CN115652166B - Superhard hard alloy material for ultrahigh-pressure water jet knife and preparation method thereof - Google Patents
Superhard hard alloy material for ultrahigh-pressure water jet knife and preparation method thereof Download PDFInfo
- Publication number
- CN115652166B CN115652166B CN202211373766.5A CN202211373766A CN115652166B CN 115652166 B CN115652166 B CN 115652166B CN 202211373766 A CN202211373766 A CN 202211373766A CN 115652166 B CN115652166 B CN 115652166B
- Authority
- CN
- China
- Prior art keywords
- powder
- water jet
- sintering
- hard alloy
- pressure water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000956 alloy Substances 0.000 title claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 103
- 239000000463 material Substances 0.000 claims abstract description 62
- 238000005245 sintering Methods 0.000 claims abstract description 61
- 239000000203 mixture Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 55
- 229910002804 graphite Inorganic materials 0.000 claims description 55
- 239000010439 graphite Substances 0.000 claims description 55
- 229910045601 alloy Inorganic materials 0.000 claims description 46
- 238000000498 ball milling Methods 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 238000011049 filling Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 239000011812 mixed powder Substances 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 11
- 238000005488 sandblasting Methods 0.000 claims description 11
- 238000001291 vacuum drying Methods 0.000 claims description 11
- 238000004321 preservation Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 description 24
- 238000002490 spark plasma sintering Methods 0.000 description 13
- 238000005520 cutting process Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 8
- 238000011056 performance test Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000007656 fracture toughness test Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a hard alloy material for an ultrahigh-pressure water jet cutter, a preparation method thereof and the ultrahigh-pressure water jet cutter prepared from the hard alloy material. The cemented carbide material is prepared by SPS sintering a wc+a+b powder mixture comprising, based on 100wt.% of the total weight of the powder mixture: 98.0wt.% to 99.7wt.%, preferably 98.5wt.% to 99.5wt.% WC powder, 0.3wt.% to 2.0wt.%, preferably 0.5wt.% to 1.5wt.% a+b powder, wherein a is VC and B is TiC. The hard alloy material has high density, ultrahigh hardness, high strength and good processability, and can meet the use requirement of an ultrahigh pressure water jet cutter.
Description
Technical Field
The invention belongs to the field of powder metallurgy, relates to a superhard hard alloy material and a preparation method thereof, and application thereof, and in particular relates to a superhard hard alloy material for an ultrahigh-pressure water jet blade, a preparation method thereof, and an ultrahigh-pressure water jet blade prepared from the superhard hard alloy material.
Background
The high-pressure water jet cutting technology, which is also called a water jet cutter, is originally used in the fields of aerospace, military industry and the like in the United states, is favored because the physical and chemical properties of materials cannot be changed in cold cutting, is continuously improved and broken through, and is mixed with abrasive auxiliary cutting such as carborundum and the like in high-pressure water, so that the cutting speed and the maximum cutting thickness of the water jet cutter are greatly improved. At present, the water jet cutting is widely applied to a plurality of industries such as ceramics, stone, glass, metal, composite materials and the like, and some companies with advanced technology have perfected 3-axis and 4-axis water jet cutting equipment, and 5-axis water jet cutting equipment also tends to be mature.
The water jet technology is mainly characterized in that the water jet technology can carry out disposable cutting processing of arbitrary curves on materials, heat generated during cutting can be immediately taken away by water jet flowing at high speed, harmful substances are not generated, the materials have no thermal effect, the cut products do not need or are easy to carry out secondary processing, the water jet technology is safe and environment-friendly, has high speed and high efficiency, can realize the cutting processing of arbitrary curves, and is convenient and flexible and has wide application. The technology is classified into high-pressure type and low-pressure type according to pressure, and is generally classified into low-pressure type under 100MPa, high-pressure type under 100MPa, and super-pressure type under more than 400 MPa. The ultrahigh-pressure water jet knife is applied to processing of large-scale components such as national defense, military industry, aerospace and the like due to long service life and stronger cutting capability. However, the ultra-high pressure water jet blade has extremely high performance requirements on the water jet blade nozzle material, the hardness requirement on the commonly used ultra-high pressure water jet blade nozzle material is more than 2800HV, the hardness of the high-end ultra-high pressure nozzle material is more than 2900HV, and the material is required to have extremely high relative density, defects such as hole crack and the like, good processing performance and shock resistance. At present, autonomous development and production of the water jet nozzle material with the hardness of 2750 HV-2850 HV can be realized in China, but the technology breakthrough is not realized in China at present, and the high-end ultrahigh-pressure nozzle material mainly depends on import from countries such as Europe, america, the day and the like, is high in price, has long supply period and unstable in goods source, and severely restricts development of ultrahigh-pressure water jet equipment and application in China. Therefore, development of a preparation method for preparing a nozzle material for a high-end ultrahigh-pressure water jet knife is needed to break overseas monopoly and realize autonomous and controllable production in China.
