Method for preparing copper base electrode powder deformation compound material

A composite electrode and powder technology, which is applied in the field of composite material preparation, can solve the problems of low material density, poor two-phase combination, and difficulty in engineering application due to large deformation requirements.

Inactive Publication Date: 2005-12-28
HARBIN INST OF TECH
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Problems solved by technology

[0003] The invention provides a preparation method of W-Cu or Cu-Cr powder deformation composite electrode material, which solves the problems of low material density and poor combination of two phases existing in the traditional sintering infiltration technology; it also solves the current deformation composite electrode material. The large deformation requirement in material preparation is difficult to apply in engineering

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  • Method for preparing copper base electrode powder deformation compound material
  • Method for preparing copper base electrode powder deformation compound material

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specific Embodiment approach 1

[0005] Specific implementation mode 1: In this implementation mode, elemental Cu and Cr powders are used as raw materials, and the ratio thereof is Cu85Wt%; Cr15Wt%. The specific steps are as follows:

[0006] 1. Cu and Cr elemental powders are plastically deformed by high-energy mechanical ball milling at 400rpm for 3 hours to obtain Cu / Cr lamellar composite powders, and the lamellar size is below 3 μm. In the self-made MJ-1 type agitating high-energy ball mill, GCrl5 steel balls of 6 mm are used, the ball-to-material ratio is 8:1, the rotation speed is 400 rpm, the amount of balls (ball volume / barrel volume) is 0.2, and vacuum hydrogen is used for protection. cool down. The ball milling time is 3 hours.

[0007] 2. The Cu / Cr composite powder is cold-pressed at 900 MPa to obtain a billet with a relative density of about 85%, and vacuum sintered at 900-950°C for 1 hour to obtain a sintered billet with a relative density of about 97%.

[0008] 3. The sintered billet is prehe...

specific Embodiment approach 2

[0011] Embodiment 2: In this embodiment, simple W and Cu powder are used as raw materials, and the ratio thereof is W60Wt%; Cu40Wt%. The specific steps are as follows:

[0012] 1. W / Cu composite powder is obtained by plastic deformation of W and Cu elemental powder at 400 rpm for 60 hours with high-energy mechanical ball milling, and the particle size is below 4 μm. Then in the self-made MJ-1 type agitation type high-energy ball mill ball mill, adopt GCrl5 steel ball 6mm, ball material ratio 2: 1, rotating speed 400rpm, ball capacity (ball volume / barrel volume) 0.2, adopt vacuum to fill argon gas protection, Circulating water cooling. The ball milling time is 60 hours.

[0013] 2. The W / Cu composite powder is cold-pressed at 900 MPa to obtain a billet with a relative density of about 85%, and vacuum sintered at 900°C to 1000°C for 4 hours to obtain a sintered billet with a relative density of about 97%.

[0014] 3. The sintered billet is preheated at 700°C to 950°C for 15 m...

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Abstract

The invention relates to a preparation method of a W-Cu or Cu-Cr powder deformation composite electrode material, which relates to a preparation method of a composite material. It uses Cu and Cr or W and Cu elemental powder as raw materials. The first step is mechanical ball milling; the second step is cold pressing; the third step is vacuum solid-phase sintering; the fourth step is hot hydrostatic extrusion. A mixture of graphite and glass is used as the lubricant, and the volume ratio of graphite powder and glass powder is 8:1.5-2.5. When extruding, the lubricant is made into a lubricating medium sleeve. The inner cavity of the lubricating medium sleeve is the same size and shape as the sintered billet. The sintered billet is placed in the lubricating medium sleeve, and the lubricating medium sleeve and the sintered billet are pressurized with a pressure head. The applied pressure increases from 0 to 1000-1200MPa, and then stabilizes to 500MPa. The total extrusion time is 3-5 seconds. It solves the problems of low material density and poor combination of two phases existing in the traditional sintering infiltration technology; it also solves the current large deformation requirements in the preparation of deformation composite materials, which is difficult to apply in engineering.

Description

Technical field: [0001] The invention relates to a preparation method of a composite material, in particular to a preparation method of a W-Cu or Cu-Cr powder deformation composite material. Background technique: [0002] With the rapid development of various industries in our country, various new electrical appliances are constantly being developed, promoted and applied, and various electrical processing technologies are increasingly widely used, all of which put forward higher requirements for electrical materials. High-performance electrode materials (mainly tungsten-copper and copper-chromium materials) not only have excellent electrical conductivity, but also have high strength and superior high-temperature performance. Various contacts, electrodes, etc., are widely used in machinery, electronics, aerospace and other fields. At present, W-Cu or Cu-Cr materials are considered as new functional materials with great development potential and application prospects, and hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16C22C1/04C22C9/00
Inventor 王尔德胡连喜于洋孙宏飞刘祖岩
Owner HARBIN INST OF TECH
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