CN102699330A - Method for producing hard-alloy stud assembled on roll surfaces - Google Patents
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Abstract
The invention relates to a method for producing hard-alloy stud assembled on roll surfaces, which comprises the following steps: proportioning; wet-grinding; drying and granulating; pressing and moulding; and sintering. The mass percent of the WC powder and the Co powder which are proportioned is (85-90): (10-15); the WC powder comprises coarse-grained WC powder and medium-coarse-grained WC powder; the combined carbon in the WC powder accounts for 6.11-6.13%, and the total carbon accounts for 6.14-6.16%; the coarse-grained WC powder has the Fisher particle size of 15-19mum and the ball-milling coefficient of 3.9-4.5KA/m; the medium-coarse-grained WC powder has the Fisher particle size of 10-14mum and the ball-milling coefficient of 4.8-5.4KA/m; and the weight ratio of the coarse-grained WC powder to the medium-coarse-grained WC powder is 40:60. The hard-alloy product produced by adopting the method is assembled on the roll surface of the rolling machine, has high strength, high toughness and excellent abrasion resistance and can well protect the roll surface of the rolling machine.
Description
Technical field
The invention belongs to the Hardmetal materials preparation field, particularly a kind of preparation method of carbide alloy roll surface post nail.
Background technology
The roll squeezer (or claiming high-pressure roller mill, squeezing mill, roll-in mill) that is widely used in grinding fields such as clinker, cement slurry, slag, slag, iron ore, chemical industry; It is the energy-conservation milling equipment of novel concrete that international the mid-80 grows up; Have alternative energy consumption height, the low preparatory grinding system of ball mill of efficient; Can make the ball mill system throughput improve 30-50%, obtain tangible Increasing Production and Energy Saving effect.For wearability and the shock resistance requirement that improves the roll squeezer roll surface; What its roll surface adopted is the method for tungsten carbide button's post nail; But the carbide alloy trade mark that conventional hard alloy columnar nail is selected for use is high cobalt, fine grained Talide, though the build-up wear-resistant layer performance that roll surface adopted more in the past have greatly improved because because in the hard alloy production process of the high cobalt trade mark; It is the difficult point and the emphasis of control in producing that cobalt distributes mutually uniformly always; Be easy to generate alloy defects such as cobalt gathering or WC gathering, can improve the crystal grain clustering phenomena through prolonging the ball milling time, but the tungsten carbide crystal grain refinement can occur; In sintering, form the inhomogeneous tissue defects of growing up, the phenomenon that shock resistance is not strong.And roll squeezer use working environment and operating mode are more abominable, and the wearability and the impact resistance of post nail still can't satisfy instructions for use.
Summary of the invention
The technical problem that the present invention will solve provides a kind of hart metal product with duplex grain structure, and the preparation method of this hart metal product, and the hart metal product of made is applied to roll squeezer, has high wearability and impact resistance.
In order to overcome the above problems, preparation method of the present invention comprises batching, wet-milling, drying and granulating, compression moulding, sintering circuit step, said burden process: the mass percent of WC powder and Co powder is (85-90): (10～15); Said WC powder by thick, in the WC powder of thick two kinds of granularities form, the copmbined-carbon of WC powder is at 6.11%-6.13%, total carbon is at 6.14%-6.16%, and the granularity of coarse granule WC powder is (15～19) μ m, the ball milling coefficient value is at 3.9-4.5KA/m; The Fisher particle size of middle coarse granule WC powder is (10～14) μ m, and the ball milling coefficient value is at 4.8-5.4KA/m; The mass ratio of coarse granule WC powder and middle coarse granule WC powder is 40: 60.
The present invention obtains a kind of hard metal article of duplex grain structure through research and experiment, promptly a kind of in the structure of coarse granule WC and formed non-uniform Distribution after a kind of thick thick WC mixes in proportion.Adopt the tungsten carbide of this wide size distribution to prepare the alloy with wide size distribution, main effect is that cobalt is distributed mutually more uniformly, has avoided alloy defects such as cobalt gathering or WC gathering.Especially the tungsten carbide that is adopted is " three height " tungsten carbide (high temperature reduction, high temperature cabonization, high copmbined-carbon), and the WC carbonization is complete, has big subgrain size, does not contain W basically
2The simple substance phase of C phase.Through in mix a certain proportion of coarse granule tungsten carbide in the coarse grained tungsten carbide, finally reach the size distribution of certain tungsten carbide in the alloy, make it to contain a certain amount of big crystal grain tungsten carbide that physically well develops, do not have defective.This big crystal grain tungsten carbide can impel that direction changes in the crack propagation process, and the inevitable consumed energy of this change, thereby hindered the cracking expansion, strengthen alloy fracture toughness.This contain the coarse grain tungsten carbide and reach a certain proportion of alloy not only have the big characteristic of intensity high rigidity, and crackle can not pass through easily, thereby improves the fracture toughness of alloy, the post of being produced nail has following performance:
1. post nail intensity is high, and wearability is good, and impact resistance is strong.