Disclosure of Invention
The invention aims to overcome the defects of the prior researches and provide the hard alloy material for the ultrahigh-pressure water jet blade and the preparation method thereof.
According to a first aspect of the present invention, there is provided a cemented carbide material for an ultra-high pressure water jet, the cemented carbide material being prepared by SPS sintering of a wc+a+b powder mixture comprising, based on 100wt.% of the total weight of the powder mixture: 98.0wt.% to 99.7wt.%, preferably 98.5wt.% to 99.5wt.% WC powder, 0.3wt.% to 2.0wt.%, preferably 0.5wt.% to 1.5wt.% a+b powder, wherein a is VC and B is TiC.
Preferably, the content of a powder is 0wt.% to 2.0wt.%, more preferably 0wt.% to 1.5wt.%.
Preferably, the content of B powder is 0wt.% to 2.0wt.%, more preferably 0wt.% to 1.5wt.%.
Here, the a+b powder means a mixture of one or two selected from the group consisting of a powder and B powder.
Preferably, the cemented carbide material has a relative density of not less than 99.9%.
Preferably, the cemented carbide material contains no other impurity phases other than the main phase.
Preferably, the hardness of the cemented carbide material is 2850-2950 HV.
Preferably, the fracture toughness of the hard alloy material is 6.0MPa m 1/2 ～8.2MPa·m 1/2 More preferably 7.0 MPa.m 1/2 ～8.0MPa·m 1/2 。
According to a second aspect of the present invention, there is provided a method for preparing a cemented carbide material for an ultra-high pressure water jet blade according to the present invention, comprising the steps of:
1) Powder mixing: placing WC powder and A+B powder into a hard alloy ball milling tank for ball milling and mixing powder, and vacuum drying the obtained mixed powder, wherein the powder mixture comprises the following components in percentage by weight based on 100 weight percent of the mixed powder: 98.0wt.% to 99.7wt.% WC powder, 0.3wt.% to 2.0wt.% a+b powder, wherein a is VC and B is TiC;
2) And (5) die filling: placing the alloy powder obtained in the step 1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 5-20 MPa;
3) Sintering: placing the assembled graphite mold in an SPS system, setting the axial pressure to be 10-50 MPa, vacuumizing to be less than 10Pa, and electrifying and sintering; the heating rate is set to be 30-100 ℃/min, the sintering temperature is 1600-1800 ℃, and 1700-1800 ℃ is preferable; after preserving heat for 0-5 min, ending sintering, and cooling along with the furnace;
4) Sampling: and taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting to obtain the hard alloy material.
Preferably, the WC powder is a commercially pure phase powder having a purity of not less than 99.9% and a powder particle size of 0.1 to 1.0 μm.
Preferably, the VC powder is commercial pure phase powder with purity not lower than 99.9% and powder granularity of 0.1-1.0 μm.
Preferably, the TiC powder is commercial pure phase powder with purity not less than 99.9% and powder particle size of 0.1-1.0 μm.
Preferably, the WC powder is used in an amount of 98.5wt.% to 99.5wt.%; the addition ratio of (VC+TiC) is 0.5-1.5 wt.%.
Preferably, the mixed powder is placed in the center of the graphite mold.
Preferably, the graphite female die and the powder are separated by a graphite bushing, and the graphite pressing head and the powder are separated by a graphite sheet; and wrapping a layer of graphite felt for heat preservation around the assembled graphite mold.
