Producing thin strips by twin-roll casting—part I: Process aspects and quality issues
Producing thin strips by twin-roll casting—part I: Process aspects and quality issues
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作者：
Ben Q. Li
本文由两部分组成，讨论了铝和钢铁工业中双辊铸造直接生产可卷曲薄带材的研究和发展的最新进展。而前者是授权的脚轮接近理论生产力极限，后者是努力把试点脚轮投入商业运作。这些密集的研发工作源于该工艺在经济和冶金方面的优势。由于双辊铸造将凝固和热轧合并为一个工序，因此该工艺所需的资金投入低，运行成本低。此外，由于在此过程中获得的高凝固速率，所生产的薄带材具有精细的金相组织，其特征是柱状和等轴带具有细小的金属间颗粒。双辊铸造的热情正在全球范围内传播。本文着重介绍了双辊连铸的工艺要点和质量控制。第二部分将出现在8月号上，将审查流程建模和试点工厂开发活动。
This two-part paper discusses recent advances in research and development for the direct production of coilable thin strips by twin-roll casting in both the aluminum and steel industries. While the former is empowering the casters to approach the theoretical productivity limit, the latter is striving to put pilot casters into commercial operation. These intensive R&D efforts are derived from the advantages, both economic and metallurgical, offered by the process. As twin-roll casting combines solidification and hot rolling into a single operation, the process requires low capital investment and low operational cost. Also, because of the high solidification rate attained in the process, the thin strips produced have a refined metallurgical structure, characterized by columnar and equiaxed zones with fine intermetallic particles. The enthusiasm about twin-roll casting is now being spread worldwide. This paper focuses on the process aspects and quality control of twin-roll casting. Part II, which will appear in the August issue, will review process modeling and pilot-plant development activities.