2. be used with the roll squeezer roll surface, long service life was not prone to the situation that fracture of post nail or fragmentation etc. influences the normal use of roll squeezer in working kind.
3. wear and tear synchronously with roll surface, realize the self-regeneration function of roll surface.
Improvement further is that in the said ball milling operation, the ball milling time calculates according to following formula
Ball milling time=ball milling fiducial time+[benchmark coercive force-(coarse granule WC sphere of powder mill coefficient * 60% among the coarse granule WC sphere of powder mill coefficient * 40%+)]/ball milling coefficient conversion value;
Said ball milling fiducial time is 16 hours; Said ball milling coefficient calculates according to following formula, i.e. the coercive force of ball milling coefficient=mensuration * (the cobalt magnetic of mensuration/benchmark cobalt magnetic), and benchmark cobalt magnetic is 9.50%.The ball milling coefficient of said coarse granule WC powder is 3.9-4.5 KA/m; The ball milling coefficient of coarse granule WC powder is 4.8-5.4 KA/m in said.Said benchmark coercive force is respectively 5.5KA/m or 6.5KA/m, and corresponding ball milling coefficient conversion value is respectively 0.20KA/m*h or 0.25KA/m*h.
In CEMENTED CARBIDE PRODUCTION, the uniformity of ball milling time and compound, granularity and final alloy grain size, performance are closely bound up.The ball milling time is too short, causes compound to mix, the ball milling overlong time, and the activity of powder increases, and alloy property becomes and is difficult to control.Accurately the control compound ball milling time is the important means that obtains preferable WC powder size distribution.Especially the WC of the duplex grain structure that adopts of the present invention; How between the WC powder of two kinds of crystal grain, to seek the ball milling time an of the best; Distributing thereby obtain best powder size, to improve the carbide alloy physical and mechanical properties, also is the problem that the present invention will make every effort to solve.The coercive force in the carbide alloy physical and mechanical properties and the cobalt content of alloy and institutional framework are closely related, can weigh the size of WC mean grain size; Cobalt magnetic is the mass fraction that can produce the cobalt of magnetic in the alloy, with cobalt content and carbon content confidential relation is arranged.Through a large amount of research and experiment; Obtained in the WC-Co carbide alloy with duplex grain structure of the present invention; Its coercive force, cobalt magnetic and the corresponding relation of ball milling time, through above-mentioned corresponding relation, the best ball milling time that can calculate every batch of carbide alloy mixture is 18-24 hour.Overcome in the existing CEMENTED CARBIDE PRODUCTION; Judge the big or small not accurate enough phenomenon of WC powder granularity with Fisher particle size; It is corresponding with WC powder granularity (Fisher particle size) to exist the ball milling time in the prior art, and once confirming just unified fixing shortcoming of back ball milling time.Because every batch of compound has all obtained the best ball milling time, prepared compound is used for CEMENTED CARBIDE PRODUCTION, and performance is preferable.
Figure of description
Fig. 1 is that the sample of compound 1 preparation amplifies 1500 times of metallurgical structure figure.
Fig. 2 is that the sample of compound 2 preparations amplifies 1500 times of metallurgical structure figure.
Fig. 3 is that the sample of compound 3 preparations amplifies 1500 times of metallurgical structure figure.
Fig. 4 is that the sample of compound 4 preparations amplifies 1500 times of metallurgical structure figure.
Fig. 5 is that the sample of compound 5 preparations amplifies 1500 times of metallurgical structure figure.
Fig. 6 is that the sample of compound 6 preparations amplifies 1500 times of metallurgical structure figure.
The specific embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Embodiment 1
A kind of being applicable to rolled ore class (hardness coefficient of rock f8-15) material with the preparation method of roll squeezer with the carbide alloy roll surface post nail of tooth, comprises the steps:
1, measure the ball milling coefficient:
Select six batches of coarse granule tungsten carbides and middle coarse granule tungsten carbide respectively, the copmbined-carbon of the tungsten carbide of two kinds of particles is 6.11%, and total carbon is 6.16%.Its Fisher particle size sees the following form 1.
