巻号一覧
35 巻, 11 号
選択された号の論文の17件中1～17を表示しています
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国枝 義彦, 沢本 八衛, 沖 猛雄1971 年 35 巻 11 号 p. 1017-1021
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe dissolution reaction of ZnS in the aqueous solution of sulfuric acid was separated into the following types; the H2S evolution type, the SO42+ production type and the S° production type. The third type, a useful reaction for hydrometallurgy, was accelerated by the addition of CuS to ZnS. In this experiment, the outer polarization curves of various electrodes and the inner polarization curves on dissolution of ZnS were measured to clarify its reaction mechanism. The experimental results obtained are as follows:
(1) The dissolution of ZnS was dependent upon the potential of the specimen and occurred anodically.
(2) The better the contact of mixture ZnS and CuS, etc. and the lower pH of the region in which H2S did not evolve, the larger became this dissolution current.
(3) At the area contacted with CuS, PbO2 and graphite added, ZnS was dissolved by the anodic reaction, ZnS=Zn2++S°+2e. As the cathodic reaction, the reduction of the dissolved oxygen, 2H++1/2 O2+2e=H2O, occurred on the other area of their surface. In the case of CuS and graphite additions, the dissolution reaction of ZnS was considered as the anode control reaction, and in the case of PbO2 addition, the mixed costrol.抄録全体を表示PDF形式でダウンロード (1211K) -
室町 繁雄, 前 健彦1971 年 35 巻 11 号 p. 1021-1027
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe effects of additional element Sn on GP zone formation and transition phase precipitation were investigated by measurments of the change of the age-hardening and electron micrograph observations. The results obtained were summarized as follows:
(1) The behavior of aging at a temperature below 190°C was delayed by the effect of additional element Sn. This effect became more remarkable with decreasing temperature.
(2) At aging temperatures above 230°C, the rate of age-hardening was increased and the size of the precipitate became smaller by the addition of Sn.
(3) The critical temperature of the aging behavior was decreased and the reaction order of the precipitation was increased at a temperatures below the critical temperature by the effect of additional element Sn.
The above results can be explained by the facts that GP zone formation is delayed and the frequency of the nucreation of transition phase is increased by the effect of additional element Sn.抄録全体を表示PDF形式でダウンロード (2213K) -
田村 良雄, 藤井 忠行, 大庭 幸夫1971 年 35 巻 11 号 p. 1027-1031
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe electrolytic and chemical etching conditions for revealing dislocation pits and light figures on the principal planes of the zone-refined tungsten single crystals were as follows:
(1) Clear dislocation pits on the(001) plane were easily produced by either electrolytic etching or chemical etching as already reported and dislocation pits on the(111)plane were obtained by electrolytic etching in(16%NaOH+picric acid 4 g)electrolyte. Dislocation pits on the(110)plane were not revealed even in the various etching conditions.
(2) Etching figures from which clear light figures on the (001),(111) and (110) planes could be obtain were revealed by either chemical etching in {30%K3Fe(CN)6 [1 part]+3%NaOH [1 part]} solution or electrolytic etching in sodium hydroxide solution added picric acid.抄録全体を表示PDF形式でダウンロード (1915K) -
野田 泰稔, 井垣 謙三1971 年 35 巻 11 号 p. 1031-1034
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe determination of the P-T phase diagram of the Co-Se system has been made. The regions of the (CoSe1.03), (CoSe1.13) and (CoSe1.30) phases are shown together with that of the CoSe2 phase. The relation between the melting point of the specimen in these three non-stoichiometric phases and the selenium pressure is illustrated by solid-liquid-gas coexisting curves, which take the maximum temperatures in the respective regions. The boundary between the (CoSe1.30) and CoSe2 phases was determined by means of the Bourdon gauge. Metallic cobalt phase is recognized in the region whose pressure is lower than that of the (CoSe1.03) phase.
