Emulsion spraying method and emulsion spraying system for producing steel types with yield strength higher than 400MPa

Abstract

An emulsion spraying method and an emulsion spraying system for producing steel types with yield strength higher than 400MPa. The method includes the steps of arranging spraying beams on intermediate rolls and working rolls on inlet sides and working rolls on outlet sides of all frames of a five-frame cold continuous rolling unit, arranging spraying beams among the frames, arranging a fine cooling spraying beam at an outlet of the fifth frame, and arranging spraying beams on surfaces of the working rolls of the third frame and the fourth frame; arranging a plurality of nozzles on the spraying beams; enabling the nozzles of the spraying beams on the intermediate rolls and the working rolls on the inlet sides of the frames to spray emulsion to roll seam areas on the inlet sides of the upper working rolls and the lower working rolls respectively; enabling the nozzles of the spraying beams on the intermediate rolls and the working rolls on the inlet sides of the frames to spray emulsion to roll seam areas of upper support rolls and lower support rolls respectively; enabling the nozzles of the spraying beams on the working rolls on the outlet sides of the frames to spray emulsion to roll seam areas on the inlet sides of the upper working rolls and the lower working rolls respectively; and enabling the nozzles of the spraying beams arranged on the surfaces of the working rolls of the third frame and the fourth frame to spray emulsion. The method eliminates frame vibration during rolling of a cold continuous rolling mill, and realizes normal and stable production of high-strength steel types in the cold continuous rolling unit.

Description

technical field [0001] The invention relates to pickling and rolling technology, in particular to an emulsion injection method and system for producing steel grades with yield strength above 400MPa. Background technique [0002] In recent years, with the rapid development of the household appliance industry and the motor industry, the demand for silicon steel products is also increasing. Due to its high magnetic induction and low iron loss, cold-rolled non-oriented silicon steel products are becoming more and more popular in the market. At present, they have replaced hot-rolled silicon steel sheets as the main raw material for the motor industry. Cold-rolled non-oriented low-grade silicon steel products are generally rolled by continuous rolling mills at present, while non-oriented high-grade silicon steel products are high in silicon and aluminum content due to their material characteristics, and their yield strength is above 400MPa, and some high-grade silicon steel produc...

AI Technical Summary

Problems solved by technology

[0004] For products with a yield strength above 400MPa, if rolling with a tandem cold rolling mill, due to its material properties and high deformation resistance, mill vibration is prone to occur during the rolling process, which may lead to strip breakage accidents, affecting production stability and product quality

[0005] If a single-stand 20-roll rolling mill is used for rolling, the production cost is high and the production efficiency is low

Images