330 Cr-Mo 鋼の疲労特性と設計疲労曲線

概要

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This paper shows results of fatigue properties and design fatigue curves for Cr-Mo steels. Reactors of gas facilities of oil refinery and chemical plants are constructed with the Cr-Mo steels due to better properties in the conditions of elevated temperature and hydrogen. To take advantage of plant design at low cost, the design fatigue curves are required. However, fatigue data are not so many, in particular, at high temperature. Results of fatigue properties and design fatigue curves of the Cr-Mo Steels (SCMV4-2 steel, modified 2.25Cr-1Mo steel and modified 3Cr-1Mo steel) by testing at room temperature and high temperatures (400℃-500℃) are shown. The fatigue strength is decreased with increasing of test temperature. In high cycle region at high temperature, the fish-eye type interior fracture is found, and the S-N curve shows no fatigue limit. The design fatigue curves are constructed in accordance with ASME (Section VIII Division 2).
一般社団法人日本機械学会の論文
2003-09-23