摘要
综述了钢帘线和切割丝用钢"BOF-LF精炼-连续浇铸"工艺过程中夹杂物的控制技术。冶炼过程中通常采用Si—Mn脱氧,严格控制钢液中的Als及低碱度(CaO/SiO_2≤1.0)渣系精炼等措施实现钢中夹杂物塑性化。生产实践表明,夹杂物塑性化并不完全等于低熔点化,一些厂家切割丝用盘条中MnO—SiO_2-Al_2O_3系夹杂并未控制在低熔点区域,但轧制过程变形良好;生产过程中应避免由耐火材料引起的硬质外来夹杂;浇铸所涉及的Al_2O_3质耐火材料改用非Al_2O_3质材料可有效降低盘条拉拔过程中的断丝率。
The control technology of inclusions in steel for tyre cord and saw wire in ＂BOF-LF refining-Bloom CC＂ process is summarily reviewed. The plasticization of inclusions in steel is realized by using the measures including using Si- Mn deoxidation, strictly controlling Als content in liquid and refining with low basieity （ CaO/SiO2 ≤ 1.0） slag. Production practice shows that the plasticization of inclusions in steel is not fully equal to controlling inclusion in low-melting point re- gion, at some steelworks the MnO-SiO2-Al2O3 series inclusions in coil for saw wire are not controlled in low-melting point region but these inclusions are nicely deformable during rolling process. The exogenous inclusions caused by refractories should be avoided in production process and the frequency of wire breakage could be remarkably reduced by changing the Al2O3 based refractories used in casting process into non-Al2O3 based refractory materials.
出处
《特殊钢》
北大核心
2016年第2期26-31,共6页
Special Steel
基金
国家自然科学资金项目资助(51304013)
