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Surfacing welding flux-cored wire

A technology of welding wire and flux, applied in the field of surfacing welding flux-cored welding wire, which can solve the problems of low hardness and poor wear resistance of weld metal

Active Publication Date: 2013-03-20
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The welding wire in the prior art still has disadvantages such as low weld metal hardness and poor wear resistance

Method used

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  • Surfacing welding flux-cored wire

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Experimental program
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Effect test

Embodiment 1

[0060] The steel sheath of the flux-cored wire is made of low-carbon steel strip, and its chemical composition is shown in Table 1.

[0061] Table 1 Chemical composition of steel strip (wt%)

[0062]

[0063] The chemical composition and raw material composition of the drug core powder are shown in Table 2, and the particle size is 40 mesh. Since there are many specifications of some raw materials, only one of them is selected here as a representative for illustration. FeSi45 is used for ferrosilicon, FeNb50 for ferroniobium, FeV50 for ferrovanadium, and yttrium oxide or cerium oxide for rare earth oxide.

[0064] Powder Composition Content (wt%) rutile 1.0~4.5 Feldspar 0.20~0.50 NaF and Fluorite 2.0~4.5 Magnesium powder 0.3~1.5 graphite 0.5~4.0 Ferrosilicon (FeSi45) 1.0~4.5 Medium carbon ferromanganese 6.0~10.0 High carbon ferrochrome 23.0~35.0 Tungsten carbide 40.0~60.0 Ferroniobium (FeNb50) 1.0~3....

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Abstract

The invention discloses a surfacing welding flux-cored wire. The surfacing welding flux-cored wire comprises carbon steel outer skin and medicinal powder which is filled in the carbon steel outer skin, wherein the medicinal powder comprises the following components in percentage by mass: 1.0%-4.5% of rutile, 0.20%-0.50% of feldspar, 2.0%-4.5% of one or two of NaF and fluorite, 1.0%-4.5% of silicon iron, 0.3%-1.5% of Mg, 6.0%-10.0% of mid-carbon ferromanganese, 23.0%-35.0% of high-carbon ferrochrome, 40.0%-60.0% of tungsten carbide, 0.5%-4.0% of graphite, 1.0%-3.5% of ferroniobium, 0%-1.5% of ferrovanadium and 0.5%-1.0% of rare earth oxide. The surfacing welding flux-cored wire disclosed by the invention is in spray transfer as the surfacing welding flux-cored wire is in fine molten drops during the welding, the splashing is small, a welding joint is essentially free from slag, continuous multi-pass welding can be carried out without removing the slag, and the surfacing welding flux-cored wire simultaneously has the characteristics that the gas protection welding and the self-protection welding are adopted.

Description

technical field [0001] The invention relates to the technical field of metal welding materials, in particular to a flux-cored welding wire for surfacing welding. Background technique [0002] Overlay welding is a process in which materials with certain properties are clad onto the surface of the substrate (weldment) by using a welding heat source to form a metallurgical bond. [0003] The purpose of surfacing welding is to modify the metal surface by means of welding to obtain the required wear-resistant, heat-resistant, corrosion-resistant and other special properties of the deposited layer, or to restore the size of the workpiece caused by wear or processing errors Insufficient, the application of these two aspects is called repair and strengthening in surface engineering. Overlay welding can not only repair the old metal parts, restore the parts or have a new shape, but also form a composite layer on the surface of the metal parts to obtain new, specific wear resistance,...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/368
Inventor 刘玉双张亚平韩海峰田海成李磊
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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