CN109396451A - A kind of production technology of machining hard alloy bar - Google Patents

A kind of production technology of machining hard alloy bar Download PDF

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Publication number
CN109396451A
CN109396451A CN201811561988.3A CN201811561988A CN109396451A CN 109396451 A CN109396451 A CN 109396451A CN 201811561988 A CN201811561988 A CN 201811561988A CN 109396451 A CN109396451 A CN 109396451A
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production technology
hard alloy
alloy bar
carbide
microns
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张利平
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Ganzhou Haisheng Hard Alloy Co Ltd
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Ganzhou Haisheng Hard Alloy Co Ltd
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    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • 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
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
    • 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
    • B22F2009/042—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling using a particular milling fluid
    • 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
    • B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Powder Metallurgy (AREA)

Abstract

The present invention relates to the production technology of new material, specially a kind of production technology of machining hard alloy bar, comprising the following steps: formula material includes superfine tungsten carbide, super-fine cobalt powder, chromium carbide, tantalum carbide and vanadium carbide；Auxiliary material includes paraffin and alcohol；Successively carry out wet powder-grinding, drying and granulating, compression moulding, blank finishing and pressure sintering.High rigidity, high intensity and high stability are had the following characteristics that using Ultra-fine Grained high-performance carbide bar prepared by present invention process, the coarse-fine processing of cutting of, difficulty of processing biggish sintered steel higher suitable for hardness and mould steel.

