CN110964965A - High-entropy alloy binding phase tungsten carbide hard alloy for water jet cutter and preparation method thereof - Google Patents
High-entropy alloy binding phase tungsten carbide hard alloy for water jet cutter and preparation method thereof Download PDFInfo
- Publication number
- CN110964965A CN110964965A CN201911359542.7A CN201911359542A CN110964965A CN 110964965 A CN110964965 A CN 110964965A CN 201911359542 A CN201911359542 A CN 201911359542A CN 110964965 A CN110964965 A CN 110964965A
- Authority
- CN
- China
- Prior art keywords
- powder
- hard alloy
- tungsten carbide
- alloy
- entropy alloy
- 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.)
- Pending
Links
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention belongs to the technical field of hard alloy, and discloses a high-entropy alloy binding phase tungsten carbide hard alloy for a water jet cutter and a preparation method thereof. The high-entropy alloy bonding phase tungsten carbide hard alloy takes high-entropy alloy as a bonding phase and takes tungsten carbide as a hard phase; the high-entropy alloy comprises at least five elements of Al, Co, Cr, Cu, Fe and Ni, wherein the atomic percentage of each element is 5-35%, and the mass percentage of the high-entropy alloy in the high-entropy alloy binding phase tungsten carbide hard alloy is 0.2-1%. The method comprises the following steps: mixing the high-entropy alloy powder with WC powder, and carrying out HPS hot-pressing sintering molding to obtain the high-entropy alloy binding phase tungsten carbide hard alloy. The tungsten carbide hard alloy has fine crystal grains and good comprehensive mechanical property.
Description
Technical Field
The invention relates to the technical field of hard alloys, in particular to a high-entropy alloy binding phase tungsten carbide hard alloy for a water jet cutter and a preparation method thereof.
Background
The sand pipe of the water jet cutter is also called a nozzle and a spray pipe, and is the key point for forming high-pressure water jet by the water jet cutter.
The sand pipe is washed by the high-speed abrasive particles, so the raw material for preparing the water jet cutter must have high hardness and high wear resistance.
Tungsten carbide cemented carbide is often chosen for the manufacture of water jet sand tubes due to its high hardness, good wear resistance and fracture toughness.
Currently, cemented carbides are mainly prepared from a hard phase and a binder phase by a powder metallurgy process.
The most commonly used binder phase is still Co metal, however, Co metal has high price and has magnetism and certain toxicity, so that the development of a novel metal binder phase for replacing Co also becomes an important research direction in the field of tungsten carbide hard alloy.
On the other hand, the binder phase can promote the sintering densification process of the alloy, endow the alloy with strength and toughness, and simultaneously reduce the hardness and wear resistance of the alloy. Thereby limiting its application in the water jet cutting field. The melting point of pure tungsten carbide is as high as 2860 ℃, the sintering temperature required for preparing fully densified binderless hard alloy is very high and often higher than 1600 ℃, the industrial production cost is greatly increased, and the phenomenon of abnormal growth of crystal grains can occur in the sintering process, so that a small amount of binding phase is added into the tungsten carbide, the sintering temperature is reduced, and simultaneously, compared with the traditional hard alloy, the hardness and the wear resistance of the material are improved, and the method becomes a new idea for preparing the hard alloy for the water jet cutter.
In order to improve the comprehensive performance of the tungsten carbide hard alloy, the tungsten carbide hard alloy has the capability of meeting the use requirement of the water jet cutting sand pipe and reducing the cost, and the tungsten carbide hard alloy is the direction explored by the technical personnel in the field.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provides a high-entropy alloy binding phase tungsten carbide hard alloy for a water jet cutter and a preparation method thereof. The invention provides a method for preparing tungsten carbide hard alloy with good comprehensive performance by adding a small amount of high-entropy alloy binding phase and adopting a HPS rapid hot-pressing sintering technology. The use requirement of the water jet sand pipe can be met, and meanwhile, the process cost is reduced.
