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通过采用锰铁、硅铁合金预脱氧,钛、锆单独或复合终脱氧的脱氧制度,研究了某低碳钢种脱氧后,钢中夹杂物的形貌、成分、尺寸分布情况。结果表明:采用Zr、Ti脱氧可以获得尺寸较小且数量较多的夹杂物粒子,加Ti后试样中的夹杂物主要为TixOy,Al2O3,MnS的复合夹杂;加Zr试样,钢中夹杂物主要为ZrxOy,SiO2,Al2O3,MnS系复合夹杂;复合添加Ti、Zr的试样,其夹杂物主要为ZrxOy,TixOy,SiO2,Al2O3,MnS复合夹杂物。Zr,Ti复合氧化物粒子能促进晶内针状铁素体形成。
The morphology, composition and size distribution of inclusions in steel after deoxidation of a low carbon steel were studied by adopting deoxidation system of ferromanganese, ferrosilicon alloy pre-deoxidation, titanium, zirconium alone or composite final deoxidation. The results show that inclusions with smaller size and larger number of inclusions can be obtained by deoxidation of Zr and Ti. The inclusions in samples after Ti addition are mainly composed of composite inclusions of TixOy, Al2O3 and MnS. The main inclusions are ZrxOy, SiO2, Al2O3 and MnS composite inclusions; the samples of Ti and Zr are compoundly added, and the inclusions are mainly composed of ZrxOy, TixOy, SiO2, Al2O3 and MnS composite inclusions. Zr, Ti composite oxide particles can promote intragranular acicular ferrite formation.