鑄鐵の熱傳導率に就いて(第 2 報)

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概要

• 論文の詳細を見る

• In the first report, the authour described on the thermal conductivity of white and gray cast irons making chilled Rolls. It was an important thing to calculate the thermal stress induced in the roll and to consider the other heat relations on the roll, the ingot making practice and the internal combustion engine. From the result of the former experiment, it was seen that the thermal conductivity of cast iron was much influenced by the microscopic structure than by the chemical composition. In this paper, he reports on the results of the thermal conductivity measuring on gray cast irons of various chemical composition with the same apparatus as that was described in the first report The temperature range experienced extends over the ordinary temperature to about 800℃ and the chemical composition of specimens is varied as follows : 1. Carbon Series ; four specimens whose carbon contents are varied from 2.5% to 3.69%. 2. Silicon Series ; five specimens whose silicon contents are varied from 1.42% to 3.84% 3. Phosphorus Series ; Six specimens whose phosphorus contents are varied from 0.108% to 1.156%. The thermal conductivity of cast iron is much affected by the microscopic-structure as shown in the first report, hence he measured it first on the specimens as cast in which remainned some pearlites, and then on the annealed one whose structure is consisted of the graphite flake and the ferritic matrix, that is convinient to see the effect of the chemical composition on the thermal conductivity. It will be seen from the result of the experiment that the thermal conductivity of the well annealed gray cast iron is gradually decreased as the contents of carbon, silicon and phosphorus are increased, although the rate of the influence is not the same on each element ; and also that the influence of the microscopic-structure on the thermal conductivity is much larger than that of the chemical compositions.

• 社団法人日本鉄鋼協会の論文
• 1933-06-25

著者

• 菊田 多利男

  日立製作所中央研究所

• 菊田 多利男

  戸畑鑄物會社

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