Manufacturing method of supercooled isostatic pressing high-bonding-phase hard alloy roller and supercooled isostatic pressing high-bonding-phase hard alloy roller

Abstract

The invention provides a supercooling isostatic pressing high-bonding-phase hard alloy roller manufacturing method and a roller, and relates to the technical field of hard alloy roller preparation. WC, Co, Ni and Cr3C2 are used as raw materials, ball milling, spray drying and pressing are carried out to prepare a roller blank, then the roller blank is loaded into a latex bag for vacuumizing, wrapping and winding are carried out with a preservative film, cold isostatic pressing treatment is carried out, and finally dewaxing and vacuum pressure sintering are carried out to prepare the hard alloy roller with excellent performance. According to the hard alloy roller manufactured through the method, the bonding phase accounts for 25%-30%, the density of a pressed blank is more uniform and consistent, pores in a sintered body are reduced, the high-density sintered body is obtained, the problem of sintering deformation is effectively solved, the problem of a cobalt pool easily generated by a high-viscosity phase can be effectively solved, WC grains are evenly distributed in the bonding phase, and the hardness of the hard alloy roller is improved. Therefore, the hardness, the wear resistance and the bending strength of the high-bonding-phase hard alloy roller are improved, and the product competitiveness of enterprises is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of cemented carbide roll manufacturing technology, specifically to a method for manufacturing a high-viscosity cemented carbide roll under supercooled isostatic pressing and the roll itself. Background Technology

[0002] Hard alloy materials are renowned for their exceptional hardness, strength, wear resistance, and excellent chemical and thermal stability, and are widely used in many important fields such as machining, geological drilling, and mining.

[0003] Rolls are a common product in the field of cemented carbide. Currently, the rolling speed of rolling mills can reach up to 130 m / s. Low-viscosity phase rolls are made of harder materials, and are more prone to breakage and roll explosion when the rolling speed is too high. Therefore, high-viscosity phase rolls have become the first choice.

[0004] In the market, the binder phase content of cemented carbide is generally below 10%, such as the common YG8 grade. The binder phase content can be as high as 20%, such as in the YG20 grade. High-binding-phase cemented carbide rolls contain more than 25% binder phase. During sintering, more liquid phase is formed, making them more sensitive to changes in carbon content and temperature. Therefore, during sintering, firstly, from a macroscopic perspective, the product is prone to sagging and deformation, leading to scrap; secondly, from a microscopic perspective, the binder phase is unevenly distributed in the WC (wax cobalt), easily resulting in cobalt pooling, which in turn leads to a decline in the physical properties of the product.

[0005] Therefore, optimizing the manufacturing process of cemented carbide rolls to reduce the sintering deformation of high-viscosity phase rolls and give them better hardness, wear resistance and bending strength is a difficult problem that needs to be solved. Summary of the Invention

[0006] To address the problems in the prior art, this invention proposes a method for manufacturing high-viscosity cemented carbide rolls under supercooled isostatic pressing and the rolls themselves.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for manufacturing a supercooled isostatic pressing high-viscosity phase cemented carbide roll, characterized by comprising the following steps: 1) Weigh the raw materials containing Co powder, Ni powder, Cr3C2 powder and WC powder, and ball-mill them together using ethanol as the medium. The raw material ratio includes 10-20 wt% Co powder, 10-15 wt% Ni powder, 0-3 wt% Cr3C2 powder and 62-80 wt% WC powder. 2) The ball-milled slurry is dried to obtain a mixed powder; 3) Press the mixed powder to form a roll blank; 4) After the roll blank is packaged, it is placed in a cold isostatic press for cold isostatic pressing. The pressure range of the cold isostatic pressing is 0.35~0.45GPa, and the holding time is 300~420s. 5) The roll blank that has undergone cold isostatic pressing is heated in a hydrogen atmosphere to perform micro-positive pressure dewaxing; 6) The dewaxed roll blank is heated in three sections from room temperature to the highest temperature of 1380~1400℃ for vacuum sintering. After holding at the highest temperature for 60~90min, pressure sintering is carried out in an inert atmosphere and held for 40~60min.

