High-molybdenum and high-vanadium material, preparation method thereof and application of high-molybdenum and high-vanadium material to alloy roller

Abstract

The preparation method of the high-molybdenum and high-vanadium material comprises the following steps that raw materials including, by weight, 2.5%-2.6% of carbon, 13%-15% of vanadium, 2.2%-2.4% of molybdenum, 1.1%-1.3% of nickel, 3%-4% of modified chromium powder, 2%-4% of a titanium additive and the balance iron are weighed; the high-molybdenum and high-vanadium material can be obtained by completely smelting the raw materials, then adding the raw materials into a mold for molding for 1 hour under the molding pressure of 100 MPa and then carrying out thermal regulation treatment. According to the high-molybdenum and high-vanadium material, carbon, vanadium, molybdenum, nickel, the modified chromium powder, the titanium additive and the iron raw material are matched and subjected to smelting, forming and reheating regulation improvement, the obtained high-molybdenum and high-vanadium material has the coordinated improvement of wear resistance and plasticity and toughness, and the low-temperature-resistant and corrosion-resistant stability effects of the product are remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of alloy rollers, and in particular to a high-molybdenum and high-vanadium material, a preparation method thereof, and an application thereof in alloy rollers. Background Art

[0002] Alloy rollers are a critical component widely used in industrial production, typically composed of multiple alloying elements to meet diverse operating requirements. Existing alloy rollers often incorporate molybdenum and vanadium to optimize wear resistance. However, this often results in poor plasticity and toughness, as well as low-temperature and corrosion resistance. This limits their efficiency and impacts their application. Consequently, the applicant has developed further improvements to these rollers. Summary of the Invention

[0003] In view of the defects of the prior art, the purpose of the present invention is to provide a high-molybdenum-high-vanadium material and a preparation method thereof and its application in alloy rollers, so as to solve the problems raised in the above background technology.

[0004] The present invention solves the technical problem by adopting the following technical solutions: The present invention provides a method for preparing a high-molybdenum and high-vanadium material, comprising the following steps: Step 1: Weigh the raw materials according to weight percentage: Carbon 2.5-2.6%, vanadium 13-15%, molybdenum 2.2-2.4%, nickel 1.1-1.3%, modified chromium powder 3-4%, titanium additive 2-4% and the balance iron; Step 2: completely melt the above raw materials, then add them into a mold for molding, with a molding pressure of 100 MPa, molding for 1 hour, and then heat conditioning treatment to obtain the high-molybdenum and high-vanadium material of the present invention.

[0005] Preferably, the preparation method of the modified chromium powder is: S01: Preheat the chromium powder at 60-65°C for 1 hour, add the preheated chromium powder to a dopamine hydrochloride solution that is 3-5 times the total amount of the chromium powder, then add a silane coupling agent KH550 that is 5-8% of the total amount of the chromium powder, and stir thoroughly to obtain a chromium dispersion; S02: cerium oxide, silicon dioxide and lanthanum oxide are mixed and sintered in a mass ratio of 2:4:2 at a sintering temperature of 270-280° C. for 1 hour to obtain a modifier; The modifier and the chromium dispersion are stirred in a weight ratio of 3:5, and after stirring is completed, a modified chromium powder is obtained.

[0006] Preferably, the mass fraction of the dopamine hydrochloride solution is 5-8%.

[0007] Preferably, the stirring speed of the stirring treatment is 550-750 r / min, and the stirring time is 1 hour.

[0008] Preferably, the preparation method of the titanium additive is: S11: adding 2-3 parts of carbon nanotubes and 1-3 parts of sodium molybdate to 5-8 parts of yttrium nitrate solution and stirring uniformly to obtain a carbon nanotube solution; Add 3-5 parts of silicon nitride and 1-3 parts of boron powder to 5-8 parts of carbon nanotube solution and mix well to obtain A preparation; S12: treating the titanium powder in plasma for 1 hour, and obtaining plasma-treated titanium powder; treating the plasma-treated titanium powder in A-adjusting agent to obtain A-adjusted titanium liquid; S13: Blend 2-5 parts of rhenium powder, 1-3 parts of sodium carboxymethyl cellulose, and 2-4 parts of niobium powder to obtain a B preparation; S14: The titanium liquid prepared by adjustment A and adjustment B are subjected to adjustment B treatment in a weight ratio of 5:3. After adjustment B is completed, the mixture is filtered and dried to obtain a titanium additive.

[0009] Preferably, the power of the plasma treatment is 450-500W; the mass ratio of the plasma-treated titanium powder and the A adjustment is 3:(5-7); The mass fraction of the yttrium nitrate solution is 5-8%.

