Self-shielded flux-cored wire for generating slag coating with special protective performance and preparation method

Abstract

The invention discloses a self-shielded flux-cored wire for generating a slag coating with special protective performance and a preparation method. The self-shielded flux-cored wire comprises a low-carbon steel strip and flux-cored powder, the flux-cored powder is filled into the low-carbon steel strip and comprises the following components including, by mass, 60%-80% of glass powder, 2%-8% of zirconium oxide powder, 0.05%-0.85% of graphene powder, 2%-8% of potassium sodium carbonate powder, 1%-3% of potassium titanate powder, 2%-5% of rutile powder, 1%-5% of emery powder, 1%-3% of sodium fluosilicate powder and the balance iron powder, and the flux-cored powder accounts for 13%-25% of the total weight of the welding wire. The self-shielded flux-cored wire and the preparation method have the advantages that the slag removal procedure is omitted, waste slag discharge is reduced, and the material utilization rate is increased, and the slag coating has special protection functions such asseawater corrosion prevention. According to the self-shielded flux-cored wire and the preparation method, traditional pursuit of improving the deslagging property is changed, the strong slag bondingwelding wire is developed for the first time, waste slag is changed into the protective coating, the molten slag is subjected to coating treatment, the function of the molten slag is expanded, and theone-time forming preparation technology of a base body / the coating is developed.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a self-protecting flux-cored welding wire with special protective performance slag coating and a preparation method thereof. Background technique [0002] Since the birth of welding technology, although welding slag has played an important role in the welding metallurgical process, it has been treated as an inevitable by-product. It needs to be cleaned after welding, which consumes a lot of man-hours, and the discharge of waste slag is also harmful to the environment. cause serious pollution. When developing self-shielding flux-cored welding wire, slag removal is one of the key process performance indicators, and the sticky slag is often difficult to remove, which restricts the welding process performance. [0003] On the one hand, slag removal after welding is a necessary welding process; on the other hand, in order to make the weld after we...

AI Technical Summary

Problems solved by technology

[0003] On the one hand, slag removal after welding is a necessary welding process; on the other hand, in order to make the weld after welding meet special performance requirements such as weather resistance and corrosion resistance, secondary coating treatment is required, which greatly wastes man-hours and increases energy consumption, waste of resources

For example, when welding repairs to ships or other water body structures, using traditional welding materials not only requires a post-weld slag removal procedure, but also requires coating of seawater corrosion-resistant coatings on the welds after welding, which is very unfavorable for rapid on-site operations

[0004] Up to now, humans still treat slag as a waste slag that must be removed. There is no report on using slag as a beneficial coating that can achieve surface modification, and there is no use of welding technology for double-layer functional metal structural parts. Related reports on one-time preparation and molding

Images