Description

A kind of production technology of machining hard alloy bar
Technical field
It is specifically a kind of to add for sintered steel, mould steel cutting the present invention relates to a kind of production technology of new material The production technology of the Ultra-fine Grained high-performance carbide bar of work.
Background technique
Sintered steel, mould steel are mainly used to manufacture the molds such as cold-punching mould, hot-forging die and compression mod, are widely used in machine The main machining tool of part is manufactured in the industrial departments such as tool manufacture, radio meter, motor, electric appliance, but due to its hardness height (HRC45-60), the features such as difficulty of processing is big, big to the loss of cutter in process makes its application by certain limit System.
The present invention is directed to research and develop a novel hard alloy for the high feature of sintered steel, mould steel difficulty of processing Cutting tool basis material --- Ultra-fine Grained high-performance carbide bar, to solve the above problems, that improves cutter uses the longevity Life improves the processing efficiency of material, improves machining accuracy, reduces cost.
Summary of the invention
The purpose of the present invention is to provide a kind of production technologies of machining hard alloy bar, make powder metallurgy Steel, mould steel machining become feasible, efficient, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme:
A kind of production technology of machining hard alloy bar, comprising the following steps:
1) formula design: formula material includes ultrafine tungsten carbide powder content 87.0%-88.5%, super-fine cobalt powder content 10.8%-12.5%, chromium carbide content 0.3%-0.6%, carbonization tantalum content 0.1%-0.4%, carbonization content of vanadium 0.1%- 0.4%；
2) auxiliary material: auxiliary material includes paraffin and alcohol；
3) wet powder-grinding: according to recipe requirements correct amount 2.0%-3.0% it is paraffin melting after be added to 600L and can incline Pre-grinding, eligible paths 1 required for correct amount are carried out in formula tumbling ball mill) raw material are put into ball mill, ingredients by weight It is 500-550kg/ batches, alcohol is added in the ratio of 0.20-0.40L/kg, carries out ball according to equipment regulation starting ball mill Mill, Ball-milling Time are 55-72 hours；
4) drying and granulating: by above-mentioned steps 3) obtained slurry vibrates wet screening with 325 mesh and is sieved, the material after sieving Slurry is contained in slurry stirred tank, granulation is dried to slurry using spray drying device, the mixture powder after drying is Spherical shape, average particle size are 80-100 microns；
5) compression moulding: by above-mentioned steps 4) obtained mixture is pressed；
6) blank is modified: by above-mentioned steps 5) obtained green compact modifies；
7) pressure sintering: by above-mentioned steps 6) resulting blank carries out pressure sintering, using degreasing pressure sintering all-in-one oven, Total dewaxing time control was at 10-15 hours, and final sintering temperature is 1400-1440 DEG C, and the 6-9MPa that pressurizes, dwell time 30- 60 minutes, sandblasting after cooling down, coming out of the stove；
8) performance detection: by above-mentioned steps 7) obtained sintering blank carries out performance detection, including density, cobalt magnetic, magnetic Power, hardness, intensity and metallographic.
As a further solution of the present invention: in step 1), ingredient requirement are as follows: the grain size 0.4-0.6 of tungsten carbide is micro- Rice, BET 2.2-2.5；Cobalt powder granularity is 0.75-0.85 microns；Chromium carbide granularity is 0.8-1.0 microns；Tantalum carbide granularity is 0.8-1.0 microns；Vanadium carbide granularity is 0.8-1.0 microns.
As a further solution of the present invention: in step 2), paraffin is 56-58 fully refined paraffin wax；What alcohol used It is high-purity industrial alcohol, purity is 99.50% or more.
As a further solution of the present invention: in step 5), being pressed using dry bag formula isostatic pressing machine, polyurethane mould Be made type, compression ratio 1.35-1.65, constriction coefficient 1.25-1.30, pressing pressure 90-120MPa, compacted products it is straight Diameter is 1.0-40 millimeters, and length is 300-350 millimeters.
As a further solution of the present invention: in step 6), green compact being carried out using vertical shaft lathe and end trimmer The finishing of radial and end face, radial trim amount are 1.5-2.5 millimeters, and end face trim amount is 5-15 millimeters.
As a further solution of the present invention: in step 8), specific detection performance index are as follows: density 14.10- 14.40g/cm3, cobalt magnetic 75%-90%, magnetic force 24.2-28.8KA/m, hardness HRA92.2-92.8, bending strength 3600- 4500N/mm2, within metallographic A02B00C00,0.5-0.6 microns of alloy grain degree.
Purposes of the production technology of the machining hard alloy bar in sintered steel production and processing.