Further preferably, the axial pressure is 10-20 MPa when the sintering temperature is less than or equal to 1400 ℃; pressurizing to 20-50 MPa, preferably 30-50 MPa, at a sintering temperature of more than 1400 ℃ and less than or equal to 1500 ℃; constant pressure sintering is carried out at the target pressure until the sintering is completed.
Preferably, in step 3), the rate of temperature increase is set to 30 to 80 ℃/min.
Preferably, the cemented carbide material obtained according to the method of the present invention has a relative density of not less than 99.9% and the bulk phase is free of other foreign phases than the main phase.
Preferably, the cemented carbide material obtained according to the method of the present invention has a hardness of 2850HV to 2950HV.
Preferably, the cemented carbide material obtained by the method according to the invention has a fracture toughness of 6.0 MPa-m 1 /2 ～8.2MPa·m 1/2 More preferably 7.0 MPa.m 1/2 ～8.0MPa·m 1/2 。
According to a third aspect of the invention, there is provided an ultra-high pressure water jet blade prepared from the cemented carbide material for an ultra-high pressure water jet blade according to the invention.
The invention has the following beneficial effects:
the preparation method of the hard alloy material for the ultrahigh-pressure water jet blade, provided by the invention, is characterized in that commercial WC powder, VC powder and TiC powder are used as raw materials to prepare the mixed powder, and then SPS technology is adopted to prepare the mixed powder.
Detailed Description
The present invention is further illustrated by the following examples, but embodiments of the present invention are not limited thereto.
In the following embodiment, firstly, a graphite bushing is matched with a graphite female die, then a lower pressing head is placed in the graphite female die, and a piece of graphite sheet is placed to be attached to the pressing head; then filling the mixed powder in proportion into a graphite female die; finally, sequentially placing the graphite sheets and an upper pressing head, and applying pre-pressure and pressure maintaining by using a hydraulic press; and after the work is finished, wrapping the die by using a high-temperature graphite felt. The graphite mold and ram dimensions are determined by the sample size to be prepared.
The spark plasma sintering systems used in the examples described below were from Japanese SINTER LAND company under the model numbers LABOX-350 and LABOX-6020. Spark Plasma Sintering (SPS) includes pulse energized pressure sintering, electric field assisted sintering, pulsed current rapid sintering, and the like. It should be noted that sintering of superhard cemented carbide materials for ultra-high pressure water knives using other manufacturer and model equipment using the methods of the present invention are also within the scope of the present invention.
The density results in the following examples were measured using an archimedes drainage method;
the hardness test is obtained by using a Vickers hardness tester, and the average value of 5-10 tests is taken as a final result; fracture toughness test the total length of four cracks at the tip of an indentation was measured and calculated in accordance with international standard ISO 28079-2009, hardmetals-Palmqvist toughness test, and fracture toughness K was calculated in combination with the vickers hardness value of the sample under the indentation IC 。
Example 1
The superhard hard alloy block material for the ultra-high pressure water jet knife with phi 80mm multiplied by 10mm is prepared according to the following steps, wherein WC, VC, tiC=98.5:1.0:0.5:
1) Powder mixing: the powder weighed according to the weight ratio is put into a hard alloy ball milling tank for ball milling, wherein 800g of the powder is weighed according to the weight ratio. Wherein the abrasive is hard alloy ball, the ball-material ratio is 5:1, the ball milling rotating speed is 300r/min, and the ball milling time is 24 hours. And carrying out high-temperature vacuum drying on the powder after ball milling, wherein the drying temperature is 80 ℃ and the drying time is 24 hours.
2) And (5) die filling: and (3) placing the alloy powder obtained after the drying in the step (1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 10MPa.
3) Sintering: placing the assembled graphite mold in an SPS sintering system, setting the axial initial pressure to be 20MPa, vacuumizing to be less than 10Pa, and starting to electrify and sinter; the heating rate is set to be 50 ℃/min, and the sintering temperature is 1750 ℃; and (5) after the heat preservation is carried out for 0min, ending sintering, and cooling along with the furnace. Wherein when the temperature reached 1400 ℃, the pressure was increased to 40MPa.