The invention is realized by the following technical scheme:
a method for preparing (low-content) high-entropy alloy binding phase tungsten carbide hard alloy for water jet cutting adopts high-entropy alloy as a binding phase and tungsten carbide (WC) as a hard phase; the mass percentage of the high-entropy alloy in the high-entropy alloy binding phase tungsten carbide hard alloy is 0.2-1%. The high-entropy alloy comprises at least five elements of Al, Co, Cr, Cu, Fe and Ni, and the atomic percentage of each element is 5-35%.
The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy comprises the steps of mixing high-entropy alloy powder and WC powder, and then carrying out rapid hot-pressing sintering molding to obtain the high-entropy alloy binding phase tungsten carbide hard alloy; the method specifically comprises the following steps:
uniformly mixing Al, Co, Cr, Cu, Fe and Ni powder according to a ratio, and performing ball milling to obtain high-entropy alloy powder; the ball milling is carried out in an inert atmosphere, wherein the inert atmosphere is argon; the ball milling refers to dry milling and then wet milling, and drying is needed after wet milling;
mixing the high-entropy alloy powder and the WC powder uniformly, ball-milling and sieving to obtain a mixture;
the ball milling is carried out in an inert atmosphere, wherein the inert atmosphere is argon; the ball milling refers to dry milling and then wet milling, and drying is needed after wet milling;
placing the mixture in an HPS rapid hot-pressing sintering furnace for hot-pressing sintering, and cooling to obtain the high-entropy alloy binding phase tungsten carbide hard alloy; the sintering conditions are as follows: sintering at the pressure of 40-70 MPa; the sintering temperature is 1250-1450 ℃.
And the sintering specifically comprises vacuumizing, adjusting the sintering pressure, heating to 1100 ℃ at a speed of 100-200 ℃/min, then continuously heating to 1250-1450 ℃ at a speed of 50-100 ℃/min, and carrying out heat preservation sintering. The heat preservation time at 1250-1450 ℃ is 5-15 minutes.
The low-content high-entropy alloy bonding phase tungsten carbide hard alloy for the water jet cutter is a solid solution high-entropy alloy in a bonding phase, and WC is a hard phase. By adding a small amount of binding phase, compared with pure WC sintering, the sintering temperature is effectively reduced, so that the sintering cost is reduced, and simultaneously, the hardness and the wear resistance are far higher than those of high-binding-phase WC hard alloy on the market. The binder phase added in the invention is high-entropy alloy, replaces the traditional binder phase Co element, and the mass fraction of the binder phase added is far less than 3% or 6% of that of WC hard alloy used for water jet cutting in the market, so that the raw material cost is reduced to a certain extent, and meanwhile, the preparation of the superfine tungsten carbide hard alloy is realized by utilizing the inhibition effect of the high-entropy alloy on the growth of WC grains and adopting HPS rapid hot-pressing sintering, so that the hard alloy has good comprehensive mechanical properties.
Compared with the prior art, the invention has the following advantages and effects:
according to the low-content high-entropy alloy binding phase tungsten carbide hard alloy for the water jet cutter, a small amount of binding phase is added, so that the sintering temperature is reduced compared with pure WC sintering, and the production cost is effectively reduced. Compared with the high-bonding-phase WC hard alloy used for producing the water jet cutter sand pipe on the market, the hardness and the wear resistance are obviously improved.
The tungsten carbide hard alloy with the low-content high-entropy alloy binding phase for the water jet cutter adopts the high-entropy alloy as the binding phase, can partially or completely replace Co by adjusting the components and the content thereof in the high-entropy alloy binding phase, reduces the addition content of the binding phase, reduces the consumption of Co while ensuring the performance of the hard alloy, and reduces the cost of raw materials to a certain extent. Meanwhile, the high-entropy alloy can better inhibit grain growth compared with Co.
The low-content high-entropy alloy binding phase tungsten carbide hard alloy for the water jet cutter is consolidated and formed by adopting an HPS (high pressure sintering) rapid hot-pressing sintering process. Because the rapid hot-pressing sintering has the advantages of high heating rate, short sintering time, low sintering temperature, high cooling rate and the like, the hard alloy with good density can be obtained by short-time sintering at a lower sintering temperature, the growth of WC crystal grains in the sintering process can be obviously inhibited, and the comprehensive mechanical property of the hard alloy is effectively improved.