Compared with prior art, the beneficial effects of the present invention are: it is hard using the Ultra-fine Grained high-performance of present invention process preparation Matter alloy bar material has the following characteristics that high rigidity, high intensity and high stability, is suitable for that hardness is higher, difficulty of processing is biggish The coarse-fine processing of the cutting of sintered steel and mould steel.
Detailed description of the invention
Fig. 1 is the stereoscan photograph at chinese raw materials super-fine cobalt powder end of the present invention.
The metallograph that Fig. 2 is 1500 times of ultra-fine cemented carbide in the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Problem to be solved by this invention be for sintered steel, mould steel unmanageable problem provide it is a kind of high hard The production work of degree, high-intensitive and high stability the hard alloy bar that coarse-fine processing is cut for sintered steel, mould steel Process, the work of the static pressure such as the main selection including raw material, the design of formula and optimization, the improvement of mixture, complete series bar The control etc. that skill research and degreasing pressurization are integrally sintered is finally completed the Ultra-fine Grained high-performance rigid conjunction for meeting processing service performance The production of golden bar.
A kind of production work for sintered steel, the Ultra-fine Grained high-performance carbide bar of mould steel machining Skill, comprising the following steps:
1) formula design: formula designed by the present invention includes ultrafine tungsten carbide powder content 87.0%-88.5%, ultra-fine cobalt Powder content 10.8%-12.5%, chromium carbide content 0.3%-0.6%, carbonization tantalum content 0.1%-0.4%, carbonization content of vanadium 0.1%-0.4%；
2) ingredient requirement: raw material of the present invention includes 0.4-0.6 microns of grain size of tungsten carbide, BET 2.2- 2.5, cobalt powder granularity is 0.75-0.85 microns, and chromium carbide granularity is 0.8-1.0 microns, and tantalum carbide granularity is 0.8-1.0 microns, Vanadium carbide granularity is 0.8-1.0 microns；
3) auxiliary material: the auxiliary material that the present invention uses includes paraffin and alcohol, and wherein paraffin is 56-58 full refining Paraffin, alcohol reach 99.50% or more using high-purity industrial alcohol, purity；
4) wet powder-grinding: according to recipe requirements correct amount 2.0%-3.0% it is paraffin melting after be added to 600L and can incline Pre-grinding is carried out in formula tumbling ball mill, qualification raw material required for correct amount are put into ball mill, ingredients by weight 500- 550kg/ batches, alcohol is added in the ratio of 0.20-0.40L/kg, carries out ball milling, ball according to equipment regulation starting ball mill Time consuming is 55-72 hours；
5) drying and granulating: by above-mentioned steps 4) obtained slurry vibrates wet screening with 325 mesh and is sieved, the material after sieving Slurry is contained in slurry stirred tank, granulation is dried to slurry using spray drying device, the mixture powder after drying is Spherical shape, average particle size are 80-100 microns；
6) compression moulding: by above-mentioned steps 5) obtained mixture is pressed, using dry bag formula isostatic pressing machine, Polyurethane mould is pressed, compression ratio 1.35-1.65, constriction coefficient 1.25-1.30, pressing pressure 90- 120MPa, the diameter of compacted products are 1.0-40 millimeters, 300-350 millimeters of length；
7) blank is modified: by above-mentioned steps 6) obtained green compact modifies, using vertical shaft lathe and end trimmer Radial direction and end face finishing are carried out to green compact, radial trim amount is 1.5-2.5 millimeters, and end face trim amount is 5-15 millimeters；
8) pressure sintering: by above-mentioned steps 7) resulting blank carries out pressure sintering, using degreasing pressure sintering all-in-one oven, Dewaxing technique is formulated according to product size size, at 10-15 hours, final sintering temperature was 1400- for total time control that dewaxes 1440 DEG C, and the 6-9MPa that pressurizes, dwell time 30-60 minute, sandblasting after cooling down, coming out of the stove；
9) performance detection: by above-mentioned steps 8) obtained sintering blank carries out performance detection, including density, cobalt magnetic, magnetic Power, hardness, intensity and metallographic etc., specific performance index are density 14.10-14.40g/cm3, cobalt magnetic control in 75%-90%, Magnetic force 24.2-28.8KA/m, hardness HRA92.2-92.8, bending strength 3600-4500N/mm2, within metallographic A02B00C00, 0.5-0.6 microns of alloy grain degree.
Embodiment 1
Please refer to Fig. 1~2, in the embodiment of the present invention, a kind of production technology of machining hard alloy bar, including Following steps:
1) formula designed by the present invention includes ultrafine tungsten carbide powder content 87.45%, super-fine cobalt powder content 11.8%, carbon Change chromium content 0.4%, carbonization tantalum content 0.2%, carbonization content of vanadium 0.15%；
