Method for preparing molybdenum-copper alloy blanks through continuous sintering

A molybdenum-copper alloy and billet technology, which is applied in the field of continuous sintering to prepare molybdenum-copper alloy billets, can solve problems such as shortening the production process, and achieve the effects of shortening the production process, improving production efficiency, and saving energy

Active Publication Date: 2015-01-28
XIAN REFRA TUNGSTEN & MOLYBDENUM
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  • Abstract
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Problems solved by technology

This method makes full use of the principle of dimensional shrinkage of molybdenum compacts during high-temperature sintering, and cleverly designs the internal structure and size of the sintered crucible cavity according to the dimensional change of molybdenum compacts, so that the molybdenum compacts slide smoothly to the melting point after high-temperature pre-sintering. In the molten copper, the furnace temperature is controlled to a temperature range suitable for infiltration, which realizes the continuous process of high-temperature pre-sintering and infiltration, shortens the production process, saves energy, improves production efficiency, and solves the problem of low copper Content molybdenum-copper alloy blank The technical problem that high temperature Mo skeleton sintering and low temperature Cu infiltration sintering cannot be completed in the same sintering process in the traditional infiltration sintering process

Method used

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  • Method for preparing molybdenum-copper alloy blanks through continuous sintering

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Step 1, such as figure 1 As shown, a 1.66kg copper block 4 is placed in the lower cavity 3 in the sintered crucible cavity; the sintered crucible cavity includes the upper cavity 1 and the lower cavity 3, and connects the upper cavity 1 and the lower cavity 3 middle cavity 2;

[0023] In this embodiment, the longitudinal section of the middle cavity 2 is an inverted trapezoid, and the inverted trapezoid has a base angle of 15° ° isosceles trapezoid;

[0024] In this embodiment, the cross section of the lower cavity 3 is a circle of Φ83.3 mm;

[0025] Step 2, placing 4 kg of molybdenum compact 5 with a relative density of 50% in the middle cavity 2 of the sintered crucible mold cavity described in step 1;

[0026] In this embodiment, the cross section of the molybdenum compact 5 is a circle of Φ100 mm;

[0027] Step 3. Place the sintered crucible with the copper block 4 and the molybdenum compact 5 vertically in the induction sintering furnace, raise the temperature ...

Embodiment 2

[0030] Step 1, such as figure 1 As shown, a 1.43kg copper block 4 is placed in the lower cavity 3 in the sintered crucible cavity; the sintered crucible cavity includes the upper cavity 1 and the lower cavity 3, and connects the upper cavity 1 and the lower cavity 3 middle cavity 2;

[0031] In this embodiment, the longitudinal section of the middle cavity 2 is an inverted trapezoid, and the inverted trapezoid is an isosceles trapezoid with a base angle of 45°;

[0032] In this embodiment, the cross section of the lower cavity 3 is a square with a length of 130 mm;

[0033] Step 2, placing 6 kg of molybdenum compact 5 with a maximum size of 150mm and a relative density of 60% in the middle cavity 2 of the sintered crucible mold cavity described in step 1;

[0034] In the present embodiment, the cross section of the molybdenum compact 5 is a square with a length of 150 mm;

[0035] Step 3: Place the sintered crucible with the copper block 4 and the molybdenum compact 5 verti...

Embodiment 3

[0038] Step 1, such as figure 1 As shown, a 0.61kg copper block 4 is placed in the lower cavity 3 in the sintered crucible cavity; the sintered crucible cavity includes the upper cavity 1 and the lower cavity 3, and connects the upper cavity 1 and the lower cavity 3 middle cavity 2;

[0039] In this embodiment, the longitudinal section of the middle cavity 2 is an inverted trapezoid, and the inverted trapezoid is an isosceles trapezoid with a base angle of 75°;

[0040] In this embodiment, the cross section of the lower cavity 3 is a circle with a diameter of Φ187 mm;

[0041] Step 2, placing 8 kg of molybdenum compact 5 with a maximum size of 200mm and a relative density of 75% in the middle cavity 2 of the sintered crucible mold cavity described in step 1;

[0042] In this embodiment, the cross section of the molybdenum compact 5 is a circle of Φ200 mm;

[0043] Step 3: Place the sintered crucible with the copper block 4 and the molybdenum compact 5 vertically in the indu...

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Abstract

The invention discloses a method for preparing molybdenum-copper alloy blanks through continuous sintering. The method includes the steps of firstly, placing copper blocks in the lower-section cavity of a sintering crucible die cavity; secondly, placing molybdenum compression blanks in the middle-section cavity of the sintering crucible die cavity; thirdly, vertically placing the sintering crucible with the copper blocks and the molybdenum compression blanks into a sintering furnace for sintering, naturally cooling, and removing copper covering the surfaces after discharging to obtain the molybdenum-copper alloy blanks. The method has the advantages that the principle that the molybdenum compression blanks shrink during high-temperature sintering is fully utilized, the internal structure and size of the sintering crucible die cavity are ingeniously designed according to the size variation quantity of the molybdenum compression blanks, the molybdenum compression blanks after the high-temperature sintering can smoothly slide into molten copper, then furnace temperature is controlled to be in a range suitable for infiltration, continuity of the high-temperature pre-sintering and the infiltration is achieved, production flow is shortened, energy is saved, and production efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of molybdenum-copper alloy blank preparation, and in particular relates to a method for preparing molybdenum-copper alloy blank by continuous sintering. Background technique [0002] Molybdenum-copper alloy is a pseudo-alloy composed of molybdenum and copper, which are mutually insoluble metals. Therefore, it has both the excellent properties of metal Mo and Cu, and has the advantages of high temperature resistance, ablation resistance, high thermal conductivity and low thermal expansion coefficient, and is widely used in electrical contacts, electrode materials, electronic packaging, thermal deposition, etc. Materials and nozzles for rockets, and components for aircraft linings. Especially compared with tungsten copper materials with similar functions and properties, it has the advantage of low density, so it meets the requirements of special fields such as aerospace. [0003] Due to the large difference ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/10C22C1/00
Inventor 淡新国张腾李长亮任吉文姬毓林三元
Owner XIAN REFRA TUNGSTEN & MOLYBDENUM
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