The necessary care to be taken on preparing the specimen for the system containing a volatile component is also mentioned.抄録全体を表示PDF形式でダウンロード (1320K) -
福井 利安1971 年 35 巻 11 号 p. 1035-1041
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーExperiments were carried out on the effects of Fe and Si contents on the notch toughness of Al-Zn-Mg alloy plates and sheets. The notch toughness was evaluated by the Charpy impact value, notch-tensile and yield ratios and tear properties.
The notch toughness of T 4-and T 6-treated Al-Zn-Mg alloys was reduced markedly with increasing amounts of Fe and Si as impurities, though it was considerably influenced by tempering conditions of plates, notch directions, testing temperatures and so on.
According to the increase in Fe and Si contents, the dimple pattern associated with ductile fracture tended to turn into a quasi-cleavage pattern associated with a comparatively brittle fracture, showing the intergranular rupture. It was considered that the crack propagation in Al-Zn-Mg alloy plates and sheets was closely related to the distribution of second phases containing Fe and Si.抄録全体を表示PDF形式でダウンロード (1726K) -
福井 利安1971 年 35 巻 11 号 p. 1041-1045
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーExperiments were carried out on the effects of Fe and Si contents on the notch toughness of Al-Zn-Mg alloy weld metals and their fracture characteristics.
The notch toughness of Al-Zn-Mg alloy weld metals was reduced considerably with increasing amounts of Fe and Si, while it was generally poorer than that of base plates. Fe, Si and Fe+Si, if these contents were equal, had almost the same influence on the notch toughness, but strictly speaking, the influence of Si was most remarkable.
Transgranular cracking or rupture was observed in a weld metal with low Fe and Si contents, but intergranular cracking was likely to appear in that with high Fe and Si contents. By electron fractography, the former showed a dimple pattern but the latter was apt to show a quasi-cleavage pattern.抄録全体を表示PDF形式でダウンロード (2153K) -
村上 雄悦1971 年 35 巻 11 号 p. 1046-1050
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe magnetic and electrical properties of Ni-Mn alloys containing less than 25.70%Mn melted in argon atomosphere have been measured in various states of heat-treatments. The Ni-20.50%Mn alloy showed the highest initial permeability of 24500 when cooled at a rate of 10°C/hr from 650°C after heating at 1150°C for 3 hr in hydrogen gas and the highest maximum permeability of 93000 when further baked at 400°C for 8 hr. These values are considerably larger than the initial permeability of 6860 and the maximum permeability of 20400 for Ni-Mn alloys containing 21.91 and 22.00%Mn, respectively, which were melted in air, cooled at 10°C/hr after heating in vacuum at 900°C for 1 hr and then baked at 380°C for 50 hr as reported in the previous paper. The Ni-20.50%Mn alloy having the highest maximum permeability exhibited a magnetic hysteresis loss of 2.73 erg/cm3/cycle and a coercive force of 0.0048 Oe for a maximum magnetic induction of 2000 G; its intrinsic magnetic induction and electrical resistivity were 1970 G (H=10 Oe) and 56.5 μΩ-cm (20°C), respectively.抄録全体を表示PDF形式でダウンロード (1560K) -
新井 隆, 依田 連平1971 年 35 巻 11 号 p. 1050-1055
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーHigh temperature properties of the composite material which was coated with various heat-resistant alloys with a view to using molybdenum at elevated temperature in air under high stressed condition have been reported. When a core material was changed from molybdenum to tungsten to improve the creep-rupture strength, the following results were obtained:
(1) Tungsten and both heat-resistant alloy melts are bonded by fusion perfectly in air.
(2) This material is capable to be hot-swaged by reducing the reduction per a pass.
(3) The creep-rupture life was improved considerably by varying the core material from molybdenum to tungsten.
(4) A reciprocal relation was obtained between the creep-rupture strength and the secondary creep rate in the temperature range of 1000° to 1200°C.
(5) It was observed the surface oxidation of the coating alloys during creep-rupture test had no effects on the life time at 1000°C.抄録全体を表示PDF形式でダウンロード (1881K) -
河野 礼四郎, 橋本 雍彦, 川崎 博三, 矢田 義正, 田村 敏男, 平井 勝1971 年 35 巻 11 号 p. 1055-1062
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe electrorefining of Ti from (α+δ) Ti-C-O anode materials containing about 3∼5% and 6∼3%O was carried out in 500 A- and 2000 A- scale cells with a fused NaCl-TiClx electrolyte (total Ti content: 3∼12%) at 850°C for an industrial application of titanium production. A comparatively high anodic current density such as 20 A/dm2 DA was used for this purpose.