The low-content high-entropy alloy binding phase tungsten carbide hard alloy for the water jet cutter adopts 0.5 mass percent of Al0.5The CoCrCuFeNi high-entropy alloy is used as a binding phase, under the process conditions that the sintering pressure is 60MPa, the sintering temperature is 1400 ℃ and the sintering time is 15 minutes, the WC average grain size of the hard alloy is 340nm, and the Vickers' average grain size isHardness of 2526HV30The fracture toughness is 7.76MPa m1/2. The high-entropy AlCoCrCuFeNi alloy with the mass fraction of 0.5 percent is used as a binding phase, and the Vickers hardness is 2467HV under the process conditions that the sintering pressure is 60MPa, the sintering temperature is 1400 ℃ and the sintering time is 15 minutes30The fracture toughness is 7.84MPa m1/2. The AlCoCrCuFeNi high-entropy alloy with the mass fraction of 1 percent is used as a binding phase, and the Vickers hardness is 2420HV under the process conditions that the sintering pressure is 60MPa, the sintering temperature is 1380 ℃ and the sintering time is 15 minutes30The fracture toughness is 8.21MPa m1/2. The water jet cutting sand pipe prepared by the three novel hard alloys can be used for more than 120 hours under the working pressure of 350 MPa.
Drawings
Fig. 1 is a scanning electron microscope image of the high-entropy alloy binder phase-based ultrafine tungsten carbide cemented carbide obtained in example 1 of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The invention relates to a preparation method of a high-entropy alloy binding phase tungsten carbide hard alloy for a water jet scalpel, which can be realized by the following steps:
1) weighing Al, Co, Cr, Cu, Fe and Ni powder with the average particle size of less than 50 mu m according to the molar ratio of 0.5:1:1:1:1, mixing the powder on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling the mixed powder into hard alloy grinding balls according to the ball-to-material ratio of 10:1, carrying out dry milling for 40 hours in an argon environment at the rotating speed of 300 r/min, carrying out wet milling for 2 hours by taking ethanol as a medium, and drying and sieving to obtain the high-entropy alloy powder.
2) Weighing 0.7g of the high-entropy alloy powder obtained in the step 1) and 140g of WC powder with the average particle size of 0.4 mu m, mixing the materials on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling the mixed powder into hard alloy grinding balls according to the ball-to-material ratio of 5:1, carrying out dry milling on the mixed powder for 30 hours in an argon environment at the rotating speed of 300 r/min, carrying out wet milling on the mixed powder for 2 hours by using ethanol as a medium, and drying and sieving the mixed powder to obtain uniform mixed powder.
3) Putting 120g of the mixed powder obtained in the step 2) into a square graphite die cavity with the side length of 36mm, putting the square graphite die cavity into an HPS hot-pressing sintering furnace, pumping until the vacuum is less than 10Pa, adjusting the sintering pressure to 60MPa, then heating to 1100 ℃ at the heating rate of 200 ℃/min, heating to 1400 ℃ at the heating rate of 50 ℃/min, preserving the heat for 15 minutes, and finally cooling to 100 ℃ along with the furnace to obtain the WC with the average grain size of 340nm, the density of 99.5 percent and the Vickers hardness of 2526HV30The fracture toughness is 7.76MPa m1/2The tungsten carbide hard alloy based on the high-entropy alloy binding phase. The water jet sand pipe processed by the hard alloy is used for more than 120 hours under the working pressure of 350 MPa.
Fig. 1 is a scanning electron microscope image of the high-entropy alloy binder phase tungsten carbide-based cemented carbide obtained in example 1.
Example 2
The invention relates to a preparation method of a high-entropy alloy binding phase tungsten carbide hard alloy for a water jet scalpel, which can be realized by the following steps:
1) weighing Al, Co, Cr, Cu, Fe and Ni powder with the average particle size of less than 50 mu m according to the molar ratio of 1:1:1:1:1, mixing the powder on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling the mixed powder into hard alloy grinding balls according to the ball-to-material ratio of 10:1, carrying out dry milling for 40 hours in an argon environment at the rotating speed of 300 r/min, carrying out wet milling for 2 hours by taking ethanol as a medium, and drying and sieving to obtain the high-entropy alloy powder.
