Practice of improving Cr yield rate during smelting GX12CrMoWVNbN10-1-1 steel with return blowing oxygen method
The Cr yield rate was low during smelting GX12CrMoWVNbN10-1-1 steel with 100 ％ returns (return blowing oxygen method).Aiming at this problem,the smelting process was optimized.By increasing the quantity of ferrosilicon added with the burden,raising the temperatures of both start blowing and end blowing,average Cr yield rate at the melting down was increased from 51.55 ％ to 76.29 ％,and the average Cr yield rate at the endpoint was increased from 40.49 ％ to 56.11％.
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