CN102489504A - Cross rolling method for tungsten-copper alloy foil - Google Patents
Cross rolling method for tungsten-copper alloy foil Download PDFInfo
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- CN102489504A CN102489504A CN2011104005284A CN201110400528A CN102489504A CN 102489504 A CN102489504 A CN 102489504A CN 2011104005284 A CN2011104005284 A CN 2011104005284A CN 201110400528 A CN201110400528 A CN 201110400528A CN 102489504 A CN102489504 A CN 102489504A
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- tungsten
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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
The present invention relates to the pressure processing technology field, especially the tandem rolling method of tungsten-copper alloy paillon foil.
Background technology
Tungsten has advantages such as high-melting-point, high density, low-expansion coefficient and high strength; Copper has good heat conduction, electric conductivity; The tungsten-copper alloy that tungsten and copper are composited then has both the advantage of tungsten and copper; Have high density, good thermal conductivity and electric conductivity, less advantages such as thermal coefficient of expansion, in field extensive uses such as contact material, electrode material, electronic package material and heat sink materials.
At present, the densifying method of tungsten-copper alloy mainly contains infiltration method, hot isostatic pressing method, lqiuid phase sintering method etc.Wherein, Infiltration method is first pre-burning W skeleton, and the W skeleton with copper and pre-burning stacks together then, in reduction or vacuum atmosphere, carries out liquid-phase sintering; Copper through fusion infiltrates in the W skeleton under capillary force action, and this method can obtain the tungsten-copper alloy of higher-density.Yet infiltration method is to rely on the capillarity of W skeleton that copper is infiltrated, and inevitable some closed pores that exist are prone to cause the thick and skewness of copper solidifying phase in the W skeleton, and in addition, layer of copper is left on the sintered blank surface, needs polishing to go, and wastes raw material.And the high temperature insostatic pressing (HIP) rule is higher to equipment requirements, and is difficult to realize the production of bulk paillon foil.Traditional lqiuid phase sintering method can not be through the fine and close tungsten-copper alloy of liquid-phase sintering preparation, although some following process can improve the relative density of tungsten-copper alloy like multiple pressure, forge hot, hot pressing etc., these technologies have increased the mould loss.
Rolling is a kind of a kind of effective ways that improve the tungsten-copper alloy performance, especially is fit to the product of sheet, and prior art generally adopts hot rolling technology to produce the sheet material of thickness greater than 2 mm, adopts the paillon foil below cold rolling production 2 mm.Chinese patent " cold rolling process of tungsten-copper alloy sheet---CN101862751A " discloses and has adopted unidirectional cold-rolling practice to be processed into tungsten-copper alloy sheet through multi-pass.But; General deflection should not surpass 40% in cold-rolled process, otherwise in the operation of rolling, occurs cracking and surface checking easily, therefore when producing the tungsten copper paillon foil of thinner thickness; Because cold rolling reduction is bigger; Need prolonged the production cycle through repeatedly annealing in the operation of rolling, energy consumption increases.The compression molding method of prior art and powder roll the method for forming and all are difficult to produce the tungsten-copper alloy paillon foil of thickness less than 0.8 mm.
Summary of the invention
The applicant is difficult to produce the shortcomings such as tungsten-copper alloy paillon foil of thickness less than 0.8 mm to above-mentioned prior art; A kind of tandem rolling method of tungsten-copper alloy paillon foil is provided, thereby had both reduced the annealing number of times, shortened the production cycle; Reduce energy consumption, improved the tissue of material again.
The technical scheme that the present invention adopted is following:
A kind of tandem rolling method of tungsten-copper alloy paillon foil, it is cold rolling that tungsten-copper alloy sintering blank is at room temperature carried out multi-pass, comprises following steps:
(I) blank is carried out the rolling of a direction earlier;
(II) when the rolling deflection of step I reaches 30～40%, change the rolling direction of tungsten-copper alloy, be about to the blank half-twist, form with step I in the direction of quadrature mutually, be rolled;
(III) when the rolling deflection of Step II reaches 30～40%, blank is annealed;
(IV) repeating step I to III is until being rolling to the thickness that needs.
