摘要
衡钢采用硅钙脱氧工艺、控制EAF钢水中全氧含量、LF渣系中Al2O3含量、控制精炼时间≥40 min、VD真空脱气、软吹时间≥20 min、保护浇注防止钢水二次氧化和促使钢中夹杂物上浮等应用工艺措施,可有效降低钢水中B类夹杂物Al2O3数量和尺寸以提高钢的洁净度。生产实践表明:油缸钢生产中精炼炉控制钢水[Al]s≤0.004%、T[O]≤0.0020%、精炼终渣(FeO)≤0.8%、碱度(R)控制在2.0~3.2有利于B类夹杂物控制。当B类夹杂物不超过1.0级有利于控制刮滚工艺"白点"的产生。
The measures as applying the process of Si-Ca deoxidation,controlling the total content of oxygen in the EAF molten steel and the content of Al2 O3 in LF slag,Control refining time ≥40 min,vacuum degassing(VD),control soft blow time ≥20 min,and protecting cast to prevent secondary oxidation of the molten steel and promote the floating of inclusions in the steel are adopted at Hengsteel.The number and size of Grade B inclusion Al_(2)0_(3) in the molten steel are reduced to improve the cleanliness of steel.Production practice shows that controlling steel [Al] s≤0.004%,T[O]≤0.002 0%,refined final slag(FeO)≤0.8% and alkalinity(R) between 2.0 and 3.2 in liquid of hydraulic cylinder steel are availalble to control Grade B inclusion.Grade B inclusions not exceeding class 1.0 is beneficial to control the production of "white spots" in the SRB process.
作者
肖鸿光
Xiao Hongguang(Technology Center of Hunan Hengyang Valin Steel Pipe Co Ltd,Hengyang,421001)
出处
《特殊钢》
2021年第4期51-55,共5页
Special Steel