In this paper, weak water cooling technology by wiper is introduced for the casting of 520 ×1650 mm 7A55 alloy slabs. By analyzing from experiment comprehensively, it indicates that the position of wiper will exert big influence on slab quality. Under the conditions of the experiment, if wiper height is below the bottom of sump, there will be more than 70% possibility for slab to have cracks. If it is excessively higher than 80 mm, the top of the sump, porosity will incur and macro-segregation will be enlarged. The experiment determines the correct height of wiper.
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机译：本文介绍了用刮水器弱水冷却技术铸造520×1650 mm 7A55合金铸坯的方法。通过实验综合分析，表明刮水器的位置将对板坯质量产生较大影响。在实验条件下，如果刮水器高度低于集水坑的底部，则平板有超过70％的可能性产生裂纹。如果高度超过80毫米，则油底壳顶部会产生孔隙，并且宏观偏析会扩大。实验确定正确的刮水器高度。
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