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发明公开
CN103320721A 要求厚拉和高拉保屈服及强度下限的铬钼钢板及生产方法 无效 - 撤回

要求厚拉和高拉保屈服及强度下限的铬钼钢板及生产方法
摘要：
本发明涉及一种要求厚拉和高拉保屈服及强度下限的铬钼钢板及生产方法，属于钢铁冶炼工艺技术领域。技术方案是包含冶炼连铸工序、加热轧制工序、热处理工序，钢板由以下重量百分含量的组分组成：0.13%≤C≤0.17%，0.50%≤Si≤0.65%，0.42%≤Mn≤0.62%，P≤0.007%，S≤0.005%，1.40%≤Cr≤1.50%，0.50%≤Mo≤0.65%，Cu≤0.20%，0.10%≤Ni≤0.20%，Sb≤0.003%，Sn≤0.010%，As≤0.010%，余量为Fe和不可避免的杂质。本发明的钢板经模拟焊后热处理后的力学性能达到下列要求：445℃高拉Rp0.2≥233MPa，Rm≥415.6MPa，厚拉伸Rm≥515Mpa,Rp0.2≥310Mpa,断面收缩率≥40%。本发明的铬钼钢板满足了国内外石化和煤化行业高温恶劣环境用铬钼钢板厚向及高温性能的需求，可广泛用于石化煤化行业各类加氢反应器等设备上。
摘要（英）：

The invention relates to a chrome-molybdenum steel plate requiring to keep yield and strength lower limits under thickness stretching and high stretching and a production method thereof and belongs to the technical field of steel and iron smelting process. The production method comprises a smelting continuous casting working procedure, a heating rolling working procedure and a heat treatment working procedure. The steel plate comprises the following components in percentage by weight: C is greater than or equal to 0.13% and is less than or equal to 0.17%, Si is greater than or equal to 0.50% and is less than or equal to 0.65%, Mn is greater than or equal to 0.42% and is less than or equal to 0.62%, P is less than or equal to 0.007%, S is less than or equal 0.005%, Cr is greater than or equal to 1.40% and is less than or equal to 1.50%, Mo is greater than or equal to 0.50% and is less than or equal to 0.65%, Cu is less than or equal to 0.20%, Ni is greater than or equal to 0.10% and is less than or equal to 0.20%, Sb is less than or equal to 0.003%, Sn is less than or equal to 0.010%, As is less than or equal to 0.010% and the balance of Fe and inevitable impurities. The mechanical property of the steel plate subjected to simulation postweld heat treatment meets the following requirements: the high stretching Rp 0.2 at 445 DEG C is greater than or equal to 233Mpa, the Rm is greater than or equal to 415.6 Mpa, the thickness stretching Rm is greater than or equal to 515 Mpa, the Rp 0.2 is greater than or equal to 310 Mpa, and the percentage reduction of area is greater than or equal to 40%. The chrome-molybdenum steel plate meets the requirements of petrifaction and coal chemical industries at home and abroad on the thickness and high-temperature performance of the chrome-molybdenum steel plate in high-temperature severe environments and can be widely applied to various hydrogenation reactors and the like in petrifaction and coal chemical industries.

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