CN103394690A - Cemented carbide powder used in production of nozzles, and preparation method thereof - Google Patents
Cemented carbide powder used in production of nozzles, and preparation method thereof Download PDFInfo
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- CN103394690A CN103394690A CN2013103512187A CN201310351218A CN103394690A CN 103394690 A CN103394690 A CN 103394690A CN 2013103512187 A CN2013103512187 A CN 2013103512187A CN 201310351218 A CN201310351218 A CN 201310351218A CN 103394690 A CN103394690 A CN 103394690A
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- cemented carbide
- carbide powder
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- adhesive
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Abstract
The invention discloses cemented carbide powder used in production of nozzles, and a preparation method thereof. The cemented carbide powder comprises the following raw materials of WC, Ni, TiC, Co, Cr2C3 and TaC; the preparation method of the cemented carbide powder comprises the following steps: S1, weighting the raw materials for standby; S2, adding the raw materials weighted in S1 into a ball grinder, and using alcohol as a grinding media for performing ball mill; S3, drying powder subjected to ball mill by using a vapor dryer, and then adding adhesive Buna after drying; S4, again drying the power added with the adhesive Buna in S3, screening after drying to prepare the cemented carbide powder. According to the invention, the shortage of cobalt and tungsten resources in the world is effectively alleviated, and threat to human health caused by the fact that in the use process of the cemented carbide, cobalt can be oxidized to generate toxical Co6+; compared with nozzles produced by a traditional sintering process, the nozzles produced by using the cemented carbide powder provided by the invention have characteristics of light specific weight, high hardness, low cost, safety and environmental protection, and can meet quality requirements on bending strength.
Description
Technical field
The invention belongs to the metal alloy field, be specifically related to a kind of cemented carbide powder that nozzle uses and preparation method thereof of producing.
Background technology
The fast development of modern industry needs various injection apparatus.The manufacturing various paint lines such as the spray for dust suppression of the various cleaning equipments of mechanical industry, bargh, the spraying of metallurgy industry are cooling, motorcycle, bicycle, refrigerator, washing machine, beautify sandblasting, spray water with high pressure etc. and all needing in a large number nozzle of various items surface, and adopted not only processing difficulties of nozzle that the materials such as high-speed steel make in the past, and material hardness is low, abrasion resistance is poor, cause jetting stability and uniformity poor, service life is short, and jeting effect is poor and cost is high.
Carbide alloy is a class composite of being made through powder metallurgy process by refractory metal hard compounds (hard phase) and metal adhesive (Binder Phase).With the tungsten carbide base carbide alloy material, mainly by matrix tungsten carbide and Binder Phase cobalt, formed, the tungsten-cobalt carbide series hard metal is to develop the earliest in carbide alloy and the most ripe a kind of carbide alloy.Up to the present, the tungsten-cobalt carbide series hard metal remains the topmost part in carbide alloy field, and therefore, the research of tungsten-cobalt carbide series hard metal has important impact to whole hard carbide industry.Cobalt is owing to carbide there being good wettability, and with the alloy that carbide forms, stronger intensity arranged, and since carbide alloy comes out, has been widely used as the binding metal of carbide alloy always.Yet because world's cobalt resource is very limited, in addition, carbide alloy in use cobalt likely is oxidized to the virose Co of tool
6+, health is caused potential threat, the substitution material of therefore finding and study cobalt is exactly always important topic in carbide alloy research and production; Though China is the more country of tungsten deposit, but since the carbide alloy invention, always take tungsten carbide as main raw material(s), face the worsening shortages of tungsten resource, though and other materials or part replace tungsten carbide great function played in the shortage of alleviating resource, use at present the material such as other metal carbides as the substitute of tungsten carbide have that the carbide alloy property indices descends, alloy substrate non-oxidizability and the problems such as corrosion stability is poor, production cost is high.
