本发明公开了一种多析出增强型抗震耐蚀耐火H型钢及其制备方法,钢的化学成分的重量百分比为：C 0.04％-0.07％、Si 0.15％-0.30％、Mn 1.1％-1.6％、Cr 0.3％-0.6％、Ti 0.06％-0.12％、Mo 0.1％-0.2％、Ni 0.80％-1.20％、Cu 0.80％-1.20％、Al 0.01％-0.03％、P≤0.008％、S≤0.004％,余量为Fe和不可避免的杂质组成,采用常规真空冶炼并浇注成坯,对铸坯进行加热,经过再结晶区轧制成H型钢,空冷至室温,得到铁素体和贝氏体双相组织。依靠轧后空冷产生的相间析出和遇火产生的大量Cu析出,提高耐火性能。本发明设计的多析出增强型抗震耐蚀耐火H型钢,具有降低合金化成本、制备工艺简单、力学性能优异等特点,可广泛应用于同时满足抗震、耐蚀及耐火要求的建筑H型钢。

This invention is the production process of the multi-precipitation enhanced H-beam steel with great anti-seismic, corrosion-resistance, fire-resistance. This material’s chemical composition is: C: 0.04%~0.07%, Si: 0.15%~0.30%, Mn: 1.1%~1.6%, Cr: 0.3%~0.6%, Ti: 0.06%~0.12%, Mo: 0.1%~0.2%, Ni: 0.80%~1.20%, Cu: 0.80%~120%, Al: 0.01%~0.03%, P: ≤ 0.008%, S: ≤ 0.004%, the remainder is iron and inevitable traces chemical element. The process is listed below: 1, using conventional vacuum smelting and casting into billets; 2, heating the cast billets; 3, rolled into H-beam steel through the recrystallization zone, 4, free cooling to room temperature, bainite and ferrite dual-phase microstructure are obtained. Relying on the interphase precipitation produced by air cooling after rolling and a large amount of Cu precipitation produced by fire to improve the fire resistance. Because of lower spending, easier process, better mechanical properties, this steel is widely used in high-rise building, super-high-rise building and satisfy high strength, anti-seismic, corrosion resistance, fire resistance at the same time.