雷家柳, 杨玲, 廖凯, 等. GCr15轴承钢120 t LF精炼终点CaO-MgO-Al2O3夹杂的特性研究[J]. 特殊钢, 2021,42(5):11-15.
雷家柳, 杨玲, 廖凯, et al. Study on Characteristics of CaO-MgO-Al2O3 Inclusions in GCr15 Bearing Steel at 120 t LF Refining[J]. Special Steel, 2021, 42(5): 11-15.
雷家柳, 杨玲, 廖凯, 等. GCr15轴承钢120 t LF精炼终点CaO-MgO-Al2O3夹杂的特性研究[J]. 特殊钢, 2021,42(5):11-15.DOI:
雷家柳, 杨玲, 廖凯, et al. Study on Characteristics of CaO-MgO-Al2O3 Inclusions in GCr15 Bearing Steel at 120 t LF Refining[J]. Special Steel, 2021, 42(5): 11-15.DOI:
inclusions in GCr15 bearing steel at LF refining end point is studied by ASPEX automatic scanning electron microscope combined with thermodynamic theory analysis. The results show that Al
2
O
3
is the main type inclusion in molten steel when the LF refining started to reach stability
and then evolves into an approximately spherical Al-Mg-Ca-( S) type composite inclusion at LF refining end. The stable phase diagram of MgO • Al
2
O
3
/CaO • A1
2
O
3
/A1
2
O
3
shows that MgO •Al
2
O
3
can be transformed into CaO-MgO-Al
2
O
3
inclusions when [ Ca
]
is greater than 1.2 x 10
-6
in molten steel. The MgO • A1
2
O
3
inclusion would be formed firstly in the refining process
afterwards
the Ca would react with MgO • A1
2
O
3
inclusion to form CaO-MgO-A1
2
O
3
composite inclusion. As a result of the precipitation of CaS inclusion in the solidification
therefor the CaO-MgO-Al
2
O
3
-(CaS) composite oxide inclusion is detected in the final steel sample.