巻号一覧
9 巻, 5 号
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村上 陽太郎1959 年 9 巻 5 号 p. 3-4
発行日: 1959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 (776K) -
還元反応に対する考察池田 正夫1959 年 9 巻 5 号 p. 5-12,22
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーFrom the study on the mechanism of reducting reaction on MgO·CaO-Fe-Si system, the following results were obtained.
1. The activation energy of 55, 000cal/mol was obtained on the reduction of MgO·CaO by use of Fe-Si.
2. Metallic iron in Fe-Si has no relation with the reduction of MgO·CaO. The reaction of reduction seemes to be accelerated by the diffusion velocity of Si.
3. The reaction starts at about 988°C, and the relation between the reduction temperature and vapor pressure of Mg shows logp (mmHg)=9.203-11, 091/T.
4. A big difference can be found between the actual measurement and theoretical value on the relation of reducing temperature and vapor pressure of Mg. By X-ray diffraction method, not only Ca2SiO4 but also 3CaO·2SiO2 is found out in the residue.
This may be a cause of the big difference above-mentioned.抄録全体を表示PDF形式でダウンロード (1205K) -
麻田 宏, 小池 吉蔵1959 年 9 巻 5 号 p. 13-16,22
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーThe authors have recently investigated the possibility of increasing the tensile strength of extruded products of aluminium alloys by means of heating prior to solution heat-treatment. The tensile strength of 17S was found to be improved by the preheating at the suitable temperatures. The strengthening effect, however, did not take place when the extruded temperature was lower than 400°C, and also it could not be recognized when manganese is not contained in the alloy.
The favourable preheating temperature for improvement in strength was determined by heating time and extruding temperature. From the above experimental evidences, it was suggested that the strengthening effect by preheating might originated from the con-straining effect for a boundary migration due to the fine precipitated particles of manganese compounds in subboundary regions. Similar strengthening effect can be expected on other aluminiumm alloys containing manganese or chromium besides 17S. Experiments were carried out with respect to the effects of the preheating upon tensile strength and proof stress on alloys 24S, 75S and HD (Al-Zn-Mg type). The results obtained were as followes: The strength of these alloys increased the preheating, especially the effect was observed more remarkable on 17S and 24S than 75S and HD.抄録全体を表示PDF形式でダウンロード (1114K) -
再結晶温度および機械的性質におよぼす効果山田 始1959 年 9 巻 5 号 p. 17-22
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーIt is well known that when Zr is added to aluminium and its alloys, the recrystallization temperature is elevated.
This is a report on the study concerning the effect of Zr to the relation of recrystallization temperature and impurities or alloying elements in aluminium and also on the effect of Zr to the mechanical properties and heat resistance of aluminium as well as Al-Cu base alloys.
Findings are as follows:
1) The higher the purity of the metal, the more remarkable the elevation of recrystalization temperature is.
2) Si as an impurity in aluminium spoil the effect of Zr, while Fe does not.
3) The effect of Zr to the mechanical properties of aluminium and Al-Cu alloys is that the tensile strength of the metal in crease at room as well as the elevated temperature, but in this case Cu content must be less than 2%.抄録全体を表示PDF形式でダウンロード (761K) -
アルミニウムの焼なまし時間と結晶粒との関係およびジルコニウムの影響山田 始1959 年 9 巻 5 号 p. 23-28
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーThe growth rate and activation energy in linear and non-linear growth of recrystallized grain were measured, by use of the commercially pure aluminium of 99.7%, to which 90% of cold reduction had been given, and the formula of the relation between annealing time and grain size of recrystallization was derived.
The effect of Zr in the above-mentioned relation to the recrystallization of aluminium was also examined.
