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我厂于八三年引进德马克公司R5250mm小方坯弧形连铸机,投产以来生产了碳钢和低合金钢的小方坯,经济效益明显提高。为了发展我厂连铸优势,扩大品种,进一步提高铸坯的产品质量,我们剖析了各种规格的连铸坯,对其凝固组织、偏析、内裂等作了分析和探讨,并着重对消除连铸坯脱方、内裂及有关工艺提出了一些看法。一、连铸坯的组织结构我们采用硫印和宏观腐蚀技术对连铸纵横剖面进行低倍检验和组织结构的研究。这些结果表明:连铸坯凝固组织与模铸钢基本相同,由三个区域所组成,但又具有连铸的
I plant in Germany introduced the De Mark Corporation R5250mm billet arc caster, put into production since the production of carbon steel and low alloy steel billets, significantly improved economic efficiency. In order to develop the advantage of continuous casting in our factory, expand the variety and further improve the product quality of the slab, we have analyzed the continuous casting slabs of various specifications, analyzed and discussed the solidified structure, segregation, internal crack and so on, Billet off square, internal cracking and related processes made some observations. First, the continuous casting billet organizational structure We use sulfur and macroscopic corrosion technology vertical and horizontal cross-section continuous casting cross-section test and organizational structure of the study. These results show that the solidified structure of continuous casting billet is basically the same as that of die-cast steel, and consists of three regions,