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Ni based-flux-cored wire and method for preparing copper-steel base gradient composite

A technology of flux-cored welding wire and composite material, applied in welding/cutting medium/material, welding equipment, welding equipment, etc., can solve the problem that parts are prone to generate welding thermal stress, cannot obtain fusion welding joints, and have relatively different thermal physical parameters. It can improve the utilization rate of materials, facilitate the operation, and optimize the production process.

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

However, the thermal physical parameters between copper and steel are quite different, such as the difference in linear expansion coefficient, which makes the parts prone to welding thermal stress; to a welded joint with better fusion

Method used

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  • Ni based-flux-cored wire and method for preparing copper-steel base gradient composite
  • Ni based-flux-cored wire and method for preparing copper-steel base gradient composite
  • Ni based-flux-cored wire and method for preparing copper-steel base gradient composite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Step 1: Firstly, according to Ni powder 86%, Mn powder 5%, Si powder 7%, Cu powder 2%, weigh the metal powder whose mass percentage sum is 100%. 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 place 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%;

[0049] Step 2: Surface-treat the low-carbon steel welding wire, transition layer Ni-based-flux-cored welding wire and pure copper welding wire, that is, wipe it with anhydrous ethanol cloth, and put it into a vacuum tube furnace for drying. The drying temperature is: 40°C;

[0050] Step 3: Mechanically clean the surface of the carbon steel plate with a size of 200mm×50mm×5mm, and then put it into an ultras...

Embodiment 2

[0054] Step 1: Firstly, according to Ni powder 87%, Mn powder 4%, Si powder 6%, Cu powder 3%, weigh the metal powder whose mass percentage sum is 100%. 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%;

[0055] Step 2: Surface-treat the low-carbon steel welding wire, transition layer Ni-based-flux-cored welding wire and pure copper welding wire, that is, wipe it with anhydrous ethanol cloth, and put it into a vacuum tube furnace for drying. The drying temperature is: 42°C;

[0056] Step 3: Mechanically clean the surface of the carbon steel plate with a size of 200mm×50mm×5mm, and then put it into a...

Embodiment 3

[0060] Step 1: Firstly, according to Ni powder 88%, Mn powder 4%, Si powder 6%, Cu powder 2%, weigh the metal powder whose mass percentage sum is 100%. 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%;

[0061] Step 2: Surface-treat the low-carbon steel welding wire, transition layer Ni-based-flux-cored welding wire and pure copper welding wire, that is, wipe it with anhydrous ethanol cloth, and put it into a vacuum tube furnace for drying. The drying temperature is: 50°C;

[0062] Step 3: Mechanically clean the surface of the carbon steel plate with a size of 200mm×50mm×5mm, and then put it into a...

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Abstract

The invention discloses a Ni based-flux-cored wire. The Ni 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: 86%-90% of Ni powder, 3%-5% of Mn powder, 6%-7% of Si powder, the balance of Cu powder, and the sum of the mass percentage of the components is 100%. The Ni based-flux-cored wire is used asa transition layer to avoid welding defects caused by thermophysical parameter difference of two types of materials during direction connection of copper-steel. The invention further provides a method for preparing copper-steel base gradient composite based on the Ni based-flux-cored wire used as the transition layer. The problem of the welding defects caused by direct connection in existing copper / steel composite is solved, parts can be combined from the steel side to the copper side to reach a gradient mode, so that the combining capacity of a heterogeneous material interface is enhanced, and the mechanical properties of composite members are improved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing of metal materials, specifically relates to a Ni-based-flux-cored welding wire, and also relates to a method for preparing a copper-steel-based gradient composite material based on the Ni-based-flux-cored welding wire as a transition layer. Background technique [0002] Due to the shortage of copper resources in my country, the price of copper and its alloys has increased year by year, and the strength of copper is low and easy to deform, which seriously restricts its long-term development. The annual output of steel in our country is increasing year by year, the price is low and it has high strength and processability, which is suitable for parts materials under various working conditions. It is a good choice to use copper-steel bimetallic composite materials instead of a single pure copper or copper alloy. This can not only save a lot of precious metal copper, reduce the manufact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K9/04B23K9/173B23K9/235
CPCB23K9/044B23K9/173B23K9/235B23K35/0266B23K35/3033
Inventor 张敏张云龙杜明科许帅董玉凡王刚
Owner XIAN UNIV OF TECH
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