Chinese patent CN102328074A has announced a kind of carboloy nozzle and preparation method thereof, carboloy nozzle comprises cemented carbide powder, binding agent, and binding agent comprises medical paraffin 10%～17%, ceresine 15%～21%, high density polyethylene (HDPE) 30%～55%, EVA resin 20%～32%; The method of producing carboloy nozzle is with after binding agent mixes with cemented carbide powder, repeatedly mixing, be placed in again injection (mo(u)lding) machine and obtain blank, put into that three polyethylene dissolve, degreasing, enter finally in vacuum drying oven and sinter finished product into, though that nozzle that this invention is produced has abrasion resistance is strong, stability and the uniformity of spraying are higher, life-span is long, the advantage that use cost is low, but and the unexposed method for preparing the concrete composition of nozzle alloy powder and prepare alloy powder.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, a kind of cemented carbide powder that nozzle uses and preparation method thereof of producing is provided, the present invention has certain mitigation to world's cobalt and tungsten resource shortage, the nozzle of producing has light specific gravity, hardness is large, cost is low, the characteristic of safety and environmental protection, and bending strength conforms to quality requirements.
Purpose of the present invention is achieved through the following technical solutions: a kind ofly produce the cemented carbide powder that nozzle is used, it is comprised of the raw material of following weight portion:
WC 78～82，Ni 4～8，
TiC 8～12，Co 1～3，
Cr
2C
3 1～3，TaC 1～3。
A kind of preparation method who produces the cemented carbide powder that nozzle uses, it comprises the following steps:
S1. take respectively the raw material for standby of above-mentioned weight portion; Wherein, described WC is fecula again;
S2. the raw material that takes in step S1 is added in ball mill, adding 95～98% alcohol in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:4～8, then to add weight be that the alloying pellet of 3～4 times of raw materials carries out ball milling, rotating speed is 45～55r/min, ball milling 45～52h;
S3. the powder after ball milling is dried with steam drying machine, bake out temperature is 48～53 ℃, and drying time is 1.8～2.3h, adds the adhesive buna after oven dry, and wherein, the adhesive buna is 1:48～55 with the weight ratio of oven dry powder;
S4. will add the powder of adhesive buna again with steam drying machine, to dry in step S3, bake out temperature be 98～105 ℃, and drying time is 2.3～2.8h, crosses 70～90 mesh sieves after oven dry, makes cemented carbide powder.
The present invention has the following advantages: WC of the present invention adopts the regenerative raw materials of industrial recovery, alloyed powder substitutes a large amount of Co with Ni, effectively alleviated the shortage of world's cobalt and tungsten resource, reduced carbide alloy in use cobalt likely be oxidized to the virose Co of tool
6+Threat to health; Compared with prior art, the alloy nozzle of alloyed powder manufacturing of the present invention has advantages of light specific gravity, hardness is large, cost is low, safety and environmental protection, and bending strength conforms to quality requirements.
The specific embodiment
The present invention will be further described below in conjunction with embodiment, and protection scope of the present invention is not limited to the following stated.
Embodiment 1: a kind ofly produce the cemented carbide powder that nozzle is used, it is comprised of the raw material of following weight portion:
WC 78，Ni 4，
TiC 8，Co 1，
Cr
2C
3 1，TaC 1。
A kind of preparation method who produces the cemented carbide powder that nozzle uses, it comprises the following steps:
S1. take respectively the raw material for standby of above-mentioned weight portion; Wherein, described WC is fecula again;
S2. the raw material that takes in step S1 is added in ball mill, adding 95% alcohol in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:4, then to add weight be that the alloying pellet of 3 times of raw materials carries out ball milling, rotating speed is 45r/min, ball milling 45h;
S3. the powder after ball milling is dried with steam drying machine, bake out temperature is 48 ℃, and drying time is 1.8h, adds the adhesive buna after oven dry, and wherein, the adhesive buna is 1:48 with the weight ratio of oven dry powder;
S4. will add the powder of adhesive buna again with steam drying machine, to dry in step S3, bake out temperature be 98 ℃, and drying time is 2.3h, crosses 70 mesh sieves after oven dry, makes cemented carbide powder.