2) granularity of raw material is selected are as follows: the BET of WC is 2.44, and cobalt powder granularity is 0.83 micron, and No. 58 fully refined paraffin wax add 2.35%, ingredients by weight 500kg are measured, Ball-milling Time 65 hours, discharging was simultaneously spray-dried, and produced the trade mark hard alloy Mixture；
3) mold of φ 4*330 and φ 8*330 is selected to suppress above-mentioned mixture on dry bag formula equal pressing equipment Molding, compression ratio 1.53, constriction coefficient 1.266 carry out outer diameter processing to green compact and end face process, and produce trade mark hard conjunction The compacting green compact of gold；
4) above-mentioned compacting green compact is sintered on the integrated sintering furnace of degreasing pressurization, the dewaxing time is 11 hours, is burnt Junction temperature is 1420 DEG C, keeps the temperature 60 minutes, and pressurize 8MPa, and hard alloy bar blank is produced in pressure maintaining furnace cooling in 30 minutes；
5) by above-mentioned hard alloy bar blank sample detection, testing result (average value) is density 14.27g/cm3, cobalt Magnetic 82.6%, magnetic force 26.3KA/m, hardness HRA92.6, intensity 3920N/mm2With metallographic A02B00C00.
Embodiment 2
Please refer to Fig. 1~2, in the embodiment of the present invention, a kind of production technology of machining hard alloy bar, including Following steps:
1) formula designed by the present invention includes ultrafine tungsten carbide powder content 87.60%, super-fine cobalt powder content 11.5%, carbon Change chromium content 0.5%, carbonization tantalum content 0.2%, carbonization content of vanadium 0.2%；
2) granularity of raw material is selected are as follows: the BET2.27 of WC, cobalt powder granularity are 0.79 micron, No. 58 fully refined paraffin wax, dosage 2.5%, ingredients by weight 500kg, Ball-milling Time 60 hours, discharging was simultaneously spray-dried, and it is mixed to produce the trade mark hard alloy Close material；
3) mold of φ 14*330 and φ 22*330 is selected to press above-mentioned mixture on dry bag formula equal pressing equipment Type, compression ratio 1.55 is made, constriction coefficient 1.262 carries out outer diameter processing to green compact and end face processes, produces the trade mark hard The compacting green compact of alloy；
4) above-mentioned compacting green compact being sintered on the integrated sintering furnace of degreasing pressurization, the dewaxing time is 14.5 hours, Sintering temperature is 1420 DEG C, keeps the temperature 60 minutes, and pressurize 8MPa, and hard alloy bar hair is produced in pressure maintaining furnace cooling in 30 minutes Base；
5) by above-mentioned hard alloy bar blank sample detection, testing result (average value) is density 14.23g/cm3, cobalt Magnetic 86.3%, magnetic force 25.8KA/m, hardness HRA92.3, intensity 3880N/mm2With metallographic A02B00C00.
Embodiment 3
Please refer to Fig. 1~2, in the embodiment of the present invention, a kind of production technology of machining hard alloy bar, including Following steps:
1) formula designed by the present invention includes ultrafine tungsten carbide powder content 87.80%, super-fine cobalt powder content 11.3%, carbon Change chromium content 0.5%, carbonization tantalum content 0.2%, carbonization content of vanadium 0.2%；
2) granularity of raw material is selected are as follows: the BET2.31 of WC, cobalt powder granularity are 0.82 micron, No. 57 fully refined paraffin wax, dosage 2.6%, ingredients by weight 520kg, Ball-milling Time 62 hours, discharging was simultaneously spray-dried, and it is mixed to produce the trade mark hard alloy Close material；
3) mold of φ 14*330 and φ 22*330 is selected to press above-mentioned mixture on dry bag formula equal pressing equipment Type, compression ratio 1.60 is made, constriction coefficient 1.275 carries out outer diameter processing to green compact and end face processes, produces the trade mark hard The compacting green compact of alloy；
4) above-mentioned compacting green compact is sintered on the integrated sintering furnace of degreasing pressurization, the dewaxing time is 15 hours, is burnt Junction temperature is 1430 DEG C, keeps the temperature 55 minutes, and pressurize 9MPa, and hard alloy bar blank is produced in pressure maintaining furnace cooling in 35 minutes；
5) by above-mentioned hard alloy bar blank sample detection, testing result (average value) is density 14.35g/cm3, cobalt Magnetic 85.8%, magnetic force 26.8KA/m, hardness HRA92.5, intensity 4100N/mm2With metallographic A02B00C00.
High rigidity, high-strength is had the following characteristics that using Ultra-fine Grained high-performance carbide bar prepared by present invention process Degree and high stability, the coarse-fine processing of cutting of, difficulty of processing biggish sintered steel higher suitable for hardness and mould steel.
The above are merely the preferred embodiment of the present invention, it is noted that for those skilled in the art, not Under the premise of being detached from present inventive concept, several modifications and improvements can also be made, these also should be considered as protection model of the invention It encloses, these all will not influence the effect and patent practicability that the present invention is implemented.

