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经研究了6年之后,125吨以内电渣锭生产的冶金和工艺技术问题已得到解决。本报告叙述了有关直径2300毫米电渣锭生产的最新成果。金属熔池中的氢含量与电极中的同样低,并用一种新的脱氧技术可得到低于0.010%的含铝量而不恶化所希望的金属——熔渣间的反应。直径2300毫米电渣锭证明整个横截面上是定向凝固的,钢锭没有宏观偏析,显微偏析也比普通锭低,氧化物夹杂的数量少,尺寸小并且均布于整个截面上。锻件超声波探伤结果表明无缺陷,机械性能极好。至于重160吨钢锭的生产有进一步研究的必要。这种研究必须增大锻造车间的操作起吊能力。
After six years of research, the metallurgy and process technology of producing electroslag ingot within 125 tons have been solved. This report describes the latest results on the production of 2300 mm diameter ESG ingot. The hydrogen content of the metal bath is also as low as in the electrode and a new deoxidation technique yields less than 0.010% of the aluminum content without deteriorating the desired metal-slag reaction. Electroslag ingots with a diameter of 2300 mm proved that the whole cross-section was oriented solidified. There was no macroscopic segregation in the steel ingot. The microsegregation was also lower than that of the normal ingot. The amount of oxide inclusions was small, the size was small and uniformly distributed on the whole section. Forging ultrasonic testing results show no defects, excellent mechanical properties. As for the production of heavy 160 tons ingot there is a need for further research. Such research must increase the handling capacity of the forging shop.