论文部分内容阅读
电脉冲孕育是对液态金属施加一脉冲电场处理 ,使液态金属的结构发生变化 ,利用液态金属结构的遗传性来改变铸态金属组织的一种技术。在重钢 15 0mm× 2 10mm方坯连铸时对中间包电工钢钢水连续进行电脉冲孕育处理的试验表明 ,对钢水实施电脉冲孕育处理后 ,连铸坯等轴晶比例从未经处理 19%提高到88% ,未经处理铸坯存在大量粗大柱状晶 ,处理后铸坯组织主要为细小等轴晶 ,并消除了晶间裂纹 ,因此电脉冲孕育处理显著改善了铸坯组织。
Electric pulse inoculation is a technique of applying a pulsed electric field to the liquid metal to change the structure of the liquid metal and to change the as-cast metal structure by utilizing the heredity of the liquid metal structure. Continuous casting electrical steel in the tundish continuous casting of heavy steel 15 0mm × 210mm billet continuous casting experiments show that the electrical conductivity of molten steel after the impulse processing, continuous casting billet equiaxed ratio has never been processed 19 % Increased to 88%. There was a large amount of coarse columnar crystals in the untreated slab. After treatment, the slab mainly consisted of fine equiaxed grains and the intergranular cracks were eliminated. Therefore, the electrical pulse implants significantly improved the slab structure.