巻号一覧
18 巻, 8 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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Genjiro Mima, Shosuke Imoto1954 年 18 巻 8 号 p. 445-448
発行日: 1954年
公開日: 2008/04/04
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梅川 莊吉1954 年 18 巻 8 号 p. 449-452
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーYoung’s modulus and its change accompanied by heat-treatment and by cold-working in gold-silver and gold-copper alloys has been measured by lateral vibration method of a cantilever under small amount of stress. The composition dependence of Young’s modulus is monotonous in both alloy systems. Young’s modulus of Cu3Au increases and of CuAu decreases the superlattice formation. The effect of cold work on Young’s modulus is similar for some gold-silver alloys, but it differs considerably with some gold-copper alloys.抄録全体を表示PDF形式でダウンロード (575K) -
大日方 一司, 西村 敬三, 和泉 修, 竹内 庸1954 年 18 巻 8 号 p. 452-454
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe Titanium Sheet used in this study was prepared from the home-made Titanium Sponge. The melting of the Sponge was carried out with the specially designed tungsten tipped argon arc furnace. The slab obtained was hot forged and rolled at about 800° and the cold rolled into the sheet having the thickness of 0.5 m/m: the final rate of reduction was about 38%. The Titanium Sheet, as rolled condition, was exposed to the corrosive action of HCl, H2SO4, HNO3, H3PO4, HF, aqua regia, picric acid, NaOH, FeCl3, CuCl2 having various concentrations respectively at room temperature. In order to obtain a basis for comparison, 18-8 Stainless Steel, Aluminium, Phosphorous Bronze, Nickel Silver and Lead were also subjected to the same corrosion test. The results of the corrosion test showed in general the superiority of the Titanium Sheet compared with other metals and alloys as shown in Table 2. Except conc HCl, conc H2SO4 and HF, the weight-decrease of the Titanium Sheet against various corrosive reagents was found to be negligiblly small. These results agreed in general with previous works well, except slight difference observed in the corrosive action of 70% H2SO4 reported by L.B. Golden.抄録全体を表示PDF形式でダウンロード (476K) -
小高 良平1954 年 18 巻 8 号 p. 455-458
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe influences of subzero-rolling and the subsequent tempering on the tensile properties of austenitic nickel-chromium stainless steel was studied using two kinds of steel, “B” and “C”, containing 8.7% nickel, 18% chromium in the former, and 11% nickel, 18% chromium, 2% molybdenum in the latter. Rolling of the steels at −183° promotes the transformation of austenite to martensite, resulting in unusual hardening and improvement in tensile properties, e.g. in “B” rolled to 78% at −183°, tensile strength of 210 kg/mm2, yield stress of 209 kg/mm2, proportional limit of 168 kg/mm2, elongation of 1.5% and hardness of 490 V.P.N. were obtained. A desired level of tensile strength was achieved by considerably smaller reduction at subzero-temperatures, bringing about better ductility, than at room temperature. Subsequent tempering at 400∼500° enhanced further the mechanical properties of the rolled steels, and in the one having strain-induced martensite of large amount, maximum values of the properties, in which the increase in proportional limit was especially remarkable, was obtained by tempering at 400°.抄録全体を表示PDF形式でダウンロード (700K) -
嵯峨 卓, 宮川 大海1954 年 18 巻 8 号 p. 459-462
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe authors have studied on the dispersion of Vickers hardness values at the load greater than 1 kg and found that the lighter the load, the greater the dispersion of Vickers hardness values. In this paper, we study the dispersion and distribution of Vickers hardness values at the load from 100 g to 1 kg for various carbon steels, in which the hardness values of two phases, ferrite and pearlite, differ considerably. This investigation may be essential to the hardness measurement of sheet metal.
