バネ材料に關する研究 (V)

概要

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Many materials were studied hitherto by the authors as the spring materials for high temperatures, and these results were reported in Tetsu-to-Hagane as the 1st to the 4th reports. In the 4th report, it was recognized that from the experimental results of microscopic structure, hardness, tensile strength and elongation, the material corresponding to a die steel No. 5 was found superior when treated at a constant temperature to which it had been treated with ordinary quench-temper method. This time, the results of the test on tensile strength, elongation and microscopic structure at high temperatures upto 500℃ were summarized as follows. (1) In comparison with the ordinary quench-tempered material, the material which had been quenched at 1100℃ and treated at constant temperatures of 350℃ and 600℃ was superior. (2) From the result of studying the effect of holding time, remarkable differences were not recognized with the materials which had been treated at the constant temperature upto 500℃ affecting the holding time. (3) From result of the effect of the holding time at 500℃ for 240 min., the properties of the material were recognized to be changed but a little. (4) The die steel No. 5, when treated at a constant temperature was considered superior as spring material for high-temperature uses upto 500℃.
社団法人日本鉄鋼協会の論文
1954-06-25