SCM435钢出钢过程钢包加钼铁的分析

ANALYSIS OF ADDITION FERRO MOLYBDENUM IN LADLE DURING THE TAPPING PROCESS OF SCM435 STEEL

SCM435合金冷镀钢广泛应用高强度螺栓,可用于生产汽车紧固零件。针对钼铁熔化不充分的问题,试验了54炉转炉、炉后出钢过程加入钼铁试验,钼铁固定加入250 kg,转炉吹氩后Mo的成分命中0. 18%～0. 21%比例为85%,不合格炉次的主要原因是出钢量波动。各工序钢水的钼含量波动不大,与吹炼前向转炉内加入钼铁中钼的收得率相当。在上述过程中加入钼铁,钼元素能均匀弥散到钢水中。由于LF炉减少了钢水冲击的强烈搅拌作用,钼铁的熔化较慢。

SCM435 alloy cold coated steel is widely used in high-strength bolts, which can be used to produce automotive fasters. Aiming at the problem of insufficient melting of ferromolybdenum, the 54 converters experiment was carried out by adding ferromolybdenum after tapping. When ferromolybdenum was fixed into 250 kg, the molybdenum hit ratio of 0.18%~0.21% after argon was 85%. The main reason for disqualification was the fluctuation of tapping quantity. The molybdenum content of molten steel in each process fluctuates little, and its yield is equivalent to the molybdenum yield which was from the ferro-molybdenum in the converter before blowing. Molybdenum can be uniformly dispersed into liquid steel by adding ferro-molybdenum in the above processes. The melting of ferro-molybdenum is slower for LF furnace reduces the strong stirring effect of molten steel.