比较分析了国内外不同钢铁企业的工艺流程及其控制效果。各企业采用的工艺虽不尽相同,但其核心都是降低钢液的氧含量及对夹杂物进行控制。在脱氧工艺中,合成渣精炼已成为生产超低氧弹簧钢的一个重要途径;在夹杂物控制上,一方面要尽量降低钢中的夹杂物含量,另一方面可以通过氧化物冶金技术,利用某些夹杂物细小弥散及熔点高的特点来细化晶粒,从而提高钢的质量。
A great amount of metallurgical process techniques were proposed in recent years in order to achieve cleanness spring steel.Various techniques used in steel companies,including domestic and abroad,as well as the final qualities of oxygen content controlling were reviewed and compared.Although different techniques were employed in these companies,the key issues of these processing techniques were to reduce the oxygen content in steel and minimize the inclusions in the final products.Based on the comparison,synthetic slag has already become an important way to produce ultra-low-oxygen spring steel in refining stages.In the aspect of inclusion control,traditional consideration is to minimize the amount and size of inclusions;meanwhile,another promising way to deal with these inclusions is oxide metallurgy,which utilizes certain well-dispersed non-metallic oxides with characteristics of high melting point,small particle so as to grain refinement of spring steel.
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