High-efficient energy-saving and surfacing layer well-forming self-shielded flux-cored welding wire and manufacture method thereof

Abstract

The invention discloses a high-efficient energy-saving and surfacing layer well-forming self-shielded flux-cored welding wire. A low-carbon steel belt is an outer skin; and a flux core comprises the following components in percentage by mass: 42-60% of high carbon ferro-chrome with the particle size of 80 meshes, 10-18% of ferrosilicon, 16-25% of ferroboron, 2-8% of rare earth silicon, 2-8% of graphene, 1-4% of aluminum magnesium alloy, 2-5% of manganese powder and the balance of iron powder, wherein the graphene, the aluminum magnesium alloy and the manganese powder are added with two kinds of particle sizes of 60 meshes and 200 meshes, and the weight of the flux core powder accounts for 49-53% of the total weight of the welding wire. According to the welding wire provided by the invention, by adding the flux core components with different particle sizes, good welding technological performance is ensured; and by adding B, Si and other self-fluxing alloy elements simultaneously in the flux core, the fusing point of the welding wire is effectively lowered; a welding process window is expanded; the surfacing efficiency is improved; a high-efficient and energy-saving effect is realized; and the surface tension of a surfacing welding bead is effectively lowered, and the forming of the surfacing welding bead is effectively improved.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a self-shielding flux-cored welding wire with high efficiency and energy saving and good surfacing layer formation and a preparation method thereof. Background technique [0002] As a green manufacturing process, surfacing welding is widely used in the repair or remanufacture of various wear-resistant parts. The wear resistance of the surfacing alloy depends largely on the amount of alloy powder added, that is, the proportion of alloy powder in the flux core. In order to increase the filling amount of alloy powder in the flux-cored wire, the research group has developed a series of slag-free self-shielded surfacing flux-cored wire in recent years. The flux core of this new type of wire hardly adds any mineral powder, making the alloy The filling amount is increased to the greatest extent, and the filling factor of the flux-cored wire is incre...

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Problems solved by technology

[0003] However, due to the excessive amount of alloy in the flux core, the surface tension of the surfacing alloy is often too large, the fluidity is poor, and the height of the weld bead is narrow, which affects the welding process performance of the surfacing alloy and limits the slag-free self-shielding surfacing flux. Application breadth of cored wire

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