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Heat-resistant cast steel excellent in aged ductility and creep rupture strength for hydrogen producing reaction tubes
Heat-resistant cast steel excellent in aged ductility and creep rupture strength for hydrogen producing reaction tubes
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机译：耐热铸钢，具有出色的时效延展性和蠕变断裂强度，可用于制氢反应管
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摘要
A heat-resistant cast steel excellent in high-temperature strength, aged ductility and creep rupture strength for use as a material for steam reforming reaction tubes in fuel cell hydrogen generation systems and the like. The cast steel has a chemical composition comprising, in mass %, 0.1 to 0.5% of C, up to 2.5% of Si, up to 2.5% of Mn, 15 to 26% of Cr, 8 to 23% of Ni, 0.1 to 1.2% of Nb, 0.01 to 1.0% of Ti, 0.001 to 0.15% of Ce, up to 0.06% of N and the balance substantially Fe, the cast steel being 20 to 45 in the parameter value P calculated from the expression:P=89.3−78.4C+0.1Si−5.7Mn−1.7Cr +0.01Ni+2Nb+5.3Ti−36.5N−50.8Ce. When desired, the steel contains at least one of 0.001 to 0.05% of B, 0.01 to 0.5% of Zr and 0.001 to 0.15% of La, and/or 0.01 to 0.3% of Al. Further when desired, the C, Cr and Ni contents are limited to 0.1 to 0.3% of C, 15 to 20% of Cr and 8 to 18% of Ni.
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机译：具有优异的高温强度，时效延展性和蠕变断裂强度的耐热铸钢，用作燃料电池制氢系统等中的蒸汽重整反应管的材料。铸钢的化学组成按质量％计包括0.1至0.5％的C，至多2.5％的Si，至多2.5％的Mn，15至26％的Cr，8至23％的Ni，0.1至0.1％。 Nb的1.2％，Ti的0.01至1.0％，Ce的0.001至0.15％，N的最高0.06％，其余为基本上Fe的铸钢，其参数值P由表达式计算为20至45：<？in-line-formulae description =“在线表达式” end =“ lead”？> P = 89.3−78.4C + 0.1Si-5.7Mn-1.7Cr + 0.01Ni + 2Nb + 5.3Ti-36.5 N-50.8Ce。 <？in-line-formulae description =“ In-line Formulae” end =“ tail”？>当需要时，钢包含0.001至0.05％的B，0.01至0.5％的Zr和0.001至0.15％的La和/或0.01至0.3％的Al中的至少一种。此外，当需要时，将C，Cr和Ni的含量限制为C的0.1至0.3％，Cr的15至20％和Ni的8至18％。
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