巻号一覧
16 巻, 12 号
選択された号の論文の16件中1～16を表示しています
- |<
- <
- 1
- >
- >|
-
佐藤 知雄, 金子 秀夫, 増本 剛1952 年 16 巻 12 号 p. 637-639
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーThe main causes of the aging of selenium rectifier are the change of electrical resistance of blocking layer and that of selenium layer. To make clear the phenomenon based on the later cause and to supply some fundamental data for the prevention of aging of the rectifier, the present authors have measured the change of the electrical resistance of selenium layer when it is heated under various conditions. The results obtained are as follows: the electrical resistance of selenium containing chlorine or bromine increases rapidly for the first few days of the aging period and thereafter shows constant resistance, while that of selenium containing iodine increases slowly during all period. Under the condition of high temperature and humidity, the increase of resistance is comparatively large. Considering the character of the rectifying plate from the stand point of electrical conductivity, therefore, selenium containing chlorine gives the best result, but from the stand point of aging, it is considered that selenium containing iodine is the most stable.抄録全体を表示PDF形式でダウンロード (420K) -
岩瀬 慶三, 佐野 忠雄, 京谷 益次1952 年 16 巻 12 号 p. 639-643
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーIt was shown in the previous papers(3) by the present authors that the cooling stress restored in the steel cooled from its austenitic state to the temperature just above the Ar″ change disappeared with the occurrencc of the suit change. From this fact, it seems to the present authors that if the distribution curve of the mechanical, welding or other stress restored in the sepecimen is locally cut off by heating a part of the specimen to a certain temperature at which the recrystallization or stress release of that part of the specimen takes place, the adjacent or remaining part of the specimen being protected against the temperature elevation by cooling with cold running water, then the balance of the stress distribution will be changed. By the proper choice of the part of the specimen to be heated, the stress restored in the specimen may be greatly diminished by such a heat treatment. This supposition proved to be realizable in the present paper, in which 4/6 brass and heat-treated steel were used as specimens. Each specimens were 2 mm round disc, cold drawn or cold drawn and then subjected to rolling. The effective part of the stress distribution curve to be cut by heating in order to minimumize the stress of the specimen after such a heat treatment was found to be the part at which the stress was high and the inclination of the distribution curve was steep. It was also proved that the heating of such a part at which the distribution curve cuts the neutral line or heating of the minimum or maximum point on that curve was not effective for stress release.抄録全体を表示PDF形式でダウンロード (895K) -
岩瀬 慶三, 佐野 忠雄, 京谷 益次1952 年 16 巻 12 号 p. 644-648
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーIn the previous paper, the present authors showed that the residual stress restored in the cold worked specimen might be released by local heating. A similar treatment was applied to a welded steel plate and a satisfactory result was obtained. A low carbon steel plate (thickness=3 mm), electrically-welded was used as a specimen. The stress distribution in the specimen is shown in Fig. 1∼3, In the figure the individual parts to be heated are marked as a, b, c, AB, ect, the width of each part being 5∼10 mm. These parts were heated to 650° separately or at the same time. The results obtained are as follows: (1) When the part at which the distribution curve is very steep was heated, it was effective to release the stress as shown in Fig. 1. And when these parts were heated individually one after another, stress release was very remarkable, but if these parts or tensile stress area where heated at the same time, it was not effective at all. (2) If the temperature of heating was elevated to 1000° the effect was naturally far greater than that when lower temperature was applied.抄録全体を表示PDF形式でダウンロード (811K) -
田中 実1952 年 16 巻 12 号 p. 648-651
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーUsing the small impact and static cutting machines designed by the writer, the cutting energies of metals and alloys, such as lead, tin, aluminum, copper, copper-zinc alloys, tin-lead alloys and lead brass (60% copper, 1∼2% lead) were measured. From the results, it was known (1) that the ratio of the impact and static cutting energies was 1.5∼2.0; (2) that the cutting energy and tensile strength held a inear relation in these metals and alloys except lead brass, (3) that the cutting energy of brass (60% copper) would be decreased by 20∼30% by alloying 1∼2% of lead.抄録全体を表示PDF形式でダウンロード (718K) -
