Cross rolling method for tungsten-copper alloy foil

A tungsten-copper alloy and cross-rolling technology, which is applied in the field of pressure processing, can solve the problems of extended production cycle, increased energy consumption, cracked surface, etc., and achieve the effects of reduced annealing times, high production efficiency, and low equipment requirements

Inactive Publication Date: 2012-06-13
无锡乐普金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general deformation should not exceed 40% during the cold rolling process, otherwise cracks and surface cracks are prone to occur during the rolling process. Therefore, when producing thinner tungsten copper foils, due to the large cold rolling deformation, Need to undergo multiple annealing in the rolling process, prolonging the production cycle and increasing energy consumption
It is difficult to produce tungsten-copper alloy foil with a thickness of less than 0.8 mm by compression molding method and powder rolling method in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The 2 mm thick sintered slab of 80W-Cu composite material was subjected to multi-pass cold rolling, the reduction of each pass was 0.1-0.2 mm, and the roll speed was 5 r / s. When the deformation amount is about 40%, the slab is rolled transversely, the pass reduction is 0.08-0.12 mm, the roll speed is 5 r / s, and the rolling thickness is about 0.8 mm. Annealed under protective atmosphere. Finally, a 80W-Cu rolled foil with a thickness of 0.8 mm was obtained. The density test of the cross-rolled foil showed that the relative density reached 99.8%.

Embodiment 2

[0023] The 0.8 mm thick 85W-Cu composite sintered slab was subjected to multi-pass cold rolling, the reduction of each pass was 0.05-0.08 mm, and the roll speed was 15 r / s. When the deformation is about 40%, switch to cross rolling, the pass reduction is 0.03-0.05 mm, and the roll speed is 15 r / s. Rolled to a billet thickness of 0.3 mm. The rolled billets were annealed at 800 °C under a hydrogen protective atmosphere. Finally, a 85W-Cu rolled foil with a thickness of 0.3 mm was obtained. The density test of the cross-rolled foil showed that the relative density reached 99.7%.

Embodiment 3

[0025] The 0.8 mm thick 70W-Cu composite sintered slab was subjected to multi-pass cold rolling, the reduction of each pass was 0.04-0.08 mm, and the roll speed was 20 r / s. When the deformation is about 35%, switch to cross rolling, the pass reduction is 0.03-0.04 mm, and the roll speed is 20 r / s. Rolled to a billet thickness of 0.35 mm. The rolled billets were annealed at 800 °C under a hydrogen protective atmosphere. A rolled billet of 70W-Cu with a thickness of 0.35 mm was obtained. The annealed rolled billet is cross-rolled again, and the pass reduction is 0.02-0.03 mm. When the deformation is about 35%, the reverse rolling is carried out again, and the pass reduction is the same as above, until rolling to The thickness is 0.15 mm, and the 0.15 mm thick 70W-Cu cross-rolled billet was annealed at 750 °C under a hydrogen protective atmosphere. Finally, a 70W-Cu foil with a thickness of 0.15 mm was obtained, and the density test was carried out on the cross-rolled foil, an...

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Abstract

The invention discloses a cross rolling method for a tungsten-copper alloy foil. The method comprises the following steps of: performing multi-pass cold rolling on a tungsten-copper alloy sintering plate blank with the thickness of 0.8 to 3mm; when the rolling deformation amount is about 40 percent, performing 90-degree cross rolling, wherein the deformation amount is still controlled to be less than or equal to 40 percent; annealing the blank which is subjected to cross rolling at the temperature of between 700 and 900 DEG C; and performing cross rolling on the annealed blank continuously according to the thickness requirement of a product, wherein cross rolling is performed once every time before annealing. By the method, the problem that the surface is cracked in a one-way rolling process can be effectively solved, the annealing frequency is reduced, and the high-density tungsten-copper alloy foil with the thickness of 0.05 to 2mm can be prepared. The method has the advantages of low requirement on equipment, high production efficiency, low energy consumption and the like, is suitable for batch production, and tungsten-copper alloy of which the mass percentage of tungsten is 50 to 95 percent.

Description

technical field [0001] The invention relates to the technical field of pressure processing, in particular to a cross-rolling method for tungsten-copper alloy foil. Background technique [0002] Tungsten has the advantages of high melting point, high density, low expansion coefficient and high strength. Copper has good thermal conductivity and electrical conductivity. The tungsten-copper alloy made of tungsten and copper has the advantages of both tungsten and copper. Excellent thermal conductivity and electrical conductivity, small thermal expansion coefficient and other advantages, it is widely used in the fields of electrical contact materials, electrode materials, electronic packaging materials and heat sink materials. [0003] At present, the densification methods of tungsten-copper alloy mainly include infiltration method, hot isostatic pressing method, liquid phase sintering method and so on. Among them, the infiltration method is to pre-fire the tungsten skeleton fir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/28
Inventor 章晓波田强
Owner 无锡乐普金属科技有限公司
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