KR970033269A - How to measure cast iron defects in continuous casting of steel small section billet - Google Patents

Abstract

The present invention relates to a method for measuring cast defects during continuous casting of small cross-section billet of steel, and the surface temperature of the cast steel is different when the non-uniform solidification occurs during continuous casting of small cross-section billet. By inserting a thermocouple to indirectly measure the temperature deviation and use it, it is to provide a method that can measure the slab deformation and crack defects during casting during casting.

The present invention is a small cross-section billet continuous casting apparatus through the mold housing and the coolant jacket in turn to insert a plurality of thermocouples in the direction perpendicular to the casting direction in the bottom of the mold to measure the mold temperature continuously and then measured Calculating a mold temperature deviation with respect to the mold temperature, and cutting the cast after casting to measure a diagonal length difference (casting capacity deformation) and crack occurrence of the cast; Obtaining a correlation between the mold temperature deviation and the cast iron deformation amount measured as described above; Obtaining a correlation between the main strain deformation and the presence of cracks; And casting the mold temperature deviation by the thermocouple during casting, and substituting the correlation between the mold temperature deviation and the casting function amount to determine the casting function strain, and then determining the casting function strain. The main point of the method is to measure the main defects during continuous casting of small section billet of steel including the step of judging crack occurrence by substituting the correlation with crack occurrence.

Description

How to measure cast iron defects in continuous casting of steel small section billet

Since this is an open matter, no full text was included.

1 is a schematic diagram of a small cross-section billet continuous casting apparatus that can be applied to the present invention.

3 is a cross-sectional view showing an example of a thermocouple inserting means for inserting a thermocouple into a mold of a small section billet continuous casting apparatus when measuring the mold temperature according to the present invention.

4 is a schematic diagram schematically showing an example of a position where a thermocouple can be inserted according to the present invention.

Claims (3)

It includes a mold in which molten steel is injected into the mold, a coolant jacket positioned at regular intervals to form a coolant passage, and a mold housing positioned at an external interval at a predetermined interval from the coolant jacket to maintain the mold. In the small-section billet continuous casting apparatus, a plurality of thermocouples are inserted in the mold perpendicular to the casting direction through the mold housing and the coolant jacket in order to continuously measure the mold temperature, and then to the measured mold temperature. Obtaining a mold temperature deviation for the mold and cutting the cast steel after casting to measure a diagonal length difference and crack occurrence of the cast steel; Obtaining a correlation between the mold temperature deviation and the cast iron deformation amount measured as described above; Obtaining the correlation between the deformation of the cast iron function and the presence or absence of crack generation, and measuring the mold temperature deviation by the thermocouple during casting, and substituting the correlation between the mold temperature deviation and the cast iron strain, And determining the crack occurrence by substituting the cast function deformation amount into the correlation between the cast product deformation amount and the crack occurrence status, and determining the crack occurrence. The method of claim 1, wherein the thermocouple is inserted into the mold by a thermocouple inserting means (10) comprising a thermocouple receiving hole (11) and a male screw portion (12) screwed to the cooling water jacket. Determination of cast defects during continuous casting of single-side billet. The correlation between the mold temperature deviation and the cast capacity deformation amount according to claim 1 or 2 Molding strain (mm) = 0.56 × Casting temperature deviation (℃) -2.6 Cast iron defect measurement method during the continuous casting of the small cross-section billet of steel, characterized in that it is represented by ※ Note: The disclosure is based on the initial application.