[0010] Preferably, the A-adjustment treatment adopts stirring at a speed of 350-400 r / min for 1 hour; and the B-adjustment treatment adopts ball milling at a speed of 1500-1800 r / min for 5 hours.

[0011] Preferably, the specific steps of the thermal conditioning treatment are: S11a: First heat treat at 550-600℃ for 20-30min, then heat to 950-980℃ at a rate of 5-8℃ / min and continue treatment for 15-20min; S11b: then heating to 1020-1050°C at a rate of 2-3°C / min and continuing the treatment for 5-10 minutes; S11c: then reduce the temperature to 650°C at a rate of 1-2°C / min, keep warm for 1 hour, then reduce the temperature to 450°C at a rate of 4-7°C / min, keep warm for 2 hours, and finally air cool to room temperature.

[0012] The present invention also provides a high-molybdenum and high-vanadium material prepared by a method for preparing the high-molybdenum and high-vanadium material.

[0013] The present invention also provides an application of a preparation method of a high-molybdenum and high-vanadium material to an alloy roller.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The high-molybdenum and high-vanadium material of the present invention is prepared by combining carbon, vanadium, molybdenum, nickel, modified chromium powder, titanium additives and iron raw materials through smelting, forming and reheating to improve the obtained high-molybdenum and high-vanadium material. The obtained high-molybdenum and high-vanadium material has coordinated improvements in wear resistance and plasticity and toughness, and the product has significant low-temperature resistance and corrosion resistance stability. 2. The modified chromium powder is preheated and then blended with a dopamine hydrochloride solution and a silane coupling agent, KH550, to improve the dispersion of the chromium powder. A modifier made by blending and sintering cerium oxide, silicon dioxide, and lanthanum oxide is then added to the chromium dispersion, thereby optimizing the coordination between the raw materials in the system. The resulting modified chromium powder enhances the wear resistance and plasticity of the product system, optimizes the performance coordination between the two, and improves the product's low-temperature resistance and corrosion stability. 3. Titanium additives use carbon nanotubes in combination with sodium molybdate and yttrium nitrate solution. The sodium molybdate and yttrium nitrate solution system is carried by high-surface carbon nanotubes. At the same time, silicon nitride and boron powder are added to the carbon nanotube liquid to form an A adjustment. The titanium powder is plasma treated to stimulate its active efficiency, and then the A adjustment is processed by the A adjustment to produce an A-adjusted titanium liquid rich in elements such as titanium, boron and molybdenum. Through hybridization optimization between elements, the performance effect of the system is enhanced and improved. At the same time, rhenium powder, sodium carboxymethyl cellulose and niobium powder are co-formed into a B adjustment. The titanium additive obtained by the B adjustment treatment of the A-adjusted titanium liquid and the B adjustment coordinates and improves the performance effect of the product in the system, and optimizes the performance stability of the product.

[0015] 4. The heat conditioning treatment adopts the steps S11a and S11b to first heat the system at 550-600℃ for 20-30min, then heat it to 950-980℃ at a rate of 5-8℃ / min, continue to treat it for 15-20min and heat it to 1020-1050℃ at a rate of 2-3℃ / min. Through continuous heat heating improvement, at the same time, first heat it at a high rate and then heat it at a low rate, the sufficient and uniform heat conditioning improves the system structure, so that the system structure is more dense. The elements of the strong and system are further strengthened, and then the performance of the product is further improved. Finally, the temperature is reduced to 650℃ at a rate of 1-2℃ / min in S11c, and kept warm for 1h. Then, the temperature is reduced to 450℃ at a rate of 4-7 / min, and kept warm for 2h. By improving the cooling rate at a low rate first and then at a high rate, the cooling of the system structure is further guaranteed to be more uniform and more thorough, and the product density structure is more compact. Through the step-by-step and segmented heating-cooling thermal adjustment improvement, the performance of the product is further improved. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] The method for preparing the high-molybdenum and high-vanadium material of this embodiment comprises the following steps: Step 1: Weigh the raw materials according to weight percentage: Carbon 2.5-2.6%, vanadium 13-15%, molybdenum 2.2-2.4%, nickel 1.1-1.3%, modified chromium powder 3-4%, titanium additive 2-4% and the balance iron; Step 2: completely melt the above raw materials, then add them into a mold for molding, with a molding pressure of 100 MPa, molding for 1 hour, and then heat conditioning treatment to obtain the high-molybdenum and high-vanadium material of the present invention.