The results are summed up as follows:
1) The relation between annealing time t and grain size D is shown as in the following formula:
D=G·t1+2√G0'·√exp·(-QB/RT)·√t-t1
Where: G=Growth rate in linear part of grain growth
G0'=Coefficient of growth rate in non-linear part of grain growth
QB=Activation energy of non-linear part
R=Gas constant
T=Absolute temperature of annealing
t1=Critical time of linear part of grain growth
2) The effect of Zr to the recrystallization of aluminium remarkably decreases the growth rate in linear part while slightly in non-linear part, whereas the activation energy QB scarecely changes.抄録全体を表示PDF形式でダウンロード (692K) -
美馬 源次郎, 林 正路, 山野 勇1959 年 9 巻 5 号 p. 29-35,51
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーBy means of measuring the room tempeature internal friction, the tensile strength and the elongation, we have studied on the difference effects between successive and single isothermal annealing upon the recovery and recrystallization process of commercial aluminium and high purity aluminium.
Through the experiments we have confirmed that the change of the internal friction and the tensile properties in the recovery process is related to the difference between successive and single isothermal annealing and that is the repetition of recovery annealing treatment, although the change of these properties in the recrystallization process do not effected to the difference of both annealing method. Then the successive isothermal annealing method, for studying the relation between softening phenomenon and annealing temperature, is more effective than the single isothermal annealing.抄録全体を表示PDF形式でダウンロード (2563K) -
菅野 友信, 植原 寅蔵, 斎藤 正郎, 青木 正1959 年 9 巻 5 号 p. 36-44
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーThis report has been prepared on the basis of the statistical data on hard spots in die-cast products of aluminium alloy for the past several years.
Their external appearance was observed and compared with their microscopic structures and hardness obtained through the experimental works. As the result of the above-said study, it was found out that the hard spots could be classified into some types from their external appearances.
Besides the above, chemical analysis was also made on the non-metallic hard spots, alloy slags (oxides) and altered bricks. With respect to the non-metallic hard spots, the following results were obtained.
1) The major components of the non-metallic hard spots are Al2O3, SiO2 and Fe2O3 and Na2O, MgO, TiO2, Cu and some others are also contained through slightly.
2) The composition of the hard spots made of altered brick (which is made by being attacked by molten aluminium alloy) and of aluminium alloy slags are different from that of the non-metallic hard spots in the quantity of the contents of the major components.
3) Accordingly, the non-metallic hard spots are not the altered brick alloy slags themselves, although it is considered that they may be one of the factors for the formation of non-metallic hard spots.抄録全体を表示PDF形式でダウンロード (4211K) -
森永 卓一, 財満 鎮雄, 陣 慶康1959 年 9 巻 5 号 p. 45-51
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーThe anti-corrosion property of the aluminium alloy No. 4C for casting, which has good castability and weldability, and excellent air tightness and shock resisting property, is compared in corrosion test, especially in wet and dry corrosion test, with that of the aluminium alloy No. 7B for casting which is known to have the best anti-corrosion property good mechanical properties in aluminium alloys. This study was made for the purpose of confirming the utilization of No. 4C in industrial use. Recently, the usage of aluminium alloys has been drastically increased and the high anti-corrosion properties of the alloys has been getting more desired. No. 7B alloy requires the high level technique in working and has various problems in pratical uses in spite of its good anti-corrosion property, No. 4 alloy was selected to be studied for the purpose of substituting the No. 7 alloy. The characteristics of the alloy in the case of the periodic wet and dry corrosion test was particularly examined. (3%NaCl 0.15%H2O2) solution was used for this test.抄録全体を表示PDF形式でダウンロード (2139K) -
不純物を含むアルミニウムの電解研磨(第2編)(3)中山 孝廉1959 年 9 巻 5 号 p. 52-56
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーThe reflectivity of electro-polished aluminium sheet is generally decreased when it is anodized. This is due to the existance of thick film on the surface of it. The reflectivity is, therefore, dependent upon the state and quantity of separated constituents included. When these material is heat-treated so that these separated constituents dissolved are into solid solution, the reflectivity of the metal is improved.
Through the experiments, it was found out that the reflectivity of 70% or more on the electropolished and anodized surface can be obtained in the cases that pure aluminium contains following impurities respectively:
Fe content: 0.007% or less
Si content: 0.012% or less
Cu content: 0.01% or less
Mg2Si content: 0.27% or less
It was also found out that magnesium conbines silicon in the material and increases the reflectivity.
