Inconel 601镍基高温合金真空感应熔炼脱氧工艺研究

Deoxidation During Vacuum Induction Melting of Inconel 601 Alloy

研究了采用国产大型真空感应炉熔炼Inconel 601镍基高温合金的脱氧工艺。从热力学上计算了合金熔液中碳氧反应平衡值。通过调整熔炼工艺参数,确定了影响氧含量及合金轧制质量的工艺参数最佳范围。结果表明:熔化时间为365~370 min、真空度为1.0~1.2 Pa及C初始加入量为0.050%时,合金氧含量可降至10×10^(-6)以内,脱氧率可达90%以上。采用6 t国产大型真空感应炉可生产出高纯净度的镍基高温合金产品。

The deoxidation process in vacuum induction melting of Inconel 601 alloy by using of large-scale vacuum induction furnace made in China was studied.The equilibrium values of C-O reactions in liquid alloy were calculated from thermodynamics.The best ranges of parameters having influence on the oxygen content during vacuum induction melting and the quality of rolled sheet were determined by adjusting the parameters of melting process.The results showed that the oxygen content of molten alloy could be controlled to below 10×10^(-6)and more than 90%of oxygen could be reduced during the melting,when the melting time was prolonged to 365-370 min and the vacuum degree was improved to be above of 1.2 Pa and the initial addition content of carbon was about 0.050%.High purity Ni-base superalloy could be produced by using of 6 t domestic large-scale vacuum induction furnace.