CN105057682A - Preparation method of tungsten-copper-tin alloy powder - Google Patents
Preparation method of tungsten-copper-tin alloy powder Download PDFInfo
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Abstract
The invention discloses a preparation method of tungsten-copper-tin alloy powder. The preparation method comprises the steps that atomized copper powder and crystalline tungsten powder are taken as the raw materials; tin power is added to the atomized copper powder and the crystalline tungsten powder; the mixed powder is placed in a steel band reduction furnace, and is subjected to high temperature diffusion treatment in a shielding gas or reducing gas atmosphere; and through the diffusion of the tin power in the atomized copper powder and the crystalline tungsten powder, alloy connection between the atomized copper powder and the crystalline tungsten powder is realized; and through breaking and screening of a crusher, the tungsten-copper-tin alloy powder is obtained. The tungsten-copper-tin alloy powder prepared by preparation method is uniform in component, high in density, excellent in flowing property and easy to form; the problem that the possibility of segregation in the traditional preparation method is high is solved; and the preparation method is simple in preparation technology and easy to operate.
Description
Technical field
The present invention relates to field of metal alloy technology, particularly relate to a kind of preparation method of tungsten copper ashbury metal powder.
Background technology
Tungsten-copper alloy powder, owing to having the high heat conduction of the high-melting-point of tungsten, high strength, low linear expansion coefficient and copper, high connductivity, high moulding premium properties concurrently, is widely used as punching bullet shaped charge material, tungsten copper electric contact material.In the process of carrying out processing, because the comparison in difference that metallic copper gold and tungsten exist is large, therefore we can not adopt the mode of founding to carry out processing, but adopt the technology of powder metallurgy to produce, one of traditional tungsten-copper alloy powder, preparation method thereof is infiltration method, it is the effect utilizing capillary force, molten metal lower for fusing point is soaked the porous basic framework of filling certain density and intensity, molten metal to flow filling porous matrix porosity along particulate interspaces, thus obtain finer and close material, generally comprise powder process-batching mixing-compressing-sintering and infiltration-cold worked production procedure.
Tungsten after compressing or copper, to sinter in 1300 ~ 1500 DEG C of liquid phases, but in preparation process, liquid phase copper infiltrates by the capillarity of W skeleton hole, and densification rate is slow, densification degree is low, copper solidifying phase is thick and distribution is not too even, and high temperature sintering can make tungsten particle agglomeration, forms thick heterogeneous structure, liquid phase copper overflows and makes composition generation segregation, and under high temperature, size distortion is serious.If the uniformity of material is bad, density between them will be allowed lower than 97%, and easily produce segregation phenomena, the production and processing quality that tungsten-copper alloy is last can be had influence on like this.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of preparation method of tungsten copper ashbury metal powder, tungsten copper ashbury metal meal component prepared by the method is even, density is high, mobile performance is excellent, be easy to shaping, solves the problem of easy segregation in traditional preparation methods.
For reaching this object, the present invention by the following technical solutions:
A preparation method for tungsten copper ashbury metal powder, comprises the following steps:
1) by weight percentage, take the Production of Crystalline W Powder of 40 ~ 80%, the atomized copper powder of 10 ~ 60% and 2 ~ 4% glass putty;
2) Production of Crystalline W Powder, atomized copper powder, glass putty are added in two-dimentional batch mixer be mixed to get tungsten copper tin composite powder;
3) by tungsten copper tin composite powder take out be placed in steel belt reduction furnace protection gas or reducing atmosphere under carry out High temperature diffusion;
4), after the tungsten copper tin composite powder after High temperature diffusion being taken out, carry out crushing and screening by disintegrating machine, obtain tungsten copper ashbury metal powder.
Atomized copper powder, is processed further by cathode copper, and in dendritic, the irregular dress of shallow rare mangrove, spherical, the spherical powder of class, oxidizable in humid air, can be dissolved in hot sulfuric acid or nitric acid, the antioxygenic property of atomized copper powder is excellent.Atomized copper powder is granular, and particulate interspaces is little, and between particle, relative sliding hinders little, and therefore apparent density is large.
Production of Crystalline W Powder belongs to a kind of specification the thickest in tungsten powder.Be mainly used in surface spraying, petroleum perforation, hard material, high-temperaure coating, combustion chamber spraying high temperature coating and other wear-resisting, high temperature resistant component coating, the spraying of intermediate frequency furnace tungsten pincers pot.Production of Crystalline W Powder is bright grey powder, has that purity is high, coarse size, a good fluidity and containing features such as oxygen are minimum.
The present invention selects atomized copper powder and Production of Crystalline W Powder to be raw material, and advantage is:
Atomized copper powder, is processed further by cathode copper, dendritic, irregular in shallow rare mangrove, class is spherical, spherical powder, oxidizable in humid air, can be dissolved in hot sulfuric acid or nitric acid, and the antioxygenic property of atomized copper powder is excellent.Atomized copper powder is granular, and particulate interspaces is little, and between particle, relative sliding hinders little, and therefore apparent density is large.
