焼入時の熱伝達(第2報)

概要

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At quenching period the test bodies were rapidly cooled through the three processes, film state boiling, bubble state boiling, natural convection. The authors intend to report in the present paper as to how heat transfer coefficient a during the cooling rapid is changed by various shapes of test piece (solid cylinder, sphere, cub). Arranging the data of the experiments, the authors reached to the following conclusion : (1) Red heated bodies are cooled to the boiling temperature of coolant during the process of film state boiling, notwithstanding the variation of shapes of the bodies. (2) Cooling ability is greatly promoted by reducing the thickness of vapor film on the surface and shortening of its clinging times. (3) a, during quenching period, has different values with the variation of shapes of the test bodies and the order of α values is sphere <cylinder <face of cub <edge of cub <corner of cub.
社団法人日本機械学会の論文
1952-08-15