High-hardness self-protection overlaying flux-cored wire and preparation method thereof

A protection stack, high hardness technology, applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of difficult development of self-protected flux-cored welding wire, limited flux core space, etc., to avoid defects such as pores and improve hardness. , the effect of reducing manufacturing costs

Inactive Publication Date: 2017-08-18
ANHUI HUAZHONG WELDING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that the development of self-shielding flux-cored welding wire is more difficult, and more slagging and gas-generating agents are often required to achieve self-shielding effect, which makes the flux core space limited

Method used

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  • High-hardness self-protection overlaying flux-cored wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The drug core is prepared according to the following quality: 80g of high-carbon ferrochrome, 9.5g of silicon-manganese alloy, 1g of aluminum-magnesium alloy, 2g of graphite, 0.5g of boron nitride, 5g of rutile and 2g of fluorite. All the powders taken passed through an 80-mesh sieve. Put the various powders taken into the powder mixer, mix for 40 minutes, then add the mixed powder into the U-shaped 16×0.3mm H08A carbon steel belt groove, and the filling rate is 55%. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through one or more of the wire drawing dies with diameters of 4.10mm, 3.80mm, 3.45mm, 3.15mm, 2.85mm, 2.60mm, and 2.40mm, draw and reduce the diameter one by one, and finally obtain a diameter of 2.40~4.10mm welding wire products. The welding current is 280-400A, the welding voltage is 28-36V, and the welding speed is 2.4m / min. The hardness and wear resistance of surfacing metal are shown in Table 1.

Embodiment 2

[0028] The drug core is prepared according to the following quality: 76g of high-carbon ferrochromium, 8g of silicon-manganese alloy, 2g of aluminum-magnesium alloy, 0.8g of graphite, 1.2g of boron nitride, 6g of rutile and 6g of fluorite. All the powders taken passed through an 80-mesh sieve. Put the various powders taken into the powder mixer, mix for 40 minutes, then add the mixed powder into the U-shaped 16×0.3mm H08A carbon steel belt groove, and the filling rate is 50%. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through one or more of the wire drawing dies with diameters of 4.10mm, 3.80mm, 3.45mm, 3.15mm, 2.85mm, 2.60mm, and 2.40mm, draw and reduce the diameter one by one, and finally obtain a diameter of 2.40~4.10mm welding wire products. The welding current is 280-400A, the welding voltage is 28-36V, and the welding speed is 2.4m / min. The hardness and wear resistance of surfacing metal are shown in Table 1.

Embodiment 3

[0030] The drug core is prepared according to the following quality: 70g of high-carbon ferrochrome, 10g of silicon-manganese alloy, 1g of aluminum-magnesium alloy, 3.6g of graphite, 1.2g of boron nitride, 10g of rutile and 4.2g of fluorite. All the powders taken passed through an 80-mesh sieve. Put the various powders taken into the powder mixer, mix for 40 minutes, then add the mixed powder into the U-shaped 16×0.3mm H08A carbon steel belt groove, and the filling rate is 45%. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through one or more of the wire drawing dies with diameters of 4.10mm, 3.80mm, 3.45mm, 3.15mm, 2.85mm, 2.60mm, and 2.40mm, draw and reduce the diameter one by one, and finally obtain a diameter of 2.40~4.10mm welding wire products. The welding current is 280-400A, the welding voltage is 28-36V, and the welding speed is 2.4m / min. The hardness and wear resistance of surfacing metal are shown in Table 1.

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Abstract

The invention provides a high-hardness self-protection overlaying flux-cored wire and a preparation method of the high-hardness self-protection overlaying flux-cored wire. The high-hardness self-protection overlaying flux-cored wire comprises a low-carbon steel band and a flux core. The steel band is filled with the flux core. The flux core comprises, by mass, 70%-80% of high-carbon ferrochromium, 6%-10% of silicon-manganese alloy, 1%-2% of aluminum-magnesium alloy, 0.8%-3.6% of graphite, 0.5%-2% of boron nitride, 5%-13% of rutile and 2%-6% of fluorite. The flux core accounts for 45%-55% of the total weight of the flux-cored wire. The preparation method of the high-hardness self-protection overlaying flux-cored wire comprises the steps that (1) the low-carbon steel band is rolled into a U shape through a forming roller, and the flux core materials accounting for 45%-55% of the total weight of the flux-cored wire are added to a U-shaped groove; (2) the U-shaped groove is closed, the flux core is wrapped inside the U-shaped groove, a wire-drawing die is used for drawing and reducing pass by pass, finally the diameter of the flux-cored wire reaches 2.40-4.10 mm, and the finished product is obtained. The self-protection overlaying flux-cored wire has quite high hardness and quite high wear-proof performance.

Description

technical field [0001] The invention belongs to the technical field of metal welding materials, and in particular relates to a high-hardness self-shielding surfacing welding flux-cored wire and a preparation method thereof. Background technique [0002] There are high-hardness carbides inside the high-chromium cast iron structure, which provides excellent wear resistance and low cost, so it is widely used in mines and machinery. It is widely used in fields such as cement and metallurgy. Specifically, the structure of high chromium cast iron is divided into three types: hypoeutectic, eutectic and hypereutectic. Among them, the hypereutectic structure contains a large number of isolated primary carbides with high hardness, and the resistance to low stress wear is more prominent. Traditional high chromium cast iron is generally manufactured by casting method, but only hypoeutectic or eutectic structure with carbon content and relatively low chromium content can be obtained by...

Claims

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Application Information

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IPC IPC(8): B23K35/36B23K35/40
CPCB23K35/3601B23K35/406
Inventor 曹立兵
Owner ANHUI HUAZHONG WELDING MATERIAL CO LTD
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