[0018] The preparation method of the modified chromium powder of the present embodiment is: S01: Preheat the chromium powder at 60-65°C for 1 hour, add the preheated chromium powder to a dopamine hydrochloride solution that is 3-5 times the total amount of the chromium powder, then add a silane coupling agent KH550 that is 5-8% of the total amount of the chromium powder, and stir thoroughly to obtain a chromium dispersion; S02: cerium oxide, silicon dioxide and lanthanum oxide are mixed and sintered in a mass ratio of 2:4:2 at a sintering temperature of 270-280° C. for 1 hour to obtain a modifier; The modifier and the chromium dispersion are stirred in a weight ratio of 3:5, and after stirring is completed, a modified chromium powder is obtained.

[0019] The mass fraction of the dopamine hydrochloride solution in this embodiment is 5-8%.

[0020] The stirring speed of the stirring process in this embodiment is 550-750 r / min, and the stirring is performed for 1 hour.

[0021] The preparation method of the titanium additive of this embodiment is: S11: adding 2-3 parts of carbon nanotubes and 1-3 parts of sodium molybdate to 5-8 parts of yttrium nitrate solution and stirring uniformly to obtain a carbon nanotube solution; Add 3-5 parts of silicon nitride and 1-3 parts of boron powder to 5-8 parts of carbon nanotube solution and mix well to obtain A preparation; S12: treating the titanium powder in plasma for 1 hour, and obtaining plasma-treated titanium powder; treating the plasma-treated titanium powder in A-adjusting agent to obtain A-adjusted titanium liquid; S13: Blend 2-5 parts of rhenium powder, 1-3 parts of sodium carboxymethyl cellulose, and 2-4 parts of niobium powder to obtain a B preparation; S14: The titanium liquid prepared by adjustment A and adjustment B are subjected to adjustment B treatment in a weight ratio of 5:3. After adjustment B is completed, the mixture is filtered and dried to obtain a titanium additive.

[0022] The power of the plasma treatment in this embodiment is 450-500W; the mass ratio of the plasma-treated titanium powder and the A adjustment agent is 3: (5-7); The mass fraction of the yttrium nitrate solution is 5-8%.

[0023] In the A-conditioning treatment of this embodiment, stirring was performed at a rotation speed of 350-400 r / min for 1 hour; and ball milling was performed at a rotation speed of 1500-1800 r / min for 5 hours in the B-conditioning treatment.

[0024] The specific steps of the thermal regulation process in this embodiment are: S11a: First heat treat at 550-600℃ for 20-30min, then heat to 950-980℃ at a rate of 5-8℃ / min and continue treatment for 15-20min; S11b: then heating to 1020-1050°C at a rate of 2-3°C / min and continuing the treatment for 5-10 minutes; S11c: then reduce the temperature to 650°C at a rate of 1-2°C / min, keep warm for 1 hour, then reduce the temperature to 450°C at a rate of 4-7°C / min, keep warm for 2 hours, and finally air cool to room temperature.

[0025] The high-molybdenum and high-vanadium material is prepared by a preparation method of a high-molybdenum and high-vanadium material in this embodiment.

[0026] This embodiment provides an application of a method for preparing a high-molybdenum and high-vanadium material to an alloy roller.

[0027] Example 1. The method for preparing the high-molybdenum and high-vanadium material of this embodiment comprises the following steps: Step 1: Weigh the raw materials according to weight percentage: Carbon 2.5%, vanadium 13%, molybdenum 2.2%, nickel 1.1%, modified chromium powder 3%, titanium additive 2% and the balance iron; Step 2: completely melt the above raw materials, then add them into a mold for molding, with a molding pressure of 100 MPa, molding for 1 hour, and then heat conditioning treatment to obtain the high-molybdenum and high-vanadium material of the present invention.

[0028] The preparation method of the modified chromium powder of the present embodiment is: S01: Preheat the chromium powder at 60°C for 1 hour, add the preheated chromium powder to a dopamine hydrochloride solution at a concentration of 3 times the total amount of the chromium powder, then add a silane coupling agent KH550 at a concentration of 5% of the total amount of the chromium powder, and stir thoroughly to obtain a chromium dispersion. S02: cerium oxide, silicon dioxide and lanthanum oxide are mixed and sintered in a mass ratio of 2:4:2 at a sintering temperature of 270° C. for 1 hour to obtain a modifier; The modifier and the chromium dispersion are stirred in a weight ratio of 3:5, and after stirring is completed, a modified chromium powder is obtained.

[0029] The mass fraction of the dopamine hydrochloride solution in this embodiment is 5%.

