非調質鋼の高応力疲労強度

概要

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The influence of alloy elements on tensile properties and large stress amplitude fatigue strength of various matrix structure steels was investigated by tensile test. tension-compression fatigue test and micro structure observation. The fatigue strength is strongly related to the 0.01% proof stress. Each microstructure has different relationship between the fatigue strength and 0.01% proof stress. When the 0.01% proof stress is constant. the bainite structure shows the highest fatigue strength followed by the ferrite - pearlite. and the tempered martensite is the lowest. The 0.01% proof stress of ferrite - pearlite structure steel is improved by increase in vanadium content. Therefore. the fatigue strength of ferrite - pearlite structure steels is increased by vanadium addition more effectively than by other elements.
電気製鋼研究会の論文