Metal powder flux-cored wire suitable for medium and thick plate beveling-free high-speed welding

Abstract

The invention provides a metal powder flux-cored wire suitable for medium and thick plate beveling-free high-speed welding. The metal powder flux-cored wire comprises sheet steel and a flux core wrapped by the sheet steel. The flux core is prepared from components in percent by mass including 5%-8% of silicon-manganese alloy, 2%-4% of manganite, 3%-5% of silicon iron, 1%-2% of powdered aluminium,1%-2% of graphite and the balance iron powder. According to the metal powder flux-cored wire, as the formula of the flux core is designed, a welding joint of the wire has good depth of fusion, the wire is suitable for medium and thick plate beveling-free high-speed welding, the welding speed can reach 450 mm / min-600 mm / min, and the welding working efficiency is effectively improved. The metal powder flux-cored wire has excellent welding process performance, and according to the overall performance of fused metal and a welded joint, the yield strength is larger than or equal to 390 MPa, the tensile strength is larger than or equal to 490 MPa, the elongation is larger than or equal to 22%, and the Akv under the -30 DEG C condition is larger than or equal to 47 J.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a metal powder flux-cored welding wire suitable for high-speed welding of medium and thick plates without groove opening. Background technique [0002] Metal powder flux cored wire has the characteristics of small spatter and fast melting of flux cored wire, and also has the characteristics of high deposition efficiency of solid wire and high current welding. Metal powder flux-cored welding wire is composed of powder and steel skin, the steel skin is inside the powder powder, and the powder is mainly composed of a variety of alloy powders, etc. These alloy powders are the main factors that determine the mechanical properties of the flux-cored wire and are also the welding wire. The core technology of manufacturing. In the butt welding of medium and thick plates, in order to ensure penetration, the beveling multi-layer and multi-pass welding process is usual...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the existing butt welding of medium and thick plates adopts the multi-layer and multi-pass welding process of bevelling, which consumes more cost and time, and increases the welding workload.

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