【摘要】 在对管线钢中硫化物的作用进行综合分析的基础上,结合莱钢的生产实践,利用冶金热力学原理,分析计算了管线钢硫化物的钙处理工艺条件,并对管线钢中的夹杂物进行了检测分析。结果表明,莱钢生产管线钢时,大部分炉次精炼终点氧质量分数高于理论计算钙处理所需的目标氧质量分数3.42×10-6,钢中钙质量分数未达到理论计算钙硫平衡时所需的量,硫化物夹杂物变性并不完全,钢中存在MnS、MnS-CaS复合夹杂物。更多还原

【Abstract】 On the basis of analysis of the effect of sulpfide on pipeline steel,the production conditions of calcium-treatment on sulphide inclusion in pipeline steel were analyzed by using the principle of metallurgical thermodynamics with consideration of production practice of Laiwu Steel,and the inclusions in pipeline steel were examined.The results show that,during the refining of pipeline steel in Laiwu Steel,the final dissolved oxygen content in molten steel for most of the heats are higher than the theoretical value of 3.42×10-6 required for calcium-treatment,and the calcium content in molten steel has not reached the equilibrium value of calcium and sulfur,therefore,the sulfide inclusions have not been modified completely,and there are some MnS and MnS-CaS in pipeline steel.更多还原