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Method for preparing CuW/low-carbon steel heterogeneous bimetallic material

A low-carbon steel and bimetallic technology, which is applied in the field of preparing CuW/low-carbon steel heterogeneous bimetallic materials, can solve the problems of reduced thermal conductivity of CuW, decreased mechanical properties of materials, unfavorable heat dissipation of CuW, etc., and achieves short sintering cycle and low cost The effect of low cost and good thermal conductivity

Active Publication Date: 2021-08-20
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in actual engineering, screws or rivets are generally used to connect CuW and steel support fixtures. Although this connection will obtain good bonding strength, it will reduce the thermal conductivity of CuW, which is not conducive to the heat dissipation of CuW. At the same time, this connection also has components. Bigger, takes up more space, etc.
In addition, there are domestic studies on brazing of tungsten and steel. The research shows that, without adding any activating elements, there is an obvious very thin layer of intermittent metal oxidation at the brazing interface of tungsten base material and steel. material, which reduces the mechanical properties of the overall material

Method used

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  • Method for preparing CuW/low-carbon steel heterogeneous bimetallic material
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  • Method for preparing CuW/low-carbon steel heterogeneous bimetallic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Step 1. Prepare Fe, Ni, Co, Cr, and Mn blocks into Fe, Ni, Co, Cr, and Mn powders with a purity of 99.9% by gas atomization. The particle diameters of Fe, Ni, Co, Cr, and Mn powders are uniform 10-500μm;

[0046] Step 2. Weigh the powder raw materials prepared in step 1 with an electronic balance with an accuracy of 0.001g according to the mole percentage of the following elements: Mn is 20%, Ni is 15%, Cr is 20%, Co is 20%, and the balance is Fe , the sum of the mole percentages of the above elements is 100%;

[0047] Step 3, mix the powder raw materials weighed in step 2, the ball-to-material ratio used in the powder mixing is 20:1, and the powder mixing time is 24 hours, then use a cold press to press into a high-entropy alloy compact, and press The pressure is 260Mpa; the pressing time is 30s;

[0048] Step 4. Pretreat the processed low-carbon steel and Cu / W alloy block materials, specifically, put the processed low-carbon steel and Cu / W alloy block materials in a b...

Embodiment 2

[0051] Step 1. Prepare Fe, Ni, Co, Cr, and Mn blocks into Fe, Ni, Co, Cr, and Mn powders with a purity of 99.9% by gas atomization. The particle diameters of Fe, Ni, Co, Cr, and Mn powders are uniform 10-500μm;

[0052] Step 2. Weigh the powder raw materials prepared in step 1 with an electronic balance with an accuracy of 0.001g according to the mole percentage of the following elements: Mn is 20%, Ni is 20%, Cr is 20%, Co is 20%, and the balance is Fe , the sum of the mole percentages of the above elements is 100%;

[0053] Step 3. Mix the powder raw materials weighed in step 2. The ball-to-material ratio used in the powder mixing is 1-40:1, and the mixing time is 24 hours. Then use a cold press to press into a high-entropy alloy compact, and press The pressure used is 260Mpa; the pressing time is 30s;

[0054] Step 4. Pretreat the processed low-carbon steel and Cu / W alloy block materials, specifically, put the processed low-carbon steel and Cu / W alloy block materials in a...

Embodiment 3

[0057] Step 1. Prepare Fe, Ni, Co, Cr, and Mn blocks into Fe, Ni, Co, Cr, and Mn powders with a purity of 99.9% by gas atomization. The particle diameters of Fe, Ni, Co, Cr, and Mn powders are uniform 10-500μm;

[0058] Step 2. Weigh the powder raw materials prepared in step 1 with an electronic balance with an accuracy of 0.001g according to the mole percentage of the following elements: Mn is 20%, Ni is 25%, Cr is 20%, Co is 20%, and the balance is Fe , the sum of the mole percentages of the above elements is 100%;

[0059] Step 3. Mix the powder raw materials weighed in step 2. The ball-to-material ratio used in the mixing is 40:1, and the mixing time is 24 hours. The pressure is 260Mpa; the pressing time is 30s;

[0060] Step 4. Pretreat the processed low-carbon steel and Cu / W alloy block materials, specifically, put the processed low-carbon steel and Cu / W alloy block materials in a beaker, pour alcohol into the beaker, Stop when the two block materials are completely s...

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Abstract

The invention discloses a method for preparing a CuW / low-carbon steel heterogeneous bimetallic material. The method specifically comprises the steps that firstly, Mn powder, Fe powder, Ni powder, Cr powder and Co powder are prepared by a gas atomization method, and then, all of the elements are accurately weighed according to the molar ratio and are mixed and pressed to obtain a cold-pressed blank; and the prepared raw materials are subjected to solid-phase sintering according to Cu / W, a high-entropy alloy cold-pressed blank and low-carbon steel to obtain the CuW / low-carbon steel heterogeneous bimetallic material. The prepared alloy has low cost and short sintering period, the process is simple and easy to implement, and generation of CuW and low-carbon steel interface intermetallic compounds is inhibited through the high-entropy effect of the high-entropy alloy, so that the CuW / low-carbon steel heterogeneous bimetallic material has good interface bonding strength and great development potential.

Description

technical field [0001] The invention belongs to the technical field of heterogeneous bimetal connections, and relates to a method for preparing CuW / low carbon steel heterogeneous bimetal materials. Background technique [0002] In high-voltage circuit breakers in high-voltage power grids, CuW alloys as functional parts are often connected with steel as structural parts to achieve the purpose of reducing costs. At present, in actual engineering, screws or rivets are generally used to connect CuW and steel support fixtures. Although this connection will obtain good bonding strength, it will reduce the thermal conductivity of CuW, which is not conducive to the heat dissipation of CuW. At the same time, this connection also has components. Larger, takes up more space and other issues. In addition, there are domestic studies on brazing of tungsten and steel. The research shows that, without adding any activating elements, there is an obvious very thin layer of intermittent metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C30/00B22F3/02B22F3/10B22F7/04B22F9/08
CPCC22C1/04C22C30/00B22F3/02B22F3/1007B22F7/04B22F9/082B22F2009/0824B22F2007/042
Inventor 杨晓红刘永定梁淑华邹军涛肖鹏
Owner XIAN UNIV OF TECH