2) Weighing 0.7g of the high-entropy alloy powder obtained in the step 1) and 140g of WC powder with the average particle size of 0.4 mu m, mixing the materials on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling the mixed powder into hard alloy grinding balls according to the ball-to-material ratio of 5:1, carrying out dry milling on the mixed powder for 30 hours in an argon environment at the rotating speed of 300 r/min, carrying out wet milling on the mixed powder for 2 hours by using ethanol as a medium, and drying and sieving the mixed powder to obtain uniform mixed powder.
3) Weighing 120g of the mixed powder in the step 2), putting the mixed powder into a square graphite die cavity with the side length of 36mm, putting the square graphite die cavity into an HPS hot-pressing sintering furnace, pumping until the vacuum is less than 10Pa, adjusting the sintering pressure to 60MPa, then heating to 1100 ℃ at the heating rate of 200 ℃/min, and then heating to 1400 ℃ (heating to 1400 DEG CSpeed 50 ℃/min) for 15 minutes, and finally cooling to 100 ℃ along with the furnace, thus obtaining the density of 98.9 percent and the Vickers hardness of 2467HV30The fracture toughness is 7.84MPa m1/2The tungsten carbide hard alloy based on the high-entropy alloy binding phase. The water jet sand pipe processed by the hard alloy is used for more than 120 hours under the working pressure of 350 MPa.
Example 3
The invention relates to a preparation method of a high-entropy alloy binding phase tungsten carbide hard alloy for a water jet scalpel, which can be realized by the following steps:
1) weighing Al, Co, Cr, Cu, Fe and Ni powder with the average particle size of less than 50 mu m according to the molar ratio of 1:1:1:1:1, mixing the powder on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling the mixed powder into hard alloy grinding balls according to the ball-to-material ratio of 10:1, carrying out dry milling for 40 hours in an argon environment at the rotating speed of 300 r/min, carrying out wet milling for 2 hours by taking ethanol as a medium, and drying and sieving to obtain the high-entropy alloy powder.
2) Weighing 1.4g of the high-entropy alloy powder obtained in the step 1) and 140g of WC powder with the average particle size of 0.4 mu m, mixing the materials on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling the mixed powder into hard alloy grinding balls according to the ball-to-material ratio of 5:1, carrying out dry milling on the mixed powder for 30 hours in an argon environment at the rotating speed of 300 r/min, carrying out wet milling on the mixed powder for 2 hours by using ethanol as a medium, and drying and sieving the mixed powder to obtain uniform mixed powder.
3) Weighing 120g of the mixed powder obtained in the step 2), putting the mixed powder into a square graphite die cavity with the side length of 36mm, putting the square graphite die cavity into an HPS hot-pressing sintering furnace, pumping until the vacuum is less than 10Pa, adjusting the sintering pressure to 60MPa, then heating to 1100 ℃ at the heating rate of 200 ℃/min, heating to 1380 ℃ (the heating rate is 50 ℃/min), preserving the heat for 15 minutes, and finally cooling to 100 ℃ along with the furnace to obtain the product with the density of 99.2 percent and the Vickers hardness of 2420HV30The fracture toughness is 8.21MPa m1/2The tungsten carbide hard alloy based on the high-entropy alloy binding phase. The water jet sand pipe processed by the hard alloy is used for more than 120 hours under the working pressure of 350 MPa.
Comparative example
A preparation method of tungsten carbide hard alloy comprises the following steps:
weighing 120g of WC powder with the average grain diameter of 0.4 mu m, filling the WC powder into a square graphite mold cavity with the side length of 36mm, putting the square graphite mold cavity into an HPS hot-pressing sintering furnace, pumping until the vacuum is less than 10Pa, adjusting the sintering pressure to 60MPa, heating to 1100 ℃ at the heating rate of 200 ℃/min, heating to 1700 ℃ (the heating rate of 50 ℃/min), preserving heat for 15 minutes, and finally cooling to 100 ℃ along with the furnace to obtain the WC-Co-fired ceramic material with the density of 99.5 percent and the Vickers hardness of 2610HV30The fracture toughness is 5.62MPa m1/2The cemented carbide without binding phase.