4) Sampling, taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting treatment to obtain the superhard hard alloy block material for the ultrahigh pressure water jet knife, wherein the specific performance parameters are shown in table 1.
Table 1: results of Performance test of cemented carbide Material prepared in example 1
Example 2
A superhard hard alloy block material for an ultrahigh pressure water jet cutter with phi 50m multiplied by 60mm is prepared according to the following steps, wherein WC: VC: tiC=98.5:1.5:0.0
1) Powder mixing: putting 2000g of the weighed composite powder into a hard alloy ball milling tank for ball milling. Wherein the abrasive is hard alloy ball, the ball-material ratio is 5:1, the ball milling rotating speed is 300r/min, and the ball milling time is 24 hours. And carrying out high-temperature vacuum drying on the powder after ball milling, wherein the drying temperature is 80 ℃ and the drying time is 36h.
2) And (5) die filling: and (3) placing the alloy powder obtained after the drying in the step (1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 10MPa.
3) Sintering: placing the assembled graphite mold in an SPS sintering system, setting the axial initial pressure to be 10MPa, vacuumizing to be less than 10Pa, and starting to electrify and sinter; the temperature rising rate is set to be 30 ℃/min, and the sintering temperature is set to be 1700 ℃; and (5) after the heat preservation is carried out for 1min, ending sintering, and cooling along with the furnace. Wherein when the temperature reached 1400 ℃, the pressure was increased to 50MPa.
4) Sampling, taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting treatment to obtain the superhard hard alloy block material for the ultrahigh pressure water jet knife, wherein the specific performance parameters are shown in table 2.
Table 2: results of Performance test of cemented carbide Material prepared in example 2
Example 3
A superhard hard alloy block material for an ultrahigh pressure water jet cutter with phi of 100m multiplied by 30mm is prepared according to the following steps, wherein WC: VC: tiC=99.0:0.5:0.5
1) Powder mixing: putting 3800g of the weighed composite powder into a hard alloy ball milling tank for ball milling. Wherein the abrasive is a hard alloy ball, the ball-material ratio is 4:1, the ball milling rotating speed is 200r/min, and the ball milling time is 48h. And carrying out high-temperature vacuum drying on the powder after ball milling, wherein the drying temperature is 80 ℃ and the drying time is 48 hours.
2) And (5) die filling: and (3) placing the alloy powder obtained after the drying in the step (1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 10MPa.
3) Sintering: placing the assembled graphite mold in an SPS sintering system, setting the axial initial pressure to be 20MPa, vacuumizing to be less than 10Pa, and starting to electrify and sinter; the heating rate is set to be 30 ℃/min, and the sintering temperature is 1720 ℃; and (5) after the heat preservation is carried out for 3min, ending sintering, and cooling along with the furnace. Wherein when the temperature reached 1400 ℃, the pressure was increased to 30MPa.
4) Sampling, taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting treatment to obtain the superhard hard alloy block material for the ultrahigh-pressure water knife, wherein the specific performance parameters are shown in table 3.
Table 3: results of Performance test of cemented carbide Material prepared in example 3
Example 4
The superhard hard alloy block material for the ultra-high pressure water jet knife with phi 80mm multiplied by 10mm is prepared according to the following steps, wherein WC, VC, tiC=98:1.0:1.0:
1) Powder mixing: the powder weighed according to the weight ratio is put into a hard alloy ball milling tank for ball milling, wherein 800g of the powder is weighed according to the weight ratio. Wherein the abrasive is hard alloy ball, the ball-material ratio is 5:1, the ball milling rotating speed is 300r/min, and the ball milling time is 24 hours. And carrying out high-temperature vacuum drying on the powder after ball milling, wherein the drying temperature is 80 ℃ and the drying time is 24 hours.
2) And (5) die filling: and (3) placing the alloy powder obtained after the drying in the step (1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 10MPa.
3) Sintering: placing the assembled graphite mold in an SPS sintering system, setting the axial initial pressure to be 20MPa, vacuumizing to be less than 10Pa, and starting to electrify and sinter; the temperature rising rate is set to be 50 ℃/min, and the sintering temperature is set to be 1700 ℃; and (5) after the heat preservation is carried out for 0min, ending sintering, and cooling along with the furnace. Wherein when the temperature reached 1400 ℃, the pressure was increased to 40MPa.
