通过80 t LD-LF(VD)-CC流程,采用转炉出钢铝沉淀脱氧,出钢后加铝粉强扩散脱氧工艺所生产的 60Si2Mn弹簧钢铸坯总氧含量(T.0)为10×10
-6
[S
]
0.005%
[P
]
0.010%。分析结果表明,LF末期和VD末期钢 水中的夹杂物主要为CaO(MgO)-Al
2
0
3
-CaS-Si0
2
系;铸坯中的夹杂物主要为CaO(MgO)-Al
2
0
3
-CaS-SiO
2
-TiN复合 夹杂。因为连铸时保护浇铸不当,使[N
]
增加,促使铸坯含TiN夹杂。
Abstract
Spring steel 60Si2Mn produced by 80 tLD-LF(VD)-CC flow sheet using aluminum killing during tap- ping and aluminum powder strong diffusion deoxidation after tapping to get total oxygen content(T.0)in billet of steel 10×10
-6
[S
]
0.005%
[P
]
0.010%。Analysis results showed that the main inclusion in steel at end phase of LF and end phase of VD was CaO(MgO)-Al
2
O
3
-CaS-SiO
2
series
the main inclusion in billet was CaO(MgO)-Al
2
0
3
-CaS-SiO
2
- TiN compound inclusion. As shielding practice was unsuitable led to increasing[N