Spraying process of on-line coating protection technology in high-temperature heat treatment process

Abstract

The invention relates to a spraying process of an on-line coating protection technology in a high-temperature heat treatment process. The spraying process comprises the following steps that A, a coating is added into a storage tank according to a liquid and powder; B, the powder is weighed, and the liquid is metered by a flow meter, the automatic proportioning and feeding are carried out by controlling of a system into a composite material preparation tank; C, after the composite material preparation tank is used for fully and uniformly compounding the powder and the liquid, and then the powder and the liquid are input into a spraying tank; D, the spraying tank is pressurized, and spraying preparation is automatically finished by the system; E, the oxide skin drifted away and partially pasted on the surface of a steel billet is removed and cleaned; F, after the spraying system receives a steel billet feeding signal, the coating is sent out by pressure from a nozzle, is forced to be atomized by compressed air at a nozzle port, and is uniformly sprayed on the surface of the steel billet in a sector shape; and G, air-blowing and water-washing are carried out to clean the nozzle, a machine is waited for the next steel billet. The spraying process has the effects that after metal is subjected to high-temperature heat treatment, the anti-oxidation effect is greatly improved, the yield is increased, the phosphorus removal effect is improved, the surface quality and the smoothness degree of a product are improved, the surface elements of the product are prevented from losing and enriching.

Description

technical field [0001] The invention relates to the spraying technology of steel damage, in particular to a spraying process of online coating protection technology during high temperature heat treatment. Background technique [0002] Although the research on protective coating technology in the heating process of steel billet has a long history, over the years, more steel billet surface protective coating products are limited to small-scale protective applications for special steel grades, although they have a certain influence at home and abroad. , but has not been popularized and promoted. The reasons for this result are: the application of protective coatings has just started, and the requirements for spraying equipment with high adaptability to protective coatings are extremely high. Spraying is basically carried out manually, and the protective coatings are mostly limited. Brushing and drying at room temperature to form a film and static high-temperature protection do ...

AI Technical Summary

Problems solved by technology

[0002] Although the research on protective coating technology in the heating process of steel billet has a long history, over the years, more steel billet surface protective coating products are limited to small-scale protective applications for special steel grades, although they have a certain influence at home and abroad. , but has not been popularized and promoted. The reasons for this result are: the application of protective coatings has just started, and the requirements for spraying equipment with high adaptability to protective coatings are extremely high. Spraying is basically carried out manually, and the protective coatings are mostly limited. Brushing, drying, film formation and static high temperature protection at room temperature do not match the actual steel rolling large industrial assembly line production process, which limits the promotion of billet coating protection technology

[0003] Therefore, there is no coating protection on the surface of the billet before high-temperature heat treatment. When the billet is heat-treated, the billet is directly sent into the heating furnace. This aerobic heating process will inevitably lead to the depletion and enrichment of elements on the surface of the billet, which will inevitably lead to damage to the surface of the billet. Severe oxidation and burning loss, low yield