It is further characterized in that: said tungsten-copper alloy sintering sotck thinkness is 0.8～3 mm, and said tungsten-copper alloy foil thickness is 0.05～2 mm.
The mass percent of tungsten is 50～95% in the said tungsten-copper alloy.
Roll rotational speed is 1～20 r/s when rolling, and reduction in pass is at 0.005～0.3 mm, and along with the reducing of sotck thinkness, reduction in pass is corresponding to be reduced.
Annealing is carried out in 700～900 ℃ hydrogen or vacuum drying oven.
Beneficial effect of the present invention is following:
The tandem rolling method of tungsten-copper alloy paillon foil provided by the invention can effectively solve the surface checking problem that occurs in the unidirection rolling process, has reduced the annealing number of times, and can prepare thickness is the thick high-compactness tungsten-copper alloy paillon foil of 0.05～2 mm.That this method has is low for equipment requirements, production efficiency is high, low power consumption and other advantages, is suitable for producing in enormous quantities, and the mass fraction that is applicable to tungsten is the rolling of all tungsten-copper alloy paillon foils of 50～95%.
The specific embodiment
The present invention is cold rolling through to thickness being that the tungsten-copper alloy sintered blank of 0.8～3 mm is at room temperature carried out multi-pass, and roll rotational speed is 1～20 r/s; Reduction in pass is between 0.005～0.3 mm, and along with reducing of sotck thinkness, reduction in pass is corresponding to be reduced.
In general, when total deformation surpasses 40%, if continue rolling, copper mutually with tungsten mutually owing to segregation phenomenon appears in single load bearing, cause material to ftracture and surface checking, conventional method then is the annealed be full of cracks of eliminating.The present invention is the rolling direction of 30～40% o'clock change tungsten-copper alloys in total deformation then, is about to the blank commentaries on classics and carries out cross rolling for 90 °, promptly carries out quadrature with rolling direction before and intersects.So not only make the copper in the material change distribution mutually with tungsten mutually, the process-cycle that also having reduced once anneals brings prolongs and energy consumption increases.When the rolling total deformation in switching-over back is 30～40%, in 700～900 ℃ hydrogen or vacuum drying oven, anneal.Continue then blank is rolled, what annealing back rolling direction and annealing were preceding can be identical, also can intersect.When deflection is 30～40%, tandem rolling again, annealing then is so repeatedly to obtaining the required thickness of product.During this time, along with the increase of deflection, the length and width size of rolled blank all increasing, can suitably be reduced, so that follow-up rolling processing according to circumstances.
Embodiment 1
The 80W-Cu composite sintering slab that 2 mm are thick carries out that multi-pass is cold rolling, and its reduction in pass is 0.1～0.2 mm, and roll rotational speed is 5 r/s.When deflection is about 40%, slab is carried out cross rolling, reduction in pass is 0.08～0.12 mm, roll rotational speed is 5 r/s, is rolled down to thickness and is about 0.8 mm, under 800 ℃ hydrogen shield atmosphere, anneals.Final acquisition thickness is the rolling paillon foil of the 80W-Cu of 0.8 mm, and the tandem rolling paillon foil is carried out density measurement, and its relative density reaches 99.8%.
Embodiment 2
It is cold rolling that the thick 85W-Cu composite of 0.8 mm sintering slab is carried out multi-pass, and its reduction in pass is 0.05～0.08 mm, and roll rotational speed is 15 r/s.About 40% the time when deflection, tandem rolling is carried out in switching-over, and reduction in pass is 0.03～0.05 mm, and roll rotational speed is 15 r/s.Being rolled down to sotck thinkness is 0.3 mm.Rolling blank is annealed under the hydrogen shield atmosphere at 800 ℃.Final acquisition thickness is the rolling paillon foil of the 85W-Cu of 0.3 mm, and the tandem rolling paillon foil is carried out density measurement, and its relative density reaches 99.7%.