Embodiment 2: a kind ofly produce the cemented carbide powder that nozzle is used, it is comprised of the raw material of following weight portion:
WC 82，Ni 8，
TiC 12，Co 3，
Cr
2C
3 3，TaC 3。
A kind of preparation method who produces the cemented carbide powder that nozzle uses, it comprises the following steps:
S1. take respectively the raw material for standby of above-mentioned weight portion; Wherein, described WC is fecula again;
S2. the raw material that takes in step S1 is added in ball mill, adding 98% alcohol in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:8, then to add weight be that the alloying pellet of 4 times of raw materials carries out ball milling, rotating speed is 55r/min, ball milling 52h;
S3. the powder after ball milling is dried with steam drying machine, bake out temperature is 53 ℃, and drying time is 2.3h, adds the adhesive buna after oven dry, and wherein, the adhesive buna is 1:55 with the weight ratio of oven dry powder;
S4. will add the powder of adhesive buna again with steam drying machine, to dry in step S3, bake out temperature be 105 ℃, and drying time is 2.8h, crosses 90 mesh sieves after oven dry, makes cemented carbide powder.
Embodiment 3: a kind ofly produce the cemented carbide powder that nozzle is used, it is comprised of the raw material of following weight portion:
WC 80，Ni 6，
TiC 10，Co 2，
Cr
2C
3 1.5，TaC 2.5。
A kind of preparation method who produces the cemented carbide powder that nozzle uses, it comprises the following steps:
S1. take respectively the raw material for standby of above-mentioned weight portion; Wherein, described WC is fecula again;
S2. the raw material that takes in step S1 is added in ball mill, adding 97% alcohol in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:6, then to add weight be that the alloying pellet of 3.5 times of raw materials carries out ball milling, rotating speed is 50r/min, ball milling 48h;
S3. the powder after ball milling is dried with steam drying machine, bake out temperature is 50 ℃, and drying time is 2h, adds the adhesive buna after oven dry, and wherein, the adhesive buna is 1:52 with the weight ratio of oven dry powder;
S4. will add the powder of adhesive buna again with steam drying machine, to dry in step S3, bake out temperature be 102 ℃, and drying time is 2.4h, crosses 80 mesh sieves after oven dry, makes cemented carbide powder.
Embodiment 4: a kind ofly produce the cemented carbide powder that nozzle is used, it is comprised of the raw material of following weight portion:
WC 78，Ni 5，
TiC 8，Co 1.5，
Cr
2C
3 1，TaC 2。
A kind of preparation method who produces the cemented carbide powder that nozzle uses, it comprises the following steps:
S1. take respectively the raw material for standby of above-mentioned weight portion; Wherein, described WC is fecula again;
S2. the raw material that takes in step S1 is added in ball mill, adding 95% alcohol in ball mill is abrasive media, and the addition of alcohol and the weight ratio of raw material are 1:8, then to add weight be that the alloying pellet of 3.2 times of raw materials carries out ball milling, rotating speed is 55r/min, ball milling 48h;
S3. the powder after ball milling is dried with steam drying machine, bake out temperature is 53 ℃, and drying time is 1.8h, adds the adhesive buna after oven dry, and wherein, the adhesive buna is 1:53 with the weight ratio of oven dry powder;
S4. will add the powder of adhesive buna again with steam drying machine, to dry in step S3, bake out temperature be 105 ℃, and drying time is 2.3h, crosses 90 mesh sieves after oven dry, makes cemented carbide powder.
Further, in order to verify that scheme provided by the present invention can reach technique effect, the nozzle performance of the nozzle that the scheme that embodiment 1,2,3 and 4 is provided prepares and the preparation of ordinary rigid alloyed powder is tested, ordinary rigid alloyed powder composition is: WC:94%, Co:6%, concrete experimental data is as shown in the table:
| Numbering | Hardness (HRA) | Density (g/cm 3） | Bending strength (N/mm 2） |
| Plain nozzle | 89.5 | 14.7 | 1600 |
| Embodiment 1 | 90.8 | 13.5 | 1550 |
| Embodiment 2 | 91.0 | 12.5 | 1600 |
| Embodiment 3 | 90.6 | 13.2 | 1560 |
| Embodiment 4 | 90.8 | 12.8 | 1580 |
As seen from the above table: the nozzle for preparing with the cemented carbide powder that the inventive method provides is higher than the hardness number of plain nozzle, density value is low, bending strength numerical value difference is little, therefore, that the nozzle of cemented carbide powder provided by the invention preparation has advantages of is lightweight, hardness is large, and bending strength conforms to quality requirements.