Production of Crystalline W Powder belongs to a kind of specification the thickest in tungsten powder.Be mainly used in surface spraying, petroleum perforation, hard material, high-temperaure coating, combustion chamber spraying high temperature coating and other wear-resisting, high temperature resistant component coating, the spraying of intermediate frequency furnace tungsten pincers pot.Production of Crystalline W Powder is bright grey powder, has that purity is high, coarse size, a good fluidity and containing features such as oxygen are minimum.
Glass putty is added in atomized copper powder and Production of Crystalline W Powder; be placed in steel belt reduction furnace; High temperature diffusion process is carried out under protection gas or reducing atmosphere; make atomized copper powder and Production of Crystalline W Powder realize alloy by glass putty in atomized copper powder and the diffusion in Production of Crystalline W Powder to be connected, and the density of the tungsten copper ashbury metal made is very high.
Wherein, the order number of described Production of Crystalline W Powder is-325 orders, such as 325 ~ 600 orders, and the order number of described glass putty is-500 orders, such as 500 ~ 700 orders, and the order number of described atomized copper powder is-320 orders, such as 320 ~ 500 orders.
Wherein, the purity of described Production of Crystalline W Powder, described glass putty and described atomized copper powder is greater than 99.5%.
Wherein, described step 2) in two-dimentional batch mixer be Double cone mixer.
Wherein, described step 2) in incorporation time be 20 ~ 40min.
Wherein, described step 3) in steel belt reduction furnace be HYL-375-7Q steel belt type reducing furnace.
Wherein, described step 3) in the temperature of High temperature diffusion be 750 ~ 950 DEG C.
Wherein, described step 3) in time of High temperature diffusion be 3 ~ 5h.
Compared with prior art; beneficial effect of the present invention is: the present invention selects atomized copper powder and Production of Crystalline W Powder to be raw material; glass putty is added in atomized copper powder and Production of Crystalline W Powder; be placed in steel belt reduction furnace; High temperature diffusion process is carried out under protection gas or reducing atmosphere; make atomized copper powder and Production of Crystalline W Powder realize alloy by glass putty in atomized copper powder and the diffusion in Production of Crystalline W Powder to be connected, then obtain tungsten copper ashbury metal powder through the crushing and screening of disintegrating machine.Tungsten copper ashbury metal meal component prepared by preparation method of the present invention is even, density is high, mobile performance is excellent, be easy to shaping, solves the problem of easy segregation in traditional preparation methods, and preparation technology is simple, is easy to operation.
Accompanying drawing explanation
Fig. 1 is the tungsten copper ashbury metal powder pattern schematic diagram under the microscope that preparation method of the present invention prepares.
Detailed description of the invention
Technical scheme of the present invention is further illustrated below by detailed description of the invention.
As no specific instructions, various raw material of the present invention all can commercially availablely be buied, or prepares according to the conventional method of this area.
Embodiment 1
1) by weight percentage, 80% Production of Crystalline W Powder, 16% atomized copper powder and 4% glass putty is taken, wherein, the order number of Production of Crystalline W Powder gets 400 orders, the order number of glass putty gets 600 orders, and the order number of atomized copper powder gets 400 orders, and Production of Crystalline W Powder, glass putty and atomized copper powder purity are all greater than 99.5%;
2) Production of Crystalline W Powder, atomized copper powder, glass putty are joined in w-20 Double cone mixer, mixing 30min;
3) material is taken out, by carrying out High temperature diffusion in HYL-375-7Q steel belt type reducing furnace under protection gas or reducing atmosphere, design temperature is 950 degrees Celsius, and diffusion time is 5h, by the diffusion of glass putty in copper and in tungsten, realize copper and be connected with the alloy of tungsten;
4) after coming out of the stove, carry out crushing and screening by disintegrating machine, obtain tungsten copper ashbury metal powder.
According to MPIF sampling method (described MPIF sampling method is the general powder metallurgy sampling method in this area), the parameter recording alloy powder 4 diverse locations is as shown in table 1, the tungsten copper ashbury metal powder utilizing microscopic examination to prepare, is adjusted to 200 times of later pictures as shown in Figure 1 by multiplication factor.
