巻号一覧
10 巻 (1960)
- 6 号 p. 371-
- 5 号 p. 309-
- 4 号 p. 227-
- 3 号 p. 149-
- 2 号 p. 3-
- 1 号 p. 1-
10 巻, 5 号
選択された号の論文の10件中1～10を表示しています
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橋本 宇一1960 年 10 巻 5 号 p. 309-310
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーPDF形式でダウンロード (829K) -
杉山 昇1960 年 10 巻 5 号 p. 311-316
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーIn order to determine the quality of bauxite, ie, alumina extraction yield, amount of alkali loss and amount of red mud, extraction tests are usually carried out. In some cases, however, more rapid calculatim is desired, even though the accuracy is little less. A simplified caluculation method for alumina trihydrated type bauxite was thus studied for the purpose of estimating the above-said elements from the chemical components of the ore. Particularly, in case of malayan bauxite the caluculation can be more simplified.抄録全体を表示PDF形式でダウンロード (636K) -
池野 尚志, 財満 鎮雄, 柴田 喜三1960 年 10 巻 5 号 p. 317-321
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーExperiments for studying on earing grown by deep drawing were made by use of blanks from one-way-rolled 2S sheets which were produced through following processes. Three 2S ccp slabs were pre-heated for two, five and seven hours at 500°C respectively. These slabs were rolled under the temperature of 500°C, 510°C and 520°C and then cold-rolled with the reduction rates of 73.4%, 87.1% and 92.9% respectively. Annealing temperature was changed in the range of 265°C-400°C.
From these experiments, it was found out that, compared with the ones from cross-way-rolled sheets, blanks from one-way-rolled sheets make much more remarkable 45°-earings, when deep-drawn. As the reduction rate increases, the 45°-earings become more remarkable. when the reduction rate is low and annealing temperature is beyond the recrystallization temperature, the 45°-earings are passed into 0°-or 90°-earings.
But, when the reduction rate is high, the 45°-earing does not disappear. The effect of the difference of pre-heating time was so slight that it could not be expressed as a general inclination. The effect of rolling temperature was also not so remarkable. On the other hand, the directionality of these sheets were detected through the Knoop ratio. It wao found out that the ratiom of (maximum Knoop ratio)/(mean knoop ratio) shows the similar inclination to the growth of earings, and thus the directionality of sheet can be found by Knoop ratio. From this experiment, it was proved that Knoop ratio can be used for detecting the directionality of sheet, as previously proposed by the auther.抄録全体を表示PDF形式でダウンロード (671K) -
ZrAl3の析出現象およびAl-Zr合金の再結晶温度におよぼすSi,Mgの機構山田 始1960 年 10 巻 5 号 p. 322-329
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーIn the report No. 3, it was stated that when the rapidly solidified Al-Zr alloy is treated by prceipitation method, the effect of zirconium on elevation of recrystallization temperature is particularly remarkable.
It is considered that this phenomenon is due to the fact that the recrystallization is remarkably prevented by fine ZrAl3 which is precipitated from the supersaturated solid solution of Al-Zr alloy. It is very difficult, however, to observe the precipitation of ZrAl3 by microscope. That is why, in the report No. 3, it was examined by the measurement of the electric resistance.
In this report, the precipitation was examined by means of X-ray diffraction analysis, and also, the mechanism of Si and Mg on the recrystallization temperature of Al-Zr alloy was examined.
The findings are summed up as follows:
1. From the X-ray diffraction analysis, it was more clearly confirmed that zirconium added to aluminium becomes supersaturated solid solution through rapidly cooled solidification phenomenon and, when the preciptation treatment is given, it is precipitated as ZrAl3 in very fine form.
