鋳物

研究論文

合成樹脂模型製作法の研究

若林洋一, 小野哲郎

1963 年 35 巻 8 号 p. 461-470
発行日: 1963/08/25
公開日: 2012/10/22

DOIhttps://doi.org/10.11279/imono.35.8_461

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An investigation was done on various of epoxy and polyethylene resins to make plastic patterns for the foundry use.
It was found that the epoxy A-R₃₆ resin was most suitable for a pattern material, as it had lower shrinkage, high dimensional accuracy and excellent wear-resistance. The impact strength of the plastic pattern was improved by the control of curring technique and the cost was lower than that of metal or wooden patterns.

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深腐食法による鋳鉄中黒鉛の立体的観察

草川隆次, 中田栄一

1963 年 35 巻 8 号 p. 470-475
発行日: 1963/08/25
公開日: 2012/10/22

DOIhttps://doi.org/10.11279/imono.35.8_470

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The deep etching method was developed to determine the shape and distribution of graphite in cast iron in three dimensions.
This method involves three stages, that is (1) dissolve off the matrix in aqua regia, (2) cleaned by fluoric acid and (3) deposition of copper on the graphite surface to enable more distinct identification.

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鋳鉄の高温度における亜硫酸ガスによる腐食について

中井弘

1963 年 35 巻 8 号 p. 476-482
発行日: 1963/08/25
公開日: 2012/10/22

DOIhttps://doi.org/10.11279/imono.35.8_476

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  The corrosion of cast iron by SO₂ gas at high temperatures was examined. And the following results were obtained :
  (1) The corrosion product of cast iron was composed of pyrrhotite Fe₁-xS, wüstite FeO and magnetite Fe₃O₄. In the outer layer, C and P did not diffuse, on the contrary Mn diffused freely and Si did a little.
  (2) The corrosion rate was controlled by the parabolic rate law.
  (3) Between the corrosion rate and temperature, the exponential law was found.
  (4) C promoted the corrosion rate of cast iron, on the contrary Mn did not and Si affected it very little.

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鋳鉄の酸素分析法の検討

―分析用試料の調製法について―

前川静弥, 中川義隆, 松見悟

1963 年 35 巻 8 号 p. 482-488
発行日: 1963/08/25
公開日: 2012/10/22

DOIhttps://doi.org/10.11279/imono.35.8_482

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  Investigations were performed on the preparation of samples for the determination of oxygen in cast iron by vacuum fusion method.
  The results obtained were as follows :
  (1) Analysis values of oxygen in white iron and in nodular iron kept in atmosphere did not change if the surface scale on a specimen was removed.
  (2) Analysis values of oxygen in gray iron kept in atmosphere were high.
  (3) Analysis values of oxygen in white iron were not be influenced by the preparation method for analysis as in the case of steel.
  Oxygen content in other cast irons showed reasonable value when they were finished by files.

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