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Effect of Titanium Addition on the Solidification Microstructure of High Pure Ferritic Stainless Steels

机译：钛添加对高纯铁素体不锈钢凝固微观结构的影响

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Solidification microstructure and inclusions of the ingots,which are the raw material in the process of rolling and heat treatment,have great effects on the properties of final products.Niobium and titanium are used to react with carbon and nitrogen to improve the properties of the high pure ferritic stainless steels.In the research,combined with thermodynamic calculation,effects of titanium addition on solidification microstructure and inclusions formed before and in the process of solidification were investigated by optical microscope,scanning electron microscope and energy disperse spectroscope for three high pure ferritic stainless steels with different titanium additions.Results show that Al2O3 and a few (Nb,Ti)N precipitated when titanium addition was 0.01％.Well-distributed TiN and Al2O3-TiOx-TiN afforded nuclei to solidification process so that the ratios of equiaxed zone increased with the titanium addition.The ratio increased from 42.1％ to 64.0％ with the titanium addition increased from 0.01％ to 0.10％ and the ratio increased to 85.7％ when the titanium addition is 0.34％.
机译：铸锭的凝固微观结构和夹杂物是轧制和热处理过程中的原料，对最终产物的性质具有很大的影响。尼碘和钛用于与碳和氮气反应以改善高的性质纯铁素体不锈钢。在研究中，通过光学显微镜，三个高纯铁素体不锈钢，扫描电子显微镜和能量分散光谱，研究了热力学计算，钛​​添加了钛的凝固微观结构和夹杂物的效果。具有不同钛添加的钢。结果表明，当钛添加为0.01％，分布锡和Al2O3-TiOx-tiN沉淀的Al2O3和几（Nb，Ti）N沉淀到凝固过程中，使得等轴带的比率增加用钛的加法。与钛加入Incr，比率从42.1％增加到64.0％增加到64.0％当钛添加为0.34％时，减少0.01％至0.10％，比率增加到85.7％。

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