[0008] As a preferred embodiment of the present invention, the Fisher particle size of Co powder is 2~4μm, the Fisher particle size of Ni powder is 1~3μm, the Fisher particle size of Cr3C2 powder is 2~4μm, and the Fisher particle size of WC powder is 10~13μm.

[0009] As a preferred embodiment of the present invention, the ball-to-material ratio of the ball milling mixture is 3:1, the forming agent is 52# paraffin wax, the wax-to-material ratio is 2.3%~2.5%, the liquid-to-solid ratio is 300mL / kg~350 mL / kg, and the ball milling time is 18h~24h.

[0010] As a preferred embodiment of the present invention, in step 2), the drying is carried out using a spray drying tower, with a nozzle pressure of 2.5~3.5MPa, a nozzle size of 1~1.2mm, an inlet air temperature of 180~220℃, and an outlet air temperature of 90~100℃.

[0011] As a preferred embodiment of the present invention, in step 3), the pressing pressure is 180~200Mpa and the holding time is 8min~12min.

[0012] As a preferred embodiment of the present invention, in step 4), before the supercooled isostatic pressing treatment, the roll blank needs to be placed in a sealed bag, vacuumed and sealed, and then wrapped with a sealing film.

[0013] As a preferred embodiment of the present invention, in step 5), the specific heating process of the micro-positive pressure dewaxing treatment is as follows: the temperature is raised from room temperature to 350-380°C at a rate of 3-5°C / min, and held for 60-80 min; the temperature is raised from 350-380°C to the highest temperature of 700-750°C at a rate of 1-3°C / min, and held for 80-100 min; the hydrogen flow rate is 30-35 L / min throughout the heating process.

[0014] As a preferred embodiment of the present invention, in step 6), the specific heating process of the vacuum sintering is as follows: the temperature is increased from room temperature to 700-750°C at a rate of 8-10°C / min, and held for 30-50 min; the temperature is increased from 700-750°C to 1150-1200°C at a rate of 5-8°C / min, and held for 30-50 min; the temperature is increased from 1150-1200°C to the highest temperature of 1380-1400°C at a rate of 3-5°C / min, and held for 60-90 min; during the vacuum sintering process, the vacuum degree inside the furnace is maintained at 0-5 Pa; during the pressure sintering, inert high-pressure argon gas is introduced, and the pressure inside the furnace is maintained at 5-8 MPa.

[0015] As a preferred embodiment of the present invention, in step 6), a fan is used for cooling after the pressure sintering is completed.

[0016] A high-adhesion phase cemented carbide roll, characterized in that the high-adhesion phase cemented carbide roll is manufactured by the method of any one of claims 1 to 9.

[0017] The beneficial effects of this invention are as follows: After the high-viscosity cemented carbide rolls are pressed from powder, they undergo a cold isostatic pressing process. This significantly reduces or even completely eliminates the density gradients formed between the powder and the inner wall of the die during the pressing process, resulting in a uniform density throughout the roll. During sintering, this effectively reduces defects such as sagging and deformation that are common in high-viscosity cemented carbide rolls due to the higher liquid phase content, improving yield and solving the sintering challenges of high-viscosity cemented carbide. Simultaneously, it effectively improves the distribution of WC in the high-viscosity cemented carbide rolls, ensuring uniform WC grain distribution in the liquid phase, preventing cobalt pooling, and comprehensively enhancing the product's hardness, wear resistance, and bending strength. Attached Figure Description