4) Sampling, taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting treatment to obtain the superhard hard alloy block material for the ultrahigh pressure water jet knife, wherein the specific performance parameters are shown in table 4.
Table 4: results of Performance test of cemented carbide Material prepared in example 4
Example 5
The superhard hard alloy block material for the ultra-high pressure water jet knife with phi 80mm multiplied by 10mm is prepared according to the following steps, wherein WC, VC, tiC=98.5, 0.0, 1.5:
1) Powder mixing: putting 800g of the powder weighed according to the weight ratio into a hard alloy ball milling tank for ball milling. Wherein the abrasive is hard alloy ball, the ball-material ratio is 5:1, the ball milling rotating speed is 300r/min, and the ball milling time is 24 hours. And carrying out high-temperature vacuum drying on the powder after ball milling, wherein the drying temperature is 80 ℃ and the drying time is 24 hours.
2) And (5) die filling: and (3) placing the alloy powder obtained after the drying in the step (1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 10MPa.
3) Sintering: placing the assembled graphite mold in an SPS sintering system, setting the axial initial pressure to be 20MPa, vacuumizing to be less than 10Pa, and starting to electrify and sinter; the heating rate is set to be 50 ℃/min, and the sintering temperature is set to be 1800 ℃; and (5) after the heat preservation is carried out for 0min, ending sintering, and cooling along with the furnace. Wherein when the temperature reached 1400 ℃, the pressure was increased to 40MPa.
4) Sampling, taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting treatment to obtain the superhard hard alloy block material for the ultrahigh pressure water jet knife, wherein the specific performance parameters are shown in table 5.
Table 5: results of Performance test of cemented carbide Material prepared in example 5
Example 6
The superhard hard alloy block material for the ultra-high pressure water jet knife with phi 80mm multiplied by 10mm is prepared according to the following steps, wherein WC, VC, tiC=99.6, 0.2:
1) Powder mixing: the powder weighed according to the weight ratio is put into a hard alloy ball milling tank for ball milling, wherein 800g of the powder is weighed according to the weight ratio. Wherein the abrasive is hard alloy ball, the ball-material ratio is 5:1, the ball milling rotating speed is 300r/min, and the ball milling time is 24 hours. And carrying out high-temperature vacuum drying on the powder after ball milling, wherein the drying temperature is 80 ℃ and the drying time is 24 hours.
2) And (5) die filling: and (3) placing the alloy powder obtained after the drying in the step (1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 10MPa.
3) Sintering: placing the assembled graphite mold in an SPS sintering system, setting the axial initial pressure to be 20MPa, vacuumizing to be less than 10Pa, and starting to electrify and sinter; the heating rate is set to be 50 ℃/min, and the sintering temperature is 1750 ℃; and (5) after the heat preservation is carried out for 0min, ending sintering, and cooling along with the furnace. Wherein when the temperature reached 1400 ℃, the pressure was increased to 40MPa.
4) Sampling, taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting treatment to obtain the superhard hard alloy block material for the ultrahigh pressure water jet knife, wherein the specific performance parameters are shown in table 6.
Table 6: results of Performance test of cemented carbide Material prepared in example 6
Comparative example 1
The superhard hard alloy block material for the ultra-high pressure water jet knife with phi 80mm multiplied by 10mm is prepared according to the following steps, wherein WC, VC, tiC=97.5:1.0:1.5:
1) Powder mixing: putting 800g of the powder weighed according to the weight ratio into a hard alloy ball milling tank for ball milling. Wherein the abrasive is hard alloy ball, the ball-material ratio is 5:1, the ball milling rotating speed is 300r/min, and the ball milling time is 24 hours. And carrying out high-temperature vacuum drying on the powder after ball milling, wherein the drying temperature is 80 ℃ and the drying time is 24 hours.
2) And (5) die filling: and (3) placing the alloy powder obtained after the drying in the step (1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 10MPa.
