巻号一覧
26 巻, 2 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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今井 勇之進, 斎藤 利生1962 年 26 巻 2 号 p. 73-77
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーEffect of cold working on thermal dilatation characteristics in temperature range up to 350°C of Hadfield steels were studied by differential methods. Thermal dilatation curves of work-hardened steels varied with the working ratio and the working methods. Hammered steel firstly contracted in the temperature range of 80∼180°C and then rapidly expanded at about 200°C in dilatation curves. As the working ratio was raised, these changes became gradually clear. On the contrary, it was found that there were not only a first contraction at about 150°C, but a second contraction at about 230°C in thermal dilatation curves of static-elongated steels. As the elongation increased, especially the second contraction grew gradually. In microstructures of hammered steel, as the working ratio rose, the number of sharp strain markings increased. But, in elongated steel, it appeared that the strain markings were gradually twisted and enlarged in width.抄録全体を表示PDF形式でダウンロード (1303K) -
今井 勇之進, 斎藤 利生1962 年 26 巻 2 号 p. 77-81
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーHammered Hadfield steel first contracted in the temperature range 80∼180°C and then rapidly expanded at about 200°C in dilatation curves. These changes were observed similarly for steel hammered at room temperature as well as at liquid-air temperature. Hammered steel, isothermally heated at about 150°C, contracted with longer holding time, but it appeared that the steel has the tendency of expansion after the contraction was saturated, and to expand sharply by rise of temperature after isothermal heating. The activation energy of this contraction was about 35,700 cal/mol by isothermal dilatation method. Steel with higher manganese content than Hadfield steel only slightly contracted in thermal dilatation curve. Therefore, it is considered that this contraction is due to the movement of carbon atoms in austenite, and also the rapid increase of thermal expansion at about 200°C is certainly due to expansion by transformation of the ε phase formed by hammering to γ phase.抄録全体を表示PDF形式でダウンロード (995K) -
音谷 登平, 師岡 保弘, 形浦 安治1962 年 26 巻 2 号 p. 82-86
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIn the study of manufacturing calcium-killed steel, an iron-calcium base alloy was employed for producing a clean fine-grained steel which contained no such dirty inclusions as in the ordinary aluminum-killed steel. Steel containing 0.3∼0.8%C were melted in 4 charges in a magnesia-lined high frequency induction furnace having a 30 kg capacity. Each steel specimen was prepared from electrolytic iron and gas carbon. After deoxidizing at 1630°C with 0.5% of ferro-manganese, 0.3% of metallic silicon and 0.05% of aluminum, the melt was divided into three parts, each part being treated with different amount of the iron-calcium base alloy and cast into a CO2 sand mould of keel block type or an iron mould. The results of this experiment are summarized as follows: Such alloy addition was effective in reducing the amount of inclusion types A and B, and especially the inclusion type B was almost entirely eliminated. The alloy addition also improved the grain size of the steel. The refining of the grain size may be possibly attributed to the presence of aluminum nitride which was formed from the reaction of the aluminum reduced by the alloy with some of the nitrogen dissolved in the molten steel. This was proved by the fact that the amount of aluminum nitride was larger in the steels treated with the iron-calcium base alloy than in the untreated steels and at the same time the amount of oxides including alumina became smaller in the former than in the latter under the same conditions of melting.抄録全体を表示PDF形式でダウンロード (1173K) -
遠藤 信, 行方 二郎1962 年 26 巻 2 号 p. 86-91