Table 1
Six batches of coarse granule tungsten carbides and middle coarse granule tungsten carbide are mixed with six groups of each one kilogram of compounds with cobalt powder respectively, and every group of compound cobalt is 100g, tungsten carbide 900g.Six groups of one kilogram of compounds are respectively charged into the bead mill bucket of one liter of capacity.The ratio of grinding media to material 4:1 of mill ball quality and mixture quality in the ball milling bucket, the solid-to-liquid ratio 3:1 (kg/L) of mixture quality and ball-milling medium hexane volume, the mill ball diameter is 10mm, ball milling bucket rotating speed is 90 r/min. ball milling times to be 16 hours.
Six groups of compounds that mix are dry respectively; Be pressed into the A118 standard specimen; Put into the vacuum sintering furnace sintering, 1450 ℃ of sintering temperatures.
Measure the physical and mechanical properties of every group of compound sample, and calculate the ball milling coefficient such as the following table 2 of every batch of tungsten carbide.Wherein the computing formula of ball milling coefficient is following:
The coercive force of ball milling coefficient=mensuration * (the cobalt magnetic of mensuration/benchmark cobalt magnetic); Confirming of benchmark cobalt magnetic is that a plurality of specimen sample in the development process of the present invention are made an experiment after the contrast, confirm a preferable cobalt magnetic number value scope 9.0%-9.8%, and with the central value 9.50% of number range as benchmark cobalt magnetic value.
Table 2
2, batching: above-mentioned six batches of tungsten carbides and cobalt are mixed with three batches of compounds, and lot number is respectively 1,2, and 3.By the gross mass of joining compound, the mass percent of every batch of compound cobalt is 15%, and coarse granule tungsten carbide mass percent is 34%, and middle coarse granule tungsten carbide mass percent is 51%.The Fisher particle size (FSSS1) of the coarse granule tungsten carbide of every batch of compound employing is seen table 3 with the Fisher particle size (FSSS2) of middle coarse granule tungsten carbide.
Table 3
3, wet-milling: every batch of compound is added 600L tilting-type ball mill respectively.Ball load is about 2.5 tons, rotating speed 32r/min, and ratio of grinding media to material 4:1, solid-to-liquid ratio is 3:1 (kg/L), and wet grinding media is a hexane, and forming agent is a paraffin, and mass percent is 2% of a mixture quality, adds with solid-state mode before the ball milling.
The ball milling time is confirmed according to following formula:
Ball milling time=ball milling fiducial time+[benchmark coercive force-(coarse granule WC sphere of powder mill coefficient * 60% among the coarse granule WC sphere of powder mill coefficient * 40%+)]/ball milling coefficient conversion value;
Ball milling fiducial time is 16 hours; The benchmark coercive force is 5.5KA/m; Confirming of benchmark coercive force; Be with a plurality of specimen sample in the development process of the present invention make an experiment the contrast after; Confirm preferable coercive force number range 4.5 KA/m-6.5 KA/m, and with the central value 5.5KA/m of number range as the benchmark hc values.Ball milling coefficient conversion value is 0.20KA/m*h.According to the aforementioned calculation formula, calculate the ball milling time such as the following table 4 of every batch of compound:
Table 4
The tungsten carbide Fisher particle size of three batches of compounds is gathered like following table 5 with ball milling coefficient and ball milling time relation:
Table 5
4, drying and granulating: every batch of wet-milling compound finally obtains hollow ball shape sprills particle respectively through 300 type spray drying tower spray-dryings, and the powder of this form has good compression property with mobile.Apparent density of powder 2.90-3.30g/cm3,, flow velocity 36-38s/50g.
5, compression moulding: high compacting such as every batch of compound implementation, finally making does not respectively have the semi-finished product that the compacting defective has better Density Distribution.
6, sintering: sintering circuit is mainly divided and is removed forming agent, vacuum-sintering, pressure sintering three phases, and it is 4.5MPa that the pressure sintering stage is adopted pressure, and 1380 ℃ of the highest sintering temperatures finally obtain fine and close alloy blank.
To the carbide alloy sample censorship that three batches of carbide alloy mixtures that adopt above-mentioned technology prepare, its physical and mechanical properties is seen table 6, and institutional framework is seen accompanying drawing 1-3.
Table 6
It is applicable to that rolling ore class (hardness coefficient of rock f8-15) material uses tooth with roll squeezer the hard metal article that embodiment 1 is obtained.
Embodiment 2
A kind of being applicable to rolled ore class (hardness coefficient of rock f4-10) material with the preparation method of roll squeezer with the carbide alloy roll surface post nail of tooth, comprises the steps:
1, measure the ball milling coefficient:
Select six batches of coarse granule tungsten carbides and middle coarse granule tungsten carbide separately, the copmbined-carbon of tungsten carbide powder is 6.11%, and total carbon is 6.14%, and its Fisher particle size sees the following form 7.
