液芯压下工艺对CSP生产高强耐候钢力学性能的影响

Influence of Liquid Core Reduction on Mechanical Properties of High Strength Weathering Steels in Thin Slab Casting and Direct Rolling Process

珠钢在CSP流程上首次成功开发了钛微合金化高强耐候钢。通过对比采用液芯压下工艺(压下量5 mm、10mm)和非液芯压下工艺条件下铸坯和成品板的力学性能及组织,探讨了两种工艺的异同以及对铸坯和成品材的组织、性能的影响。认为采用液芯压下工艺可以很好地匹配连铸与连轧间的坯厚,铸坯各向性能更均匀,成品板材综合性能好于非液芯压下工艺。

Ti - microalloyed High Strength Weathering Steel was first produced by CSP process at Zhujiang Steel Co., Ltd., Effects of two different processes （with LCR or without LCR） on the mechanical properties and microstructure of the slab and strip were discussed. The results showed that all strips were very fine microstructure and excellent mechanical property , but mechanical properties of slab by LCR are more homegeneous, properties of strip are slightly better contrast with one of without LCR. And thickness of continuous casting slab just fit with direct rolling.