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe phenomenon which is called strain-aging reaction—the hardening of metal by aging reaction after cold working—brings us face to face with various problems. It was confirmed that strain-age hardening is caused by C and N dissolved in α iron, and the phenomenon in consequence of fixing C or N as TiC or TiN by can be nearly totally prevented adding proper amount of Ti, and extremely decreasing the amount of C or N dissolved in α iron. But there is no definite theory on the influence of small amount of C or N dissolved in α iron on strain-aging reaction. In our research in connection with the age hardening phenomenon, the hardness of mild steel was measured at various temperature in the range from room temperature to 340°C, using specimens of 0.07%C steel, in which were the amount of C or N being dissolved in α iron was variously increased or decreased by heat treatment. As the result it was found that the 1st peak of hardness occured by coagulation of C or N in the vicinity of the dislocation at various temperature below 200°C according to the solubility of C or N in α iron, and the 2nd peak was caused by recovery of N in α iron at temperature from 210°C to 240°C.抄録全体を表示PDF形式でダウンロード (1320K) -
滝島 延雄1962 年 26 巻 2 号 p. 91-96
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーSteel foil samples were used so as to reach the equilibrium value by short treatment with the carbo-nitride gas, which is a mixture of CO and NH3 in various ratios. The reactions were made at 600∼900°C, and the following results were obtained:—(1) C,N contents reached the equilibrium value after 1∼2 hours of treatment, and afterwards the N contents made no change, but the C contents had the tendency of increasing variously according to the conditions of treatment. (2) The equilibrium C content showed a higher value than in carburized steel. Under the mixing ratio of CO:NH3=6:4,it was 0.58% at 600°C and at higher treating temperature, it increased and showed the highest value of 3.60% at 800°C. (3) Again under the same mixing ratio, the equilibrium N content was 10.28% at 600°C and with the rise of the treating temperature it decreased suddenly. (4) The high C,N contents are caused by the formation of ε-carbo-nitride, and to prevent the formation of this phase, because of this phase is not hardened by quenching, the treating temperature must be kept at 800∼830°C. (5) The change in C, N contents by change of the mixing ratio of CO, NH3 is small. (6) ε-phase precipitates Fe3C, graphite, and because of that, the C content increases as the time passes and these precipitating phenomena move to low temperature as the CO content increases. (7) ε-phase is a close-packed hexagonal lattice and as the treating temperature falls the lattice constant grows larger, and the axial ratio (c⁄a) approaches 1.633.抄録全体を表示PDF形式でダウンロード (772K) -
滝島 延雄1962 年 26 巻 2 号 p. 96-100
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーSteel foil samples were used as before, in order to get a uniform structure in a short time treatment, and to make it clear what kind of phase the surface layer would pass through, at carbo-nitriding, in the process of reaching the equilibrium value. Taking it for granted that when the electric-resistance change was measured and it was observed that change in phase took place, there would be a sudden change in electric resistance. The following results were obtained:—(1) At 850∼600°C, when carbo-nitrization began a sudden rise in electric resistance occured, making the saturation curve reached the equilibrium value. (2) Another sample, that was treated under the same condition as in (1), was taken out at times, was analyzed by X-ray, and it was proved that the sudden change in electric resistance was caused by a change in phase. (3) At 850∼650°C the carburizing got through the process of α-γ-ε and balanced at ε-phase. (4) At 600°C, the process of α-γ′-ε is gone through and without passing the γ-area,carbo-nitriding goes on. This γ′-phase corresponds to γ′-phase of Fe-N system and is different from γ-phase of (3). The lattice constant (a) is 3.783Å. Therefore it became clear that the treatment proved to be below the ternary transformation.抄録全体を表示PDF形式でダウンロード (536K) -
下平 三郎, 松尾 正之, 菅原 博, 蛯子 栄1962 年 26 巻 2 号 p. 100-103
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーRecently, potentiostatic measurements for the study of metallic corrosion have been adopted by many investigators. But vacuum-tube-type potentiostats do not always supply the high amperage necessary to obtain a perfect polarization curve, e.g. of iron in acid aqueous solutions, and for anodic protection of metals. The potentiostat described in this paper was constructed in our laboratory for the purpose of high current measurements and other studies. Response time of the amprifier is 10−3 to 10−4 sec, and the maximum current capacity of this instrument is 10 A. depending upon the capacity of the transistor.抄録全体を表示PDF形式でダウンロード (470K) -