Table 1
| Sample position is numbered | Flow velocity (s/50g) | Apparent density (g/cm 3) | Meso-position radius (μm) |
| 1 | 22.8 | 5.94 | 130 |
| 2 | 22.7 | 5.94 | 128 |
| 3 | 22.8 | 5.95 | 128 |
| 4 | 22.6 | 5.94 | 129 |
Embodiment 2
1) by weight percentage, 60% Production of Crystalline W Powder, 37% atomized copper powder and 3% glass putty is taken, wherein, the order number of Production of Crystalline W Powder gets 500 orders, the order number of glass putty gets 650 orders, and the order number of atomized copper powder gets 380 orders, and Production of Crystalline W Powder, glass putty and atomized copper powder purity are all greater than 99.5%;
2) Production of Crystalline W Powder, atomized copper powder, glass putty are joined in w-20 Double cone mixer, mixing 30min;
3) material is taken out, by carrying out High temperature diffusion in HYL-375-7Q steel belt type reducing furnace under protection gas or reducing atmosphere, design temperature is 800 degrees Celsius, and diffusion time is 4h, by the diffusion of glass putty in copper and in tungsten, realize copper and be connected with the alloy of tungsten;
4) after coming out of the stove, carry out crushing and screening by disintegrating machine, obtain tungsten copper ashbury metal powder.
According to MPIF sampling method, the parameter recording alloy powder 4 diverse locations is as shown in table 2:
Table 2
| Sample position is numbered | Flow velocity (s/50g) | Apparent density (g/cm 3) | Meso-position radius (μm) |
| 1 | 22.7 | 5.93 | 128 |
| 2 | 22.6 | 5.92 | 127 |
| 3 | 22.6 | 5.93 | 128 |
| 4 | 22.7 | 5.92 | 128 |
Embodiment 3
1) by weight percentage, 40% Production of Crystalline W Powder, 58% atomized copper powder and 2% glass putty is taken, wherein, the order number of Production of Crystalline W Powder gets 600 orders, the order number of glass putty gets 600 orders, and the order number of atomized copper powder gets 400 orders, and Production of Crystalline W Powder, glass putty and atomized copper powder purity are all greater than 99.5%;
2) Production of Crystalline W Powder, atomized copper powder, glass putty are joined in w-20 Double cone mixer, mixing 30min;
3) material is taken out, by carrying out High temperature diffusion in HYL-375-7Q steel belt type reducing furnace under protection gas or reducing atmosphere, design temperature is 750 degrees Celsius, and diffusion time is 3h, by the diffusion of glass putty in copper and in tungsten, realize copper and be connected with the alloy of tungsten;
4) after coming out of the stove, carry out crushing and screening by disintegrating machine, obtain tungsten copper ashbury metal powder.
According to MPIF sampling method, the parameter recording alloy powder 4 diverse locations is as shown in table 3:
Table 3
| Sample position is numbered | Flow velocity (s/50g) | Apparent density (g/cm 3) | Meso-position radius (μm) |
| 1 | 22.6 | 5.93 | 128 |
| 2 | 22.5 | 5.93 | 127 |
| 3 | 22.5 | 5.93 | 127 |
| 4 | 22.3 | 5.94 | 126 |
Embodiment 4
1) by weight percentage, 70% Production of Crystalline W Powder, 26% atomized copper powder and 4% glass putty is taken, wherein, the order number of Production of Crystalline W Powder gets 400 orders, the order number of glass putty gets 600 orders, and the order number of atomized copper powder gets 400 orders, and Production of Crystalline W Powder, glass putty and atomized copper powder purity are all greater than 99.5%;
2) Production of Crystalline W Powder, atomized copper powder, glass putty are joined in w-20 Double cone mixer, mixing 30min;
3) material is taken out, by carrying out High temperature diffusion in HYL-375-7Q steel belt type reducing furnace under protection gas or reducing atmosphere, design temperature is 780 degrees Celsius, and diffusion time is 5h, by the diffusion of glass putty in copper and in tungsten, realize copper and be connected with the alloy of tungsten;
4) after coming out of the stove, carry out crushing and screening by disintegrating machine, obtain tungsten copper ashbury metal powder.
According to MPIF sampling method, the parameter recording alloy powder 4 diverse locations is as shown in table 4:
Table 4
| Sample position is numbered | Flow velocity (s/50g) | Apparent density (g/cm 3) | Meso-position radius (μm) |
| 1 | 22.4 | 5.93 | 126 |
| 2 | 22.7 | 5.93 | 126 |
| 3 | 22.6 | 5.94 | 125 |
| 4 | 22.7 | 5.93 | 128 |
Embodiment 5
1) by weight percentage, 50% Production of Crystalline W Powder, 47% atomized copper powder and 3% glass putty is taken, wherein, the order number of Production of Crystalline W Powder gets 350 orders, the order number of glass putty gets 550 orders, and the order number of atomized copper powder gets 500 orders, and Production of Crystalline W Powder, glass putty and atomized copper powder purity are all greater than 99.5%;
2) Production of Crystalline W Powder, atomized copper powder, glass putty are joined in w-20 Double cone mixer, mixing 30min;
3) material is taken out, by carrying out High temperature diffusion in HYL-375-7Q steel belt type reducing furnace under protection gas or reducing atmosphere, design temperature is 800 degrees Celsius, and diffusion time is 4h, by the diffusion of glass putty in copper and in tungsten, realize copper and be connected with the alloy of tungsten;
4) after coming out of the stove, carry out crushing and screening by disintegrating machine, obtain tungsten copper ashbury metal powder.
