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发明公开
CN105177446A 600℃中温核电压力容器用钢及其制造方法 无效 - 驳回

600℃中温核电压力容器用钢及其制造方法
摘要：
本发明公开了一种600℃中温核电压力容器用钢，其特征在于：其化学成分重量百分比为：C：0.08～0.12，Si：0.15～0.20，Mn：1.10～1.50，P≤0.008，S≤0.003，Alt：≤0.050，Ni：0.45～0.65，Cr：2.50～2.75，Mo：1.00～1.20，N≤0.004，余量为Fe及杂质。本发明还提供一种600℃中温核电压力容器用钢的制造方法。本发明钢种耐中温性能优良，600℃环境钢材下屈服强度ReL不低于室温屈服强度的70％，即具有良好的高温强度，同时具有抗氧化性、抗腐蚀性，且化学成分相对简单，生产工艺过程易于操作，工艺参数易于控制，成本较低，效率高，适宜规模生产。能满足核电蒸汽发生器、蒸汽管道、高温气冷堆部分耐热管道用钢的需求。
摘要（英）：

The invention discloses steel for a 600-DEG C medium-temperature nuclear power pressure vessel. The steel is characterized by being composed of the following chemical ingredients in percentage by weight: 0.08-0.12% of C, 0.15-0.20% of Si, 1.10-1.50% of Mn, not greater than 0.008% of P, not greater than 0.003% of S, not greater than 0.050% of Alt, 0.45-0.65% of Ni, 2.50-2.75% of Cr, 1.00-1.20% of Mo, not greater than 0.004% of N, and the balance Fe and impurities. The invention further provides a manufacturing method for steel for a 600-DEG C medium-temperature nuclear power pressure vessel. The steel disclosed by the invention is excellent in medium-temperature resistance, has a yield strength ReL of not less than 70% of a room-temperature yield strength under 600-DEG C environment steel, that is, has a good high-temperature strength, and has oxidation resistance and corrosion resistance; and moreover, the chemical ingredients are relatively simple, the technical process of production is easy to operate, the technical parameters are easy to control, and the steel is low in cost, high in efficiency, and suitable for large-scale production. The steel is capable of meeting the needs of steel for a part of heat-resistant pipelines of nuclear power steam generators, steam pipelines and high-temperature gas-cooled reactors.

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