Preparation method for W-Cu composite materials of fiber and particle hybrid structure

A composite material and particle technology, applied in the field of preparation of fiber and particle hybrid structure copper-tungsten composite material, can solve the problems of aggravating ablation and wear, difficult to achieve continuous skeleton structure, insufficient strength of tungsten skeleton, etc., and achieve high temperature strength. improved effect

Active Publication Date: 2015-11-11
XIAN UNIV OF TECH
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is limited space for synergistically improving the high-temperature strength and arc ablation resistance of contact materials in traditional processes, such as strengthening the sintering of the tungsten skeleton, adding a third component, etc. Although it can improve the arc ablation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for W-Cu composite materials of fiber and particle hybrid structure
  • Preparation method for W-Cu composite materials of fiber and particle hybrid structure
  • Preparation method for W-Cu composite materials of fiber and particle hybrid structure

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] Step 1. Prepare the green composite material:

[0037] Weigh 70% of W powder and 30% of Cu powder according to mass percentages, and the total mass percentage of the above components is 100%. Put W powder and Cu powder at a ball-to-battery ratio of 0.5:1 in a drum mixer at 400r / min Mix at speed for 6h;

[0038] The mixed composite powder is sieved to remove impurities, and then layered with the acid-washed tungsten fiber mesh in a cold press mold. The tungsten fiber mesh is separated by 2mm after pressing, and it is pre-pressed at 200 MPa, and the pressure is maintained for 90 seconds. A green composite material is formed.

[0039] The tungsten fiber mesh is woven from tungsten fibers with a wire diameter of 60μm, and its specification is 100 mesh; the tungsten fiber mesh is pickled with HF before layering and spreading to remove the oxide film on its surface.

[0040] Step 2. Hot pressing:

[0041] The green body obtained in step 1 is installed in a pressuriz...

Example Embodiment

[0044] Example 2

[0045] Step 1. Prepare the green composite material:

[0046] Weigh 90% of W powder and 10% of Cu powder according to mass percentages, and the sum of the above components is 100%. Put W powder and Cu powder at a ball-to-battery ratio of 0.7:1 in a drum mixer at 400r / min Mix at speed for 7h;

[0047] The mixed composite powder is sieved to remove impurities and then layered with the acid-washed tungsten fiber mesh in a cold press mold. The tungsten fiber mesh is spaced 3mm apart after pressing, and it is pre-pressed at 400 MPa, and the pressure is maintained. After 30s, a composite green body is formed.

[0048] The tungsten fiber mesh is woven from tungsten fibers with a wire diameter of 40μm, and its specification is 30 mesh; the tungsten fiber mesh is pickled with HF before layering and spreading to remove the oxide film on its surface.

[0049] Step 2. Hot pressing:

[0050] The green body obtained in step 1 is installed in a pressurable mold, and hydrogen gas is...

Example Embodiment

[0053] Example 3

[0054] Step 1. Prepare the green composite material:

[0055] Weigh 85% of W powder and 15% of Cu powder according to mass percentages. The sum of the above components is 100%. Put W powder and Cu powder at a ball-to-material ratio of 1:1 in a drum mixer at 400r / min Mix at speed for 8h;

[0056] The mixed composite powder is sieved to remove impurities, and then layered with the acid-washed tungsten fiber mesh in a cold press mold. The tungsten fiber mesh is spaced 1mm apart after pressing, and it is pre-pressed with a pre-pressure of 340 MPa to ensure After 60 seconds of pressing, a green composite material is formed.

[0057] The tungsten fiber mesh is woven from tungsten fibers with a wire diameter of 40μm, and its specification is 30 mesh; the tungsten fiber mesh is pickled with HF before layering and spreading to remove the oxide film on its surface.

[0058] Step 2. Hot pressing:

[0059] The green body obtained in step 1 is installed in a pressurizable mold, a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Wire diameteraaaaaaaaaa
Wire diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides a preparation method for W-Cu composite materials of a fiber and particle hyrid structure. Particularly, W powder and Cu powder hyrid evenly and a W fiber net obtained after acid pickling are laid in a cold pressing mold in a layered mode and then subjected to pre-pressing and pressure maintenance to obtain a composite material green body; then the green body is put in to a mold capable of being pressurized and subjected to hot pressing in an atmosphere protection hot pressing furnace; and finally, the composite material green body obtained after hot pressing is subjected to copper cementation in a high-temperature atmosphere sintering furnace, so that the W-Cu composite materials of the fiber and particle hyrid structure are obtained. The two-dimensional W fiber net is added in the preparation process of a W-Cu pseudo alloy W framework. The two-dimensional W fiber net and the W-Cu pseudo alloy W framework form metallurgical bonding through processing of an interface of fibers and the W framework and reasonable technological parameters, the W fiber net has a function like reinforcing ribs for the W framework, and therefore the high-temperature strength of the composite materials is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and relates to a preparation method of copper-tungsten composite material with fiber and particle hybrid structure. Background technique [0002] In order to meet the requirements of the continuous development of the power market, my country's high-voltage switchgear is developing in the direction of high voltage, large capacity and miniaturization. The capacity of new circuit breakers will continue to increase, while the space of the arc extinguishing chamber will continue to shrink, so that the load borne by the unit area of ​​the arcing contacts will continue to increase; at the same time, in order to reduce maintenance costs, the life of the contacts is required However, it is getting longer and longer, so it is hoped that the contact material not only has excellent arc ablation resistance, but also has excellent high temperature strength. There is very limited space f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C47/14C22C47/20C22C49/10C22C111/02
Inventor 梁淑华李阳张乔李向阳李玉春邹军涛卓龙超
Owner XIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap