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针对核电结构用H型钢的特殊要求,采用Cu-Ni微合金化,合理设计化学成分,优化轧制工艺,避免了含铜钢“铜脆”现象的产生。核电结构用H型钢的屈服强度和冲击性能比S235J0都有提高,表明Cu、Ni的加入既提高了材料的强度,也提高了材料的冲击韧性。电化学试验表明,核电结构用H型钢的耐蚀性能有较大提高。开发钢种力学性能、表面质量及耐腐蚀性能完全满足核电结构用钢要求。
In view of the special requirements of H-beam for nuclear power structure, Cu-Ni microalloying is adopted to rationally design chemical composition and optimize rolling process, thus avoiding the occurrence of copper-containing copper “brittle” phenomenon. The yield strength and impact performance of H beam for nuclear power structure are higher than that of S235J0, which shows that the addition of Cu and Ni not only improves the strength of the material, but also improves the impact toughness of the material. Electrochemical tests show that the corrosion resistance of H-beam for nuclear power structure is greatly improved. Development of mechanical properties of steel, surface quality and corrosion resistance to fully meet the nuclear structural steel requirements.