一种控制含铝低硫钢中氧化物夹杂物的方法
By optimizing the electric furnace, LF furnace, and RH refining processes, adopting high-oxygen carbon deoxidation and low-basicity slag system for slag formation, and combining aluminum wire feeding at the end of RH refining, the problem of controlling sulfur content and oxide inclusions in aluminum-containing low-sulfur steel was solved, and the high toughness and fatigue performance of the steel were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- МААНЬШАНЬ АЙРОН ЭНД СТИЛ КО ЛТД
- Filing Date
- 2023-11-20
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to simultaneously control the sulfur content and the quantity and size of oxide inclusions in aluminum-containing low-sulfur steel, leading to a decrease in the steel's toughness and fatigue performance.
By optimizing the electric furnace smelting, LF furnace refining, and RH refining processes, high-oxygen carbon deoxidation, low-basicity slag system slag formation, enhanced diffusion deoxidation, and aluminum wire feeding at the end of RH refining, the aluminum content and oxide inclusions in the steel are controlled to achieve fine dispersion.
It effectively reduces the sulfur content in steel to below 0.005%, while controlling the B and D type inclusions to below grade 1.0 and the Ds type inclusions to below grade 1.5, thereby improving the toughness and fatigue performance of the steel.