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我国钢铁轧制技术进步及展望

Advances and prospects in steel rolling technology in China

  • 摘要: 近年来,我国轧制技术正处于从跟跑、并跑到领跑的快速发展阶段。在工艺与装备方面,我国在多模式无头铸轧制技术、宽厚板5 600 mm轧机技术、2 680 mm宽幅不锈钢热连轧技术、六机架六辊连轧机组生产高牌号硅钢技术、板带钢高精热处理工艺与装备技术、宽幅不锈钢超薄料关键生产工艺技术、热轧无缝钢管在线组织性能调控技术等一批工艺与装备技术创新与应用实践跨入国际领先水平。在钢铁产品方面,我国先进钢铁企业在汽车用钢、能源用钢、工程机械用钢、船舶及海洋工程用钢、低成本2 000 MPa级超高强塑性钢和部分特殊钢的实物质量基本跨入国际领先行列。在超高强钢“强度-塑性-韧性”调控机理方面创新性提出了“位错工程+TRIP效应”协同机制、“马氏体拓扑学结构设计+亚稳相调控”协同增塑新机制。同时,在轧制过程数字化、智能化赋能轧钢工艺高质稳定化生产方面也达到国际先进水平。综合来看,我国在轧制工艺、装备、产品以及数字化、智能化赋能等方面进展巨大,成效显著,但与国际先进水平相比,在轧制核心工艺与装备核心、大型轧机控制系统以及高端高质化产品技术创新等方面仍存在一定差距,部分核心设备、控制系统仍需进口。结合我国钢铁行业发展趋势,提出在轧制核心工艺及装备成套技术,高端高质化产品技术创新,与前/后工序、产业链结合的连续化高效化关键技术,数字化智能化赋能等需要关注的技术创新与发展方向。

     

    Abstract: In recent years, China's rolling technology has rapidly advanced from being a follower to a parallel and then a leader. In terms of processes and equipment, China has achieved international leading levels in a series of innovations and applications, including multimode headless continuous casting and rolling technology, 5 600 mm wide-heavy plate rolling technology, 2 680 mm wide stainless steel hot continuous rolling production lines, six-stands six-high tandem unit for high-grade silicon steel, high-precision heat treatment processes and equipment for strip and plate, key production technologies for ultra-thin stainless steel sheets, and online microstructure and property control technology for hot-rolled seamless pipes. In steel products, China's advanced steel enterprises have essentially reached international leading standards in the quality of automotive steel, energy steel, engineering machinery steel, shipbuilding and offshore engineering steel, low-cost 2 000 MPa-level ultra-high-strength and ductile steel, and certain specialty steels. In terms of the "strength-plasticity-toughness" control mechanism for ultra-high-strength steel, innovative approaches such as the "dislocation engineering + TRIP effect" synergy mechanism and the "martensite topology design + metastable phase regulation" synergy plasticity enhancement mechanism have been proposed. Meanwhile, China has also reached international advanced levels in digital and intelligent empowerment for high-quality and stable rolling production.Overall, China has made significant progress in rolling processes, equipment, products, digitalization, and intelligent empowerment, but there remains a gap compared to international advanced standards in core rolling processes and equipment, large rolling mill control systems, and high-end, high-quality product technological innovation. Some core equipment and control systems still require imports.Considering the development trends of China's steel industry, key technological innovations and development directions to focus on include: core rolling process and equipment technology, high-end and high-quality product innovation, continuous and efficient key technologies integrated with upstream/downstream processes and the industrial chain, as well as digital and intelligent empowerment.

     

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