板坯连铸机ASTC动态辊缝精度控制实践

为解决中心偏析、疏松及裂纹对连铸坯表面及内部质量造成的影响及避免连铸机拉坯阻力过大导致的夹坯事故,对连铸机辊缝精度低下的原因进行了分析,提出了解决方法,通过采取控制连铸辊零部件及其装配精度、辊子堆焊表面硬度、提高扇形段维修安装对弧精度、计算并分析在线辊缝校正规律等措施,提高了连铸机产品的质量。

Practice of Controlling Precision of ASTC Dynamic Roll Gap of Slab Continuous Caster

In order to solve the problem of bad effects of center segregations, porosities and cracks on both the surface quality and internal quality of continuous casting billets and also avoid the trouble of billet nipping caused by excessive slab drawing resistance from the continuous caster, the causes leading to low precision of the roll gap in caster were analyzed and thus some solutions were proposed. As a result the quality of billets produced by the continuous caster was improved by taking such measures as controlling the precision of both the parts of the continuous casting roller and its build-up members, controlling the surface hardness in the build-up welding region of the roller, improving the precision of the arc alignment in maintaining and reinstalling the fan-shaped section and calculating and analyzing the regularity for online correcting the roll gap.