08Ni3DR steel plate capable of resisting hydrogen-induced cracks and manufacturing method of 08Ni3DR steel plate

Abstract

The invention relates to a 08Ni3DR steel plate capable of resisting hydrogen-induced cracks and a manufacturing method thereof. The steel plate comprises the following chemical components in percentage by mass, including 0.03-0.08% of C, 0.15% to 0.30% of Si, 0.30% to 0.50% of Mn, less than or equal to 0.005% of P, less than or equal to 0.001% of S, 0.020% to 0.030% of Al, 3.30%-3.60% of Ni, 0.15%-0.35% of Mo, Cr and Cu, less than or equal to 1ppm of H, less than or equal to 0.10% of As, Sb, Bi, Sn and Pb, and the balance of Fe and inevitable impurities. The delivery state of the steel plate takes a bainite structure as a matrix structure, in the delivery state of the steel plate, a sample, subjected to simulated postweld heat treatment, of the steel plate in the delivery state is subjected to a hydrogen induced crack resistance test: according to NACETM-0284-2003 and a solution A, the test method meets the conditions that CLR is smaller than or equal to 5%, CTR is smaller than or equal to 1.5%, and CSR is smaller than or equal to 0.5%; the performance of the steel plate sample subjected to the simulated postweld heat treatment meets the requirements of GB/T 3531 on 08Ni3DR; and the -100 low-temperature impact absorption energy at the 1/2T position of the center of the sample, subjected to the simulated postweld heat treatment, of the steel plate in the delivery state is greater than or equal to 260J.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular to an 08Ni3DR steel plate. Background technique [0002] Ni-based steel plate is one of the most important steel plates for low-temperature pressure vessels. It is widely used in the petrochemical industry. The typical steel type is 08Ni3DR steel plate (commonly known as 3.5Ni steel plate). The performance of 08Ni3DR steel plate depends on its chemical composition and manufacturing process system. , the most important performance index is -100 ℃ low temperature toughness. With the continuous development of science and technology, people put forward higher requirements for steel plates on the basis of strength and toughness, that is, while maintaining high strength and toughness, reduce the manufacturing cost of steel plates, and at the same time greatly improve the comprehensive performance and use of steel plates. Performance, the focus of which includes HIC performance. [0003] Some r...

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Problems solved by technology

[0004] The above researchers have done a lot of research on steel plates for HIC-resistant environments at low temperatures, but it should also be noted that HIC-resistant steel plates with a tensile strength of 490-610 MPa for lower temperature environments, such as -100°C environments The research on steel plates has not been reported in the literature

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