[0018] Figure 1 Metallographic features of a 25% binder phase cemented carbide roll sample prepared in Example 1; Figure 2 Metallographic image of a cemented carbide roll sample with 25% binder phase prepared for Comparative Example 1; Figure 3 Metallographic features of a cemented carbide roll sample with 28% binder phase prepared in Example 2; Figure 4 Metallographic image of a cemented carbide roll sample with 28% binder phase prepared for Comparative Example 2; Figure 5 Metallographic features of a cemented carbide roll sample with 30% binder phase prepared in Example 3; Figure 6 Metallographic image of a cemented carbide roll sample with 30% binder phase prepared for Comparative Example 3. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] Example 1 The method for manufacturing a high-viscosity phase cemented carbide roll by supercooled isostatic pressing, as described in this embodiment, specifically includes the following steps: (1) Prepare 75 parts by weight of WC powder with a Fisher particle size of 12μm, 12 parts by weight of Co powder with a Fisher particle size of 3μm, 12 parts by weight of Ni powder with a Fisher particle size of 2μm, and 1 part by weight of Cr3C2 powder with a Fisher particle size of 3μm. Place the prepared WC powder, Co powder, Ni powder, and Cr3C2 powder in a tilting ball mill and add carbide balls for ball milling. The ball-to-material ratio is 3:1. Use 52# paraffin wax as a forming agent with a wax-to-material ratio of 2.3%. Use anhydrous alcohol as the grinding medium with a liquid-to-solid ratio of 300ml / Kg. After ball milling for 24 hours, discharge the slurry from the ball mill. (2) The slurry obtained in step (1) is passed through a spray drying tower to separate and recover alcohol, and a dry mixed powder is obtained. The pressure of the pressure nozzle is 3.5 MPa, the nozzle size is 1 mm, the inlet air temperature in the drying tower is 180℃, and the outlet air temperature is 90℃. (3) Add the mixed powder obtained in step (2) into a stainless steel mold, press it with a 1200T hydraulic press, press it with a pressure of 180MPa, and hold it for 8 minutes after pressing to obtain a 25% high adhesion phase roll blank. (4) The pressed blank obtained in step (3) is put into a latex bag, vacuumed and sealed, then wrapped with plastic wrap to prevent moisture from entering, and then put into a cold isostatic press to perform cold isostatic pressing treatment on the pressed blank. The pressure is 0.35 GPa and the holding time is 300 s. (5) The pressed blank obtained in step (4) is placed into a dewaxing furnace for heating and dewaxing. The temperature is raised from room temperature to 380℃ at a rate of 5℃ / min. After holding for 80 minutes, the temperature is raised from 380℃ to the highest temperature of 750℃ at a rate of 3℃ / min. After holding for 100 minutes, hydrogen is continuously introduced during the heating process at a flow rate of 30L / min for micro-positive pressure dewaxing. (6) The dewaxed compact obtained in step (5) is loaded into a vacuum pressure sintering furnace. The furnace is evacuated and the temperature is raised from room temperature to 750°C at a rate of 10°C / min. After holding for 50 min, the temperature is raised from 750°C to 1200°C at a rate of 8°C / min. After holding for 50 min again, the temperature is raised from 1200°C to the highest temperature of 1400°C at a rate of 5°C / min. After holding for 90 min, the vacuum degree in the furnace is maintained at 0~5 Pa. After holding at the highest temperature, inert high-pressure gas argon is introduced for pressure sintering. The pressure in the furnace is maintained at 8 MPa and held for 60 min. After holding, the blower is turned on for rapid cooling to obtain a 25% cemented carbide roll.

[0021] The 25% binder phase cemented carbide roll prepared in this embodiment was processed into Type B specimens according to GB / T 3851-2015. Six samples were randomly selected for performance testing, and the average value of the test results was used as the final performance data. The comprehensive performance characterization of the roll specimen is as follows: In terms of mechanical properties, its Rockwell hardness is 81.3 HRA, and its bending strength is as high as 2754 MPa; in terms of physical properties, its density is 13.228 g / cm³. 3 The average grain size is 2.62 μm (maximum 4.58 μm), and the metallographic structure is as follows: Figure 1 As shown, in terms of magnetic properties, it exhibits a coercivity of 4.24 KA / m and a cobalt magnetism of 13.64%. Dimensional measurements of the sintered product revealed a difference of 0.22 mm between the outer diameters of the upper and lower end faces.