Table 7
According to the step of embodiment 1, measure the physical and mechanical properties of six groups of compound samples that six batches of tungsten carbides form, and calculate the ball milling coefficient such as the following table 8 of every batch of tungsten carbide.
Table 8
2, batching: according to the proportioning process of embodiment 1 step 2, above-mentioned six batches of tungsten carbides and cobalt are mixed with three batches of compounds, lot number is respectively 4,5,6, and the every batch of compound sees the following form 9 with the configuration parameter of corresponding tungsten carbide.By the gross mass of joining compound, the mass percent of every batch of compound cobalt is 15%, and coarse granule tungsten carbide mass percent is 34%, and middle coarse granule tungsten carbide mass percent is 51%.The Fisher particle size (FSSS1) of the coarse granule tungsten carbide that adopts is seen table 9 with the Fisher particle size (FSSS2) of middle coarse granule tungsten carbide.
Table 9
3, wet-milling: with embodiment step 3.
Its ball milling fiducial time is 16 hours; The benchmark coercive force is 6.5KA/m; Ball milling coefficient conversion value is 0.25 KA/m*h.The ball milling Time Calculation formula listed according to embodiment 1 step 3 calculates the ball milling time such as the following table 10 of every batch of compound:
Table 10
The tungsten carbide Fisher particle size of three batches of compounds is gathered like following table with ball milling coefficient and ball milling time relation:
Table 11
4, drying and granulating: with embodiment 1.
5, compression moulding: with embodiment 1.
6, sintering: with embodiment 1.
To the carbide alloy sample censorship that three batches of carbide alloy mixtures that adopt above-mentioned technology prepare, its physical and mechanical properties is seen table 12, and institutional framework is seen accompanying drawing 4-6.
Table 12
The hard metal article tungsten carbide size that embodiment 2 is obtained distributes wide, and cobalt is evenly distributed mutually, does not have alloy defects such as cobalt gathering or WC gathering, is applicable to that rolling ore class (hardness coefficient of rock f4-10) material uses tooth with roll squeezer.
[0036]Show with embodiment 2 final alloy property and institutional frameworks from embodiment 1: though the raw material tungsten carbide there are differences at Fisher particle size, ball milling coefficient value, through in the wet-milling link to the accurate control of ball milling time, can well control the WC grain degree.Thereby elimination causes the influence to final alloy property because of materials variance.
The above is merely preferred embodiment of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the preparation method of a carbide alloy roll surface post nail comprises batching, wet-milling, drying and granulating, compression moulding, sintering circuit, it is characterized in that,
Said burden process: the mass percent of WC powder and Co powder is (85-90): (10～15);
Said WC powder by thick, in the WC powder of thick two kinds of granularities form, the copmbined-carbon of WC powder is at 6.11%-6.13%, total carbon is at 6.14-6.16%, and the Fisher particle size of coarse granule WC powder is (15～19) μ m; The Fisher particle size of middle coarse granule WC powder is (10～14) μ m; The mass ratio of coarse granule WC powder and middle coarse granule WC powder is 40: 60.
2. the preparation method of a carbide alloy roll surface post as claimed in claim 1 nail is characterized in that the ball milling time of said wet-milling operation calculates according to following formula:
Ball milling time=ball milling fiducial time+[benchmark coercive force-(coarse granule WC sphere of powder mill coefficient * 60% among the coarse granule WC sphere of powder mill coefficient * 40%+)]/ball milling coefficient conversion value;
Wherein ball milling fiducial time is 16 hours, and the benchmark coercive force is 5.5KA/m; The ball milling coefficient value of coarse granule WC powder is at 3.9-4.5KA/m; The ball milling coefficient value of middle coarse granule WC powder is at 4.8-5.4KA/m; Ball milling coefficient conversion value is 0.20KA/m*h.
3. the preparation method of a carbide alloy roll surface post as claimed in claim 2 nail is characterized in that the parameter in the said ball milling Time Calculation formula is following:
Ball milling fiducial time is 16 hours, and the benchmark coercive force is 6.5KA/m; The ball milling coefficient value of coarse granule WC powder is at 3.9-4.5KA/m; The ball milling coefficient value of middle coarse granule WC powder is at 4.8-5.4KA/m; Ball milling coefficient conversion value is 0.25KA/m*h.
