论文部分内容阅读
运用热力学计算了X120管线钢含钛夹杂物在钢液中的析出条件,以X120管线钢钛的目标成分w(Ti)=0.015%计算,当w(Al)=0.000 35%～0.003 30%时,生成Al2O3.TiO2;w(Al)>0.003 30%时,则有Al2O3生成;要生成纯的MgO夹杂,钢中w(Mg)>1.62×1013;w(Mg)=0.000 8%就可以生成2MgO.TiO2复合夹杂;X120管线钢没有纯的MgO夹杂,X120管线钢中会生成2MgO.Ti2O3、MgO.Al2O3、SiO2、Al2O3、Ti2O3、MnO等脱氧产物,这些脱氧产物还会和硫化物一起形成复合夹杂物。对夹杂物扫描电镜的观察与热力学计算的结果一致。在扫描电镜下观察了含钛夹杂物对铁素体的诱导,表明X120管线钢中含钛夹杂具有很好的诱导铁素体形核能力。
The conditions for the precipitation of inclusions containing X120 in the liquid steel of X120 pipeline steel were calculated using thermodynamics. When the w (Al) = 0.000 35% ~ 0.003 30% (Mg) = 1.62 × 1013 w (Mg) = 0.000 8% can be generated when the Al 2 O 3 .i 2 O 2 is formed when the content of Al MgO.Al2O3, SiO2, Al2O3, Ti2O3, MnO and other deoxidation products, these deoxidation products will also form together with the sulfide Compound inclusions. Observations of inclusions by scanning electron microscopy and thermodynamic calculations are consistent. Under the scanning electron microscope, the inclusion of titanium was observed to induce the ferrite. The results show that the inclusion of titanium in X120 pipeline steel has a good capability of inducing ferrite nucleation.