2. The mechanism of Si on the recrystallization temperature of Al-Zr alloy was found out as follows: When rapidly cooled solidification is given to the alloy, Si decreases solubility of zirconium into aluminium, and zirconium precipitates as the form of Zr5Si3. In this case, however, as a certain amount of zirconium dissolves into aluminium, the effect of zirconium is not remarkably prevented. But, when the precipitation treatment is given, the effect is remarkably prevented, because the precipitation of zirconium as the form of Zr5Si3 it more promoted.
3. The mechanism of Mg on the recrystallization temperature of Al-Zr alloy was found out as following: When precipitation treatment is given, ZrAl3 becomes hard to precipitate and, therefore, the effect of zirconium is not remarkable as in the case that Zr precipitate in the fine form of ZrAl3. Mg does not work so much as Si in the precipitation treatment.
4. Si and Mg increase the recrystallization rate of Al-Zr Alloy to which the precipitation treatment is given, But they make grain size finer because they remarkably increase the nucleation rate.抄録全体を表示PDF形式でダウンロード (1892K) -
最大光輝法および光像法小原 嗣朗1960 年 10 巻 5 号 p. 330-336,329
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーTwo simple methods for determining orientations of single crystals, the etch-glitter method (Barrett's method) and the light figure method, were studied for the pourpose of applying to the aluminum specimens in the plate from. The Barrett's reagent was used as etchant for both methods. Investigations were carried out on various factors affecting the accuracies of the methods; etching time, orienation of crystal, condition of the surface, purity of aluminum, and temperature of etchant.
The accuracies of those methods are varied especially by the orientation of crystal and are greatly reduced for the specimens with a surface nearly paralleled to the (100) plane because of the enhanced resistance to attack by the etchant. For high-purity aluminm (99.99% Al), attack by the etchant is not uniform but concetrated on a few etch-pits, so it is hard to determine the orientations of high-purity aluminum crystals by means of those methods.抄録全体を表示PDF形式でダウンロード (2807K) -
機械的性質および反射能に及ぼすSi,Cuの影響川島 浪夫, 福地 登1960 年 10 巻 5 号 p. 337-340
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーReflectal alloy (99.99% Al addded 0.5-2.0% Mg) is now widely used for reflector, jewellery, fittings etc. in every country.
It is well-known that this alloy is the non-heat-treatable one and has an excellent brightness after electrolytically polished and anodized. However, its hardness and tensile property are not enough for some special uses. The authors carried out the experiment on the heat-treatable Al-Mg-Si-Cu alloys (Mg-0.7%, Si-0.2, 0.3, 0.4% Cu-0.1, 0.3, 0.5, 1.0%) based on super-purity aluminium in order to find out improved mechanical properties without deterioration of reflectivity.
From this experiment, it was found out that Al-Mg (0.7%)-Si(0.3%)-Cu(0.4%) alloy has the best properties having 100-110 V. H. N., 80% of reflectivity and 28kg/mm2 of tensile strength in the T6 temper.抄録全体を表示PDF形式でダウンロード (448K) -
特に2024クラツド板について磯野 英二1960 年 10 巻 5 号 p. 341-347
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーExperiments were made, through tensile, electric conductivity and corrosion tests, to examine the effects of cold-working on the aging characteristics in 2024, 7075 and 6061 aluminium alloys, which are for aircraft skin materials.
Findings are as follows: The effect of cold-working is remarkably different according to the chemical composition of alloys; it is notable in 2024 alloy but little in 7075 and 6061. For 2024 alloy, the starting time of artificial aging after solution treatment and cold-working is very important. It should be started after completion of natural aging to get maximum strength. On the other hand, 6061 and 7075 alloys have split aging effect when cold-worked.抄録全体を表示PDF形式でダウンロード (831K) -
池野 尚志, 大塚 一郎1960 年 10 巻 5 号 p. 348-352
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーThe effect of oxalic acid on the properties of anodic oxidation films produced by sulphuric acid process and the effect of some impurities in both on the films were studied.