多賀谷 正義, 田村 今男1952 年 16 巻 12 号 p. 652-655
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーThe cooling curves of concentrated solutions of various salts were measured by means of the apparatus and method described in the 1st report, but the specimen was improved. The cooling process of concentrated salt solutions in which the solubility decreases with the rise in bath temperature, is excellent for general steel quenching. Also, such a solution has many fortes for the practical quenching operation. The concentrated solution of Na2CO3 is the most excellent.抄録全体を表示PDF形式でダウンロード (637K) -
松倉 恒夫1952 年 16 巻 12 号 p. 655-659
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーThe electric resistance of high carbon high chromium steels by heat treatment was measured and the following results were obtained: (1) The resistivity curve of the annealed specimen that was measured in the course of slow heating and cooling (notationed Rα) was convex for the temperature axis and the one measured by air-cooling from 1130° (notationed Rγ) was concave. The experimental equations of these curves were parabolic. (2) The increase in resistivity after the quenching was considered to be caused mainly by the existence of supersaturated carbide and retained austenite in the quenching structure. (3) The resistivity curves measured by air-cooling from 1050°, 1000° and 950° consisted of the following three parts: (a) the parallel part with Rγ curve; (b) the part where the resistivity decreases; (c) the part where the inclination is close to the Rα curve’s. These changes was caused by Ar″ transformation which decreased the resistivity with the increase of spontaneous magnetization. (4) The specimen of steel B (containing about 0.3%W) which was air-cooled from 1050° showed the higher resistivity than the specimen air-cooled from 1130° at room temperature. But even in this case the type of the resistivity curve was similar to case 3. (5) It was observed that the effect of quenching to the aging temperature from 1130° and tempered to this temperature from 1130-air-cooled state were similar in principle. (6) The measuring values of resistivity in the cooling process after the hot bath quenching or tempering coincided with the values calculated in the consideration of the quantity of transformation, at high temperature. But when the temperature lowered the measuring values generally showed to be less than the calculated values. This may be considered have been caused by Ar″ transformation as in case 3.抄録全体を表示PDF形式でダウンロード (718K) -
鈴木 秀次, 池田 晋1952 年 16 巻 12 号 p. 659-662
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーBy means of the same method as in the case of the first report, the rate of growth of a recrystallized crystal was measured for six kinds of Al-Cu alloys, containing 0.027, 0.15, 0.56, 1.03, 1.61 and 2.00% Cu, respectively. The results differ from those of pure aluminium in the following points: (1) The more the copper content is the slower the growth-rate at a higher temperature than a certain characteristic temperature, but the reverse at the lower, provided that the copper content is more than about 0.03%. (2) An increase in copper content results in the depression of the transition temperature, at which the driving force changes its functional form from (l+c)⁄D or l⁄D in the case of the copper content being less than about 0.6% (3) The Rate of growth in alloys containing 1.61 or 2.00% Cu, pre-annealed at 350° is far slower than those pre-annealed at 450°, that is, the rate of growth is decreased by the process of dissolution of precipitates.抄録全体を表示PDF形式でダウンロード (538K) -
Namio Kawashima, Yuzo Nakamura1952 年 16 巻 12 号 p. 662-665
発行日: 1952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 (500K) -
本間 正雄, 鴫原 道夫1952 年 16 巻 12 号 p. 666-670
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーWhen oxygen was increased from the flake graphite iron, tensile strength was increased and toughness was decreased. On the other hand, if oxygen was decreased, irons became stronger and tougher.
The variety of cast iron was classified according to the oxygen amount in cast iron, and the reason why cast iron behaves differently in spite of the same chemical composition and cooling velocity was explained by the changes of cast iron properties caused by oxygen.
Because the activity of oxygen is decreased by carbon, the deoxidation of cast iron melt is more difficult than molten steel. The development of cast iron melting methods are discussed.抄録全体を表示PDF形式でダウンロード (993K) -
1952 年 16 巻 12 号 p. 670a
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーPlease see PDF Wrong:200{°ree}, 450{°ree} Right:400{°ree}, 250{°ree}抄録全体を表示PDF形式でダウンロード (29K) -
1952 年 16 巻 12 号 p. 670b
発行日: 1952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 (29K) -
1952 年 16 巻 12 号 p. 670c
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーPlease see PDF Wrong:14 (1952), 700° Right:14 (1925), 500°抄録全体を表示PDF形式でダウンロード (29K) -
1952 年 16 巻 12 号 p. 670d
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーPDF参照 （誤）著しい極大を示すのは，σ相が武田，永井両博士(2)のいわれる如く，体心立方格子相に変態することに相当するかもしれない． （正）著しい極大を示すのは，武田，永井両博士(2)のいわれる如く，規則格子FeCrの変態に基づくものかもしれない抄録全体を表示PDF形式でダウンロード (29K) -
佐藤 知雄, 金子 秀夫1952 年 16 巻 12 号 p. 671-674
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーThe present paper deals with the technical data on the sintering of copper-graphite base alloys for oilless bearing or electrical brush. Alloys measured in this experimeat are as follows: Cu-graphite, Cu-Cd-graphite, Cu-Zn-graphite, Cu-Al-graphite and Cu-Sn-Zn-Pb-graphite; and the details of the results obtained are given in twelve tables in the following pages.抄録全体を表示PDF形式でダウンロード (631K) -
五弓 勇雄1952 年 16 巻 12 号 p. 674-679
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーWire drawing with back tension (so-called reactive drawing) was carried out on pure iron wire, and it was clarified that this method had the following good characteristics in increasing back tension: (1) The compressive deformation decreases and the tensile deformation increases. (2) The die pressure decreases. (3) The friction loss between die and wire decreases and the efficiency of deformation increases. (4) The temperature rise of wire and die is small, so the self annealing of wire is lessened. (5) The obliteration of die is small. (6) High speed drawing is possible. (7) The power consumption of drawing decreases. (8) The lubrication of die becomes good. (9) The shearing deformation during drawing decreases and both the inside and the skin part of wire deforms uniformly, so the cupping defect hardly occurs. (10) The mechanical properties are uniform about the inside and the skin part of drawn wire. (11) At low reduction the strength of the drawn wire is ordinary, but the twisting property becomes better. (12) The residual stress is small, so the corrosion resistance becomes very good.抄録全体を表示PDF形式でダウンロード (847K) -
五弓 勇雄, 橘川 利行1952 年 16 巻 12 号 p. 679-682
発行日: 1952年
公開日: 2008/04/04
ジャーナル フリーWe carried out the wire drawing of patented 0.6% carbon steel wire with back tension, and obtained the following results (the general tendency of which is the same as the drawing of pure iron wire): (1) As the back tension increases the drawing force increases gradually, while the die pressure decreases raipdly. (2) The larger the reduction per pass is, the more remarkable above tendencies become. (3) The measured value of drawing force coincides with the value calculated by F. Körber’s formula. (4) At the die channel, the compressive stress decreases with the increase of the back tension, and at the same time the tensile stress increases, and the gradient of tensile stress becomes smaller. (5) With the increase of the back tension, the external friction decreases and the efficiency of deformation increases. (6) For the same reduction, the smaller the number of passes, the better the efficiency; this relation does not change in the case of back tension method. (7) The worse the lubrication (the larger the frictional coefficient), the greater the back tension effects. This phenomenon is explained by F. Körber’s formula.抄録全体を表示PDF形式でダウンロード (650K)
- |<
- <
- 1
- >
- >|