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采用不同炉渣碱度和精炼工艺,对弹簧钢中全氧含量,夹杂物的尺寸、大小和成分进行了分析,并对夹杂物的形态分布进行了研究.结果表明,碱度高有利于脱氧和控制夹杂物尺寸,但容易形成脆性夹杂物;炉渣碱度低时,钢中氧含量相对较高,夹杂物尺寸偏大.弹簧钢要保证夹杂物的塑性,应将炉渣碱度控制在1.0~1.3,同时应适当延长软吹时间,保证钢中大颗粒夹杂的去除和钢中氧含量的降低.
Using different slag basicity and refining technology, the content of total oxygen and the size, size and composition of inclusions in spring steel were analyzed and the morphology distribution of inclusions was studied.The results showed that the high alkalinity is good for deoxidation and Controlled inclusion size, but easy to form brittle inclusions; slag basicity is low, the relatively high oxygen content in steel, inclusions size is too large. Spring steel to ensure inclusion plasticity, slag basicity should be controlled at 1.0 ~ 1.3, at the same time should be extended soft blowing time to ensure the removal of large inclusions in steel and reduce the oxygen content of steel.