巻号一覧
15 巻 (1965)
- 6 号 p. 333-
- 5 号 p. 273-
- 4 号 p. 201-
- 3 号 p. 139-
- 2 号 p. 83-
- 1 号 p. 1-
15 巻, 6 号
選択された号の論文の8件中1～8を表示しています
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小林 藤次郎1965 年 15 巻 6 号 p. 333-334
発行日: 1965/11/30
公開日: 2008/10/30
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森永 卓一, 高橋 恒夫, 山下 順一郎1965 年 15 巻 6 号 p. 335-339
発行日: 1965/11/30
公開日: 2008/10/30
ジャーナル フリーA study was made to explain the effects of Cr and Mn on the mechanism of aging and anti-corrosion properties of Al-Zn-Mg permanent mould casting alloys; the one containing 3% Zn and 1.8% Mg as basemetal and the others containing further 0.3% Cr and 0.3% Cr+0.5% Mn being added to the basemetal.
The results obtained are summariged as follows:
(1) In the experiments of the natural aging at room temperature, hardness approximately approaches to a stable state since 28-35 days after the casting.
Hardness of the alloys of the basemetal-Cr and basemetal-Cr-Mn is slightly higher than that of the basemetal.
2) In the T5 treatment, the peak value of strength is obtained by the treatment for 12hr at 160°C.
3) In the measurement of electrode-potential, high potential is obtained by the alloy of Cr and Mn addition on by hear-treatment. The potential of 3% Zn-1.8% Mg system alloys is higher than that of 4% Zn-2% Mg system alloys.
It is expected that the above experimental results would be helpful to the future studies on welding structual alloys.抄録全体を表示PDF形式でダウンロード (670K) -
竹内 寛司, 小林 啓行, 菊地 隆士1965 年 15 巻 6 号 p. 340-347
発行日: 1965/11/30
公開日: 2008/10/30
ジャーナル フリーThis study is of obtaining an experimental equation by which the maximum extrusion pressure may be calculated.
The 6063 billets carted in permanent mold which have circular and square sections were extruded by 600 ton-vertical type oil hydraulic press.
Authers obtained the next experimental equation, and found that the equation will be reliable with ±3% error and be able to be applied for other sectional extrusions.
P=9.95(t/305)-λ0×(βlogeA/a+4μ0L/D)
λ0=1.70(v/10)-0.108
μ0=0.52-1.054log(t/305)
P: Maximum pressure of extrusion kg/mm2
t: Extrusion temperature °C
v: Extrusion speed m/min
L: Length of billet mm
D: Diameter of billet mm
β: Shape factor
β=1 For extrusion of the circular section
0.90<β<1 For extrusion of the square section and A/a=Cross sectional area of billet/Cross sectional area of extruded product: Extrusion ratio.抄録全体を表示PDF形式でダウンロード (799K) -
再結晶におよぼす鋳造温度の影響荒木 喬, 小森 進一1965 年 15 巻 6 号 p. 348-353
発行日: 1965/11/30
公開日: 2008/10/30
ジャーナル フリーThe effect of casting temperature responding to Zr content on recrystallization of Al-Zr alloys was investigated.
The results obtained were summarized as follows.
(1) Casting the alloy from the temperature of solid-liquid region, yielding of Zr decreased, segregation of Zr appeared, and the recrystallization temperature became low.
(2) Casting the alloy from the temperature just above liquidus, the yielding of Zr didn't decrease, no segregation of Zr was observed, and the recrystallization became high.
(3) Casting the alloy from the temperature about 100°C above liquidus, the recrystallization temperature was not so high.
(4) Precipitation heat treatment of ingot was effective to level up the recrystallization temperature in the alloy cast from the temperature about 100°C above liquidus.抄録全体を表示PDF形式でダウンロード (630K) -
再結晶におよぼす質量効果の影響荒木 喬, 小森 進一1965 年 15 巻 6 号 p. 354-360
発行日: 1965/11/30
公開日: 2008/10/30
ジャーナル フリーAs the mass of ingots of Al-Zr alloy becomes larger, especially in the case of a Zr rich alloy, the center region constitutes the equiaxed structure and the columnar structure appears in the part of ingot in contact with the mould where the metal is cooled rapidly.
The results are summerized as follows:
(1) The difference in characteristics of recrystallization between the chilled zone and the center were recognized in the case of ingots whose thickness exceed 30mm and in the alloy containing over 0.23wt% of Zr.
(2) The recrystallization temperature of columnar zone is generally high but that of equiaxed structure is not so high. Precipitates become finer and fewer in columnar zone than in the equiaxed zone. Electrical resistance of the drawn wire from the equiaxed zone is also much lower than that of from the columnar zone.
(3) The precipitation heat treatment after cold rolling is effective to level up recrystallization temperature of a Zr dilute alloy, but is not entirely effective to that of an equiaxed zone.抄録全体を表示PDF形式でダウンロード (1497K) -
松島 知夫, 大山 繁1965 年 15 巻 6 号 p. 361-366
発行日: 1965/11/30
公開日: 2008/10/30
ジャーナル フリーThe equilibrium pressure of magnesium over the reaction between magnesium oxide and aluminium was measured by means of the transportation method. The range of temperature was from 1, 000°C to 1, 150°C.
Results are expressed by following equations.
4MgO(s)+2Al(Mg)(l)=3Mg(g)+MgAl2O4(s)
logPMg(mmHg)=-9, 503/T+8.852
The X-ray analysis of the end product showed the formation of the magnesium aluminate.
It was also carried out to determine activities of aluminium in aluminium-iron alloys at 1, 100°C. Some more details of these reactions were discussed making reference to previous works.抄録全体を表示PDF形式でダウンロード (655K) -
松島 知夫, 小野 健二1965 年 15 巻 6 号 p. 367-376
発行日: 1965/11/30
公開日: 2008/10/30
ジャーナル フリーThe nature of IIa Oxides, particularly MgO, CaO and BaO, in cryolite melts was studied by means of the freezing point depression of cryolite. In the binary system of these melts, the displacement reaction accompanied and the formation of fluorides and aluminate were observed by the X-ray diffraction analysis.
As the mechanism of the reaction, it is the most probable that the formation of complex ions of Al2O3- and MgF3- occures in the system of cryorite-MgO, while the formation of AlO2- and the dilution of Na+ by Ca2+ or Ba2+ are almost identical in the system of cryolite -CaO, and -BaO.抄録全体を表示PDF形式でダウンロード (1100K) -
軽金属圧延工業会軽金属圧延技術委員会1965 年 15 巻 6 号 p. 377-389
発行日: 1965/11/30
公開日: 2008/10/30
ジャーナル フリーPDF形式でダウンロード (2605K)
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