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Multi-element transition metal carbide hybrid reinforced copper-based surfacing layer and preparation method thereof

A transition metal and carbide technology is used in the preparation of copper-based surfacing layers, and in the field of copper-based surfacing layers reinforced by multiple transition metal carbides. The performance of composite materials is degraded, and it is difficult to meet service requirements, etc., to achieve the effect of reducing adverse effects, convenient composition adjustment, and low cost

Active Publication Date: 2022-04-26
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in industrial practice, the performance of common copper alloys such as silicon bronze and tin bronze is gradually difficult to meet the service requirements, and it is necessary to develop copper-based alloy materials with better wear resistance
At the same time, during the surfacing manufacturing process of copper-steel dissimilar metals, the copper in the molten state at high temperature is easy to infiltrate into the steel along the austenite grain boundary of the steel, thereby producing penetration cracks, which will greatly reduce the interface of copper-steel dissimilar metals. Bond strength, resulting in a decrease in the properties of copper-steel composites

Method used

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  • Multi-element transition metal carbide hybrid reinforced copper-based surfacing layer and preparation method thereof
  • Multi-element transition metal carbide hybrid reinforced copper-based surfacing layer and preparation method thereof
  • Multi-element transition metal carbide hybrid reinforced copper-based surfacing layer and preparation method thereof

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preparation example Construction

[0045] The present invention also provides a method for preparing a copper-based surfacing layer strengthened by the hybridization of multivariate transition metal carbides. The specific steps are as follows:

[0046] Step 1: Preparation of flux-cored welding wire for the working layer: Weigh the powder according to mass percentage: C powder 2.5%-6.1%, Nb powder 19.3%, W powder 38.2%, Si powder 1%, Mn powder 1%, and the balance is Cu Powder, the sum of the mass percentages of the above components is 100%; the pure copper strip with a size of 7mm×0.2mm is cleaned with alcohol and placed on a wire drawing machine, and a U-shaped groove is pre-pressed with a mold, and the above powder is mixed evenly and filled in In the U-shaped groove of the copper strip, after closing and reducing the diameter, it is finally made into a flux-cored wire with a diameter of 1.6mm;

[0047] In step 1, by adjusting the C content, the carbide content generated in situ in the working layer can be cha...

Embodiment 1

[0060] Step 1: Prepare flux-cored welding wire for the working layer: Weigh the powder according to mass percentage, C powder 2.5%, Nb powder 19.3%, W powder 38.2%, Si powder 1%, Mn powder 1%, and the balance is Cu powder, the above The sum of the mass percentages of the components is 100%; the pure copper strip with a size of 7mm×0.2mm is cleaned with alcohol and placed on the wire drawing machine, and the U-shaped groove is pre-pressed with a mold, and the above powder is mixed evenly and filled into the copper strip U In the groove, the filling rate is controlled at 35wt.% to 40wt.%. After closing and reducing the diameter, a flux-cored welding wire with a diameter of 1.6mm is finally produced.

[0061] Step 2: Prepare transition layer flux-cored welding wire: Weigh the powder according to mass percentage, Ni powder 35%, Nb powder 5%, W powder 5%, Si powder 1%, Mn powder 1%, and the balance is Cu powder, the above The sum of the mass percentages of the components is 100%; t...

Embodiment 2

[0067] Step 1: Prepare flux-cored welding wire for the working layer: weigh the powder according to mass percentage, C powder 3.7%, Nb powder 19.3%, W powder 38.2%, Si powder 1%, Mn powder 1%, and the balance is Cu powder, the above The sum of the mass percentages of the components is 100%; the pure copper strip with a size of 7mm×0.2mm is cleaned with alcohol and placed on the wire drawing machine, and the U-shaped groove is pre-pressed with a mold, and the above powder is mixed evenly and filled into the copper strip U In the groove, the filling rate is controlled at 35wt.% to 40wt.%. After closing and reducing the diameter, a flux-cored welding wire with a diameter of 1.6mm is finally produced.

[0068] Step 2: Prepare transition layer flux-cored welding wire: Weigh the powder according to mass percentage, Ni powder 35%, Nb powder 5%, W powder 5%, Si powder 1%, Mn powder 1%, and the balance is Cu powder, the above The sum of the mass percentages of the components is 100%; t...

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Abstract

The invention discloses a multi-element transition metal carbide hybrid reinforced copper-based surfacing layer. The multi-element transition metal carbide hybrid reinforced copper-based surfacing layer comprises a Cu-Ni-W-Nb transition layer and 2-3 WC + NbC hybrid reinforced copper-based working layers which are arranged in sequence, a raw material used by the Cu-Ni-W-Nb transition layer is a transition layer flux-cored wire; and a raw material used by the WC + NbC hybrid reinforced copper-based working layer is a working layer flux-cored wire. Wherein the WC + NbC reinforcement phase in the working layer is generated by in-situ reaction of alloy elements. According to the surfacing layer, the surface hardness can be improved while good interface bonding is guaranteed, and the wear resistance is enhanced. The invention further discloses a preparation method of the multi-element transition metal carbide hybrid reinforced copper-based surfacing layer.

Description

technical field [0001] The invention belongs to the technical field of metal material surface overlay welding, and in particular relates to a copper-based overlay layer strengthened by multivariate transition metal carbides, and also relates to a preparation method of the copper-based overlay layer strengthened by multivariate transition metal carbides . Background technique [0002] With the continuous development of industrial technology, composite materials are gradually replacing single materials, and are more and more widely used in industrial products. For example, in parts such as self-lubricating bearings and worm gears, surfacing welding is often used to prepare copper-steel composite structures, in which steel with good mechanical properties is mostly used as a matrix to bear the main load during the operation of the parts; while copper alloys It has good thermal conductivity, anti-friction, wear resistance and corrosion resistance, etc. It is often used as a comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/30B23K35/40B23K9/173B23K9/095
CPCB23K35/0266B23K35/302B23K35/40B23K9/173B23K9/095
Inventor 李继红雷龙宇杜明科张志强高俊
Owner XIAN UNIV OF TECH
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