摘要
不同类别硬线制品的直径不同,对钢中非金属夹杂物的控制要求也有所不同,对子午线轮胎用帘线钢,在炉外精炼时应采用较低的炉渣碱度,炉渣Al2O3质量分数控制在7%以下,钢液wAl控制在(2～5)×10-6,以使钢中夹杂物成为塑性夹杂物.对于直径大于5 mm的高强度预应力钢丝、钢绞线用硬线钢,则可以采用铝脱氧工艺,降低钢中O含量,并采用高碱度和高还原性炉渣进行炉外精炼,使钢中夹杂物绝大多数为微小尺寸的球状钙硅铝酸盐类夹杂.
The requests for the non-metallic inclusion control are different of hard wire steels which products are in different diameters. For Tyre cord steels,lower basicity slag should be used in the secondary refining and the Al2O3 content of the slag should he less than 7%. The [ Al] in the liquid steel should be controlled within the range of （2 - 5） × 10^-6 so as to form deformable inclusions in the steels. For steels of high strength prestressed wire and stranded wire which diameters are usually larger than 5 mm,method of aluminum deoxidation in steelmaking can be used to lower the [ O] content. In addition, slag of high basicity and low Fe1O content should be made in the secondary refining, through which small sized spherical non-metallic inclusions of CaO-SiO2-Al2O3 system are formed.
出处
《金属制品》
2005年第5期9-13,20,共6页
Metal Products
关键词
硬线
钢帘线
钢绞线
非金属夹杂物
炉外精炼
hard wire steels
steel cord
stranded wire
non-metallic inclusions
secondary refining