The sintering densification process without adding the high-entropy alloy binding phase tungsten carbide needs higher temperature, the hardness is improved, but the toughness is obviously reduced.
As described above, in the low-content high-entropy alloy binding phase tungsten carbide hard alloy for the water jet cutter, the binding phase is a solid-solution high-entropy alloy, and WC is a hard phase. By adding a small amount of binding phase, compared with pure WC sintering, the sintering temperature is effectively reduced, so that the sintering cost is reduced, and simultaneously, the hardness and the wear resistance are far higher than those of high-binding-phase WC hard alloy on the market. The binder phase added in the invention is high-entropy alloy, replaces the traditional binder phase Co element, and the mass fraction of the binder phase added is far less than 3% or 6% of that of WC hard alloy used for water jet cutting in the market, so that the raw material cost is reduced to a certain extent, and meanwhile, the preparation of the superfine tungsten carbide hard alloy is realized by utilizing the inhibition effect of the high-entropy alloy on the growth of WC grains and adopting HPS rapid hot-pressing sintering, so that the hard alloy has good comprehensive mechanical properties.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (10)
1. The high-entropy alloy bonding phase tungsten carbide hard alloy for the water jet cutter is characterized in that: taking high-entropy alloy as a binding phase and taking tungsten carbide as a hard phase; the mass percentage of the high-entropy alloy in the high-entropy alloy binding phase superfine tungsten carbide hard alloy is 0.2-1%.
2. The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy for the water jet scalpel as claimed in claim 1, is characterized in that: mixing the high-entropy alloy powder with WC powder, and carrying out HPS hot-pressing sintering molding to obtain the high-entropy alloy binding phase tungsten carbide hard alloy.
3. The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy for the water jet scalpel according to claim 2, is characterized in that: and in the sintering process, the pressure is 40-70 MPa.
4. The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy for the water jet scalpel according to claim 2, is characterized in that: in the sintering process, the temperature is 1250-1450 ℃.
5. The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy for the water jet scalpel according to claim 2, is characterized in that: the high-entropy alloy comprises at least five elements of Al, Co, Cr, Cu, Fe and Ni, and the atomic percentage of each element is 5-35%.
6. The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy for the water jet scalpel according to claim 2, is characterized in that: the high-entropy alloy binding phase tungsten carbide hard alloy specifically comprises the following preparation steps: uniformly mixing the prepared high-entropy alloy powder and WC powder, performing ball milling in an inert atmosphere, and sieving to obtain a mixture; then placing the mixture in an HPS hot-pressing sintering furnace for hot-pressing sintering, and cooling to obtain the low-content high-entropy alloy binding phase tungsten carbide hard alloy for the water jet cutter; the hot-pressing sintering conditions comprise: the pressure is 40 MPa-70 MPa, and the temperature is 1250-1450 ℃.
7. The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy for the water jet scalpel according to claim 6, is characterized in that: the hot-pressing sintering process also comprises vacuumizing, adjusting sintering pressure, namely raising the temperature to 1100 ℃ at the speed of 100-200 ℃/min, then continuing raising the temperature to 1250-1450 ℃ at the speed of 50-100 ℃/min, and carrying out heat preservation sintering at the temperature of 1250-1450 ℃ for 5-15 minutes.
