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Cu based-flux-cored wire and method thereof for low-carbon surface modification

A technology of flux-cored welding wire and surface modification, applied in welding medium, welding equipment, welding equipment, etc., to achieve the effect of refining grain size, high forming efficiency, and eliminating residual stress

Active Publication Date: 2020-08-21
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Another object of the present invention is to provide a method for surface modification of low-carbon steel using Cu-based-flux-cored welding wire. This method solves the problem of surface modification of low-carbon steel. Based on arc cladding technology, it can quickly produce Obtain a surface modified cladding layer, so that the steel parts meet the service conditions in specific fields

Method used

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  • Cu based-flux-cored wire and method thereof for low-carbon surface modification
  • Cu based-flux-cored wire and method thereof for low-carbon surface modification

Examples

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Effect test

Embodiment 1

[0055] Step 1: First, according to Ni powder: 35%, Sn powder: 15%, Zn powder: 2%, Pb powder: 15%, Ag powder: 6%, Si powder: 4%, Cu powder: 23%, weigh the mass The percentages sum to 100% metal powder. Put the weighed metal powder into an automatic powder mixer and mix it. After mixing, place it in a vacuum ring furnace and heat it to 200°C to keep it warm. Then put the pure copper strip on the wire drawing machine, fill the mixed metal powder into the copper strip, go through the drawing process, and finally reduce the diameter to 1.2mm for use; the filling rate of the flux core powder in the flux cored wire is 22wt%.

[0056] Step 2: Mechanically clean the surface of the low-carbon steel substrate, and place it in an ultrasonic vibrator filled with absolute ethanol for cleaning. Cleaning time: 20 minutes, dry it, and put it in a box furnace for preheating. Preheating temperature: 300 ℃;

[0057] Step 3: Wipe the developed flux-cored wire with absolute ethanol, and put it in...

Embodiment 2

[0063] Step 1: First, according to Ni powder: 30%, Sn powder: 13%, Zn powder: 2%, Pb powder: 13%, Ag powder: 4%, Si powder: 3%, Cu powder: 35%, weigh the mass The percentages sum to 100% metal powder. Put the weighed metal powder into an automatic powder mixer and mix it. After mixing, place it in a vacuum ring furnace and heat it to 200°C to keep it warm. Then the pure copper strip is placed on the wire drawing machine, the mixed metal powder is filled into the copper strip, and after the drawing process, the diameter is finally reduced to 1.2mm for use; the filling rate of the flux core powder in the flux cored wire is 25wt%;

[0064] Step 2: Mechanically clean the surface of the low-carbon steel substrate, and place it in an ultrasonic vibrator filled with absolute ethanol for cleaning. Cleaning time: 22 minutes, dry it, and put it in a box furnace for preheating. Preheating temperature: 320 ℃;

[0065] Step 3: Wipe the developed flux-cored wire with absolute ethanol, and...

Embodiment 3

[0071] Step 1: First, according to Ni powder: 28%, Sn powder: 12%, Zn powder: 2%, Pb powder: 12%, Ag powder: 5%, Si powder: 3%, Cu powder: 38%, weigh the mass The percentages sum to 100% metal powder. Put the weighed metal powder into an automatic powder mixer and mix it. After mixing, place it in a vacuum ring furnace and heat it to 200°C to keep it warm. Then the pure copper strip is placed on the wire drawing machine, the mixed metal powder is filled into the copper strip, and after the drawing process, the diameter is finally reduced to 1.2mm for use; the filling rate of the flux core powder in the flux cored wire is 23wt%;

[0072] Step 2: Mechanically clean the surface of the low-carbon steel substrate, and place it in an ultrasonic vibrator filled with absolute ethanol for cleaning. Cleaning time: 24 minutes, dry it, and put it in a box furnace for preheating. Preheating temperature: 350 ℃;

[0073] Step 3: Wipe the developed flux-cored wire with absolute ethanol, and...

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Abstract

The invention discloses a Cu based-flux-cored wire. The Cu based-flux-cored wire comprises a flux core and a welding scale, wherein the flux core is prepared from the following components in percentage by mass: 20%-35% of Ni powder, 10%-15% of Sn powder, 1%-2% of Zn powder, 8%-15% of Pb powder, 2%-6% of Ag powder, 1%-4% of Si powder, the balance of Cu, and the sum of the mass percentage of the components is 100%. The abrasive resistance, corrosion resistance and electrical conductivity and thermal conductivity of the surface of low-carbon steel can be improved, and the performance of multi-functionalization of low-carbon steel parts is sufficiently developed. The invention further provides a method for low-carbon surface modification by adopting the Cu based-flux-cored wire. The problem ofthe low-carbon surface modification is solved, the corrosion resistance, the abrasive resistance, the electrical conductivity and the thermal conductivity of the surface of the low-carbon steel can be improved, and thus the steel parts meet the service condition in specific fields.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to a Cu-based-flux-cored welding wire, and also relates to a method for modifying the surface of low-carbon steel by using the welding wire. Background technique [0002] With the advancement of science and technology, a single material can no longer meet the application of engineering. In order to maximize the performance of metal materials, materials with different properties are often combined, and then specific technical means are used to prepare composite metal materials. For large ships on the ocean, due to long-term corrosion in seawater, seawater corrosion is prone to occur in the steel matrix of the shell, resulting in cracking and scrapping of the bottom plate of the ship, which seriously reduces the service time of the ship. Therefore, in order to improve the corrosion resistance of the steel substrate surface, a layer of copper alloy is often ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40B23K9/173B23K9/235B23K9/04
CPCB23K9/042B23K9/173B23K9/235B23K35/0266B23K35/302B23K35/3033B23K35/406
Inventor 张敏张云龙杜明科董玉凡仝雄伟郭宇飞
Owner XIAN UNIV OF TECH
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