A cast steel part for nuclear power unit and its production process

Abstract

The invention discloses a zero-defect high-quality cast steel part for nuclear power. The cast steel part is characterized in that the cast steel part is chemically composed of, by weight, 0.18% to 0.20% of C, less than or equal to 0.60% of Si, 0.60% to 0.80% of Mn, less than or equal to 0.02% of P, less than or equal to 0.015% of S, 1.35% to 1.50% of Cr, less than or equal to 0.50% of Ni, 0.90% to 1.10% of Mo, 0.20% to 0.30% of V, less than or equal to 0.025% of Sn, 0.08% to 0.12% of Zr, the balance Fe and unavoidable trace impurities. The invention further discloses a technology used for producing the cast steel part, and according to the technology, the cast steel part has no defects, is high in quality, and is good in abrasion resistance and corrosion resistance, and high in toughness when in the high-temperature environment, and therefore, the cast steel part is suitable for a nuclear power unit.

Description

technical field [0001] The invention relates to a cast steel part and its production process, in particular to a nuclear zero-defect high-quality cast steel part and its production process. Background technique [0002] Cast steel parts for nuclear use are used in key positions of nuclear equipment. Because other processes cannot be manufactured or the production cost is too high technically, nuclear parts for nuclear use are produced by casting as needed. Nuclear equipment is high-end equipment. Due to the needs of operating environment, safety and durability, there are higher requirements for some performance and quality of cast steel parts. In addition to meeting the conventional mechanical performance requirements, since its operation often reaches a high temperature above 500°C, it is required to have good performance at high temperatures. [0003] The cast steel parts (such as cylinders, half-ring castings, etc.) are important parts of nuclear power units, and their q...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a nuclear cast steel part and its production process, and its purpose is to solve the problems of poor mechanical properties, low product quality and difficult production of cast steel parts

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