| 摘要 |
PURPOSE:To obtain the ferritic heat resisting steel having superior thermal fatigue characteristic, by providing specific amounts of (C+N), Si, Mn, Cr, Al, and 1 or >=2 kinds among Nb, Ti, and Zr. CONSTITUTION:The heat resisting steel consists of, by weight, 0.05-0.4% (C+N), 0.5-3.5% Si, <2% Mn, 18-25% Cr, 0.2-2% Al, 0.1-1.5%, in total, of 1 or >=2 kinds among Nb, Ti, and Zr, and the balance Fe, or further contains 1 or >=2 kinds selected from 0.3-3% Ni, 0.3-3% Mo, 0.5-3% W, 0.2-2% V, and 0.001-0.01% B.
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