[0022] Comparative Example 1 In this comparative example, the process parameters for each process in the raw material ratio, wet grinding, spray drying, pressing, dewaxing, and sintering are the same as in Example 1. The difference is that the pressed compact does not undergo the cold isostatic pressing treatment in step (4) and is directly dewaxed and sintered.

[0023] The 25% binder phase cemented carbide roll prepared in this comparative example was processed into Type B specimens according to GB / T 3851-2015. Six samples were randomly selected for performance testing, and the average value of the test results was used as the final performance data. The comprehensive performance characterization of the uncooled isostatically pressed roll specimen is as follows: In terms of mechanical properties, its Rockwell hardness is 80.8 HRA, and its bending strength is as high as 2661 MPa; in terms of physical properties, its density is 13.175 g / cm³. 3 The average grain size is 2.84 μm (maximum 5.34 μm), and the metallographic structure is as follows: Figure 2 As shown, in terms of magnetic properties, it exhibits a coercivity of 4.07 KA / m and a cobalt magnetism of 13.66%. Dimensional measurements of the sintered product revealed a difference of 0.75 mm between the outer diameters of the upper and lower end faces.

[0024] Example 2 The method for manufacturing a high-viscosity phase cemented carbide roll by supercooled isostatic pressing, as described in this embodiment, specifically includes the following steps: (1) Prepare 72 parts by weight of WC powder with a Fisher particle size of 12μm, 15 parts by weight of Co powder with a Fisher particle size of 3μm, 12 parts by weight of Ni powder with a Fisher particle size of 2μm, and 1 part by weight of Cr3C2 powder with a Fisher particle size of 3μm. Place the prepared WC powder, Co powder, Ni powder, and Cr3C2 powder in a tilting ball mill and add carbide balls for ball milling. The ball-to-material ratio is 3:1. Use 52# paraffin wax as a forming agent with a wax-to-material ratio of 2.4%. Use anhydrous alcohol as the grinding medium with a liquid-to-solid ratio of 330ml / Kg. After ball milling for 20 hours, discharge the slurry from the ball mill. (2) The slurry obtained in step (1) is passed through a spray drying tower to separate and recover alcohol, and a dry mixed powder is obtained. The pressure of the pressure nozzle is 3MPa, the nozzle size is 1.1mm, the inlet air temperature in the drying tower is 200℃, and the outlet air temperature is 95℃. (3) Add the mixed powder obtained in step (2) into a stainless steel mold, press it with a 1200T hydraulic press, press it with a pressure of 190MPa, and hold it for 10 minutes after pressing to obtain a 28% high adhesion phase roll blank. (4) The pressed blank obtained in step (3) is put into a latex bag, vacuumed and sealed, then wrapped with plastic wrap to prevent moisture from entering, and then put into a cold isostatic press to perform cold isostatic pressing treatment on the pressed blank. The pressure is 0.4 GPa and the holding time is 360 s. (5) The pressed blank obtained in step (4) is placed into a dewaxing furnace for heating and dewaxing. The temperature is raised from room temperature to 360°C at a rate of 4°C / min. After holding for 70 minutes, the temperature is raised from 360°C to the highest temperature of 720°C at a rate of 2°C / min. After holding for 90 minutes, hydrogen is continuously introduced during the heating process at a flow rate of 33L / min for micro-positive pressure dewaxing. (6) The dewaxed compact obtained in step (5) is loaded into a vacuum pressure sintering furnace. The furnace is evacuated and the temperature is raised from room temperature to 730°C at a rate of 9°C / min. After holding for 40 min, the temperature is raised from 730°C to 1170°C at a rate of 9°C / min. After holding for 40 min again, the temperature is raised from 1170°C to the highest temperature of 1390°C at a rate of 4°C / min. After holding for 75 min, the vacuum degree in the furnace is maintained at 0~5 Pa. After holding at the highest temperature, inert high-pressure argon gas is introduced for pressure sintering. The pressure in the furnace is maintained at 6 MPa and held for 50 min. After holding, the blower is turned on for rapid cooling to obtain a 28% cemented carbide roll.

