摘要
FactSage对钙处理前后钢液的平衡计算以及典型夹杂物在CaO-CaS-Al2O3三元相图中演变规律的研究结果表明:钢中硫含量大于0.01%(质量分数,下同)时,难以得到理想的钙处理效果,主要原因在于钙处理过程中钙主要与硫结合生成CaS夹杂,同时少部分钙将对Al2O3进行变性;钙处理过程中CaO(CaS)-Al2O3演变规律为Al2O3→Al2O3+CaO.6Al2O3+CaS→CaO.2Al2O3+CaS(CaO含量较少)→Al2O3.CaO+CaS(CaO含量较多)。通过对复合夹杂物电镜面分布扫描结果的描边处理能够有效辨别复合夹杂物的成分,发现典型CaO(CaS)-Al2O3-MgO夹杂物成分为xCaO.yAl2O3+xMgO.yAl2O3+Al2O3+CaS,并据此提出了一种新的评价钙处理效果的方法。
Equilibrium calculation using FactSage software on the composition of steel before and after calcium treatment and transition regularity of the typical inclusions in CaO-CaS-Al2O3 binary phase diagrams show that when the content of sulfur is above 0.01%,it is difficult to get ideal calcium treatment effect.The main reason is that Ca and S into CaS in the calcium treatment process,while only a small portion of Ca to denaturate Al2O3;The transition regularity of the typical CaO-CaS-Al2O3 inclusions is Al2O3→Al2O3＋CaO·6Al2O3＋CaS→CaO·2Al2O3＋CaS（with less CaO content）→Al2O3·CaO＋CaS（with more CaO content）.The stroke treatment of microscope surface distribution scanning in complex inclusion can effectively distinguish the composition of compound inclusions,and the typical CaO（CaS）-Al2O3-MgO inclusion composition is xCaO·yAl2O3＋xMgO·yAl2O3＋Al2O3＋CaS.At last,a new evaluation method of calcium treatment effects is presented.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2013年第1期9-13,22,共6页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(51074019)
