Hot continuous rolling strip steel inclusion control method and hot continuous rolling strip steel
The invention relates to a hot continuous rolling strip steel inclusion control method and hot continuous rolling strip steel, and the method comprises the following steps: firstly, adding an aluminum-containing iron alloy into molten steel in a tapping process for deoxidation and alloying; stirring...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to a hot continuous rolling strip steel inclusion control method and hot continuous rolling strip steel, and the method comprises the following steps: firstly, adding an aluminum-containing iron alloy into molten steel in a tapping process for deoxidation and alloying; stirring and desulfurizing in the LF refining process; argon is blown to the bottom of the steel ladle after the RH enters the station; then RH vacuum treatment is conducted, and light-burned dolomite and lime are sequentially added into molten steel; and finally, argon is blown to the bottom of the steel ladle, and calcium aluminate in the molten steel is removed. According to the method, low-alkalinity slag is adopted on the premise that S adjustment is met in the initial stage of refining, a small amount of slag charge with specific components is added according to the Al content in molten steel in the later stage of refining, Al2O3 inclusion modification is achieved twice through a two-step steel slag reaction, and fin |
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