Anti-collision pressure vessel steel for storing and transporting ethane and production method thereof

Abstract

The application discloses an anti-collision pressure container steel for storing and transporting ethane, which is characterized by the following components and wt%: C: 0.10-0.20%, Si: 0.20-0.40%, Mn: 1.58-1.80%, Al: 0.025-0.045%, P: ≤0.015%, S: ≤0.005%, V: 0.030-0.065%, and Nb: 0.025-0.045%. The application comprises the following steps: after smelting and casting into a blank, the cast blank is heated; rough rolling; finish rolling; cooling; normalizing; and stress relief. The static yield strength Rel of the steel is 420-480 MPa, the dynamic yield strength Re is 510-747 MPa, the tensile strength is 585-645 MPa, the yield strength ratio is ≤0.85, the static elongation after fracture A is 28-42%, the dynamic elongation after fracture A d The steel plate has the following properties: the static yield strength Rel is 420-480 MPa, the dynamic yield strength Re is 510-747 MPa, and the tensile strength is 585-645 MPa; the yield strength ratio is ≤0.85, the static elongation after fracture A is 27-40%, the dynamic elongation after fracture A is 27-40%, the product of strength and plasticity is 16800-26042 MPa%, the drop weight tear test (DWTT) energy is 15-19 kJ, the absorbed energy of the steel plate is 3.5-3.75 KJ when the collision speed is 5-50 m / s and the collision displacement is 1.5 m, and the ferrite grain size is ≤0.012 μm.

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