The results obtained are as follows: (1) The coarser the grain, the greater the dispersion of Vickers hardness values; and it is minimum in the spheroidite. (2) In the coarse grain steel, except the pure iron and eutectoid steel, the dispersion of Vickers hardness values is increased rapidly as the load is decreased and the distribution has some peculiar type according to the relation between carbon contents, grain size and load. (3) Provided that the load is not extremely light, the dispersion of Vickers hardness values is increased gradually as the load is decreased in the fine grain steel. In general the relation between coefficient of variation and load seems to follow an emprical formula, C·P1⁄4=constant, where C is coefficient of variation in per cent and P is load in kg. In this case the distribution of hardness values remains the normal. (4) In the pure iron, eutectoid steel and spheroidite, the distribution of hardness values remains the normal even though the load is light and the grain is coarse.抄録全体を表示PDF形式でダウンロード (813K) -
Namio Kawashima, Yuzo Nakamura1954 年 18 巻 8 号 p. 462-466
発行日: 1954年
公開日: 2008/04/04
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楠本 健次, 太田 陸奥雄1954 年 18 巻 8 号 p. 466-470
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe process of precipitation of Mn from supersaturated solid solution of Al rich Al-Mn alloys was examined mainly by the X-ray diffraction methods. The changes in the electrical resistance, corrosion velocity in 20% HCl and Vickers hardness were also measured. The composition of specimen used are given in Table 1. By the experiments of Laue method it was shown that he specimen No. 1 precipitate metastble phase in early stage of precipitation. The amounts of the metastable and equilibrium phases (MnAl6) present in annealed alloys varied with annealing time, the metastable phase being gradually transformed into equilibrium one as annealing was prolonged, and finaly all the precipitates transformed into equilibrium phase MnAl6. So far examined, the Laue photographs of speicmen No. 2 showed the spots of metastable phase but no spot of MnAl6 was found. From Debye-Sherrer method, it is assumed, that this metastable phase is the “G” phase denoted by Hume-Rothery and his co-workers. The orientational relation of precipitated MnAl6 crystal with matrix crystal was assumed as follows: (315)_Al \varparallel(001)_MnAl6; [1\bar30]_Al \varparallel[100]_MnAl6 The metastable phases also have certain orientational relation, but it has not yet been found possible to determine. The presence of small amount of Fe or Si accelerates the velocity of precipitation markedly. In high purity Al-Mn alloys the metastable phase is very persistent, especially within the grains, and it requires very long time to occur the precipitation of MnAl6. The temperature of initial precipitation is assumed about 400°.抄録全体を表示PDF形式でダウンロード (834K) -
後藤 秀弘, 渡邊 四郎1954 年 18 巻 8 号 p. 470-473
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe studies were carried out on the influences of arsenic on the determination of sulfur and phosphorus in iron and steel, and the methods for avoiding the interference of arsenic were established. It has no influence on the determination of sulfur either with combution method, evolution method and gravimetric method. But arseniuretted hydrogen is evolved when the evolution method was adopted. So from the sanitary point of view, it is advisable to catch the arseniuretted hydrogen evolved with the potassium permanganate solution in the bottle connected at the end of the apparatus. On the determination of phosphorus by usual precipitaion method higher value was obtained in proportion to the content of arsenic in the sample. However the error could be made lessen to allowable one, by precipitating phosphomolybdate at low temperature.抄録全体を表示PDF形式でダウンロード (639K) -
後藤 秀弘, 渡邊 四郎1954 年 18 巻 8 号 p. 474-477
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーFollowing the first report of this series, the influences of arsenic on the determination of copper or manganese in iron and steel were studied. On the determination of copper there was no influence in sodium hyposulfite separation method or hydrogen sulfide separation method, directly. But in the procedure of hydrogen sulfide separation, the amounts of iron coprecipitated with sulfides became larger by the presence of arsenic, and so the reprecipitation of Fe(OH)3 to remove iron was necessary. There was no interference of arsenic with the determination of manganese by any method, such as, titration method with ammonium ferrous sulfate-potassium permanganate or with ammonium ferrous sulfate indicated its end point by diphenylamine or with sodium arsenite, after oxidation by ammonium persulfate.抄録全体を表示PDF形式でダウンロード (551K) -
大藤 能親, 松本 忠恕, 濱口 隆信1954 年 18 巻 8 号 p. 477-479
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーOn the quantitative determination of sodium contained in the silumin alloys, the characteristics of Fuji Panchromatic Process plates were examined by the spectrum exposure, because the ordinary spectral lines in the ultra range were not available in this purpose. The A.C. intermittent arc source was applied so as to secure the steady and reproducible analyses sensitivity. As a sampling device, the solutions method was adopted using a porous cup electrode, and for processing the standard sample series, copper was selected as an internal standard. A series of standard sample solutions having a known content ratios of Na to Al and several metal-specimens were prepared. With these solutions, the spectral lines were photographed on the same plates, and the Na quantity in the standard metal electrode was determined by the concentration ratio method. It was confirmed that the quantitative analysis is limit of Na in the silumin alloys by spectrography was 0.005%. The standard deviation percentage of this method was 8.10%.抄録全体を表示PDF形式でダウンロード (475K) -
