大规格钽板材轧制工艺研究

The Research of Large Size Tantalum Sheets'Rolling Technology

研究了大规格钽板材(长度L≥1000 mm,宽度B≥600 mm,厚度δ=2-15mm)的轧制工艺,对常规轧制工艺中造成钽板材端头“舌型”及“边角缺料”的原因进行了分析。实验工艺中,通过多次换向轧制、控制道次加工率、沿板材对角线方向提前进行“边角缺料”轧制预补偿等措施,抑制了“舌型”突出,最终获得板材端头“舌型”内凹、“边角缺料”补料突出的大规格钽板材(2000 mm×700 mm×4 mm),提高了成材率7%以上,改善了产品质量,降低了生产成本,增强了产品的市场竞争力。

The rolling technology of large size tantalum sheets with width≥600 mm, length≥1 000 mm, and thickness=2~15 mm is studied, and the causes for the "tongue shape" or "defect in corner" at tantalum sheet end during the rolling process are analyzed. In the experiment, by multiply changing the rolling direction, controlling the thickness reduction rate, and adopting the rolling precompensation for "defect in corner" along the diagonal direction of the tantalum sheet, the large size tantalum sheet(1 000 mm×600 mm×4 mm) with indent "tongue shape" and compensated "defect in corner" is prepared. This method increases the material yield by 7% or more, improves the product quality, and reduces the cost, which will enhance the market competitiveness of products.