ON THE STUDY OF TIME PIECE SPRING (I)

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概要

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• Now-a-days, on account of shortage of Swedish Steel which had been imported prior to the War, time piece springs are produced from high carbon steel in this country.There were many impurities in this steel (e. g. Cu, Cr, P, S, etc.) and caused breakings very often in rolling and employment. The. study of time piece spring became necessary.There are a few references relating to the effect of austempering on the properties of steel. However little seems to have been done on the effect of austempering or martempering on time piece springs.The authors, taking samples of two kinds of thin high carbon steel plates and rod bars, examined the mechanical properties due to austempering and martempering. Below 300°C the mechanical properties due to austempering were superior to martempering in thin high carbon steel plates.

• 日本ばね学会の論文

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