Claims (7)

1. a kind of production technology of machining hard alloy bar, which comprises the following steps:
1) formula design: formula material includes ultrafine tungsten carbide powder content 87.0%-88.5%, super-fine cobalt powder content 10.8%- 12.5%, chromium carbide content 0.3%-0.6%, carbonization tantalum content 0.1%-0.4%, carbonization content of vanadium 0.1%-0.4%；
2) auxiliary material: auxiliary material includes paraffin and alcohol；
3) wet powder-grinding: according to recipe requirements correct amount 2.0%-3.0% it is paraffin melting after be added to 600L tilting-type rolling Pre-grinding, eligible paths 1 required for correct amount are carried out in cylinder ball mill) raw material are put into ball mill, and ingredients by weight is 500-550kg/ batches, alcohol is added in the ratio of 0.20-0.40L/kg, carries out ball according to equipment regulation starting ball mill Mill, Ball-milling Time are 55-72 hours；
4) drying and granulating: by above-mentioned steps 3) obtained slurry vibrates wet screening with 325 mesh and is sieved, and the slurry after sieving is contained Entering into slurry stirred tank, granulation is dried to slurry using spray drying device, the mixture powder after drying is spherical shape, Average particle size is 80-100 microns；
5) compression moulding: by above-mentioned steps 4) obtained mixture is pressed；
6) blank is modified: by above-mentioned steps 5) obtained green compact modifies；
7) pressure sintering: by above-mentioned steps 6) resulting blank carries out pressure sintering, and it is total de- using degreasing pressure sintering all-in-one oven The control of wax time was at 10-15 hours, and final sintering temperature is 1400-1440 DEG C, and the 6-9MPa that pressurizes, dwell time 30-60 point Clock, sandblasting after cooling down, coming out of the stove；
8) performance detection: by above-mentioned steps 7) obtained sintering blank carries out performance detection, including it is density, cobalt magnetic, magnetic force, hard Degree, intensity and metallographic.
2. the production technology of machining hard alloy bar according to claim 1, which is characterized in that in step 1) In, ingredient requirement are as follows: 0.4-0.6 microns of the grain size of tungsten carbide, BET 2.2-2.5；Cobalt powder granularity is 0.75-0.85 microns； Chromium carbide granularity is 0.8-1.0 microns；Tantalum carbide granularity is 0.8-1.0 microns；Vanadium carbide granularity is 0.8-1.0 microns.
3. the production technology of machining hard alloy bar according to claim 1 or 2, which is characterized in that in step It is rapid 2) in, paraffin be 56-58 fully refined paraffin wax；For alcohol using high-purity industrial alcohol, purity is 99.50% or more.
4. the production technology of machining hard alloy bar according to claim 3, which is characterized in that in step 5) In, it is pressed using dry bag formula isostatic pressing machine, polyurethane mould, compression ratio 1.35-1.65, constriction coefficient is 1.25-1.30, pressing pressure 90-120MPa, the diameter of compacted products are 1.0-40 millimeters, and length is 300-350 millimeters.
5. the production technology of machining hard alloy bar according to claim 4, which is characterized in that in step 6) In, using vertical shaft lathe and end trimmer carries out radial direction to green compact and end face is modified, and radial trim amount is 1.5-2.5 millimeters, End face trim amount is 5-15 millimeters.
6. the production technology of machining hard alloy bar according to claim 5, which is characterized in that in step 8) In, specific detection performance index are as follows: density 14.10-14.40g/cm3, cobalt magnetic 75%-90%, magnetic force 24.2-28.8KA/m, firmly Spend HRA92.2-92.8, bending strength 3600-4500N/mm2, within metallographic A02B00C00, alloy grain degree 0.5-0.6 is micro- Rice.
7. the production technology of machining hard alloy bar as claimed in any one of claims 1 to 6 is raw in sintered steel Produce the purposes in processing.
CN201811561988.3A 2018-12-20 2018-12-20 A kind of production technology of machining hard alloy bar Pending CN109396451A (en)

