新型复合(Cr,Mo)2(C,N)细化剂粉末的制备研究

    Study on Preparation of Novel Composite (Cr,Mo)2(C,N) Refiner Powders

      摘要
    • 摘要: 以Cr2O3、MoO3和炭黑等为原料,采用碳热还原氮化法在流动N2气氛中合成了新型复合(Cr,Mo)2(C,N)细化剂粉末。采用TG-DSC、XRD和SEM等研究了反应温度、保温时间和Mo含量对制备(Cr,Mo)2(C,N)细化剂的影响规律。得出以下结论院随温度升高,物相演变遵从(MoO3,Cr2O3)→(Cr2O3,Mo2C,Cr3C2)→(Cr,Mo)2(C,N)的规律曰延长保温时间,(Cr,Mo)2(C,N)的结晶度不断变大,粉末粒径不断长大曰随着钼含量的增加,(Cr,Mo)2(C,N)的晶胞体积不断膨胀,粉末粒径不断减小。

       

      Abstract: A new composite (Cr,Mo)2(C,N) refiner powder was synthesized by carbothermal reduction nitridation method in flowing N2 atmosphere with Cr2O3, MoO3 and carbon black as raw materials. The effects of reaction temperature, holding time and Mo content on the preparation of (Cr,Mo)2 (C,N) refiner were studied by TG-DSC, XRD and SEM. The following conclusions are obtained: with the increase of temperature, the phase evolution follows the rule of (MoO3,Cr2O3) →(Cr2O3, Mo2C,Cr3C2)→(Cr,Mo)2(C,N); the crystallinity of (Cr,Mo)2(C,N) is improved and the particle size of (Cr,Mo)2(C,N) powder is increased with prolonging holding time; with the increase of Mo content, the cell volume of (Cr,Mo)2 (C,N) expands and the particle size decreases.

       

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