新制御圧延鋼に発生するセパレーションの評価方法について

概要

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The research on the evaluation of separation in TMCP steel plate is seldom found, although its fracture toughness and fatigue strength have been rather extensively studied. Hence, in this paper, the authours intend to clarify unsolved problems in the evaluation of separation and determine the basis of the measuring separation. Results obtained are summarized as follows; 1) The amount of separation occurred in TMCP steel plate is changed by impact energy. The maximum separation index should be obtained by the Charpy test with impact energy of 30kgf･m. 2) The separation consists of types a, b and c, but type c can be disregarded in the evalution of separation. 3) It needs to measure the length of separation over 1 mm. 4) In the COD test, momentary slight drop of load by the occurrence of separation can be disregarded, and the separation can be evaluated by the reduction of specimen width.
長崎大学工学部,Faculty of Engineering, Nagasaki Universityの論文