Stainless steel seamless tube for sodium-cooled fast reactor and preparation method of stainless steel seamless tube

Abstract

The invention discloses a stainless steel seamless tube for a sodium-cooled fast reactor. Microalloying component fine adjustment is carried out based on a 316H stainless steel base material, the stainless steel seamless tube comprises the following components in percentage by mass: 0.04-0.05% of C, less than or equal to 0.6% of Si, 1.00-2.00% of Mn, less than or equal to 0.030% of P, less than or equal to 0.003% of S, 17.0-18.0% of Cr, 11.5-12.5% of Ni, 2.50-2.70% of Mo, less than or equal to 0.10% of Cu, 0.05-0.07% of N, less than or equal to 0.0015% of B, less than or equal to 30 ppm of O, less than or equal to 5.0 ppm of H and the balance of Fe and impurities, and the ferrite content is controlled to be less than or equal to 1%. The stainless steel seamless tube for the sodium-cooled fast reactor is manufactured through a high-purity smelting process, microalloying component fine adjustment, a stainless steel casting process, a hot perforation treatment process and finished product cold machining. By means of the mode, the stainless steel seamless pipe for the sodium-cooled fast reactor and a preparation method can meet the use standard of nuclear safety high-temperature nano pipelines, and the stainless steel seamless pipe has obdurability, corrosion resistance and durability.

Description

technical field [0001] The invention relates to the field of stainless steel seamless pipes, in particular to a stainless steel seamless pipe for sodium-cooled fast reactors and a preparation method. Background technique [0002] With the pressure of economic development and environmental deterioration in various countries in the world, the construction of nuclear power, utilization and development of nuclear energy have become one of the key points of future energy development. my country has made significant progress in the development and construction of nuclear power. The third-generation nuclear power technology has reached the world's advanced level, and the fourth-generation nuclear power technology has reached the international leading level. The sodium-cooled fast neutron reactor in the fourth-generation nuclear power plant, due to its high safety and reliability, and strong multiplication capacity, can increase the utilization rate of uranium resources to more than...

AI Technical Summary

Problems solved by technology

The material needs to have high temperature resistance, and 316H stainless steel seamless pipe has ferrite forming elements such as Mo, Cr, Si in the composition, and there is inevitably a certain ferrite content. When 316H stainless steel seamless pipe 475°C embrittlement will occur in ferrite, which will increase the tendency of brittle fracture of the material

Images