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CN109957671A (en) * 2019-03-19 2019-07-02 自贡硬质合金有限责任公司 A kind of sintering cemented carbide technique
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
CN110923535A (en) * 2019-12-13 2020-03-27 株洲硬质合金集团有限公司 Hard alloy and preparation method and application thereof
CN110981488A (en) * 2019-12-24 2020-04-10 有研工程技术研究院有限公司 Ultrahigh-hardness aspheric glass lens mold material and preparation method thereof
CN111318692A (en) * 2020-04-16 2020-06-23 上海钨睿新材料科技有限公司 Cold isostatic pressing process for efficiently producing hard alloy bars
CN111515401A (en) * 2020-05-06 2020-08-11 江西中孚硬质合金股份有限公司 Hard alloy material for paper industry roller cutter, roller cutter blank preparation method and roller cutter blank
CN111545447A (en) * 2020-04-13 2020-08-18 河源泳兴硬质合金股份有限公司 Production process of hard alloy bar for cutting processing
CN111673089A (en) * 2020-05-18 2020-09-18 株洲天成金属激光高科有限公司 Hard alloy vertical needle injection molding process for microwave chip packaging
CN112024627A (en) * 2020-08-20 2020-12-04 株洲湘钨超硬材料有限公司 Superhard micropore wire drawing die embedded with steel sleeve and manufacturing method thereof
CN112853189A (en) * 2020-12-31 2021-05-28 株洲硬质合金集团有限公司 Submicron-crystalline hard alloy material and preparation method and application thereof
CN113441721A (en) * 2021-03-20 2021-09-28 株洲力洲硬质合金有限公司 Production method of hard alloy bar
CN114250396A (en) * 2021-11-19 2022-03-29 成都美奢锐新材料有限公司 Superfine low-cobalt hard alloy material for wood processing and preparation method thereof
CN118641424A (en) * 2024-08-14 2024-09-13 崇义章源钨业股份有限公司 Method for representing density distribution of hard alloy blank

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Publication number Priority date Publication date Assignee Title
CN109957671A (en) * 2019-03-19 2019-07-02 自贡硬质合金有限责任公司 A kind of sintering cemented carbide technique
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
CN110923535A (en) * 2019-12-13 2020-03-27 株洲硬质合金集团有限公司 Hard alloy and preparation method and application thereof
CN110981488A (en) * 2019-12-24 2020-04-10 有研工程技术研究院有限公司 Ultrahigh-hardness aspheric glass lens mold material and preparation method thereof
CN111545447A (en) * 2020-04-13 2020-08-18 河源泳兴硬质合金股份有限公司 Production process of hard alloy bar for cutting processing
CN111318692A (en) * 2020-04-16 2020-06-23 上海钨睿新材料科技有限公司 Cold isostatic pressing process for efficiently producing hard alloy bars
CN111515401A (en) * 2020-05-06 2020-08-11 江西中孚硬质合金股份有限公司 Hard alloy material for paper industry roller cutter, roller cutter blank preparation method and roller cutter blank
CN111673089A (en) * 2020-05-18 2020-09-18 株洲天成金属激光高科有限公司 Hard alloy vertical needle injection molding process for microwave chip packaging
CN112024627A (en) * 2020-08-20 2020-12-04 株洲湘钨超硬材料有限公司 Superhard micropore wire drawing die embedded with steel sleeve and manufacturing method thereof
CN112853189A (en) * 2020-12-31 2021-05-28 株洲硬质合金集团有限公司 Submicron-crystalline hard alloy material and preparation method and application thereof
CN113441721A (en) * 2021-03-20 2021-09-28 株洲力洲硬质合金有限公司 Production method of hard alloy bar
CN114250396A (en) * 2021-11-19 2022-03-29 成都美奢锐新材料有限公司 Superfine low-cobalt hard alloy material for wood processing and preparation method thereof
CN118641424A (en) * 2024-08-14 2024-09-13 崇义章源钨业股份有限公司 Method for representing density distribution of hard alloy blank

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Application publication date: 20190301