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FIRE-RESISTANT STEEL EXCELLENT IN HIGH-TEMPERATURE STRENGTH, TOUGHNESS AND REHEAT EMBRITTLEMENT RESISTANCE AND PRODUCTION PROCESS FOR THE SAME
FIRE-RESISTANT STEEL EXCELLENT IN HIGH-TEMPERATURE STRENGTH, TOUGHNESS AND REHEAT EMBRITTLEMENT RESISTANCE AND PRODUCTION PROCESS FOR THE SAME
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机译:相同的高温强度,韧性和抗回火耐火性及生产过程中的耐火钢优秀产品
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摘要
PROBLEM TO BE SOLVED: To provide a fire-resistant steel excellent in high-temperature strength, toughness and reheat embrittlement resistance, and to provide a production process for the same.;SOLUTION: A fire-resistant steel contains 0.001 to 0.030% C, 0.05 to 0.50% Si, 0.4 to 2.0% Mn, 0.03 to 0.50% Nb, 0.005 to less than 0.040% Ti, 0.0001 to less than 0.0050% N and 0.005 to 0.030% Al, further one or more elements selected from 0.005% or less Mg and 0.010% or less REM, and P and S limited to 0.03% or less and 0.02% or less respectively, while controlling the contents of C, Nb, Ti and N so as to satisfy the relationships C-Nb/7.74≤0.005 and 2≤Ti/N≤12. The production process includes heating a steel slab to 1,100 to 1,350°C and hot-rolling the steel slab with a cumulative rolling reduction of 30% or more at 1,000°C or lower.;COPYRIGHT: (C)2008,JPO&INPIT
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机译:要解决的问题:提供一种具有优异的高温强度,韧性和抗再热脆性的耐火钢,并提供一种其生产工艺。解决方案:耐火钢中的C含量为0.001至0.030%, Si 0.05至0.50%,Mn 0.4至2.0%,Nb 0.03至0.50%,Ti 0.005至小于0.040%,N 0.0001至小于0.0050%和Al 0.005至0.030%,另外一种或多种元素选自0.005%或控制C,Nb,Ti和N的含量以满足C-Nb / 7.74&le的关系,同时使Mg小于等于0.010%REM,P和S分别小于等于0.03%和0.02%。 ; 0.005和2≤ Ti / N≤ 12。生产过程包括将钢坯加热到1,100至1,350°C并热轧该钢坯,在1,000°C或更低的温度下累积轧制率降低30%或更多。
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