3) Sintering: placing the assembled graphite mold in an SPS sintering system, setting the axial initial pressure to be 20MPa, vacuumizing to be less than 10Pa, and starting to electrify and sinter; the heating rate is set to be 50 ℃/min, and the sintering temperature is 1750 ℃; and (5) after the heat preservation is carried out for 0min, ending sintering, and cooling along with the furnace. Wherein when the temperature reached 1400 ℃, the pressure was increased to 40MPa.
4) Sampling, taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting treatment to obtain the superhard hard alloy block material for the ultrahigh pressure water jet knife, wherein the specific performance parameters are shown in table 7.
Table 7: results of performance test of cemented carbide material prepared in comparative example 1
Comparative example 2
The superhard hard alloy block material for the ultra-high pressure water jet knife with phi 80mm multiplied by 10mm is prepared according to the following steps, wherein WC, VC, tiC=97.0:1.5:1.5:
1) Powder mixing: the powder weighed according to the weight ratio is put into a hard alloy ball milling tank for ball milling, wherein 800g of the powder is weighed according to the weight ratio. Wherein the abrasive is hard alloy ball, the ball-material ratio is 5:1, the ball milling rotating speed is 300r/min, and the ball milling time is 24 hours. And carrying out high-temperature vacuum drying on the powder after ball milling, wherein the drying temperature is 80 ℃ and the drying time is 24 hours.
2) And (5) die filling: and (3) placing the alloy powder obtained after the drying in the step (1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 10MPa.
3) Sintering: placing the assembled graphite mold in an SPS sintering system, setting the axial initial pressure to be 20MPa, vacuumizing to be less than 10Pa, and starting to electrify and sinter; the heating rate is set to be 50 ℃/min, and the sintering temperature is set to be 1500 ℃; and (5) after the heat preservation is carried out for 0min, ending sintering, and cooling along with the furnace. Wherein when the temperature reached 1400 ℃, the pressure was increased to 40MPa.
4) Sampling, taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting treatment to obtain the superhard hard alloy block material for the ultrahigh pressure water jet knife, wherein the specific performance parameters are shown in table 8.
Table 8: results of performance test of cemented carbide material prepared in comparative example 2
Claims (15)
1. A hard alloy material for an ultra-high pressure water jet knife, wherein,
the cemented carbide material is prepared by SPS sintering a wc+a+b powder mixture comprising, based on 100wt.% of the total weight of the powder mixture:
98.0wt.% to 99.7wt.% WC powder,
0.3wt.% to 2.0wt.% of an a+b powder, wherein,
a is VC, B is TiC,
the hard alloy material for the ultrahigh-pressure water jet knife is prepared by a method comprising the following steps of:
1) Powder mixing: placing WC powder and A+B powder into a hard alloy ball milling tank for ball milling and mixing powder, and vacuum drying the obtained mixed powder, wherein the powder mixture comprises the following components in percentage by weight based on 100 weight percent of the mixed powder: 98.0wt.% to 99.7wt.% WC powder, 0.3wt.% to 2.0wt.% a+b powder, wherein a is VC and B is TiC;
2) And (5) die filling: placing the alloy powder obtained in the step 1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 5-20 MPa;
3) Sintering: placing the assembled graphite mold in an SPS system, setting the axial pressure to be 10-50 MPa, vacuumizing to be less than 10Pa, and electrifying and sintering; the temperature rising rate is set to be 30-100 ℃/min, and the sintering temperature is set to be 1600-1800 ℃; after preserving heat for 0-5 min, ending sintering, and cooling along with the furnace;
4) Sampling: and taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting to obtain the hard alloy material.
2. The cemented carbide material for an ultra-high pressure water jet blade according to claim 1, wherein,
the powder mixture comprises: 98.5wt.% to 99.5wt.% WC powder,
0.5wt.% to 1.5wt.% of a+b powder.
3. The cemented carbide material for an ultra-high pressure water jet blade according to claim 1, wherein,
the relative density of the hard alloy material is not lower than 99.9%.
4. The cemented carbide material for an ultra-high pressure water jet blade according to claim 1 or 2, wherein,
the hardness of the hard alloy material is 2850 HV-2950 HV.