According to MPIF sampling method, the parameter recording alloy powder 4 diverse locations is as shown in table 5:
Table 5
| Sample position is numbered | Flow velocity (s/50g) | Apparent density (g/cm 3) | Meso-position radius (μm) |
| 1 | 22.5 | 5.94 | 127 |
| 2 | 22.4 | 5.94 | 127 |
| 3 | 22.8 | 5.95 | 125 |
| 4 | 22.5 | 5.94 | 128 |
Composition graphs 1, preparation method of the present invention, under the connection of tin, tungsten particle (marking A in figure) and copper particle (marking B in figure) combine well, tungsten copper ashbury metal meal component prepared by method of the present invention is even, density is high, mobile performance is excellent, be easy to shaping, solve the problem of easy segregation in traditional preparation methods, and preparation technology is simple, is easy to operation.Tungsten copper ashbury metal powder prepared by the present invention is applicable to produce brokenly first material and contact material.
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (8)
1. a preparation method for tungsten copper ashbury metal powder, is characterized in that, comprises the following steps:
1) by weight percentage, take the Production of Crystalline W Powder of 40 ~ 80%, the atomized copper powder of 10 ~ 60% and 2 ~ 4% glass putty;
2) Production of Crystalline W Powder, atomized copper powder, glass putty are added in two-dimentional batch mixer be mixed to get tungsten copper tin composite powder;
3) by tungsten copper tin composite powder take out be placed in steel belt reduction furnace protection gas or reducing atmosphere under carry out High temperature diffusion;
4), after the tungsten copper tin composite powder after High temperature diffusion being taken out, carry out crushing and screening by disintegrating machine, obtain tungsten copper ashbury metal powder.
2. the preparation method of a kind of tungsten copper ashbury metal powder according to claim 1, is characterized in that, the order number of described Production of Crystalline W Powder is-325 orders, and the order number of described glass putty is-500 orders, and the order number of described atomized copper powder is-320 orders.
3. the preparation method of a kind of tungsten copper ashbury metal powder according to claim 1, it is characterized in that, the purity of described Production of Crystalline W Powder, described glass putty and described atomized copper powder is greater than 99.5%.
4. the preparation method of a kind of tungsten copper ashbury metal powder according to claim 1, is characterized in that, described step 2) in two-dimentional batch mixer be Double cone mixer.
5. the preparation method of a kind of tungsten copper ashbury metal powder according to claim 1, is characterized in that, described step 2) in incorporation time be 20 ~ 40min.
6. the preparation method of a kind of tungsten copper ashbury metal powder according to claim 1, is characterized in that, described step 3) in steel belt reduction furnace be HYL-375-7Q steel belt type reducing furnace.
7. the preparation method of a kind of tungsten copper ashbury metal powder according to claim 1, is characterized in that, described step 3) in the temperature of High temperature diffusion be 750 ~ 950 DEG C.
8. the preparation method of a kind of tungsten copper ashbury metal powder according to claim 1, is characterized in that, described step 3) in time of High temperature diffusion be 3 ~ 5h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048301A (en) * | 2016-07-21 | 2016-10-26 | 安徽旭晶粉体新材料科技有限公司 | Spray method for preparing tungsten-containing copper alloy powder |
| CN107841703A (en) * | 2017-09-21 | 2018-03-27 | 芜湖鼎恒材料技术有限公司 | Tungsten copper coating material used for electronic packaging and preparation method thereof |
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| CN101585084A (en) * | 2001-10-11 | 2009-11-25 | 维尔国际有限公司 | Process for the production of sintered porous bodies |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048301A (en) * | 2016-07-21 | 2016-10-26 | 安徽旭晶粉体新材料科技有限公司 | Spray method for preparing tungsten-containing copper alloy powder |
| CN107841703A (en) * | 2017-09-21 | 2018-03-27 | 芜湖鼎恒材料技术有限公司 | Tungsten copper coating material used for electronic packaging and preparation method thereof |
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Denomination of invention: Preparation method of tungsten-copper-tin alloy powder Effective date of registration: 20190107 Granted publication date: 20180731 Pledgee: Bank of Communications Ltd Kunshan branch Pledgor: Kunshan Detai Metal Technology Co., Ltd. Registration number: 2019320010002 |
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Date of cancellation: 20211021 Granted publication date: 20180731 Pledgee: Bank of Communications Ltd. Kunshan branch Pledgor: KUNSHAN DETAI METAL TECHNOLOGY Co.,Ltd. Registration number: 2019320010002 |