| 摘要 |
PURPOSE:To obtain a pure nickel hot coil having quality and little edge crack and little surface defect by coating oxidizing prevention agent on surface of continuously cast slab for the pure nickel material having the specific component at the specific film thickness and continuously not-rolling this slab after heating and holding at the specific temp. CONSTITUTION:The continuously cast slab for the pure nickel material composing of >=99.0% Ni, <=0.4% Fe, <=0.15% C, <=0.35% Si, <=0.35% Mn, <=0.25% Cu, <=0.008% P, <=0.005% S and the balance inevitable impurities, is produced. After removing the surface defect of slab, the oxidizing prevention agent having metallic Cr powder as the main composition is coated on the slab surface at 50-300 mum film thickness. In succession, after heating and holding this slab in the heating furnace in the temp. range of 1080-1200 deg.C, it is hot-rolled by the continuously hot-rolling mill to obtain the pure nickel hot coil.
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