摘要
对国内100 t EAF-LF-CC和80 t、100 t、160 t转炉-LF-CC四条生产线生产的1215系低碳高硫易切削钢(/%:0.05～0.10C、≤0.013Si、1.06～1.33Mn、0.051～0.061P、0.24～0.36S、0.012 0～0.0140[O]、≤0.005A1)进行实物分析。结果表明,国内1215低碳高硫钢成分控制特点为通过适当提高Mn含量控制钢中的Mn/S(3.7～3.9),个别流程通过降低S含量可使Mn/S达4.4;160 t转炉流程在夹杂物控制上优于其余流程(Mn/S=3.8,MnS夹杂面积和长宽比波动较小)。.由于连铸坯元素偏析较小和轧后冷却速度控制得当,80 t转炉流程和160 t转炉流程生产的钢中无明显的带状组织,而100 t电弧炉流程和100 t转炉流程生产的钢中带状组织级别为3～4。
An analysis on the products of 1215 low carbon high sulphur free-cutting steel （/% ： O. 05 ~ 0. 10C, ≤0. 013Si, 1.06 ~ 1.33Mn, 0. 051 ~ 0. 061P, 0. 24 ~ 0. 36S, O. 012 0 ~0. 014 0 [ O ] , 0. 005A1） produced by domestic 100 t EAF-LF-CC, 80 t, 100 t and 160 t BOF-LF-CC four process production line is carried out. Results show that the control characteristic of domestic 1215 low carbon high sulphur free-cutting steel is to control Mn/S （3.7 -3.9） of steel by suitable increasing Mn content in steel and for individual flow sheet is by decreasing S content in steel to get Mn/S = 4. 4 ; the inclusion control of inclusion in steel produced by 160 t BOF flow sheet （ Mn/S = 3.8, fluctuation of MnS inclusions area and length/width ratio are comparatively smaller） is better than that by others; due to smaller segregation of elements in casting billet and suitable controlling of cooling rate after rolling the steel produced by 80 t BOF flow sheet and 160 t flow sheet has no obvious banded structure, but by 100 t EAF flow sheet and 100 t BOF flow sheet the rating of banded structure is 3~4.
出处
《特殊钢》
北大核心
2013年第4期29-32,共4页
Special Steel