Embodiment 3
It is cold rolling that the thick 70W-Cu composite of 0.8 mm sintering slab is carried out multi-pass, and its reduction in pass is 0.04～0.08 mm, and roll rotational speed is 20 r/s.About 35% the time when deflection, tandem rolling is carried out in switching-over, and reduction in pass is 0.03～0.04 mm, and roll rotational speed is 20 r/s.Being rolled down to sotck thinkness is 0.35 mm.Rolling blank is annealed under 800 ℃ hydrogen shield atmosphere.Obtaining thickness is the rolling blank of the 70W-Cu of 0.35 mm.Rolling blank to annealing carries out tandem rolling once more; Reduction in pass is 0.02～0.03 mm; When deflection was about 35%, it was rolling to commutate once more, and reduction in pass is the same; Until being rolled down to thickness is 0.15 mm, and the 70W-Cu tandem rolling blank that 0.15 mm is thick is annealed under 750 ℃ hydrogen shield atmosphere.Final acquisition thickness is the 70W-Cu paillon foil of 0.15 mm, and the tandem rolling paillon foil is carried out density measurement, and its relative density reaches 99.8%.
Embodiment 4
The thick 70W-Cu paillon foil of 0.15 mm after the annealing of embodiment 3 is proceeded tandem rolling, and pass deformation is 0.008～0.01 mm, and roll rotational speed is 20 r/s.When deflection was about 30%, it was rolling to commutate once more, and pass deformation is reduced to 0.005～0.007 mm, and rotating speed is constant, and 0.07 mm is thick until being rolled down to.Rolling paillon foil is annealed under 700 ℃ hydrogen shield atmosphere.Final acquisition thickness is the 70W-Cu paillon foil of 0.07 mm, and the tandem rolling paillon foil is carried out density measurement, and its relative density reaches 100%.
More than describing is to explanation of the present invention, is not that institute of the present invention restricted portion is referring to claim to the qualification of invention, and under the situation of spirit of the present invention, the present invention can do any type of modification.
Claims (5)
1. the tandem rolling method of a tungsten-copper alloy paillon foil, it is cold rolling that tungsten-copper alloy sintering blank is at room temperature carried out multi-pass, it is characterized in that comprising following steps:
(I) blank is carried out the rolling of a direction earlier;
(II) when the rolling deflection of step I reaches 30～40%, change the rolling direction of tungsten-copper alloy, be about to the blank half-twist, form with step I in the direction of quadrature mutually, be rolled;
(III) when the rolling deflection of Step II reaches 30～40%, blank is annealed;
(IV) repeating step I to III is until being rolling to the thickness that needs.
2. according to the tandem rolling method of the described tungsten-copper alloy paillon foil of claim 1, it is characterized in that: said tungsten-copper alloy sintering sotck thinkness is 0.8～3 mm, and said tungsten-copper alloy foil thickness is 0.05～2 mm.
3. according to the tandem rolling method of the described tungsten-copper alloy paillon foil of claim 1, it is characterized in that: the mass percent of tungsten is 50～95% in the said tungsten-copper alloy.
4. according to the tandem rolling method of the described tungsten-copper alloy paillon foil of claim 1, it is characterized in that: roll rotational speed is 1～20 r/s when rolling, and reduction in pass is at 0.005～0.3 mm, and along with the reducing of sotck thinkness, reduction in pass is corresponding to be reduced.