Claims (4)
1. produce the cemented carbide powder that nozzle is used for one kind, it is characterized in that, it is comprised of the raw material of following weight portion:
WC 78～82， Ni 4～8，
TiC 8～12， Co 1～3，
Cr
2C
3 1～3， TaC 1～3。
2. a kind of cemented carbide powder that nozzle is used of producing according to claim 1, is characterized in that, described WC is fecula again.
3. a kind of preparation method who produces the cemented carbide powder that nozzle uses claimed in claim 1, is characterized in that, it comprises the following steps:
S1. take respectively the raw material for standby of above-mentioned weight portion;
S2. the raw material that takes in step S1 is added in ball mill, adding 95～98% alcohol in ball mill is abrasive media, the addition of alcohol and the weight ratio of raw material are 1:4～8, adding weight is that the alloying pellet of 3～4 times of raw materials carries out ball milling again, rotating speed is 45～55r/min, ball milling 45～52h;
S3. the powder after ball milling is dried with steam drying machine, bake out temperature is 48～53 ℃, and drying time is 1.8～2.3h, adds adhesive after oven dry, and wherein, adhesive is 1:48～55 with the weight ratio of oven dry powder;
S4. will add the powder of adhesive again with steam drying machine, to dry in step S3, bake out temperature be 98～105 ℃, and drying time is 2.3～2.8h, crosses 70～90 mesh sieves after oven dry, makes cemented carbide powder.
4. a kind of preparation method who produces the cemented carbide powder that nozzle uses according to claim 3, is characterized in that, in described step S3, S4, adhesive is buna.
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|---|---|---|---|
| CN201310351218.7A CN103394690B (en) | 2013-08-13 | 2013-08-13 | A kind of cemented carbide powder producing nozzle and preparation method thereof |
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|---|---|---|---|
| CN201310351218.7A CN103394690B (en) | 2013-08-13 | 2013-08-13 | A kind of cemented carbide powder producing nozzle and preparation method thereof |
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| CN103394690B CN103394690B (en) | 2015-08-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104372227A (en) * | 2014-10-14 | 2015-02-25 | 遵义中铂硬质合金有限责任公司 | Hard alloy for hot-working die and production method thereof |
| CN105714170A (en) * | 2014-12-03 | 2016-06-29 | 自贡硬质合金有限责任公司 | Hard alloy and preparation method thereof |
| CN106238224A (en) * | 2016-09-07 | 2016-12-21 | 洛阳豫鹭矿业有限责任公司 | A kind of nozzle for mineral floating equipment |
| US9765573B2 (en) * | 2015-05-25 | 2017-09-19 | Shanghai Gogoal Industry Co., Ltd. | Composite tungsten carbide insert with heterogeneous composition and structure and manufacturing method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372227A (en) * | 2014-10-14 | 2015-02-25 | 遵义中铂硬质合金有限责任公司 | Hard alloy for hot-working die and production method thereof |
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| CN105714170B (en) * | 2014-12-03 | 2017-12-05 | 自贡硬质合金有限责任公司 | Hard alloy and preparation method thereof |
| US9765573B2 (en) * | 2015-05-25 | 2017-09-19 | Shanghai Gogoal Industry Co., Ltd. | Composite tungsten carbide insert with heterogeneous composition and structure and manufacturing method thereof |
| CN106238224A (en) * | 2016-09-07 | 2016-12-21 | 洛阳豫鹭矿业有限责任公司 | A kind of nozzle for mineral floating equipment |
| CN106238224B (en) * | 2016-09-07 | 2017-09-26 | 洛阳豫鹭矿业有限责任公司 | A kind of nozzle for mineral floating equipment |
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| CN103394690B (en) | 2015-08-19 |
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