[0025] The 28% binder phase cemented carbide roll prepared in this embodiment was processed into Type B specimens according to GB / T 3851-2015. Six samples were randomly selected for performance testing, and the average value of the test results was used as the final performance data. The comprehensive performance characterization of the roll specimen is as follows: In terms of mechanical properties, its Rockwell hardness is 80.5 HRA, and its bending strength is as high as 2657 MPa; in terms of physical properties, its density is 12.909 g / cm³. 3 The average grain size is 2.81 μm (maximum 4.86 μm), and the metallographic structure is as follows: Figure 3 As shown, in terms of magnetic properties, it exhibits a coercivity of 3.81 KA / m and a cobalt magnetism of 15.14%. Dimensional measurements of the sintered product revealed a difference of 0.34 mm between the outer diameters of the upper and lower end faces.

[0026] Comparative Example 2 In this comparative example, the process parameters for each process, including the proportion of raw materials, wet grinding, spray drying, pressing, dewaxing, and sintering, are the same as in Example 2. The difference is that the pressed compact is not subjected to cold isostatic pressing and is directly dewaxed and sintered.

[0027] The 28% binder phase cemented carbide roll prepared in this comparative example was processed into Type B specimens according to GB / T 3851-2015. Six samples were randomly selected for performance testing, and the average value of the test results was used as the final performance data. The comprehensive performance characterization of the uncooled isostatically pressed roll specimen is as follows: In terms of mechanical properties, its Rockwell hardness is 80.2 HRA, and its bending strength is as high as 2589 MPa; in terms of physical properties, its density is 12.870 g / cm³. 3 The average grain size is 3.05 μm (maximum 5.41 μm), and the metallographic structure is as follows: Figure 4 As shown, in terms of magnetic properties, it exhibits a coercivity of 3.96 KA / m and a cobalt magnetism of 15.08%. Dimensional measurements of the sintered product revealed a difference of 0.97 mm between the outer diameters of the upper and lower end faces.

[0028] Example 3 The method for manufacturing a high-viscosity phase cemented carbide roll by supercooled isostatic pressing, as described in this embodiment, specifically includes the following steps: (1) Prepare 70 parts by weight of WC powder with a Fisher particle size of 12μm, 16 parts by weight of Co powder with a Fisher particle size of 3μm, 13 parts by weight of Ni powder with a Fisher particle size of 2μm, and 1 part by weight of Cr3C2 powder with a Fisher particle size of 3μm. Place the prepared WC powder, Co powder, Ni powder, and Cr3C2 powder in a tilting ball mill and add carbide balls for ball milling. The ball-to-material ratio is 3:1. Use 52# paraffin wax as a forming agent with a wax-to-material ratio of 2.5%. Use anhydrous alcohol as the grinding medium with a liquid-to-solid ratio of 350ml / Kg. After ball milling for 18 hours, discharge the slurry from the ball mill. (2) The slurry obtained in step (1) is passed through a spray drying tower to separate and recover alcohol, and a dry mixed powder is obtained. The pressure of the pressure nozzle is 2.5 MPa, the nozzle size is 1.2 mm, the inlet air temperature in the drying tower is 220°C, and the outlet air temperature is 100°C. (3) Add the mixed powder obtained in step (2) into a stainless steel mold, press it with a 1200T hydraulic press, press it with a pressure of 200MPa, and hold it for 12 minutes after pressing to obtain a 30% high adhesion phase roll blank. (4) The pressed blank obtained in step (3) is put into a latex bag, vacuumed and sealed, then wrapped with plastic wrap to prevent moisture from entering, and then put into a cold isostatic press to perform cold isostatic pressing treatment on the pressed blank. The pressure is 0.45 GPa and the holding time is 420 s. (5) The pressed blank obtained in step (4) is placed into a dewaxing furnace for heating and dewaxing. The temperature is raised from room temperature to 350℃ at a rate of 3℃ / min. After holding for 60 minutes, the temperature is raised from 350℃ to the highest temperature of 700℃ at a rate of 1℃ / min. After holding for 80 minutes, hydrogen is continuously introduced during the heating process at a flow rate of 35L / min for micro-positive pressure dewaxing. (6) The dewaxed compact obtained in step (5) is loaded into a vacuum pressure sintering furnace. The furnace is evacuated and the temperature is raised from room temperature to 700℃ at a rate of 8℃ / min. After holding for 30 min, the temperature is raised from 700℃ to 1150℃ at a rate of 5℃ / min. After holding for 30 min again, the temperature is raised from 1150℃ to the highest temperature of 1380℃ at a rate of 3℃ / min. After holding for 60 min, the vacuum degree in the furnace is maintained at 0~5Pa. After holding at the highest temperature, inert high-pressure argon gas is introduced for pressure sintering. The pressure in the furnace is maintained at 5MPa and held for 40 min. After holding, the blower is turned on for rapid cooling to obtain a 30% cemented carbide roll with a binder phase.