5. according to the tandem rolling method of the described tungsten-copper alloy paillon foil of claim 1, it is characterized in that: annealing is carried out in 700～900 ℃ hydrogen or vacuum drying oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011104005284A CN102489504A (en) | 2011-12-06 | 2011-12-06 | Cross rolling method for tungsten-copper alloy foil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104005284A CN102489504A (en) | 2011-12-06 | 2011-12-06 | Cross rolling method for tungsten-copper alloy foil |
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| CN102489504A true CN102489504A (en) | 2012-06-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806229A (en) * | 2012-08-09 | 2012-12-05 | 上海瑞钼特金属新材料有限公司 | Low-temperature rolling method for preparing tungsten copper alloy foil |
| CN103298321A (en) * | 2013-06-24 | 2013-09-11 | 江西量一光电科技有限公司 | Tungsten-copper alloy and graphite composite cooling fin and production method thereof |
| CN104923561A (en) * | 2014-03-20 | 2015-09-23 | 六晶金属科技（苏州）有限公司 | Rolling method for metal substrate for LED |
| CN109226324A (en) * | 2018-11-22 | 2019-01-18 | 江苏苏鑫管夹制造有限公司 | A kind of tungsten alloy plate and its preparation process |
Citations (7)
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| GB243112A (en) * | 1924-09-13 | 1925-11-26 | William Wilkinson | Improvements in ornamental sheet metal and in the manufacture of same |
| JPS63303042A (en) * | 1987-06-03 | 1988-12-09 | Tokyo Tungsten Co Ltd | High-workability tungsten metal sheet and its production |
| RU2038191C1 (en) * | 1993-06-25 | 1995-06-27 | Козлова Раиса Федоровна | Method for production of material with regulated thermal expansion |
| CN1664136A (en) * | 2004-03-04 | 2005-09-07 | 东北大学 | Expansion coefficient controllable copper base alloy with high conductivity and method for preparation thereof |
| CN1850373A (en) * | 2006-04-29 | 2006-10-25 | 东北大学 | Method for rolling variable-width steel plate |
| CN101569892A (en) * | 2009-05-21 | 2009-11-04 | 上海交通大学 | Method for rolling AZ31 magnesium alloy through asynchronous longitudinal and transverse crossing |
| CN101862751A (en) * | 2010-05-18 | 2010-10-20 | 上海六晶金属科技有限公司 | Cold rolling method for tungsten-copper alloy sheet |
-
2011
- 2011-12-06 CN CN2011104005284A patent/CN102489504A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB243112A (en) * | 1924-09-13 | 1925-11-26 | William Wilkinson | Improvements in ornamental sheet metal and in the manufacture of same |
| JPS63303042A (en) * | 1987-06-03 | 1988-12-09 | Tokyo Tungsten Co Ltd | High-workability tungsten metal sheet and its production |
| RU2038191C1 (en) * | 1993-06-25 | 1995-06-27 | Козлова Раиса Федоровна | Method for production of material with regulated thermal expansion |
| CN1664136A (en) * | 2004-03-04 | 2005-09-07 | 东北大学 | Expansion coefficient controllable copper base alloy with high conductivity and method for preparation thereof |
| CN1850373A (en) * | 2006-04-29 | 2006-10-25 | 东北大学 | Method for rolling variable-width steel plate |
| CN101569892A (en) * | 2009-05-21 | 2009-11-04 | 上海交通大学 | Method for rolling AZ31 magnesium alloy through asynchronous longitudinal and transverse crossing |
| CN101862751A (en) * | 2010-05-18 | 2010-10-20 | 上海六晶金属科技有限公司 | Cold rolling method for tungsten-copper alloy sheet |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806229A (en) * | 2012-08-09 | 2012-12-05 | 上海瑞钼特金属新材料有限公司 | Low-temperature rolling method for preparing tungsten copper alloy foil |
| CN102806229B (en) * | 2012-08-09 | 2015-09-09 | 上海瑞钼特金属新材料有限公司 | A kind of zerolling method preparing tungsten copper alloy foil |
| CN103298321A (en) * | 2013-06-24 | 2013-09-11 | 江西量一光电科技有限公司 | Tungsten-copper alloy and graphite composite cooling fin and production method thereof |
| CN104923561A (en) * | 2014-03-20 | 2015-09-23 | 六晶金属科技（苏州）有限公司 | Rolling method for metal substrate for LED |
| CN109226324A (en) * | 2018-11-22 | 2019-01-18 | 江苏苏鑫管夹制造有限公司 | A kind of tungsten alloy plate and its preparation process |
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Application publication date: 20120613 |