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过去,我国在钢中应用稀土元素的主要方法是在钢包内投入(即冲入法)。这种工艺虽操作简单,但由于稀土元素化学性质非常活泼,因此在稀土原料向钢液中投放冲入时,易于造成大量燃烧,污染环境及钢的材质,并造成加入工艺不稳定,对钢的性能的改善效果差。经山东大学提出钢包压入法(插入法),在北京重型电机厂用近四年的时间进行试验,目前已获得很大进展。这项工艺是在ZG20CrMov钢中加入0.1％的稀土金属,采用1.5吨电炉和5吨钢包,结合生产进行。操作时,
In the past, China’s main method of applying rare earth elements in steel was to put it into the ladle (ie into the law). Although this process is simple, but due to the very lively chemical properties of rare earth elements, the rare earth raw materials into the molten steel into the red, easy to cause a lot of burning, polluting the environment and the material of the steel, and lead to unstable joining process, the steel Poor performance improvement. The Shandong University put ladle into the law (insert method), heavy-duty motor plant in Beijing for nearly four years of testing, has made great progress. The process is the addition of 0.1% rare earth metal to the ZG20CrMov steel using a 1.5-ton electric furnace and 5 tons of ladle in combination with production. When operating,