The findings are summed up as follows:
(1) The properties of films are influenced by the concentration rate of sulphuric acid much more than by that of oxalic acid. The addition of oxalic acid does not make any sence, when the concentration rate of surphuric acid is 15% (volume), because under such situation, the addition of oxalic acid does not work much for the improvement in electrolytic efficiency and properties of anodic films. When 1-3% oxalic acid is added to sulphuric acid of low concentration of 4-6%, the electrolytic efficiency increases about 10% and erosion resistance of the films is considerably improved. The corrosion resistance is also improved in such case.
The films thus produced is clear and colourless and has no fault like pittings.
(2) Even if moe than 3% of oxalic acid is added the properties of film, for example, increase in thickness, does not improved much. But oxalic acid has a great preventable effect for formation of two layers distribution which takes place by increase in temperature.
(3) The film produced in the bath of low concentration of sulphuric acid and oxalic acid is very compact. It has, therefore, high erosion resistance but has low dye absorption property. In order to obtain good absorption property, longer time of oxidation is necessary than in the case of simple sulphuric acid bath.
(4) Effect of Al ion on the properties of film is almost same as in the case of simple sulphuric acid bath. Effect of anions such as NO3 ino and Cl ino is much bigger than those of cation such as Fe and Cu ion.抄録全体を表示PDF形式でダウンロード (642K) -
市川 理衛1960 年 10 巻 5 号 p. 353-359
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーGrain refining effect of Zr on magnesium is caused by Zr which solves into molten magnesium alloy. A study was made on solubility of Zr in molten magnesium alloy and effect of Zr on cast structure of such alloy, when one of such metals as Ag, Al, Be, Bi, Ca, Cd, Ce, Cu, Fe, Li, misch metal, Mn, Pb, Si, Sn, Th, Ti and Zn is contained in magnesium as an alloying element.
The solubility of Zr at the temperature of 700°C is; 0.5-0.6% in Mg-Ag-Zr, similar to Mg-Zr binary alloy in Mg-Be-Zr, about 0.45% in Mg-Bi-Zr, 0.5% in Mg-Ca-Zr, 0.55-0.6% in MgCd-Zr, 0.5-0.55% in Mg-Ce-Zr, 0.4-0.5% in Mg-Cu-Zr, 0.35-0.5% in Mg-Li-Zr, 0.55-0.6% in Mg-Misch metal-Zr, 0.4-0.5% in Mg-Pb-Zr, more than Mg-Zr benary alloy in Mg-Th-Zr, 0.45% in Mg-Ti-Zr, 0.75-0.8% in Mg-Zn-Zr and considerably dicreases in Mg-Sn-Zr as Sn increases. Solubility of Zr in magnesium is remarkably prevented by Al, Fe, Mn and Si contained. Solubility of Zr in Mg-Zn-Zr containing Al, Fe, Mn and Si is not so decreased as in the case of Zn being not contained.
The grain refining effect of Zr on the cast structure is dependent on the quality of Zr which is to be solved in molten alloys.抄録全体を表示PDF形式でダウンロード (2907K) -
市川 理衛1960 年 10 巻 5 号 p. 360-368
発行日: 1960年
公開日: 2009/09/04
ジャーナル フリーThe possibility that a parts of alloying elements and Zr which are over the solubility limit in molten Mg alloys make intermetallic compounds was investigated by x-ray analysis. In this experiment 17 kinds of alloying elements were used. When Zr and unfavorable elements such as Al, Fe, Mn and Si are in molten magnesium, Zr makes intermetallic compounds with these elements, i. e., Al3Zr in Mg-Al-Zr, Fe2Zr in Mg-Fe-Zr, Mn2Zr in Mg-Mn-Zr and SiZr2 in Mg-Si-Zr. Such intermetallic compounds are also made in Mg-Cu-Zr and Mg-Sn-Zr. In other alloys, however, such intermetallic compounds were not observed under the same testing conditions and alloying contents.抄録全体を表示PDF形式でダウンロード (818K)
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