35∼45%Ti of the anode materials could be cathodically extracted and the purity of the metal deposit was comparable with that of industrial Ti sponge. These results agreed approximately with the data of Takeuchi et al. at the DA of about 3∼7 A/dm2.
At a low concentration of total Ti(3%)in molten electrolyte, a high current efficiency was obtained. Regardless of the Ti contents in the electrolyte, the hardness of the deposited Ti increased and the current efficiency decreased with the advance of electrolysis.
This was considered to be due to the decrease of aTi and the increase of aO in the anode materials.
From the 2000 A-scale experimental data, the electric power consumption was 6.14 kWh/kg Ti in D.C. and 18.8 kWh/kg Ti for heating.抄録全体を表示PDF形式でダウンロード (2332K) -
武井 英雄, 中佐 啓治郎1971 年 35 巻 11 号 p. 1063-1067
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe investigation was carried out with the carbon steel S 40 C on the superplasticity phenomena under constant load at a temperature within the ferrite+austenite region, and during the temperature cycling through A1-A3 transformation. The results obtained are as follows:
(1) At the test temperatures in the ferrite+austenite region, the creep strain in the case of heating the specimen directly to the test temperature is greater than that in the case of cooling the specimen to the test temperature after over-heating to 820°C. The larger creep strain observed at the temperature near 740°C is considered to be a kind of superplastic strain due to microduplex structure.
(2) Besides usual creep strain, the transformation strain occurs during the temperature cycling through A1-A3 transformation under constant load, and it increases with increase in the temperature cycling rate.
(3) The strain-rate sensitivity exponent m is 0.44 and 0.68 respectively in the creep test at 740°C and in the temperature cycling creep test between 700°C and 820°C at a cycling rate of 4 times per hour.抄録全体を表示PDF形式でダウンロード (1607K) -
武井 英雄, 中佐 啓治郎1971 年 35 巻 11 号 p. 1067-1072
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe effects of conventional quenching, roll-quenching and repeat-quenching on the tensile properties and the pop-in plane-strain fracture toughness KIC were investigated with Cr-Mo Martensitic steel. The results obtained are as follows:
(1) The fracture toughness KIC is increased without loss of the strength by the conventional quenching from 1150°C rather than 850°C, when the tempering temperature is lower than 400°C.
(2) The fracture toughness KIC and the tensile strength are improved by the roll-quenching from 850°C, but this effect decreases with the increase in roll-quenching temperature.
(3) The repeat-quenching has little effect on raising KIC.
(4) The larger KIC resulted from conventional quenching from 1150°C or roll-quenching from 850°C may be explained by the presence of retained austenite.抄録全体を表示PDF形式でダウンロード (1776K) -
牧 正志, 下岡 貞正, 梅本 実, 田村 今男1971 年 35 巻 11 号 p. 1073-1082
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe relation between the formation temperature and the morphology of strain-induced and thermally transformed martensites in several Fe-Ni-C alloys was studied by means of optical and transmission electron microscopy. The morphology of strain-induced martensite changed with the formation temperature(deformation temperature)even in the same alloy. Three types of strain-induced martensites were recognized in the temperature range between 0° and −196°C, namely, butterfly-like dislocated martensite formed at the temperatures between 0°C and −60°C, lenticular partially or completely twinned martensite with the mid-rib formed at −20°∼−150°C and thin plate-like completely twinned martensite without the mid-rib formed at −150°∼−196°C.
