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蠕墨铸铁具有一系列优良的机械、物理和工艺性能,作为一种新型的铸铁材质、近十余年来受到国内外铸造工作者的极大重视。当前国内试验和试生产蠕墨铸铁的单位甚多,但终因生产不够稳定而难于正常投产,生产不稳定的症结所在主要是:目前所采用的蠕化剂允许原铁水含硫量波动幅度太窄,另一方面蠕化剂的吸收率也不稳定。针对这两个问题,笔者进行了一系列的实验,发现用包钢一号稀土硅铁配合微量锑处理渡口钒钛铁铁水制取蠕墨铸铁时,允许原铁水含硫量波动幅度甚宽,还发现用旋涡冲熔法进行蠕化处理时,蠕化剂吸收率高,且稳定,试验表明采用本研究结果,有可能组织优质蠕铁的稳定生产。一、试验条件
Compacted graphite cast iron has a series of excellent mechanical, physical and technological properties, as a new type of cast iron material, castings workers at home and abroad over the past decade attracted great attention. At present, there are many units of vermicular cast iron for trial and trial production in China. However, due to the fact that the production is not stable enough yet it is difficult to put into operation normally, the crux of the production instability lies mainly in that: the presently used vermiculite allows fluctuations in the sulfur content of the original hot metal too Narrow, on the other hand, the absorption rate of the vermiculite is also unstable. In response to these two issues, the author conducted a series of experiments and found that when using Baotou Iron and Steel Co., a rare earth ferrosilicon with a trace of antimony ferritic ferritic ferritic ferrite to obtain compacted graphite iron, the original hot metal to allow sulfur content is very wide fluctuations, It has also been found that when the vermiculite is processed by the swirling melt method, the creep agent has high absorption rate and is stable, and the test shows that it is possible to organize stable production of high-quality vermicular iron using the results of this study. First, the test conditions