CN109249030A - The preparation method of tungsten-cobalt series hard alloy - Google Patents

The preparation method of tungsten-cobalt series hard alloy Download PDF

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Publication number
CN109249030A
CN109249030A CN201811038114.XA CN201811038114A CN109249030A CN 109249030 A CN109249030 A CN 109249030A CN 201811038114 A CN201811038114 A CN 201811038114A CN 109249030 A CN109249030 A CN 109249030A
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CN
China
Prior art keywords
tungsten
preparation
hard alloy
whirlwind
cobalt
Prior art date
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Pending
Application number
CN201811038114.XA
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Chinese (zh)
Inventor
边伟
袁晓波
薛桂全
李尧
王树宏
孙娜
贾耀波
项凤鸣
李军旗
蒋益民
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Jincheng Hongren Technology Co Ltd
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Jincheng Hongren Technology Co Ltd
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Priority to CN201811038114.XA priority Critical patent/CN109249030A/en
Publication of CN109249030A publication Critical patent/CN109249030A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling

Abstract

The present invention relates to a kind of preparation methods of tungsten-cobalt series hard alloy, comprising the following steps: tungsten carbide powder is carried out spray drying after wet-milling mixes with cobalt powder and obtains granulation material and whirlwind material；Ratio by the granulation material and the whirlwind material according to mass ratio more than or equal to 3.38 mixes, and mixes with forming agent and obtain mixture；And by the mixture extrusion forming, drying, sintering to obtain tungsten-cobalt series hard alloy.The preparation method of tungsten-cobalt series hard alloy of the invention realizes the recycling of whirlwind material, advantageously reduces the wasting of resources and saves production cost.