4. the preparation method of a carbide alloy roll surface post as claimed in claim 1 nail, it is characterized in that said wet-milling working procedure parameter is following: the ball milling time is 18-21 hour.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104858433A (en) * | 2015-03-26 | 2015-08-26 | 中钢集团安徽天源科技股份有限公司 | Manufacturing method and application of magnetic hard alloy column nails |
| CN105074029A (en) * | 2013-02-11 | 2015-11-18 | 六号元素有限责任公司 | Cemented carbide material and method of making same |
| 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 |
| CN106591670A (en) * | 2016-12-14 | 2017-04-26 | 单麒铭 | Preparing method for WC-Co hard alloy used for road digging tooth |
| CN106591615A (en) * | 2016-12-14 | 2017-04-26 | 重庆莱斯五金制造有限公司 | Preparation method of mining hard alloy of ultra-thick mixcrystal structure |
| CN107557639A (en) * | 2017-09-27 | 2018-01-09 | 武汉新锐合金工具有限公司 | A kind of three-phase structure hard alloy and preparation method thereof |
| CN110877105A (en) * | 2019-11-18 | 2020-03-13 | 自贡硬质合金有限责任公司 | Manufacturing method of hard rolling teeth |
| CN113322405A (en) * | 2021-04-21 | 2021-08-31 | 自贡硬质合金有限责任公司 | Hard alloy with mixed crystal structure and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100348A (en) * | 1985-04-01 | 1986-08-27 | 中南工业大学 | Twin crystal optimization is than the method for making that is 2.2 tungsten-cobalt carbide alloy |
| JPS62112750A (en) * | 1985-11-13 | 1987-05-23 | Mitsubishi Metal Corp | Hot rolling roll of tungsten carbide-base sintered hard alloy |
| CN101845579A (en) * | 2010-06-28 | 2010-09-29 | 株洲钻石切削刀具股份有限公司 | Inhomogeneous hard alloy and preparation method thereof |
| CN101880809A (en) * | 2010-06-09 | 2010-11-10 | 株洲肯特硬质合金有限公司 | Hard alloy for spherical tooth drill bit suitable for welding processing |
-
2012
- 2012-04-30 CN CN2012101307910A patent/CN102699330A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100348A (en) * | 1985-04-01 | 1986-08-27 | 中南工业大学 | Twin crystal optimization is than the method for making that is 2.2 tungsten-cobalt carbide alloy |
| JPS62112750A (en) * | 1985-11-13 | 1987-05-23 | Mitsubishi Metal Corp | Hot rolling roll of tungsten carbide-base sintered hard alloy |
| CN101880809A (en) * | 2010-06-09 | 2010-11-10 | 株洲肯特硬质合金有限公司 | Hard alloy for spherical tooth drill bit suitable for welding processing |
| CN101845579A (en) * | 2010-06-28 | 2010-09-29 | 株洲钻石切削刀具股份有限公司 | Inhomogeneous hard alloy and preparation method thereof |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105074029A (en) * | 2013-02-11 | 2015-11-18 | 六号元素有限责任公司 | Cemented carbide material and method of making same |
| CN105074029B (en) * | 2013-02-11 | 2019-08-06 | 六号元素有限责任公司 | Cemented carbide material and preparation 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 |
| 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 |
| CN104858433A (en) * | 2015-03-26 | 2015-08-26 | 中钢集团安徽天源科技股份有限公司 | Manufacturing method and application of magnetic hard alloy column nails |
| CN104858433B (en) * | 2015-03-26 | 2017-01-18 | 中钢集团安徽天源科技股份有限公司 | Manufacturing method and application of magnetic hard alloy column nails |
| CN106591670A (en) * | 2016-12-14 | 2017-04-26 | 单麒铭 | Preparing method for WC-Co hard alloy used for road digging tooth |
| CN106591615A (en) * | 2016-12-14 | 2017-04-26 | 重庆莱斯五金制造有限公司 | Preparation method of mining hard alloy of ultra-thick mixcrystal structure |
| CN107557639A (en) * | 2017-09-27 | 2018-01-09 | 武汉新锐合金工具有限公司 | A kind of three-phase structure hard alloy and preparation method thereof |
| CN107557639B (en) * | 2017-09-27 | 2019-03-08 | 武汉新锐合金工具有限公司 | A kind of three-phase structure hard alloy and preparation method thereof |
| CN110877105A (en) * | 2019-11-18 | 2020-03-13 | 自贡硬质合金有限责任公司 | Manufacturing method of hard rolling teeth |
| CN113322405A (en) * | 2021-04-21 | 2021-08-31 | 自贡硬质合金有限责任公司 | Hard alloy with mixed crystal structure and preparation method thereof |
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Application publication date: 20121003 |