[0029] The 30% binder phase cemented carbide roll prepared in this embodiment was processed into Type B specimens according to GB / T 3851-2015. Six samples were randomly selected for performance testing, and the average value of the test results was used as the final performance data. The comprehensive performance characterization of the roll specimen is as follows: In terms of mechanical properties, its Rockwell hardness is 79.9 HRA, and its bending strength is as high as 2550 MPa; in terms of physical properties, its density is 12.732 g / cm³. 3 The average grain size is 3.01 μm (maximum 5.04 μm), and the metallographic structure is as follows: Figure 5 As shown, in terms of magnetic properties, it exhibits a coercivity of 3.75 KA / m and a cobalt magnetism of 16.84%. Dimensional measurements of the sintered product revealed a difference of 0.43 mm between the outer diameters of the upper and lower end faces.

[0030] Comparative Example 3 In this comparative example, the process parameters for each process, including the proportioning of raw materials, wet grinding, spray drying, pressing, dewaxing, and sintering, are the same as in Example 3. The difference is that the pressed compact is not subjected to cold isostatic pressing and is directly dewaxed and sintered.

[0031] The 30% binder phase cemented carbide roll prepared in this comparative example was processed into Type B specimens according to GB / T 3851-2015. Six samples were randomly selected for performance testing, and the average value of the test results was used as the final performance data. The comprehensive performance characterization of the uncooled isostatically pressed roll specimen is as follows: In terms of mechanical properties, its Rockwell hardness is 79.3 HRA, and its bending strength is as high as 2477 MPa; in terms of physical properties, its density is 12.651 g / cm³. 3 The average grain size is 3.13 μm (maximum 5.87 μm), and the metallographic structure is as follows: Figure 6 As shown, in terms of magnetic properties, it exhibits a coercivity of 3.87 KA / m and a cobalt magnetism of 16.91%. Dimensional measurements of the sintered product revealed a difference of 1.21 mm in the outer diameter of the upper and lower end faces.

[0032] Table 1 shows the performance comparison results of the high-viscosity phase roll samples from Examples 1-3 and Comparative Examples 1-3. A comprehensive evaluation combining performance data, metallographic analysis, and product appearance dimensions shows that, compared to the comparative examples, the high-viscosity phase rolls prepared using the process in the examples exhibit improved hardness and bending strength, demonstrating superior overall characteristics and indicating better wear resistance and fracture toughness during use. Simultaneously, the deformation of the high-viscosity phase during sintering is better controlled, significantly reducing the scrap rate. The research results confirm that this invention has significant application value in the manufacture of high-viscosity phase cemented carbide rolls, providing a feasible approach to achieving the goals of cost reduction, efficiency improvement, and quality enhancement.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any brief modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for manufacturing a high-viscosity cemented carbide roll under supercooled isostatic pressing, characterized in that, Includes the following steps: 1) Weigh the raw materials containing Co powder, Ni powder, Cr3C2 powder and WC powder, and ball-mill them together using ethanol as the medium. The raw material ratio includes 10-20 wt% Co powder, 10-15 wt% Ni powder, 0-3 wt% Cr3C2 powder and 62-80 wt% WC powder. 2) The ball-milled slurry is dried to obtain a mixed powder; 3) Press the mixed powder to form a roll blank; 4) After the roll blank is packaged, it is placed in a cold isostatic press for cold isostatic pressing. The pressure range of the cold isostatic pressing is 0.35~0.45GPa, and the holding time is 300~420s. 5) The roll blank that has undergone cold isostatic pressing is heated in a hydrogen atmosphere to perform micro-positive pressure dewaxing; 6) The dewaxed roll blank is heated in three sections from room temperature to the highest temperature of 1380~1400℃ for vacuum sintering. After holding at the highest temperature for 60~90min, pressure sintering is carried out in an inert atmosphere and held for 40~60min.