Description

The preparation method of tungsten-cobalt series hard alloy
Technical field
The present invention relates to CEMENTED CARBIDE PRODUCTION technical field more particularly to a kind of preparation methods of tungsten-cobalt series hard alloy.
Background technique
In the prior art, production hard alloy mostly uses greatly spray drying tower to do the hard alloy material after wet-milling Dry granulation.When being spray-dried, the hard alloy material of slurry shape is broken up into small liquid under pressure pump and atomizer effect Drop, these droplets form the granulation material for meeting certain particle size grade under high temperature action, meanwhile, it is subtle under exhaust fan effect Powder forms whirlwind material by cyclone collection.Since the average grain diameter of whirlwind material is small, it is high that when compression molding, fills out powder degree, inside answers Power is larger, exhaust problem, insufficient formability；Forming agent is not easy to wrap up its surface when extrusion forming, and insufficient formability leads to whirlwind material It is difficult to rationally utilize.
However, hard alloy Material Cost is higher, product profit rate is low, through counting, during the preparation process, the conjunction prepared The granulation material of lattice accounts for about the 88~92% of the total input amount of raw material, and direct losses raw material accounts for about 3%, and whirlwind material accounts for about 3~7%, because This, whirlwind material, which is carried out rationally utilization, will become profit growth point.In order to recycle whirlwind material, usually whirlwind material is carried out Secondary heavy industry processing becomes qualified granulation material, but there are secondary loss for heavy industry processing, and increase and be produced into This.
Summary of the invention
To solve to be difficult to again using the whirlwind material that drying process with atomizing prepares the generation of tungsten-cobalt series hard alloy in the prior art The technical issues of utilization, the present invention provide a kind of W-Co kind hard that qualified tungsten-cobalt series hard alloy can be produced using whirlwind material The preparation method of alloy.
The present invention provides a kind of preparation method of tungsten-cobalt series hard alloy, comprising the following steps:
Tungsten carbide powder is subjected to spray drying after wet-milling mixes with cobalt powder and obtains granulation material and whirlwind material；
Ratio by the granulation material and the whirlwind material according to mass ratio more than or equal to 3.38 mixes, and mixed with forming agent It closes and obtains mixture；And
By the mixture extrusion forming, drying, sintering to obtain tungsten-cobalt series hard alloy.
The whirlwind material that the preparation method of tungsten-cobalt series hard alloy provided by the invention obtains drying process with atomizing is according to one Fixed ratio and qualified granulation material are mixed with tungsten-cobalt series hard alloy, in the feelings for not influencing tungsten-cobalt series hard alloy yields Both the reasonable utilization that whirlwind material had been realized under condition, also reduces production cost.
Detailed description of the invention
Fig. 1 is the flow chart of the preparation method of tungsten-cobalt series hard alloy provided by the invention.
Fig. 2 is that the preparation method of tungsten-cobalt series hard alloy shown in FIG. 1 is obtained by Examples 1 to 4 and comparative example 1~5 The quality testing comparing result of sample.
Specific embodiment
The present invention provides a kind of preparation method of tungsten-cobalt series hard alloy, can be realized in spray-drying process by whirlwind point Recycling from the whirlwind material that device is collected.It is appreciated that fine-powder is in exhausting during being granulated using spray drying Whirlwind material is formed by cyclone collection under machine effect.
Referring to Fig. 1, the preparation method of tungsten-cobalt series hard alloy provided by the invention, mainly comprises the steps that
S1: tungsten carbide powder is subjected to spray drying after wet-milling mixes with cobalt powder and obtains granulation material and whirlwind material；
S2: the ratio by granulation material and whirlwind material according to mass ratio more than or equal to 3.38 mixes, and mixes and obtain with forming agent Obtain mixture；And
S3: by mixture extrusion forming, drying, sintering to obtain tungsten-cobalt series hard alloy.
Further, the average grain diameter of tungsten carbide powder is 0.4~0.8 μm.The average grain diameter of cobalt powder is 0.8~1.0 μm.
Further, forming agent can be ethyl cellulose, be also possible to paraffin or PEG (polyethylene glycol).
Further, the average grain diameter of the granulation material is 80~150 μm, and apparent density is more than or equal to 3.3g/cm3。 The average grain diameter of the whirlwind material is 3~15 μm.
Embodiment 1
In the present embodiment, the preparation method of tungsten-cobalt series hard alloy is the following steps are included: tungsten carbide powder and cobalt powder are carried out Spray drying obtains granulation material and whirlwind material after wet-milling mixing, wherein whirlwind material is obtained by cyclone collection, granulation material Apparent density is 3.3g/cm3；By the ethyl cellulose of the granulation material of 55 mass parts, the whirlwind material of 5 mass parts and 4.4 mass parts Mixing obtains mixture；By mixture extrusion forming, drying, sintering to obtain tungsten-cobalt series hard alloy.
Embodiment 2
The preparation method of the present embodiment and tungsten-cobalt series hard alloy in embodiment 1 include the steps that it is essentially identical, difference It is in and is obtained in: mixture by the ethyl cellulose mixing of the granulation material of 50 mass parts, the whirlwind material of 10 mass parts and 4.4 mass parts ?.
Embodiment 3
The preparation method of the present embodiment and tungsten-cobalt series hard alloy in embodiment 1 include the steps that it is essentially identical, difference It is in and is obtained in: mixture by the ethyl cellulose mixing of the granulation material of 47 mass parts, the whirlwind material of 13 mass parts and 4.4 mass parts ?.
Embodiment 4
The preparation method of the present embodiment and tungsten-cobalt series hard alloy in embodiment 1 include the steps that it is essentially identical, difference Be in: mixture is mixed by the ethyl cellulose of the granulation material of 46.3 mass parts, the whirlwind material of 13.7 mass parts and 4.4 mass parts It closes and obtains.
Comparative example 1
This comparative example and the preparation method of tungsten-cobalt series hard alloy in embodiment 1 include the steps that it is essentially identical, difference Be in: mixture is mixed by the ethyl cellulose of the granulation material of 46.2 mass parts, the whirlwind material of 13.8 mass parts and 4.4 mass parts It closes and obtains.
Comparative example 2
This comparative example and the preparation method of tungsten-cobalt series hard alloy in embodiment 1 include the steps that it is essentially identical, difference It is in and is obtained in: mixture by the ethyl cellulose mixing of the granulation material of 46 mass parts, the whirlwind material of 14 mass parts and 4.4 mass parts ?.
Comparative example 3
This comparative example and the preparation method of tungsten-cobalt series hard alloy in embodiment 1 include the steps that it is essentially identical, difference It is in and is obtained in: mixture by the ethyl cellulose mixing of the granulation material of 45 mass parts, the whirlwind material of 15 mass parts and 4.4 mass parts ?.
Comparative example 4
This comparative example and the preparation method of tungsten-cobalt series hard alloy in embodiment 1 include the steps that it is essentially identical, difference It is in and is obtained in: mixture by the ethyl cellulose mixing of the granulation material of 30 mass parts, the whirlwind material of 30 mass parts and 4.4 mass parts ?.
Comparative example 5
This comparative example and the preparation method of tungsten-cobalt series hard alloy in embodiment 1 include the steps that it is essentially identical, difference It is in and is obtained in: mixture by the ethyl cellulose mixing of the granulation material of 10 mass parts, the whirlwind material of 50 mass parts and 4.4 mass parts ?.
It should be noted that the raw material and technological parameter that Examples 1 to 4 and comparative example 1~5 use are almost the same.
Referring to Fig. 2, extruding of the mixture obtained to Examples 1 to 4 and comparative example 1~5 during extrusion forming Required squeeze pressure is observed and measured to feeding pattern, in addition, calculating the tungsten-cobalt that Examples 1 to 4 and comparative example 1~5 obtain The non-defective unit quantity of series hard alloy, wherein the sample size that each embodiment or comparative example are detected is 50.
Exist according to Fig. 2 it is found that granulation material is mixed the mixture obtained according to the mass ratio more than or equal to 3.38 with whirlwind material The soft or hard all non-defective units of W-Co kind hart metal product that are suitable, and preparing of dry and wet during extrusion forming.Therefore, of the invention The preparation method of the tungsten-cobalt series hard alloy of offer realizes the recycling of whirlwind material, advantageously reduces the wasting of resources and saves life Produce cost.
The above is only embodiments of the present invention, are not intended to limit the scope of the invention, all to utilize the present invention Equivalent structure or equivalent flow shift made by specification and accompanying drawing content is applied directly or indirectly in other relevant technologies Field is included within the scope of the present invention.

