Y15高硫易切削钢氧含量与硫化物形态控制工艺

Technology of Control of Oxygen Content and Sulfide Morphology in High Sulfur Free Cutting Steel Y15

西宁特钢Y15易切削钢(%:0.10～0.15C、1.00～1.20Mn、0.30S)由25 t EAF-LF-657 kg铸锭流程生产。试验结果表明,通过控制电弧炉氧化终点[C]0.06%～0.10%和脱氧工艺将[O]控制在(150～250)×10^(-6),控制钢中Mn/S=2.77、O/S=0.059时,钢中夹杂物大多数为(Mn,Fe)S和硫化物包裹氧化物,少数为MnS,使钢具有良好的切削性能。

Free cutting steel Y15 （0. 10 -0. 15C, 1.00 ～1.20Mn, 0. 30S） is produced by 25 t EAF-LF-657 kg ingot flow sheet at Xining Special Steel. Test results indicated that with controlling arc furnace oxidizing end [ C] 0. 06% ～ 0. 10% and in deoxidation process to control [O] （ 150～250）×10^-6, Mn/S =2. 77 and O/S =0. 059 in steel, most inclusions in steel were （ Mn, Fe） S and sulfide wrapped up oxide, and a small number of inclusion was MnS to enable the steel having excellent cutting property.