论文部分内容阅读
1973年,一机部、冶金部上钢一厂板坯连铸攻关组采用伸入水口保护渣浇铸新工艺,攻克了连铸板坯的表面纵裂难关。在此基础上,立即着手用连铸板坯试制造船钢板。工作一开始,就遇到4C船板-40℃冲击韧性不稳定的问题。这个问题不仅表现在炉与炉之间,也表现在同一炉的各块钢板之间,还表现在同一炉的同一块钢板之上。问题较难解决。有鉴于此,我们从1975年6月开始,开展了国产船板和日本船板的冶金质量对比研究工作,以便探寻4C船板-40℃冲击韧性不稳定的原因,从而推证何种解决途径是合理可取的。
In 1973, a machinery department, the Ministry of Metallurgical Steel Plant slab continuous casting research group used to pierce the mold flux casting new technology, to overcome the surface continuous casting slab longitudinal cracking difficulties. On this basis, immediately proceed with trial cast slab shipbuilding steel plate. The beginning of the work, encountered 4C shipboard -40 ℃ impact toughness instability problem. This problem manifests itself not only between the furnace and the furnace but also between the individual plates of the same furnace and also over the same plate of the same furnace. The problem is more difficult to solve. In view of this, starting from June 1975, we carried out comparative metallurgical quality studies of domestic ship plates and Japanese ship plates in order to find out the reasons for instability of -40 ° C impact crushables of 4C, so as to find out what kind of solutions Is reasonable and desirable.