巻号一覧
前身誌
68 巻, 7 号
選択された号の論文の9件中1～9を表示しています
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研究論文
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柴田 良一, 金内 良夫1996 年 68 巻 7 号 p. 561-566
発行日: 1996/07/25
公開日: 2011/02/01
ジャーナル フリーThe fracture criteria for spheroidal graphite cast iron and other structual materials was examined, using the torsion-tension test equipment. The fracture criteria for spheroidal graphite cast iron lies between the Mises theory and maximum principal stress theory. The fracture criteria for medium carbon steel agrees with the Mises theory. For aluminum wrought alloy, the fracture criteria for the 7075 alloy agrees with the Mises theoy, but that for the 2024 alloy and 6061 alloy shifts slightly towards the maximum principal stress theory.抄録全体を表示PDF形式でダウンロード (1102K) -
楊 錦成, 闕 山埠1996 年 68 巻 7 号 p. 567-571
発行日: 1996/07/25
公開日: 2011/02/01
ジャーナル フリーThe foamability of recycled alloys such as ADC6 (Al-0.27Si-3.11Mg), AC2A (Al-5.51Si-3.94Cu) and ADC12 (Al-11.2Si-1.8Cu) were investigated by a gas foaming process. The high Mg-content alloy (ADC6) took a considerably short time for viscosity to rise due to accelerated oxdiation of the melt. In addition, the AC2A alloy with a larger mushy zone (i. e. , larger liquidus-solidus difference) required a long time to promote the growth of the foam in the liquid-solid region. The high Fe-content alloy such as ADC12 alloy, easily forms solidification cracks due to the formation of Al-Fe-Si intermetallic compound. This problem was solved by controlling the solidification rate of the foaming process.抄録全体を表示PDF形式でダウンロード (965K) -
大西 脩嗣, 鷹合 徹也, 飯塚 康夫, 影山 望1996 年 68 巻 7 号 p. 572-578
発行日: 1996/07/25
公開日: 2011/02/01
ジャーナル フリーAn improved diecasting method based on the following conditions was developed. (1) Molten metal processed by GBF (Gas Bubbling Filtration) method. (2) Use of inert gas to prevent oxidation of molten metal (buffer furnace, holding furnace, and launder). (3) Supply of molten metal through sleeves using electromagnetic pump. (4) Use of powder mold separator (Iubricants). The results showed stability in sleeve temperature and reduction in the formation of oxides and other undesirable inclusions. Variation in test strengths decreased greatly, and deviation of test strengths was reduced by about 50% for compression and 20% for tensile tests.抄録全体を表示PDF形式でダウンロード (1124K) -
桜木 卓也1996 年 68 巻 7 号 p. 579-584
発行日: 1996/07/25
公開日: 2011/02/01
ジャーナル フリーAn algorithm for solving unsteady incompressible viscous flows with free surface using a generalized coordinate system is proposed. In order to decide the free boundary configurations of the fluid, the extended VOF method is applied, and the enthalpy method extended to the generalized coordinate system is applied to consider the latent heat. The thermal resistance between two different materials is considered at the computational cell face. This algorithm is applied to the simulation of the molten metal flow with solidification in a belt and wheel type continuous casting. This calculation allows us to see the flow field with solidification in the mold cavity and the cooling effects of the mold.抄録全体を表示PDF形式でダウンロード (1428K) -
池永 明, 新田 康寛, 川本 信1996 年 68 巻 7 号 p. 585-591
発行日: 1996/07/25
公開日: 2011/02/01
ジャーナル フリーCast irons are thought to be superior in corrosion resistance to plain steels. The differences between cast iron and plain steel are mainly in the existence of graphite and the amount of silicon. The graphite nobility for the matrix results in the electric potential difference between graphite and matrix. Thus the study of the effect of graphite morphology on corrosion resistance in cast irons under mild corrosive environments is needed. In this study, ductile cast irons with different graphite nodule size are austempered, their corrosion potentials are measured and their anodic polarization tests are carried out in 0.01N HCl aq. . The results show that : (1) In ductile cast irons, the smaller is the graphite nodule size, the lower is the corrosion resistance. In ADI, however, the graphite nodule size has a littIe effect on the corrosion resistance. (2) In ADI, the amount of retained austenite and the corrosion resistance decrease as the austempering time increases.抄録全体を表示PDF形式でダウンロード (1039K) -
永吉 英昭, 今西 幸平1996 年 68 巻 7 号 p. 592-596
発行日: 1996/07/25
公開日: 2011/02/01
ジャーナル フリーThe control of chilling tendency of spheroidal graphite cast iron becomes a key technology for the production of thin ductile iron castings. In this study, the difference of inoculating effect by Fe-Si exerting on the chill formation was investigated on the melts spheroidized with pure Mg and Fe-Si-Mg alloy. These results indicated that the inoculating effect faded earlier and the chill tendency was severer in pure Mg treated melt.抄録全体を表示PDF形式でダウンロード (991K) -
新山 英輔, 安斎 浩一1996 年 68 巻 7 号 p. 597-601
発行日: 1996/07/25
公開日: 2011/02/01
ジャーナル フリーThe heat absorption by a semi-infinitely thick mold was analytically solved assuming heat resistance at the interface between the mold and the casting. The casting surface temperature was assumed to be constant. By comparing the rigorous solution thus obtained with the first approximations for short and long time, the ranges of interface resistance controlling and mold resistance controlling were determined. The importance of a dimensionless parameter corresponding to time was established and a simple approximate solution was shown to be substantially satisfactory for the whole range of time. Some practical examples were analyzed in the light of the results.抄録全体を表示PDF形式でダウンロード (824K)
技術報告
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戸田 文雄, 松原 眞, 安川 昇吾1996 年 68 巻 7 号 p. 607-611
発行日: 1996/07/25
公開日: 2014/12/18
ジャーナル フリーPDF形式でダウンロード (2281K)
レビュー
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生型研究部会1996 年 68 巻 7 号 p. 612-617
発行日: 1996/07/25
公開日: 2014/12/18
ジャーナル フリーPDF形式でダウンロード (4102K)
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