摘要
通过扫描电镜、能谱仪和电解分析研究了在110 t AOD-LF-中间包-160 mm板坯-连铸-热轧板卷生产过程304不锈钢(/%:0.03～0.04C、0.39～0.41Si、1.20～1.23Mn、0.014～0.016P、0.001～0.002S、7.95～8.00Ni、18.06～18.20Cr、0.003～0.004Al、0～0.002Ti)中夹杂物类型、形貌和成分。结果表明,在每一生产阶段都出现5～10μm球形SiO_2-CaO-MgO-Al_2O_3型夹杂,同时在AOD出钢过程产生20μm MnO-Cr_2O_3型夹杂,LF过程去除一部分MnO-Cr_2O_3夹杂,中间包和正常浇铸的铸坯中很少出现;但两炉连浇的铸坯易出现MnO-Cr_2O_3夹杂,热轧板中MnO-Cr_2O_3夹杂尺寸≤5μm。电解分析结果表明,两炉连浇铸坯中夹杂物数量(4.65 mg/10 kg)比正常浇铸的铸坯(3.08 mg/10 kg)增加了51%。
Type, morphology and ingredient of inclusions in stainless steel 304 （/% ： 0. 03 -0. 04C, 0. 39 -0. 41Si, 1.20 - 1.23Mn, 0. 014 - 0. 016P, 0. 001 - 0. 0025, 7.95 - 8.00Ni, 18.06 - 18.20Cr, 0. 003 - 0. 004A1, 0 - 0. 002Ti） during 110 t AOD-LF-tundish-160 mm slab casting-hot rolling strip coil process have been studied by SEM, energy disper- sive X-ray spectrometer and analysis by electrolysis. Results show that the 5 - 10 μm spheroidal SiO2-CaO-MgO-A1203 type inclusions occur in each steelmaking process, while the 20μm MnO-Cr2 03 inclusions form in tapping process of AOD, part of which is removed in LF refining process, and they less occur in liquid in tundish and in normal casting slab, but the MnO-Cr2O3 inclusions easily occur in two heats sequence-casting slab, the size of MnO-Cr2O3 inclusion in hot-rolled strip coil is ≤5 μm. Electrolytic analysis results show that the inclusion amount in two heats sequence-casting slab （4. 65 mg/10 kg） increases by 51% as compared with that in normal casting slab （3.08 mg/10kg）.
出处
《特殊钢》
北大核心
2013年第1期41-44,共4页
Special Steel
