真空感应炉冶炼焊丝钢Mn含量控制工艺

Manganese-Doping Optimization in Molten Steel for Welding-Wire in Vacuum Induction Furnace

实验研究了150 kg真空感应炉冶炼焊丝钢Mn含量控制工艺。本文设计了四种不同的冶炼方案,研究了Mn合金加入前炉内压力及钢液温度、随炉C量、返回料的使用对Mn收得率的影响情况。结果表明,随炉C量为0.08%(质量分数)且Mn在炉内压力为20000 Pa、钢液温度为1570℃的条件下加入收得率可达98.3%;纯返回料冶炼,返回料中Mn的收得率可达96%。

Here,we experimentally addressed thedopingof manganese in the molten steel,produced on industrial scale for fabrication of welding-wire,in vacuum induction furnace. The influence of the Mn-doping conditions,including but not limited to the content of deoxidization carbon,mass-ratio of recycled welding-wire,molten-steel temperature and pressureof argon atmosphere at a time when Mn was doped,on the yielding rate of Mn was investigated in metallurgical analysis. The preliminary results show that the molten steel temperature,argon pressure,carbon content and recycled material all have a major impact on the Mn-yielding rate to varying degrees. To be specific,under the optimized conditions： with a C-content of 0. 08%（ wt.） at 1570℃ and 20000 Pa,the Mn-yielding rate of98. 3% was regularly achieved. In the case of recycling welding-wire only,the Mn-yielding rate was estimated to be approximately 96%.