Preparation method of flux cored wire employing wet-mixing sintered medicinal powder

Abstract

The invention discloses a preparation method of flux cored wires, particularly a preparation method of flux cored wire employing wet-mixing sintered medicinal powder, using a cold rolling steel belt as the sheath raw material of a flux-cored wire, using rutile and sintered power as main flux cored welding flux, rolling the steel belt into a U-shaped groove through longitudinal cutting, power matching and flux power drying of the steel belt, and filling welding flux in the U-shaped groove, and the steel belt is rolled and combined into an O-shaped pipe blank and further rolled and drawn into finished wires of phi 0.8 to phi 2.4 mm. The invention reduces the specific surface area of the powder, decreases moisture absorption of the powder, simultaneously has the advantages of simple and reliable process and low cost, and is worth of popularization.

Description

technical field [0001] The invention discloses a method for manufacturing flux-cored welding wire, in particular to a method for using wet-mixed sintering powder. Background technique [0002] Flux-cored welding wire is a kind of high-efficiency, safe and new-type welding material that can continuously conduct electricity and automatically weld with flux inside and steel skin outside. It is an updated product of ordinary welding rods. Flux-cored wire welding has high production efficiency, good welding quality, low overall cost, and has a series of advantages such as stable arc, small spatter, and can adjust the composition and performance of deposited metal arbitrarily. It is more suitable for flexible manufacturing than other welding materials. It can adapt to the development of materials faster, so it has become a welding material vigorously developed by countries all over the world. Flux-cored welding wire can be used for connection welding and surfacing welding; it is ...

AI Technical Summary

Problems solved by technology

[0005] The disk element method is a relatively mature manufacturing method in my country at present, but there are still many insurmountable problems in practice. First: lack of technical feasibility

Because the production technology of flux-cored welding wire is a comprehensive and multidisciplinary high-tech technology, the most critical index requirement for the quality of the final product of flux-cored welding wire is the stability of the filling ratio, while the manufacturing technology of the disc method is relatively complicated. As of now, it is impossible to guarantee the long-term and high-volume production requirements of this indicator

Second: the production efficiency is not high

Due to the complex production process and extremely low production efficiency, it cannot meet the requirements of normal production efficiency indicators at all. The production efficiency of the plate element method is lower than 5 times that of the steel strip method, and does not meet the most basic conditions for economical production scale.

Third: the overall cost is higher

At present, the mixed powder used in the production of flux cored wire consists of more than ten kinds of powder materials, including metal powder, alloy powder, mineral powder and chemical products. Small (less than 200 mesh), so the powder has a large specific surface area and is easy to absorb moisture

Second: Even if the specific surface area of ​​the powder is reduced, the powder will still absorb some water during the production process, which will affect the product quality of the flux cored wire

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