8. The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy for the water jet scalpel according to claim 2, is characterized in that: the high-entropy alloy binding phase tungsten carbide hard alloy specifically comprises the following preparation steps:
1) weighing Al, Co, Cr, Cu, Fe and Ni powder with the average particle size of less than 50 mu m according to the molar ratio of 0.5:1:1:1:1, mixing the powder on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling the mixed powder into hard alloy grinding balls according to the ball-to-material ratio of 10:1, carrying out dry milling for 40 hours in an argon environment at the rotating speed of 300 r/min, carrying out wet milling for 2 hours by taking ethanol as a medium, and drying and sieving to obtain high-entropy alloy powder;
2) weighing 0.7g of the high-entropy alloy powder obtained in the step 1) and 140g of WC powder with the average particle size of 0.4 mu m, mixing the materials on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling hard alloy grinding balls according to the ball-to-material ratio of 5:1, carrying out dry milling on the mixed powder for 30 hours in an argon environment at the rotating speed of 300 revolutions per minute, carrying out wet milling on the mixed powder for 2 hours by using ethanol as a medium, and drying and sieving the mixed powder to obtain uniform mixed powder;
3) putting 120g of the mixed powder obtained in the step 2) into a square graphite die cavity with the side length of 36mm, putting the square graphite die cavity into an HPS hot-pressing sintering furnace, pumping until the vacuum is less than 10Pa, adjusting the sintering pressure to 60MPa, then heating to 1100 ℃ at the heating rate of 200 ℃/min, heating to 1400 ℃ at the heating rate of 50 ℃/min, preserving the heat for 15 minutes, and finally cooling to 100 ℃ along with the furnace to obtain the WC with the average grain size of 340nm, the density of 99.5 percent and the Vickers hardness of 2526HV30The fracture toughness is 7.76MPa m1/2The tungsten carbide hard alloy based on the high-entropy alloy binding phase.
9. The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy for the water jet scalpel according to claim 2, is characterized in that: the high-entropy alloy binding phase tungsten carbide hard alloy specifically comprises the following preparation steps:
1) weighing Al, Co, Cr, Cu, Fe and Ni powder with the average particle size of less than 50 mu m according to the molar ratio of 1:1:1:1:1, mixing the powder on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling the mixed powder into hard alloy grinding balls according to the ball-to-material ratio of 10:1, carrying out dry milling for 40 hours in an argon environment at the rotating speed of 300 r/min, carrying out wet milling for 2 hours by taking ethanol as a medium, and drying and sieving to obtain high-entropy alloy powder;
2) weighing 0.7g of the high-entropy alloy powder obtained in the step 1) and 140g of WC powder with the average particle size of 0.4 mu m, mixing the materials on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling hard alloy grinding balls according to the ball-to-material ratio of 5:1, carrying out dry milling on the mixed powder for 30 hours in an argon environment at the rotating speed of 300 revolutions per minute, carrying out wet milling on the mixed powder for 2 hours by using ethanol as a medium, and drying and sieving the mixed powder to obtain uniform mixed powder;
3) weighing 120g of the mixed powder in the step 2), putting the mixed powder into a die cavity of a square graphite die with the side length of 36mm, putting the die cavity into an HPS hot-pressing sintering furnace, pumping until the vacuum is less than 10Pa, adjusting the sintering pressure to 60MPa, then heating to 1100 ℃ at the heating rate of 200 ℃/min, and then heating to 1400 ℃ for heat preservation for 15 minutes; the temperature rise to 1400 ℃ means that the temperature rise speed is 50 ℃/min; finally, the mixture is cooled to 100 ℃ along with the furnace, thus obtaining the product with the density of 98.9 percent and the Vickers hardness of 2467HV30The fracture toughness is 7.84MPa m1/2The tungsten carbide hard alloy based on the high-entropy alloy binding phase.