大藤 能親1954 年 18 巻 8 号 p. 480-482
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe method to remove the influence of Zn added to Al-Mg alloy on the calibration curve of Mg and the method to raise the accuracy of mesuring value by the quantitative analysis were studied. As a result of this study, the influence of Zn was removed by using Zn, Cd or Pb as counter electrode. In the case of being free from this influence by adopting the counter electrode method, on mesuring the valtage of electrode gap indirectly by a Brown Tube Oscilloscope in order to investigate the change of exciting condition, some drop of the voltage to the nearly some level was observed in both Al-Mg and Al-Mg-Zn (9%) alloy systems. Furthermore, in this case an increase of the relative intensity arc line for spark line was observed by mesuring the fixing line pair, and it was shown that this influence was able to be removed by use of arclike discharge such as c=0, L=0.8 mH as an exciting condition. Then, by application of counter electrode method to general quantitative analysis, the reproducibility of mesuring values was somewhat raised. For instance, the deviation coefficient for the quantitative analysis of Cu in Al-Cu alloy was cut from 6.1% to 5.4%, and for Mn in steel, from 6.9% to 4.6%.抄録全体を表示PDF形式でダウンロード (594K) -
廣根 実？, 神垣 知夫1954 年 18 巻 8 号 p. 483-486
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe attenuation measurement of ultrasonic waves in normalized 0.75% carbon steel with various grain sizes is carried out in the frequency range from 2 to 25 megacycles per second. The attenuation increases with frequency slowly in the low frequency range, while very rapidly in the high frequency range, becoming the rate of increase steeper for larger grain size. The coefficient of attenuation α will be expressed by α=B_1f+B_2f^4where f is the frequency and B1 and B2 are the coefficients depending upon the grain sizes. The constant B2 is shown to be proportional with grain size of the steel. It seems possible that the said characteristics of the attenuation of waves are explained basing on Raighley’s theory of the scattering of waves in heterogeneous medium.抄録全体を表示PDF形式でダウンロード (720K) -
武田 芳三, 藤田 豐1954 年 18 巻 8 号 p. 486-488
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリー(1) By melting or casting copper, Si contents in Cu change especially the crucible for melting is important. In nitrogen atmosphere or vacuum Si in the graphite crucible mixes into Cu as impurity, for instance Si 0.037∼0.063%, and by the double melting or more Si increases to 0.098∼0.185%, but the lining of graphite crucible decreases Si contents, Al2O3, MgO or Filit (trade mark) were used. Oxygen in the air affects Si in copper as SiO2 and Si as impurity in copper decreases to 0.001%. (2) The scaling off of cuprous oxide film were studied by Si contents in copper. Over 0.02% Si increases the scaling off of oxide films. (3) The characteristics of rectification on cuprous oxide rectifiers in which copper contain Si 0.006%∼0.165% have been obtained. The forward resistance increases by Si contents, but the reverse negligibly.抄録全体を表示PDF形式でダウンロード (396K) -
本間 正雄, 安藤 隆俊1954 年 18 巻 8 号 p. 489-494
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーOrdinary cast irons have much degree of mass effect, namely when they are voluminous castings, their properties are different at inner and outer parts. But it is known that meehanite metals and Mg treated nodular cast irons have very small mass effect. We studied the mass effects of cast iron specimens contained different degree of oxygen content on the graphite structure, matrix, hardness, and strength. It was clarified that cast iron containing less oxygen has less degree of mass effect. This is understood by the experimental basis that when cast iron has small content of oxygen, the graphite structure and pearlite lamellae are not so changeable by cooling rate or thickness of castings.抄録全体を表示PDF形式でダウンロード (1110K) -
高野 重, 井樋田 睦, 堤 善作1954 年 18 巻 8 号 p. 494-498
発行日: 1954年
公開日: 2008/04/04
ジャーナル フリーThe authors have applied steam distillation to titration and photometric method, and have made new distillation apparatuses for each method. These apparatuses are convenient and safe in handling, requiring 5∼10 minutes in distillation. Then, the use of acid for rapid dissolving of sample, especially of perchloric acid, has been studied. It requires only 3∼4 minutes in case of using only 60% HClO4 in dissolving steel sample, and it has been confirmed that there is no loss of ammonia. Oxidation of ammonia by this acid occurs quickly above 200° but is not recognizable below 180°. If Nitrogen-Oxygen impurity is contained in acid for dissolving, it is reduced to NH3 and has an influence on the results. So it is necessary to remove nitrogen-oxygen impurity and on the other hand steel or iron, of which nitrogen content is beeing known, schould be used in blank test. And the method of purifying 60% HClO4 has also been described. Nitrogen values obtained by applying these methods have shown good reproducibility and have agreed favorably with the results obtained by the “Distillation Method” prescribed by the Japan Society for Promotion of Science.抄録全体を表示PDF形式でダウンロード (911K)
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