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首页> 外文期刊>JSME International Journal. Series A, Solid mechanics and material engineering >Influence of Chemical Composition and Heat Treatment Condition on Impact Toughness of 15Cr Ferritic Creep Resisitant Steel
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Influence of Chemical Composition and Heat Treatment Condition on Impact Toughness of 15Cr Ferritic Creep Resisitant Steel

机译：化学成分和热处理条件对15Cr铁素体系耐蠕变钢冲击韧性的影响

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摘要

Influences of chemical compositions, heat treatment and microstructure on impact toughness of 15Cr ferritic steel have been investigated. Charpy impact values of the furnace cooled steels were lower than 15 J/cm{sup}2 at room temperature independent of chemical compositions. Drastic improvement in impact toughness has been attained by controlling the carbon and nitrogen contents, by the addition of nickel and by the increase in cooling rate after annealing. However, the effect of nickel on impact toughness strongly depends on carbon and nitrogen contents. Improvement in impact toughness of the 15Cr ferritic steel has not been explained by individual microstructural factors of grain size, distribution of precipitates, volume fraction of martensitic phase. It has been supposed that the increase in Charpy impact toughness of the 15Cr ferritic steel was attained by improvement in toughness of ferrite matrix itself.
机译：研究了化学成分，热处理和显微组织对15Cr铁素体钢冲击韧性的影响。独立于化学组成，在室温下，炉冷的钢的夏比冲击值低于15 J / cm {sup} 2。通过控制碳和氮含量，通过添加镍以及通过提高退火后的冷却速率，可以实现冲击韧性的大幅提高。但是，镍对冲击韧性的影响在很大程度上取决于碳和氮的含量。 15Cr铁素体钢冲击韧性的提高尚未通过晶粒尺寸，析出物分布，马氏体相体积分数的单个微观结构因素来解释。可以认为，通过提高铁素体基体自身的韧性，可以使15Cr铁素体的夏比冲击韧性提高。

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