2. The method for manufacturing high-viscosity cemented carbide rolls by supercooled isostatic pressing according to claim 1, characterized in that, In step 1), the Fisher particle size of Co powder is 2~4μm, the Fisher particle size of Ni powder is 1~3μm, the Fisher particle size of Cr3C2 powder is 2~4μm, and the Fisher particle size of WC powder is 10~13μm.

3. The method for manufacturing high-viscosity cemented carbide rolls by supercooled isostatic pressing according to claim 1, characterized in that, In step 1), the ball-to-material ratio of the ball milling mixture is 3:1, the forming agent is 52# paraffin wax, the wax-to-material ratio is 2.3%~2.5%, the liquid-to-solid ratio is 300mL / kg~350 mL / kg, and the ball milling time is 18h~24h.

4. The method for manufacturing high-viscosity cemented carbide rolls by supercooled isostatic pressing according to claim 1, characterized in that, In step 2), the drying is carried out using a spray drying tower. The nozzle pressure is 2.5~3.5MPa, the nozzle size is 1~1.2mm, the inlet air temperature is 180~220℃, and the outlet air temperature is 90~100℃.

5. The method for manufacturing high-viscosity cemented carbide rolls by supercooled isostatic pressing according to claim 1, characterized in that, In step 3), the pressing pressure is 180~200 MPa, and the holding time is 8 min~12 min.

6. The method for manufacturing high-viscosity cemented carbide rolls by supercooled isostatic pressing according to claim 1, characterized in that, In step 4), before the supercooled isostatic pressing process, the roll blank must be placed in a sealed bag, vacuumed and sealed, and then wrapped with a sealing film.

7. The method for manufacturing high-viscosity cemented carbide rolls by supercooled isostatic pressing according to claim 1, characterized in that, In step 5), the specific heating process of the micro-positive pressure dewaxing treatment is as follows: the temperature is raised from room temperature to 350-380℃ at a rate of 3-5℃ / min, and held for 60-80min; the temperature is raised from 350-380℃ to the highest temperature of 700-750℃ at a rate of 1-3℃ / min, and held for 80-100min; the hydrogen flow rate is 30-35L / min throughout the heating process.

8. The method for manufacturing high-viscosity cemented carbide rolls by supercooled isostatic pressing according to claim 1, characterized in that, In step 6), the specific heating process of the vacuum sintering is as follows: the temperature is increased from room temperature to 700-750℃ at a rate of 8-10℃ / min and held for 30-50min; the temperature is increased from 700-750℃ to 1150-1200℃ at a rate of 5-8℃ / min and held for 30-50min; the temperature is increased from 1150-1200℃ to the highest temperature of 1380-1400℃ at a rate of 3-5℃ / min and held for 60-90min; during the vacuum sintering process, the vacuum degree inside the furnace is maintained at 0-5Pa; during the pressure sintering, inert high-pressure argon gas is introduced, and the pressure inside the furnace is maintained at 5-8MPa.

9. The method for manufacturing high-viscosity cemented carbide rolls by supercooled isostatic pressing according to claim 1, characterized in that, In step 6), a fan is used for cooling after the pressure sintering is completed.

10. A high-adhesion phase cemented carbide roll, characterized in that, The high-adhesion phase cemented carbide roll is manufactured by the method of any one of claims 1 to 9.

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