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Cross rolling method of molybdenum-copper alloy foil

A technology of molybdenum-copper alloy and cross-rolling, which is applied in the field of pressure processing, can solve the problems such as the inability to process foils, and achieve the effects of reducing the number of annealing times, low equipment requirements, and low energy consumption

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

The Chinese patent "Cold rolling method of molybdenum-copper alloy sheet---CN101862752A" discloses a cold-rolling method of molybdenum-copper alloy sheet. Since this method fails to solve the problem of cracking in the unidirectional rolling process, it can only be prepared Molybdenum-copper alloy sheets above 0.05 mm cannot be processed with foils thinner than 0.05 mm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The 4 mm thick 85Mo-Cu alloy sintered slab is subjected to multi-pass cold rolling, the pass reduction is 0.2-0.25 mm, and the roll speed is 5 r / s; when the thickness is about 1.6 mm (the deformation is about 60%), the slab was transversely rolled, the pass reduction was 0.06-0.12 mm, the speed was 8 r / s, and the thickness was rolled to 0.6 mm (the deformation was about 62.5%). Annealed under a hydrogen protective atmosphere. Cut the rolled sheet after annealing and continue cold rolling. The rolling direction is the same as the rolling direction before annealing. The deformation of each pass is 0.03-0.08mm, and the roll speed is 12 r / s. When the thickness is about 0.24mm ( The rolling deformation is about 60%), and the rolling is reversed again. The deformation of each pass is 0.002-0.01 mm, and the rolling mill speed is 12 r / s until the 85Mo-Cu foil with a thickness of 0.1 mm is rolled. The rolled foils were annealed at 800 °C under a hydrogen protective atmosphere. ...

Embodiment 2

[0021] The 2 mm thick 75Mo-Cu alloy sintered slab is subjected to multi-pass cold rolling, the pass reduction is 0.15-0.2 mm, and the roll speed is 8r / s; when the deformation is about 80%, the reverse cross rolling is carried out system, the pass reduction is 0.002-0.008 mm, and the roll speed is 12 r / s. Rolled to a thickness of 0.08 mm. The rolled foils were annealed at 750 °C under a hydrogen protective atmosphere. The density test of the cross-rolled foil after annealing has achieved a relative density of 99.9%.

Embodiment 3

[0023] The 1 mm thick 70Mo-Cu alloy sintered slab was subjected to multi-pass cold rolling, the reduction of each pass was 0.01-0.03mm, and the roll speed was 12 r / s. When the deformation is about 80%, it is cut along the length direction, and then reversed and cross-rolled. The pass reduction is 0.001-0.004 mm, and the roll speed is 15 r / s. Rolled to a thickness of 0.04 mm. The rolled foils were annealed at 700 °C under a hydrogen protective atmosphere. Density tests were performed on cross-rolled foils after annealing, and their relative densities reached 100%.

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Abstract

The invention discloses a cross rolling method of a molybdenum-copper alloy foil, cold rolling is performed on a molybdenum-copper alloy sintered plate billet in the thickness of 0.8-4mm multiple times, when the rolling deformation is 60-90%, 90-degree cross rolling is performed, the deformation is still controlled within 60-90%, and then annealing is performed on the cross-rolled foil, wherein the annealing temperature is 600-850 DEG C. The cross rolling can be continuously performed on the billet after annealing according to the requirement of the thickness of a product, and the cross rolling is performed once before every annealing. According to the cross rolling method disclosed by the invention, the surface cracking problem during the one-way rolling process can be effectively solved, the times of annealing can be reduced, and the high-density molybdenum-copper alloy foil in the thickness of 0.02-0.1mm can be prepared. The method has the advantages of low requirements on equipment, high production efficiency, low energy consumption and the like, and is suitable for mass production and rolling of the molybdenum-copper alloy foil.

Description

technical field [0001] The invention relates to the technical field of pressure processing, in particular to a method for cross-rolling molybdenum-copper alloy foils. Background technique [0002] Molybdenum-copper alloy is composed of body-centered cubic molybdenum and face-centered cubic copper, which is a two-phase mixed structure that neither solid solution nor intermetallic compounds are formed, and is called "pseudo-alloy". The alloy not only has the high strength and low expansion coefficient of molybdenum, but also combines the high electrical conductivity and high thermal conductivity of copper. Therefore, molybdenum copper alloy is widely used as electronic packaging materials and heat sink materials. [0003] Since it is difficult to obtain high-density molybdenum-copper alloy by conventional sintering process, it is necessary to deform the sintered billet. Rolling is an effective deformation method to improve the density and performance of molybdenum-copper alloy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/40
Inventor 章晓波田强
Owner 无锡乐普金属科技有限公司
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