Detection method for protection slag of continuous casting crystallizer in thermal state lubrication friction state

Abstract

The invention provides a detection method of a continuous casting crystallizer protection slag hot lubrication friction sate, belonging to the field of metallurgical continuous casting detection technique. The method is based on the combination of heat transmission and friction behavior calculation of practically measured temperature of the crystallizer and reflects the hot lubrication friction state of the protection slag during the continuous casting production process; the method comprises the following main steps of: heat transmission calculation on the basis of practically measured temperature of the crystallizer, calculation of the liquid protection slag film between the crystallizer and the casting billet, and the calculation of the hot lubrication friction state of the protection slag; the method has the advantages that the mixed lubrication theory is led in so as to lead the analysis to the friction behavior to be more specific and reasonable; the practically measured data onthe basis of temperature of the crystallizer can simulate and calculate the lubrication friction state of the protection slag on the surface of the casting billet under practical working condition; various displays of the lubrication states can be achieved by utilizing the calculation results of friction stress at all node positions on the surface of the casting billets, thus providing the basis for the prediction of surface quality and the analysis of the lubrication characteristic of the casting billet surface; and the method is easy to be achieved on the basis of heat transmission calculation of the crystallizer and has strong practicability and portability.

Description

technical field [0001] The invention relates to a detection method for the thermal lubrication and friction state of mold slag in a continuous casting crystallizer, and belongs to the technical field of metallurgical continuous casting detection. Background technique [0002] As an important production material in the continuous casting process, mold powder plays an important role in lubrication, heat preservation, oxidation prevention and inclusion absorption. The molten mold slag in the crystallizer flows into the gap along the channel between the billet and the mold due to the vibration of the mold and the capillary action between the copper wall of the mold and the billet at the meniscus around it. Mold powder film for lubrication. The lubricating effect of mold slag is very important to continuous casting production. Once there is poor lubrication, it will lead to various defects on the surface of the slab, and even cause a breakout accident. [0003] Usually, the res...

AI Technical Summary

Problems solved by technology

However, the treatment method for the frictional behavior of the slab surface in this work is too simple. It can only conduct a rough qualitative analysis of the lubrication characteristics of the mold slag under ideal conditions, and cannot realize the detection of the thermal lubrication friction state of the mold slag, which is not of practical value.

At present, there are no technical and patent reports on the detection of mold flux thermal lubrication friction state

Images