Through laboratory and industrial experimental research, it is concluded that silicon manganese nitride can play a role in increasing nitrogen in steel. When silicon manganese nitride is added in the later stage of LF refining, the nitrogen yield is relatively stable, with an average of 24%.
Adding nitrogen to steel with silicon manganese nitride will not affect the content of inclusions in the steel. The metallographic inspection results and low-temperature impact properties of the finished steel all meet the standard requirements of the corresponding steel types. For a long time, the nitrogen-increasing agent used in steelmaking plants to produce nitrogen-containing steel is vanadium-nitrogen alloy. With the adjustment of ferroalloy market prices, it is necessary to find a low-cost alloy that can meet the nitrogen content requirements of steel types while ensuring steel quality.
The nitrogen content in silicon manganese nitride is on average. In order to determine whether silicon manganese nitride can be used as a nitrogen-increasing agent in steelmaking and what effect it has on the quality of steel, an experimental study on the application of silicon manganese nitride in steel was conducted. Laboratory research was conducted on the induction furnace for the addition method of silicon manganese nitride and the effect of nitrogen addition, and to initially understand its yield. During the experiment, the amount of silicon manganese nitride added together with the charge was 22g. The experimental results showed that the average nitrogen yield in silicon manganese nitride was 26.2%. It can be seen that silicon manganese nitride can play a nitrogen-increasing role in steel. Compared with the average nitrogen yield in vanadium-nitrogen alloy, it can be preliminarily believed that the nitrogen yield in steel using silicon-manganese nitride is half that of vanadium-nitrogen alloy.
