A kind of IF steel rh vacuum decarburization process control method

Abstract

The invention discloses an IF steel RH vacuum decarburization process control method. The method comprises the steps of: creating a decarburization control model in the vacuum decarburization process, performing actual operation according to parameters output by the decarburization control model to control the vacuum decarburization process, wherein the parameters of the decarburization control model comprise initial condition of molten steel, oxygen blowing quantity, addition amount of tempering steel scrap, addition amount of deoxidized carbon powder and addition amount of aluminum particles; the decarburization control model can automatically calculate the necessary oxygen blowing quantity, the addition amount of tempering steel scrap and the addition amount of deoxidized carbon powder in the decarburization process according to the initial condition of molten steel, predict the content of active oxygen at the decarburization termination and calculate the necessary addition amount of aluminum particles for deoxidization and alloying. The IF steel RH vacuum decarburization process control model provided by the invention well meets the production demands, and an operator controls the production process according to the calculation values of the model, thereby improving the hit rate of IF steel oxygen blowing, effectively reducing the content of active oxygen at the IF steel decarburization termination and reducing the consumption of the aluminum particles.

Description

technical field [0001] The invention belongs to the technical field of ultra-low carbon steel production process control and manufacturing, and in particular relates to a process control method for RH vacuum decarburization of IF steel. Background technique [0002] At present, in the existing technology, IF steel, the full name is Interstitial-FreeSteel, that is, interstitial-free steel, sometimes also called ultra-low carbon steel, has excellent deep drawing performance, and now the elongation and r value can reach 50%. And above 2.0, it has been widely used in the automobile industry. The full name of RH refining is RH vacuum circulation degassing refining method. Invented by the Germans in 1959, RH is the first letter of the two German manufacturers that adopted RH refining technology at that time. [0003] IF steel is a typical steel type in high-grade automobile plates, and it is one of the important symbols to measure the production of automobile steel plates in a c...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that due to the lack of special IF steel RH vacuum decarburization process control in the prior art, improper control of the oxygen content at the decarburization end point will cause the carbon content of some furnaces to exceed the standard; or only by establishing The decarburization control model of the IF steel decarburization process can stably control the carbon content, but it puts forward higher requirements for the converter. If there is overoxidized molten steel at the end of the converter, the model cannot take measures to effectively reduce the decarburization end-point activity oxygen content and other technologies. problem, and provides a method for controlling IF steel RH vacuum decarburization process