5. The cemented carbide material for an ultra-high pressure water jet blade according to claim 1 or 2, wherein,
the fracture toughness of the hard alloy material is 6.0MPa m 1/2 ～8.2MPa·m 1/2 。
6. The cemented carbide material for an ultra-high pressure water jet blade according to claim 5, wherein 7.0 MPa-m 1/2 ～8.0MPa·m 1/2 。
7. The method for producing a cemented carbide material for an ultra-high pressure water jet blade according to any one of claims 1 to 6, comprising the steps of:
1) Powder mixing: placing WC powder and A+B powder into a hard alloy ball milling tank for ball milling and mixing powder, and vacuum drying the obtained mixed powder, wherein the powder mixture comprises the following components in percentage by weight based on 100 weight percent of the mixed powder: 98.0wt.% to 99.7wt.% WC powder, 0.3wt.% to 2.0wt.% a+b powder, wherein a is VC and B is TiC;
2) And (5) die filling: placing the alloy powder obtained in the step 1) into a graphite female die, and prepressing by adopting a hydraulic press, wherein the prepressing pressure is 5-20 MPa;
3) Sintering: placing the assembled graphite mold in an SPS system, setting the axial pressure to be 10-50 MPa, vacuumizing to be less than 10Pa, and electrifying and sintering; the temperature rising rate is set to be 30-100 ℃/min, and the sintering temperature is set to be 1600-1800 ℃; after preserving heat for 0-5 min, ending sintering, and cooling along with the furnace;
4) Sampling: and taking out the sample by using a hydraulic press, and removing graphite on the surface of the sample by adopting sand blasting to obtain the hard alloy material.
8. The method of claim 7, wherein,
the sintering temperature in the step 3) is 1700-1800 ℃.
9. The method of claim 7, wherein,
the purity of the WC powder is not lower than 99.9%, and the granularity of the powder is 0.1-1.0 mu m;
the purity of the VC powder is not lower than 99.9%, and the granularity of the powder is 0.1-1.0 mu m;
the purity of the TiC powder is not lower than 99.9%, and the granularity of the TiC powder is 0.1-1.0 mu m.
10. The method of claim 7, wherein,
the mixed powder is placed in the center of the graphite mold.
11. The method of claim 7, wherein,
the graphite female die is separated from the powder by a graphite bushing, and the graphite pressing head is separated from the powder by a graphite sheet; and wrapping a layer of graphite felt for heat preservation around the assembled graphite mold.
12. The method of claim 7, wherein,
when the sintering temperature is less than or equal to 1400 ℃, the axial pressure is 10-20 MPa; pressurizing to 20-50 MPa when the sintering temperature is more than 1400 ℃ and less than or equal to 1500 ℃; constant pressure sintering is carried out at the target pressure until the sintering is completed.
13. The method of claim 12, wherein,
and pressurizing to 30-50 MPa when the sintering temperature is more than 1400 ℃ and less than or equal to 1500 ℃.
14. The method of claim 7, wherein,
in the step 3), the temperature rising rate is set to be 30-80 ℃/min.
15. An ultra-high pressure water jet blade produced from the cemented carbide material for an ultra-high pressure water jet blade according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211373766.5A CN115652166B (en) | 2022-11-04 | 2022-11-04 | Superhard hard alloy material for ultrahigh-pressure water jet knife and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211373766.5A CN115652166B (en) | 2022-11-04 | 2022-11-04 | Superhard hard alloy material for ultrahigh-pressure water jet knife and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115652166A CN115652166A (en) | 2023-01-31 |
| CN115652166B true CN115652166B (en) | 2024-03-08 |
Family
ID=84995174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211373766.5A Active CN115652166B (en) | 2022-11-04 | 2022-11-04 | Superhard hard alloy material for ultrahigh-pressure water jet knife and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115652166B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924144A (en) * | 2014-04-09 | 2014-07-16 | 中南大学 | Preparation method of unbonded-phase ultrafine WC hard alloy |
| CN109434122A (en) * | 2018-12-04 | 2019-03-08 | 燕山大学 | Without metallic binding phase Talide composite material and preparation method |