From the above, it can be confirmed that, as konwn, high purity aluminium or high purity aluminium containing a little Mg must be used for obtaining high reflectivity of electro-polished and anodized products.抄録全体を表示PDF形式でダウンロード (797K) -
振動電解研磨法の工業的応用(第3編)中山 孝廉1959 年 9 巻 5 号 p. 56-66
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーAlthough this process was invented 24 years ago, it is since about 1950 that this has been industrially applied in various fields.
In 1957, approximately 120 tons of products of this kind were marketed in Japan. The major samples were as follows:
Reflectors, Flood lights, Shades, Reflecting plates, Crests, Marks, Advertising apparatus, Ornamental applications, etc.抄録全体を表示PDF形式でダウンロード (4387K) -
Ni,Cr,Co,Vの影響中村 雄造1959 年 9 巻 5 号 p. 67-71
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーThis report is on the experiment for obtaining the electrolytic condenser, which has higher electro-static capacity, shorter formation time and smaller leakage current, by use of super purity aluminium of 99.99% added with Ni, Cr, Co and V respectively.
Findings are as follows:
1) Addition of 0.003-0.018% Co to 99.99% Aluminium gives the best effect to the dielectric properties of the oxide film.
2) Addition of Ni gives good effect, though a little, to those properties.
3) Addition of Cr and V does not give any good effect.
4) As has so far been made known by the writer, the recrystallized grain with {100} or {111} orientation shows higher electrostatic capacity compared with that with {110} orientation. The foil of high purity aluminium after added with Co and annealed has numorous {100} grains but no {110} one. On the other hand, the same foil added with V has {110} grains and few {100} grains.
It was thus re-confirmed that the electrostatic capacity is mainly dependent on the orientations of recrystallized grains.
5) Higher the annealing temperature, higher the electrostatic capacity can be obtained. But smaller the quantity of added element, more the effects for this purpose.
The high purity aluminium foil added with Co shows higher electrostatic capacity regard-less of the temperature for annealing.
It was found out, therfore, that 99.99% aluminium foil containing 0.008-0.02% of Co is easily etched and gives deeper pits and that this gives the best dielectric property to anode for the electrolytic condenser after formation at 500 volts.抄録全体を表示PDF形式でダウンロード (1262K) -
52Sに対する各種下処理法およびほうろう掛けが素材の機械的性質に及ぼす影響について石原 宗利, 望月 文男, 河原崎 幸生1959 年 9 巻 5 号 p. 72-80
発行日: 1959年
公開日: 2009/09/04
ジャーナル フリーWhen lead compound frit is enamelled on 52S alloy sheet, the sheet must be pre-treated, as reported in previous time, to give it the weather resistance. This is a report concerning study on the pre-treatment methods and the findings are as follows.:
1) Almost similar results are obained through such chemical oxidation methods as alodine method, alrock method, Du Pont method and the method by use of mixed solution of sodium carbonate, water glass and ammonium persulphate.
2) To obtain the whiteness of the enamel, the anodising method is more suitable than the chemical oxidation method.
3) Of anodising methods, the sodium perborate solution method appears to be the most applicable for getting better adhesiveness but the disadvantage of this method is that it needs a comparatively large electric power consumption.
4) In case of using water glass solution, the anodising under A. C. 40V up and 30 seconds at room temperature by use of 4% solution is adequate for good enamelling.
The study on the mechanical properties of enamelled aluminium alloy sheet was also made and the following findings were obtained:
1) In case of 2S-H sheet, being treated at 530°C, while its tensile strength decreases, the elongation increases, as annealed.
2) When 61S-T4 sheet is treated under the same conditions, its tensile strength decreases, but when artificially aged at 185°C for 8 hours, the tensile strength in regained to the point which 61S-T6 sheet has.
3) When 24S-T4 sheet is enamelled 500°C, the decrease in tensile strength is comparatively small.抄録全体を表示PDF形式でダウンロード (1180K)
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