The Ms temperature was remarkably depressed with decrease in austenitizing temperature in these alloys. Therefore, the relation between formation temperature and morphology of thermally transformed martensite was clearly determined in the same alloy by utilizing this phenomenon(thermal stabilization of austenite). The morphology of thermally transformed martensite also changed with the formation temperature even in the same alloy. Three types of martensites were also observed, and they were similarly formed in the same temperature range as the strain-induced martensite. It was considered that the morphology of martensite (both strain-induced and thermally transformed martensites) in Fe-Ni-C alloys was controlled by the formation temperature.抄録全体を表示PDF形式でダウンロード (5382K) -
榊 隆1971 年 35 巻 11 号 p. 1082-1088
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーAn expeaiment was carried out to establish a simple and accurate method for the determination of microamounts of tin in high alloy steel.
The tin was separated from various elements by coprecipitating the tin with beryllium as hydrooxide in an ammoniacal solution containing EDTA and extracting the tin as iodide with benzene in a sulfuric acid solution containing tartaric acid. By using jointly these separation methods, microamounts of tin could be separated accurately from large amounts of chromium,cobalt,copper,iron,molybdenum, niobium,nickel,tantalum,titanium,tungsten,vanadium,zirconium and others.
The separated tin was determined by the spectrophotometric method with quercetin. The tin-quercetin complex is formed quantitatively in an acetic acid-sodium acetate medium having pH 4.8 to 5.5 containing L-ascorbic acid. This complex is extracted quantitatively and readily with benzene and is dissolved well in ethyl alcohol. The absorptin maximum of this complex in benzene-ethyl alcohol is at a wavelength of 393 nm. Alminum, antimony, copper, molybdenum, niobium, tantalum, titanium, tungsten, vanadium and zirconium interfere with the determination of tin by the spectrophotometric method with quercetin. (B-E is an abbreviation for benzene-ethyl alcohol as reference solution in the figures.)
As a result of the experiment, the present author succeded in establishing a method in which 0.0005 to 0.025% of tin in high alloy steel can precisely be measured without difficulty.
The tin contents in synthetic and actual samples were measured by this method with satisfactory results.抄録全体を表示PDF形式でダウンロード (2388K) -
小山 伸二, 石井 輝雄, 成田 貴一1971 年 35 巻 11 号 p. 1089-1094
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe influence of manganese, silicon, chromium and nickel on the solubility of niobium carbide in iron austenite have been studied on iron austenites containing various quantities of these elements with niobium by the method of equilibration with methane-hydrogen mixture gas. Manganese and chromium increased the solubility of NbC remarkably. Nickel increased the solubility of NbC in comparatively low temperature range. But at higher temperature the effect was weak. On the contrary, silicon decreased the solubility of NbC. Such effects are attributed to the effect of each element on the activity of niobium as well as that of carbon.
Solubility product of NbC in iron austenite containing manganese, silicon, chromium or nickel is described by the following experimental equations, respectively:
(This article is not displayable. Please see full text pdf.)抄録全体を表示PDF形式でダウンロード (2028K) -
辻 新次, 山中 久彦1971 年 35 巻 11 号 p. 1095-1099
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーThe general method for obtaining the interdiffusion coefficients \ ildeD in multi-phase diffusion is described for the case where the partial molal volum \barV of diffusing components shows a gap between the two phases which borders on the interface in the binary diffusion couple. When \ ildeD and \barV in each phase of the couple are considered to be constant, easily applicable relations for obtaining \ ildeD are deduced by employing a parameter which shows an apparent concentration of the substance moving in or out the interface. In case \ ildeD and \barV vary with composition, it is shown \ ildeD in each phase can be determined by using another parameter which expresses the relation between the moving rates of the interface and by modifying a part of Balluffi’s equation.抄録全体を表示PDF形式でダウンロード (1663K) -
湯川 夏夫, 飛田 守孝, 井村 徹, 水野 義勝1971 年 35 巻 11 号 p. 1100-1101
発行日: 1971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 (189K) -
1971 年 35 巻 11 号 p. 1101
発行日: 1971年
公開日: 2008/04/04
ジャーナル フリーPDFを参照． （誤）0.1%当りの応力(kg/mm2), Fig. 7 （正）0.01%当りの応力(g/mm2), [PDFを参照]抄録全体を表示PDF形式でダウンロード (19K)
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