10. The preparation method of the high-entropy alloy binding phase tungsten carbide hard alloy for the water jet scalpel according to claim 2, is characterized in that: the high-entropy alloy binding phase tungsten carbide hard alloy specifically comprises the following preparation steps:
1) weighing Al, Co, Cr, Cu, Fe and Ni powder with the average particle size of less than 50 mu m according to the molar ratio of 1:1:1:1:1, mixing the powder on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling the mixed powder into hard alloy grinding balls according to the ball-to-material ratio of 10:1, carrying out dry milling for 40 hours in an argon environment at the rotating speed of 300 r/min, carrying out wet milling for 2 hours by taking ethanol as a medium, and drying and sieving to obtain high-entropy alloy powder;
2) weighing 1.4g of the high-entropy alloy powder obtained in the step 1) and 140g of WC powder with the average particle size of 0.4 mu m, mixing the materials on a powder mixer for 6 hours, putting the mixed powder into a hard alloy ball milling tank, filling hard alloy grinding balls according to the ball-to-material ratio of 5:1, carrying out dry milling on the mixed powder for 30 hours in an argon environment at the rotating speed of 300 revolutions per minute, carrying out wet milling on the mixed powder for 2 hours by using ethanol as a medium, and drying and sieving the mixed powder to obtain uniform mixed powder;
3) weighing 120g of the mixed powder in the step 2), putting the mixed powder into a die cavity of a square graphite die with the side length of 36mm, putting the die cavity into an HPS hot-pressing sintering furnace, pumping until the vacuum is less than 10Pa, adjusting the sintering pressure to 60MPa, then heating to 1100 ℃ at the heating rate of 200 ℃/min, then heating to 1380 ℃ and preserving the heat for 15 minutes, wherein the heating to 1380 ℃ means that the heating rate is 50 ℃/min; finally, the mixture is cooled to 100 ℃ along with the furnace, thus obtaining the product with the density of 99.2 percent and the Vickers hardness of 2420HV30The fracture toughness is 8.21MPa m1/2The tungsten carbide hard alloy based on the high-entropy alloy binding phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911359542.7A CN110964965A (en) | 2019-12-25 | 2019-12-25 | High-entropy alloy binding phase tungsten carbide hard alloy for water jet cutter and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911359542.7A CN110964965A (en) | 2019-12-25 | 2019-12-25 | High-entropy alloy binding phase tungsten carbide hard alloy for water jet cutter and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110964965A true CN110964965A (en) | 2020-04-07 |
Family
ID=70036575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911359542.7A Pending CN110964965A (en) | 2019-12-25 | 2019-12-25 | High-entropy alloy binding phase tungsten carbide hard alloy for water jet cutter and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110964965A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961940A (en) * | 2020-08-20 | 2020-11-20 | 四川轻化工大学 | WC-based hard alloy containing high-entropy ceramic phase and preparation method thereof |
| CN112647006A (en) * | 2020-12-02 | 2021-04-13 | 株洲精工硬质合金有限公司 | Tungsten carbide-based hard alloy and preparation method thereof |
| CN114774750A (en) * | 2022-05-10 | 2022-07-22 | 东莞理工学院 | Tungsten carbide material bonded by enhanced high-entropy alloy and preparation method thereof |
| CN114921702A (en) * | 2022-02-21 | 2022-08-19 | 有研工程技术研究院有限公司 | Material for producing wedge-shaped cleaver and preparation method thereof |
| CN115074590A (en) * | 2021-03-16 | 2022-09-20 | 湖南工业大学 | Refractory high-entropy alloy binding phase superfine tungsten carbide hard alloy |
| CN115161505A (en) * | 2022-07-21 | 2022-10-11 | 广东工业大学 | Preparation method of novel binder phase hard alloy |
| WO2022262420A1 (en) * | 2021-06-18 | 2022-12-22 | 厦门钨业股份有限公司 | Wc-based hard alloy and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252081A (en) * | 2018-10-31 | 2019-01-22 | 华南理工大学 | A kind of high-entropy alloy Binder Phase ultrafine tungsten carbide hard alloy and preparation method thereof |
| CN109371307A (en) * | 2018-11-29 | 2019-02-22 | 福建工程学院 | It is a kind of using high-entropy alloy powder as the preparation method of the WC base cemented carbide of binder |
-
2019
- 2019-12-25 CN CN201911359542.7A patent/CN110964965A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252081A (en) * | 2018-10-31 | 2019-01-22 | 华南理工大学 | A kind of high-entropy alloy Binder Phase ultrafine tungsten carbide hard alloy and preparation method thereof |
