铝酸钙夹杂物的生成机制研究
来源期刊:钢铁2010年第4期
论文作者:王敏 包燕平 崔恒 吴华杰 李太全
文章页码:31 - 33
关键词:铝酸钙夹杂; 生成机制; 形核; 非均质
Key words:calcium aluminate’s inclusion; generation mechanism; nucleation; heterogeneous
摘 要:运用异质形核理论解释了钢中钙对夹杂物变性的机制过程,计算得出1 873 K下w[Al]s为0.03%时,均质形核生成Al2O3钢中溶解氧的质量分数需达到39.2×10-6,而当反应达到平衡后钢中溶解氧的质量分数为3.3×10-6。脱氧后加入钙靠均质形核很难生成CaO,钙、氧原子主要以Al2O3质点为核心在其表面上生成,生成反应为:[Ca]+(x+1/3)Al2O3=CaO·xAl2O3+2/3[Al],生成过程为Al2O3→CA6→CA2→CA→CxAy液相,并通过SEM/EDS验证了夹杂物变性的机制过程。
Abstract: The study on the generation mechanism of calcium aluminate’s inclusions was done by the means of heterogeneous nucleation theory.The calculated results show that when the acid solution aluminum is 0.03 percent and temperature is 1873K;if the Al2O3 inclusion generate in the molten by homogeneous nucleation,the dissolved oxygen must get 39.2×10-6.After Al-killed,the dissolved oxygen of getting equilibrium is about 3.3×10-6.It’s difficult to generate the CaO by homogeneous nucleation because of the low dissolved oxygen after Al-killed.The Calcium aluminates inclusion generate on the surface of Al2O3.The reaction is +(x+1/3)Al2O3=(CaO)·x(Al2O3)+2/3 and the process is Al2O3→CA6→CA2→CA→CxAy(liquid).This phenomenon is verified by SEM/EDS image.
王敏1,包燕平1,崔恒1,吴华杰1,李太全1
(1.北京市北京科技大学 冶金与生态工程学院)
摘 要:运用异质形核理论解释了钢中钙对夹杂物变性的机制过程,计算得出1 873 K下w[Al]s为0.03%时,均质形核生成Al2O3钢中溶解氧的质量分数需达到39.2×10-6,而当反应达到平衡后钢中溶解氧的质量分数为3.3×10-6。脱氧后加入钙靠均质形核很难生成CaO,钙、氧原子主要以Al2O3质点为核心在其表面上生成,生成反应为:[Ca]+(x+1/3)Al2O3=CaO·xAl2O3+2/3[Al],生成过程为Al2O3→CA6→CA2→CA→CxAy液相,并通过SEM/EDS验证了夹杂物变性的机制过程。
关键词:铝酸钙夹杂; 生成机制; 形核; 非均质