深海 繁1962 年 26 巻 2 号 p. 103-108
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーEs wurde hier der Verzug des Erweichens der binären Legierungen systematisch untersucht. Die Hauptversuchsergebnisse sind wie folgt: In den Zinn-Kadmium eutektoidischen Legierungen erweichen die Bestandteilsmischkristalle, die die Matrix von den eutektodischen Legierungen bilden, sich erst erheblicher mit der Zunahme des Kaltbearbeitungsgrades nach der Verhärtung im geringen Kaltbearbeitungsgrade. Deshalb zeigt es sich, dass der Verzug des im geringen kaltbearbeitungsgrade vorkommende Erweichens der eutektoidischen Legierungen auf den Erweichen der die Matrix zusammensetzende Mischkristalle beruht. In den Kadmium-Zink eutektischen Legierungen erfolgt der Verzug des im geringen Kaltbearbeitungsgrade entstehenden Erweichens des Eutektikum unter dem Einfluss von der in den geringen Kaltbearbeitungsgrade vorkommenden Verhärtung der zinkbasischen Zink-Kadmium Mischkristalle.抄録全体を表示PDF形式でダウンロード (862K) -
阿部 敏雄, 石田 和以1962 年 26 巻 2 号 p. 108-111
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe kinetics of the vitreous silica-molten silicon reaction in the 1430∼1620°C temperature range are investigated. The activation energy for the rate of solution of silica, ΔH, was found to be 57±3 kcal/mol. The rate determining step for this reaction is the diffusion process.There is no past data for the heat of solution of oxygen in molten silicon in the presence of silica, ΔHsoll. It was estimated by thermodynamical analysis that ΔHsoll≈ΔHsols+7 kcal/mol, where ΔHsols is the heat of solution of oxygen in solid silicon in the presence of silica. Using the above relation and Logan and Peters’ value for ΔHsols=53±7 kcal/mol(6), it is estimated that ΔH≈ΔHsoll. According to Taft and Horn(2), however, ΔH is 31 kcal/mol, and this value is also consistent with ΔH≈ΔHsoll, if Hrostowski and Kaiser’s value for ΔHsols=23±3 kcal/mol(7), is used.抄録全体を表示PDF形式でダウンロード (437K) -
田中 英八郎, 福田 武司, 角川 清夫1962 年 26 巻 2 号 p. 112-116
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe effect of cold rolling conditions upon residual stress of strip and diameter of curled coils have been investigated. If tension is relieved after rolling, cold-rolled thin strips will curl to the upper work-roll side, when the upper work-roll has a slight offset to the rolling direction from the line of centers of the lower work-roll and two back-up rolls, when the upper work roll is a little smaller in diameter than the lower-roll, and when the passline of the strips leans to the upper roll side at the exit. These results, obtained from calculations based on the residual stress distribution reported by Baker,Ricksecker and Baldwin, have been proved by the rolling experiment using a Sendzimir 20-high mill.抄録全体を表示PDF形式でダウンロード (693K) -
田中 英八郎, 福田 武司, 角川 清夫1962 年 26 巻 2 号 p. 117-121
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe relation between the cross sectional configurations of cold-rolled thin strips and the diameters of bowed strips after slitting has been investigated. When a cold-rolled strip is multi-slitted, a edge-rippled or center-buckled strip will bow in its plane by the widthwise variation both in elastic strain and in plastic strain. The diameters of bowing due to both the effects can be calculated by the equations (6), (11) in edge-rippled strips, and (10), (12) in center-buckled strips respectively. These results have been proved by the slitting experiment of some cold rolled strips.抄録全体を表示PDF形式でダウンロード (757K) -
黒沢 利夫, 柳橋 哲夫1962 年 26 巻 2 号 p. 122-126
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIn order to study the preparation of pure silicon by the reduction of its iodide with hydrogen, the proper conditions for production of silicon tetraiodide have at first been investigated. By reacting crude silicon with iodine vapor in a vertical quartz tube, silicon tetraiodide was prepared at temperatures between 400∼1050°C. It was found that the amount of products depends on the flow rate of iodine vapor. Silicon tetraiodide obtained at lower temperature is more higher in purity than those obtained at higher temperature. It was also found that the impurities were enriched in a wool-like residue. The exothermic reaction of this iodination was comfirmed by the observation of the difference of temperature between the inner and outer part of the reaction tube.抄録全体を表示PDF形式でダウンロード (765K) -
