9 micron appears by phosphorus pentoxide diffusion, but no absorption by elementary phosphorus diffusion. (4) It is estimated that the skeleton of the layer produced on silicon with phosphorus pentoxide is a kind of cristobalite, and that its semistructural formuarl may be given as (SiO2)2PO3. (5) On the surface with highly diffused phosphorus,a diffraction line 2.5 Å appears-the line cerresponding to the (210) of silicon. In conclusion, these results demonstrate that a little difference, owing to different diffusant sources may be in existence.抄録全体を表示PDF形式でダウンロード (926K)
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