Claims (7)

1. a kind of preparation method of tungsten-cobalt series hard alloy, it is characterised in that: the following steps are included:
Tungsten carbide powder is subjected to spray drying after wet-milling mixes with cobalt powder and obtains granulation material and whirlwind material；
Ratio by the granulation material and the whirlwind material according to mass ratio more than or equal to 3.38 mixes, and mixes and obtain with forming agent Obtain mixture；And
By the mixture extrusion forming, drying, sintering to obtain tungsten-cobalt series hard alloy.
2. preparation method as described in claim 1, it is characterised in that: the apparent density of the granulation material is more than or equal to 3.3g/ cm3。
3. preparation method as described in claim 1, it is characterised in that: the average grain diameter of the granulation material is 80~150 μm.
4. preparation method as described in claim 1, it is characterised in that: the average grain diameter of the whirlwind material is 3~15 μm.
5. preparation method as described in claim 1, it is characterised in that: the forming agent is ethyl cellulose, paraffin and poly- second Any one of glycol.
6. preparation method as described in claim 1, it is characterised in that: the average grain diameter of the tungsten carbide powder is 0.4~0.8 μ m。
7. preparation method as described in claim 1, it is characterised in that: the average grain diameter of the cobalt powder is 0.8~1.0 μm.
CN201811038114.XA 2018-09-06 2018-09-06 The preparation method of tungsten-cobalt series hard alloy Pending CN109249030A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1554789A (en) * 2003-12-29 2004-12-15 株洲硬质合金集团有限公司 Process for preparing tungsten-cobalt hard alloy
WO2008065845A1 (en) * 2006-11-28 2008-06-05 Osaka Titanium Technologies Co., Ltd. METHOD FOR FABRICATING SiO SINTERED BODY
CN101338382A (en) * 2007-07-06 2009-01-07 湖南世纪特种合金有限公司 Method for preparing high strength cemented carbide
CN101956114A (en) * 2010-10-14 2011-01-26 浙江恒成硬质合金有限公司 Formula of tungstate and cobalt hard alloy
CN103232247A (en) * 2013-04-18 2013-08-07 上海大学 Preparation method of alumina polycrystalline material block
TWM493009U (en) * 2014-09-17 2015-01-01 Taiwan Global Conservation Technology Internat Co Ltd Grate device of combustion furnace
JP2018021262A (en) * 2017-11-10 2018-02-08 学校法人立命館 Metallic material and method for producing metallic material
CN108118230A (en) * 2017-12-22 2018-06-05 株洲硬质合金集团有限公司 A kind of hard alloy and preparation method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1554789A (en) * 2003-12-29 2004-12-15 株洲硬质合金集团有限公司 Process for preparing tungsten-cobalt hard alloy
WO2008065845A1 (en) * 2006-11-28 2008-06-05 Osaka Titanium Technologies Co., Ltd. METHOD FOR FABRICATING SiO SINTERED BODY
CN101338382A (en) * 2007-07-06 2009-01-07 湖南世纪特种合金有限公司 Method for preparing high strength cemented carbide
CN101956114A (en) * 2010-10-14 2011-01-26 浙江恒成硬质合金有限公司 Formula of tungstate and cobalt hard alloy
CN103232247A (en) * 2013-04-18 2013-08-07 上海大学 Preparation method of alumina polycrystalline material block
TWM493009U (en) * 2014-09-17 2015-01-01 Taiwan Global Conservation Technology Internat Co Ltd Grate device of combustion furnace
JP2018021262A (en) * 2017-11-10 2018-02-08 学校法人立命館 Metallic material and method for producing metallic material
CN108118230A (en) * 2017-12-22 2018-06-05 株洲硬质合金集团有限公司 A kind of hard alloy and preparation method thereof

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Title
张洪刚等: "硬质合金喷雾干燥回收料的使用研究", 《四川冶金》 *

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Application publication date: 20190122