作　　者： ; ; ; ; ; ; ;

机构地区： 北京科技大学冶金与生态工程学院

出　　处： 《北京科技大学学报》 2012年第11期1262-1267,共6页

摘　　要： 借助热力学软件Thermo-Calc和ASPEX自动扫描电镜等分析手段,研究了低合金高强钢精炼过程渣--钢反应和钙处理对夹杂物改性行为的影响.通过提高炉渣碱度和w(CaO)/w(Al2O3)值以及降低炉渣氧化性等措施,钙处理前钢中Al2O3夹杂物转变为靠近1600℃液相区的CaO--MgO--Al2O3复合夹杂物和少量的MgO.Al2O3尖晶石.在渣--钢反应对Al2O3部分变性的基础上,钙线喂入量每炉由优化前的800 m减少到300 m仍能达到夹杂物改性的目的. The influences of slag-metal reaction and calcium treatment on inclusion modification in high-strength low-alloy steel were studied by means of Thermo-Calc thermodynamic software and ASPEX automated scanning electron microscope.The results of industrial trials show that by increasing the basicity,reducibility and w（CaO）/w（Al2O3） of slag,Al2O3 inclusions are partially modified to CaO-MgO-Al2O3 complex inclusions nearby the liquid phase zone at 1 600 ℃,as well as a few MgO·Al2O3 spinel.On the basis of this change,the purpose of inclusion modification is still achieved with the addition of CaSi-wire decreasing from 800m to 300m for a heat.

关 键 词： 高强钢 合金钢 精炼 夹杂物 改性

领　　域： [冶金工程]