无氧铜(TU_2)宽厚板铸坯的开发研制

The Development of Oxygen-free Copper (Tu_2) Wider-Thicker Plate Billet

规格为260 mm×1 020 mm的无氧铜(TU2)宽厚板铸坯,作为铸钢用结晶器水冷壁的最佳用材料而得到用户亲睐。但由于该铸块规格较大(厚260 mm、宽1 020 mm),铸造具有相当的难度;且无氧铜本身极易吸气,如浇铸方法选择不当,不能使熔体中的气体彻底排出而留在铸锭内部,就会产生微小气孔和疏松等缺陷,导致铸坯经热轧时,产生裂纹甚至报废。在开发该产品时,通过采取加磷脱氧、多孔二层坩埚浇铸、控制工艺参数等方法,来抑制微小气孔和疏松等缺陷,使得铸块开发得以顺利进行,并取得了成功。

As the best material for the water- cooling wall of the crystallizer, the size of 260 mm × 1 020 mm of oxygen - free copper （Tu2） wide - thick plate is welcome by the customers. Because the billet size is very large, it is very difficult for casting, and oxygen - free copper is of inhaling property, if the casting method is unfit, the air in the melting body can＇ t be taken off completely, it can occur the defect such as porosity and loose etc., when the billet is hot rolled, it can occur the crack even discard, in order to control the above defect, we used the methods adding the phosporus to remove the oxygen, pouring by the double- deck with many holes, controlling the processing parameter, it makes the development of this can carry out smoothly, and obtain the final Success .