| CN109371307A (en) * | 2018-11-29 | 2019-02-22 | 福建工程学院 | It is a kind of using high-entropy alloy powder as the preparation method of the WC base cemented carbide of binder |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961940A (en) * | 2020-08-20 | 2020-11-20 | 四川轻化工大学 | WC-based hard alloy containing high-entropy ceramic phase and preparation method thereof |
| CN111961940B (en) * | 2020-08-20 | 2021-09-21 | 四川轻化工大学 | WC-based hard alloy containing high-entropy ceramic phase and preparation method thereof |
| CN112647006A (en) * | 2020-12-02 | 2021-04-13 | 株洲精工硬质合金有限公司 | Tungsten carbide-based hard alloy and preparation method thereof |
| CN112647006B (en) * | 2020-12-02 | 2022-11-04 | 株洲精工硬质合金有限公司 | Tungsten carbide-based hard alloy and preparation method thereof |
| CN115074590A (en) * | 2021-03-16 | 2022-09-20 | 湖南工业大学 | Refractory high-entropy alloy binding phase superfine tungsten carbide hard alloy |
| WO2022262420A1 (en) * | 2021-06-18 | 2022-12-22 | 厦门钨业股份有限公司 | Wc-based hard alloy and application thereof |
| CN114921702A (en) * | 2022-02-21 | 2022-08-19 | 有研工程技术研究院有限公司 | Material for producing wedge-shaped cleaver and preparation method thereof |
| CN114774750A (en) * | 2022-05-10 | 2022-07-22 | 东莞理工学院 | Tungsten carbide material bonded by enhanced high-entropy alloy and preparation method thereof |
| CN115161505A (en) * | 2022-07-21 | 2022-10-11 | 广东工业大学 | Preparation method of novel binder phase hard alloy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110964965A (en) | High-entropy alloy binding phase tungsten carbide hard alloy for water jet cutter and preparation method thereof | |
| CN109252081B (en) | High-entropy alloy binding phase superfine tungsten carbide hard alloy and preparation method thereof | |
| CN104451322B (en) | A kind of tungsten carbide base carbide alloy and preparation method thereof | |
| CN110257684B (en) | Preparation process of FeCrCoMnNi high-entropy alloy-based composite material | |
| CN108624772B (en) | Ultra-fine grain tungsten carbide-based hard alloy material and preparation method thereof | |
| CN110923498B (en) | Copper-based powder metallurgy friction material containing metal carbide and metal oxide composite ceramic friction component and preparation method thereof | |
| CN101121983A (en) | Method for preparing coarse grain hard alloy | |
| CN103058662B (en) | Titanium diboride-based composite self-lubricating ceramic tool material and preparation method thereof | |
| CN110358960B (en) | Preparation method of high-strength and high-toughness Ti (C, N) -based metal ceramic | |
| CN112647006B (en) | Tungsten carbide-based hard alloy and preparation method thereof | |
| CN114921702B (en) | Material for producing wedge-shaped cleavers and preparation method thereof | |
| CN103588489A (en) | Silicon nitride composite ceramic lift tube for low-pressure casting and preparation method thereof | |
| CN110735075A (en) | Preparation method of WC-based hard alloys with high wear resistance | |
| CN110157969B (en) | Preparation method of ultra-coarse tungsten carbide hard alloy containing trace cobalt | |
| CN114959406A (en) | Oscillatory pressure sintering ultrahigh-temperature medium-entropy ceramic reinforced refractory fine-grain medium-entropy alloy composite material | |
| CN110183231B (en) | Preparation method of high-strength high-toughness boron carbide-based ceramic material and ceramic material thereof | |
| CN113278858B (en) | Y2(Zr) O3 hardening and toughening WC-Co hard alloy material and preparation method thereof | |
| 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 | |
| CN104131206A (en) | Titanium carbonitride-based hard alloy high-speed wire guide wheel material and preparation method thereof | |
| CN111979463A (en) | WC-Co-Y2O3-Zr hard alloy with excellent comprehensive mechanical property and preparation method thereof | |
| CN108411179B (en) | Multiphase titanium diboride/titanium carbonitride cermet and preparation method thereof | |
| CN114318163B (en) | Superfine multi-element prealloy powder for diamond tool and preparation method thereof | |
| KR100700197B1 (en) | Process for Manufacturing Sintered Materials Containing Cobalt Component | |
| CN115198131A (en) | Method for preparing high-performance mixed crystal Ti (C, N) -based metal ceramic by hard phase and additive phase synergistic particle grading |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200407 |
|
| WD01 | Invention patent application deemed withdrawn after publication |