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Slag-free surfacing welding rod

A surfacing welding electrode and welding core technology, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor electrical conductivity of the coating, low deposition rate, easy red tail, etc., to achieve small spatter, Reasonable crack distribution and simple processing technology

Active Publication Date: 2012-04-18
中机焊业科技(福建)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low deposition rate, difficult arc starting, and easy red tail are common problems of currently used surfacing electrodes. The occurrence of the above problems is mainly due to the poor conductivity of the coating in the electrode during welding.

Method used

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  • Slag-free surfacing welding rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In terms of mass percentage, 15% of the powder raw material is chromium carbide, 61% of high-carbon ferrochrome, 5% of manganese metal, 3% of 45 # Ferrosilicon, 2% fluorite, 5% graphite, 3% boron carbide, 2% quartz sand, 1% barium carbonate, 1% nickel powder, 0.5% ferromolybdenum, 0.5% ferroniobium and 1% ferro-tungsten is mixed in the powder mixing equipment for 1 hour to obtain a powdery coating, wherein the content of C in the high-carbon ferrochrome is 7.5-8.5%, and the content of Cr is 60-65%. The content of Si is ≤3%, and the balance is Fe; the particle size of all the above-mentioned powders is -40 mesh.

[0021] Slowly add the potassium-sodium water glass whose weight is 5% of the weight of the drug skin powder into the prepared drug skin powder and stir evenly; adopt the H08A welding core, and the diameter of the welding core is 4.0mm; to add the modulus The mass ratio of the coating to the welding core after 45 potassium-sodium water glass is 2:1, and the coa...

Embodiment 2

[0023] In terms of mass percentage, the powder raw material is 5.5% of carbide metal chromium, 60% of high-carbon ferrochromium, 2% of metal manganese, 6% of 45 # Ferrosilicon, 3% fluorite, 4% graphite, 1% boron carbide, 0.5% quartz sand, 2% nickel powder, 6% ferromolybdenum, 6% ferroniobium and 4% ferrotungsten Mix in the powder mixing equipment for 1 hour to obtain a powdery coating, wherein the content of C in the high-carbon ferrochrome is 7.5-8.5%, the content of Cr is 60-65%, and the content of Si is ≤3 %, the balance is Fe; the particle size of all the above-mentioned powders is -40 mesh.

[0024] Slowly add the potassium-sodium water glass whose weight is that the modulus of 5% of the drug skin powder weight is 45 in the prepared drug skin powder, stir; adopt H08A welding core, welding core diameter 4.0mm; The mass ratio of the coating to the welding core is 2:1, and the coating is uniformly and centripetally pressed on the welding core to prepare a surfacing electrod...

Embodiment 3

[0026] In terms of mass percentage, the powder raw material is 5% of carbide metal chromium, 80% of high-carbon ferrochromium, 8% of metal manganese, 2% of 45 # Ferrosilicon, 1% fluorite, 2% graphite and 2% barium carbonate were mixed in the powder mixing equipment for 1 hour to obtain the powdered coating, wherein the C in the high-carbon ferrochrome The content of Cr is 7.5-8.5%, the content of Cr is 60-65%, the content of Si is ≤3%, and the balance is Fe; the particle size of all the above-mentioned powders is -40 mesh.

[0027] Slowly add the potassium-sodium water glass whose weight is that the modulus of 5% of the drug skin powder weight is 45 in the prepared drug skin powder, stir; adopt H08A welding core, welding core diameter 4.0mm; The mass ratio of the coating to the welding core is 2:1, and the coating is uniformly and centripetally pressed on the welding core to prepare a surfacing electrode. The surfacing layer (three layers) of the electrode adopts HRA-50 Rockw...

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Abstract

The invention relates to a slag-free surfacing welding rod, which comprises a welding core (using an H08A welding core) and a coating. Powdered raw materials, including carbonized chromium, high carbon ferrochrome, manganese, No. 45 ferrosilicon, fluorspar, graphite, boron carbide, quartz, nickel powder, barium carbonate, molybdenum iron, niobium iron and tungsten iron are mixed to obtain the coating; potassium-sodium water glass with the weight being 5 percent of the weight of the coating powder and the modulus being 45 is slowly added into the prepared coating powder and then mixed; the coating is uniformly and concentrically extruded on the H08A welding core with the diameter being 4.0mm to obtain the surfacing welding rod according to a mass ratio of the coating which is added with the water glass: the welding core being 2:1. . When the slag-free surfacing welding rod with high wear resistance is applied in surfacing, continuous surfacing can be realized with no need to knock off slag, the deposition efficiency is high, arcs can be easily formed, no red tails can be formed in the continuous surfacing, and the hardness of deposited metal can reach above HRc65. The slag-free surfacing welding rod can be applied in composite manufacturing and repair of various products subject to intermediate and low stress and serious abrasive wear.

Description

technical field [0001] The invention belongs to the field of surfacing welding repair materials for mechanical parts, and relates to a slag-free surfacing welding electrode. Background technique [0002] At present, there are a large number of parts that are easy to wear and corrode in the large-scale and modern equipment introduced in our country. In order to ensure the integrity and high utilization rate of the whole set of equipment, when manufacturing and repairing these parts, it is necessary to coat the surface of these parts with a The layer is more wear-resistant, corrosion-resistant, and has high-efficiency and material-saving coating materials; and for some on-site repairs and small-area, special-shaped workpieces, surfacing electrodes still have an irreplaceable role. However, low deposition rate, difficult arc starting and easy red tail are common problems of the currently used surfacing electrodes. The main reason for the above-mentioned problems is that the coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/362B23K35/40
Inventor 杜荣臻韩雪飞张剑邢愚李小平
Owner 中机焊业科技(福建)有限公司
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