山中 直道, 日下 邦男1962 年 26 巻 2 号 p. 126-130
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThe effect of phosphorus on the properties of 18Cr-12Ni-2.5Mo-type austenitic stainless steels was studied. The results obtained were as follows: (1) The phosphorus addition did not increase the hardness in solution-treated condition, but increased the hardness obtained by aging after solution treatment and improved the mechanical properties. It was considered that the phosphorus increased the strain energy of the austenite lattice which accelerated the precipitation of chromium-carbide particles within austenite grains and hence produced hardening. (2) The austenitic steel containing 0.24%C, 0.2%P, 12%Ni, 17.62%Cr and 2.46%Mo had a yield strength (0.2%) of 81 kg/mm2, elongation of 21% and low magnetic permeability of 1.004 in the hardened condition. (3) Against boiling 40%HNO3 and boiling 20%CH3CO2H solution, the austenitic steel containing 0.2% phosphorus had good corrosion resistance in the hardened condition.抄録全体を表示PDF形式でダウンロード (608K) -
加藤 剛志1962 年 26 巻 2 号 p. 131-135
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーThere have been many reports for the identification of non-metallic inclusions in steel, but none of the reported methods is considered to be fully satisfactory. The author tried to coordinate and suitably combine various identification methods, in order to find the most reasonable one. Firstly, he experimented with many of the reported methods together with new ones such as X-ray microanalysis, and the results obtained were used to discuss their merits and demerits. These methods were then classified into direct and indirect ones. It is concluded that satisfactory identification of non-metallic inclusions in steels cannot be done by only one method and, therefore, the combination of two methods or more should be adopted according to the purpose of the identification.抄録全体を表示PDF形式でダウンロード (1276K) -
椙山 正孝, 藤井 政夫, 小林 啓佑1962 年 26 巻 2 号 p. 136-140
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーIt is well known that the embrittlement (so-called self-annealing) of Al-bronze containing β phase is caused by the transformation β→α+γ2 at slow cooling, and on adequate Mn addition to Cu-Al alloys causes the β phase to stabilize. Then we tried to obtain a chemical composition of Al-Bronze containing β phase for large castings showing no self-annealing by stabilizing β phase. At first, studying the mechanical properties of slow-cooled castings of Cu-Al-Mn system (Al5∼12%, Mn0∼14%), it became known that (α+β) Al-bronze containing 6∼14% of Mn in addition would not undergo self-annealing at slow cooling. Then we improved the mechanical properties of Cu-Al-Mn system by Ni and Fe addition, and obtained the alloys for large castings consisting of the following composition:
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Such Mn-Al-bronzes have excellent proof stress, corrosion resistance to sea water, and show as little change in mechanical properties by variation of the cooling rate as Ni-Al-bronze.抄録全体を表示PDF形式でダウンロード (805K) -
矢島 悦次郎, 古沢 浩一1962 年 26 巻 2 号 p. 141-144
発行日: 1962年
公開日: 2008/04/04
ジャーナル フリーWe reported in the previous report that we obtained hard and thick hardened layers when Cr-Ti steels (Ti=2∼3%) were nitrized. But the hardness gradient at the boundary between the hardened and the unhardened parts was too large. Therefore, we intended to improve this defect. We prepared six samples (C:0.2∼0.4, Cr:0∼2.25, Ti:2.0∼2.6) and measured the hardness distribution and tested the heat resistance. The results obtained were as follows: (1) Primary nitriding was carried out at high temperature to increase the depth of nitrization, and the secondary nitriding at 650°C to obtain good results. By this double nitriding the surface hardness was not raised and a distinct peak of hardness appeared at the border point between the hardened and the unhardened layers. (2) Next, the primary nitriding was operated at 600∼675°C for the purpose of raising the surface hardness, and the secondary nitriding was done at a slightly higher temperature than that of primary nitriding (700∼750°C) lower the hardness gradient. By this method, we obtained high surface hardness (VHN:900), small hardness gradient and good surface conditions. The hardness was not lowered by reheating about at 600∼700°C.抄録全体を表示PDF形式でダウンロード (553K)
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