| CN113620713A (en) * | 2021-09-07 | 2021-11-09 | 燕山大学 | WC/VCxHard material, method for the production thereof and use thereof |
| CN115138849A (en) * | 2022-06-02 | 2022-10-04 | 湖南科技大学 | Preparation method of binderless hard alloy cutter material |
| CN115231953A (en) * | 2022-07-22 | 2022-10-25 | 燕山大学 | Hard alloy matrix ceramic composite material and preparation method thereof |
-
2022
- 2022-11-04 CN CN202211373766.5A patent/CN115652166B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924144A (en) * | 2014-04-09 | 2014-07-16 | 中南大学 | Preparation method of unbonded-phase ultrafine WC hard alloy |
| CN109434122A (en) * | 2018-12-04 | 2019-03-08 | 燕山大学 | Without metallic binding phase Talide composite material and preparation method |
| CN113620713A (en) * | 2021-09-07 | 2021-11-09 | 燕山大学 | WC/VCxHard material, method for the production thereof and use thereof |
| CN115138849A (en) * | 2022-06-02 | 2022-10-04 | 湖南科技大学 | Preparation method of binderless hard alloy cutter material |
| CN115231953A (en) * | 2022-07-22 | 2022-10-25 | 燕山大学 | Hard alloy matrix ceramic composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| Ｖ Ｃ、Ｔ ｉ Ｃ对无粘结相碳化钨基硬质合金摩擦磨损性能影响的研究;陈林波 等;稀有金属与硬质合金;第47卷(第1期);第74-79页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115652166A (en) | 2023-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10259751B2 (en) | Tungsten carbide-cubic boron nitride composite material and preparation method thereof | |
| CN108624772B (en) | Ultra-fine grain tungsten carbide-based hard alloy material and preparation method thereof | |
| CN104609865A (en) | Preparation method of silicon nitride-based conductive ceramic and molding method of silicon nitride-based conductive ceramic cutting tool | |
| CN106083065B (en) | A kind of high-performance Si3N4-TiC0.5N0.5Complex gradient ceramic cutting tool material and preparation method thereof | |
| CN104876598A (en) | Max phase-boron nitride composite ceramic side seal plate for thin-strip casting and manufacturing method of Max phase-boron nitride composite ceramic side seal plate | |
| CN110468320B (en) | High-hardness and high-toughness metal ceramic and preparation method and application thereof | |
| CN107052476A (en) | A kind of low damage processing technology of Continuous Fiber Reinforced Ceramic Matrix Composites screw thread | |
| CN107244918B (en) | TiB-TiC-TiB2-B4Rapid preparation method of C-Al composite ceramic | |
| CN112266251B (en) | Preparation method of silicon nitride/titanium carbide ceramic material based on spark plasma sintering | |
| CN104630529A (en) | Fine-grained WC-Co hard alloy taking B4C as dispersion strengthening additive and preparation method thereof | |
| CN110818428A (en) | Preparation method of eutectic reinforced toughened silicon nitride ceramic | |
| CN110735075A (en) | Preparation method of WC-based hard alloys with high wear resistance | |
| CN104131208A (en) | Aluminium oxide-titanium carbide micron composite ceramic cutter material and microwave sintering method thereof | |
| CN1271004C (en) | Sintering process of superfine pure WC without adhering phase | |
| CN104402448B (en) | Preparation method of non-pressure silicon carbide bearing balls | |
| CN107500776B (en) | Polycrystalline cubic boron nitride cutter material and preparation method thereof | |
| CN109354504B (en) | Boron carbide-based composite ceramic sintering aid and sintering process | |
| CN115652166B (en) | Superhard hard alloy material for ultrahigh-pressure water jet knife and preparation method thereof | |
| CN108220734B (en) | Raw material powder for producing cermet and method for producing cermet | |
| CN111515404B (en) | Preparation method of cBN/Al composite material | |
| CN111778436B (en) | Method for preparing WC-Y2O3 binderless hard alloy by cold pressing-hot pressing sintering | |
| CN113336554A (en) | Water jet sand pipe raw material, water jet sand pipe preparation method and water jet sand pipe | |
| CN109811235B (en) | High-wear-resistance hard alloy material and preparation method and application thereof | |
| CN112919915A (en) | Method for pressing silicon nitride ceramic special-shaped cutter by SPS pressure sintering powder | |
| CN114835496B (en) | Cr (chromium) 3 C 2 Preparation method of block material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |