巻号一覧
後続誌
65 巻, 7 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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研究論文
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陳 順發, 呂 傳盛, 陳 立輝1993 年 65 巻 7 号 p. 535-540
発行日: 1993/07/25
公開日: 2011/06/22
ジャーナル フリーFerritic spheroidal graphite cast irons of four different silicon contents from 2.0 mass % to 4.1 mass % were deformed in tension at various strain rates and test temperatures. Based on the experimental results, the different type of flow instability at certain temperature can be recognized by the characteristics of the stress-strain curves. The jerky flow of S. G. cast irons were observed at the lower temperature which start at an early stage of yielding has resemblance to those appeared in mild steel. Based on the apparent activation energies estimated at the onset temperature of jerky flow, the activation energy for carbon diffusion increases with increasing silicon content. It implys that one of the dominant factor is the effect of interstitial carbons on the jerky flows. But the behavior of serrated flow, which appeared at a relatively higher temperature range can be recognized that is different from the above mentioned jerky flow instability. Due to the behaviors of serrated flow has resemblance to those appeared in high purity Fe-Si alloy and many substitutional binary FCC alloys, it implys that the substitutional silicon plays the major role in these test temperatures. The above suggestion is supported by the experimental evidences and rationalizations reported in this investigation.抄録全体を表示PDF形式でダウンロード (677K) -
南方 俊一, 田中 照司, 末光 毅, 伊藤 公雄1993 年 65 巻 7 号 p. 541-546
発行日: 1993/07/25
公開日: 2011/06/22
ジャーナル フリーThis paper deals with some practical problems associated with grain refined KM castings in applying to turbine disk materials. One is concerning its feasibility of utilizing it in unforged cast state for obtaining improved creep strength at intermediate temperatures. The work includes investigation of steel wire core applicability for making air cooling internal pathways and material properties (creep, tensile, fatigue). The other is concerning application of a new forging technique (SIRD) to the KM castings which is expected to have better forging performances than the conventional isothermal forging technique and consequently to provide improved tensile strength at intermediate temperatures.抄録全体を表示PDF形式でダウンロード (821K) -
星谷 光治, 久保田 耕平, 佐藤 勉, 二宮 隆二1993 年 65 巻 7 号 p. 547-552
発行日: 1993/07/25
公開日: 2011/06/22
ジャーナル フリーThe solidification shrinkages of Zn-Al-Cu alloys are measured by the original method which use the cylindrical metal mold, the Tatur's test and Ishikawa's test. Al and Cu contents are varied in the range from 4 to 10 %, and 0 to 13.5 % respectively. The results are as follows. (1) The total solidification shrinkages are 7.1∼7.6 %, and increase with Al contents. (2) The coefficient of body thermal shrinkage of melts are 1.00∼1.20 /K. (3) The shrinkages at solidifying are 3.0∼4.0 %. (4) The linear shrinkages for the mold are 1.15∼1.28 %, and increase with Al contents. On the other hand Cu contents decrease them.抄録全体を表示PDF形式でダウンロード (775K) -
遠藤 春男1993 年 65 巻 7 号 p. 553-558
発行日: 1993/07/25
公開日: 2011/06/22
ジャーナル フリーA nondestructive inspection technique measuring surface temperature under an unsteady-state conduction is proposed. This method is based on the surface temperature change on casting due to the surface crack on it. In the present study, the method was applied to a plate specimen with a slit-type surface crack. The heating of the specimen surface was carried out by using a boiling water. The surface temperature of the specimen was measured by thermocouple. The quantitative analysis of the crack depth was tried by taking ratio of the nondimensional temperature area which was obtained from the curve of the nondimensional temperature versus the heating time. The result shows that the crack depth can be estimated by using relationship between the nondimensional temperature area ratio and the known depth of crack.抄録全体を表示PDF形式でダウンロード (609K) -
辻川 正人, 冨永 正須, 川本 信1993 年 65 巻 7 号 p. 559-564
発行日: 1993/07/25
公開日: 2011/06/22
ジャーナル フリーThe role of alumina particles in anti-seizure properties of alumina particles composite aluminium alloys has been investigated. Composite specimens were prepared by vortex method under liquid state of matrix alloy at 1023 K. Friction tests were carried out with pin versus disc type tribometer. Aluminium alloy or composite specimens were pressed to annealed 0.6 % C steel, Hv 200, under unlubricated and in air condition. The seizure phenomena appeared as the drastic increase of wear volume and frictional force for specimens without alumina particles, even for hyper-eutectic Al-Si alloy. Composites never fell into seizure state. The composite with 5 vol % particles has the enough effect to preventing the seizure. The wear rates of composite pin specimens were increased with volume fraction of alumina particles, however. It was found from microscopic observation that the prevention of frictional seizure was for following reasons. They are the resistance of alumina particles against plastic flow of matrix, and the fragmentation and dispersion of particles at sliding surface to obstruct metal to metal contact.抄録全体を表示PDF形式でダウンロード (1220K)
技術報告
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名雪 東彦, 戸羽 篤也, 田中 勝, 竹内 稔1993 年 65 巻 7 号 p. 565-570
発行日: 1993/07/25
公開日: 2015/01/21
ジャーナル フリーPDF形式でダウンロード (3148K) -
糸長 一二, 黒沢 常吉, 軍司 義次1993 年 65 巻 7 号 p. 571-576
発行日: 1993/07/25
公開日: 2015/01/21
ジャーナル フリーPDF形式でダウンロード (2448K) -
桜井 大八郎, 菅 道太郎, 今村 博人, 南 三津男1993 年 65 巻 7 号 p. 577-581
発行日: 1993/07/25
公開日: 2015/01/21
ジャーナル フリーRecently, not only newly developed various materials but also complexed parts made of them increase the amount of impurities and harmful matters when recycling them, making the scrap recycling of these materials more and more important. When recycling these materials and parts, separation of operators and elimination of secondary waste occurrence must be studied and carried out. This study investigated the manufacturing process of CASK with bottom casted plate by remote-controlled vertical centrifugal casting method. It is proved experimentally, with the adequate control of centrifugal force and weight of the casting, the manufacture of the CASK will be achieved. Also the existence of temperature differences between widely-used solidification analysis program and experiment make the development of new solidification analysis necessary.抄録全体を表示PDF形式でダウンロード (2277K)
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