[0030] The stirring speed of the stirring process in this embodiment is 550 r / min, and the stirring is carried out for 1 hour.

[0031] The preparation method of the titanium additive of this embodiment is: S11: adding 2 parts of carbon nanotubes and 1 part of sodium molybdate to 5 parts of yttrium nitrate solution and stirring uniformly to obtain a carbon nanotube solution; Add 3 parts of silicon nitride and 1 part of boron powder to 5 parts of carbon nanotube solution and mix well to obtain A preparation; S12: treating the titanium powder in plasma for 1 hour, and obtaining plasma-treated titanium powder; treating the plasma-treated titanium powder in A-adjusting agent to obtain A-adjusted titanium liquid; S13: Blend 2 parts of rhenium powder, 1 part of sodium carboxymethyl cellulose, and 2 parts of niobium powder to obtain a B preparation; S14: The titanium liquid prepared by adjustment A and adjustment B are subjected to adjustment B treatment in a weight ratio of 5:3. After adjustment B is completed, the mixture is filtered and dried to obtain a titanium additive.

[0032] The power of the plasma treatment in this embodiment is 450W; the mass ratio of the plasma-treated titanium powder and the A adjustment is 3:5; The mass fraction of the yttrium nitrate solution is 5%.

[0033] In this embodiment, the A-conditioning treatment adopts stirring at a speed of 350 r / min for 1 hour; the B-conditioning treatment adopts ball milling at a speed of 1500 r / min for 5 hours.

[0034] The specific steps of the thermal regulation process in this embodiment are: S11a: first heat treatment at 550 °C for 20 min, then heating to 950 °C at a rate of 5 °C / min and continuing treatment for 15 min; S11b: then the temperature is raised to 1020°C at a rate of 2°C / min and the treatment is continued for 5 min; S11c: then reduce the temperature to 650°C at a rate of 1°C / min, keep warm for 1 hour, then reduce the temperature to 450°C at a rate of 4°C / min, keep warm for 2 hours, and finally air cool to room temperature.

[0035] The high-molybdenum and high-vanadium material is prepared by a preparation method of a high-molybdenum and high-vanadium material in this embodiment.

[0036] This embodiment provides an application of a method for preparing a high-molybdenum and high-vanadium material to an alloy roller.

[0037] Example 2. The method for preparing the high-molybdenum and high-vanadium material of this embodiment comprises the following steps: Step 1: Weigh the raw materials according to weight percentage: Carbon 2.6%, vanadium 15%, molybdenum 2.4%, nickel 1.3%, modified chromium powder 4%, titanium additive 2-4% and the balance iron; Step 2: completely melt the above raw materials, then add them into a mold for molding, with a molding pressure of 100 MPa, molding for 1 hour, and then heat conditioning treatment to obtain the high-molybdenum and high-vanadium material of the present invention.

[0038] The preparation method of the modified chromium powder of the present embodiment is: S01: Preheat the chromium powder at 65°C for 1 hour, add the preheated chromium powder to a dopamine hydrochloride solution with a volume 5 times the total volume of the chromium powder, then add a silane coupling agent KH550 with a volume 8% of the total volume of the chromium powder, and stir thoroughly to obtain a chromium dispersion. S02: cerium oxide, silicon dioxide and lanthanum oxide are mixed and sintered in a mass ratio of 2:4:2 at a sintering temperature of 280° C. for 1 hour to obtain a modifier; The modifier and the chromium dispersion are stirred in a weight ratio of 3:5, and after stirring is completed, a modified chromium powder is obtained.

[0039] The mass fraction of the dopamine hydrochloride solution in this embodiment is 8%.

[0040] The stirring speed of the stirring process in this embodiment is 750 r / min, and the stirring is carried out for 1 hour.

[0041] The preparation method of the titanium additive of this embodiment is: S11: adding 3 parts of carbon nanotubes and 3 parts of sodium molybdate to 8 parts of yttrium nitrate solution and stirring uniformly to obtain a carbon nanotube solution; Add 5 parts of silicon nitride and 3 parts of boron powder to 8 parts of carbon nanotube solution and mix well to obtain A preparation; S12: treating the titanium powder in plasma for 1 hour, and obtaining plasma-treated titanium powder; treating the plasma-treated titanium powder in A-adjusting agent to obtain A-adjusted titanium liquid; S13: Blend 5 parts of rhenium powder, 3 parts of sodium carboxymethyl cellulose, and 4 parts of niobium powder to obtain a B preparation; S14: The titanium liquid prepared by adjustment A and adjustment B are subjected to adjustment B treatment in a weight ratio of 5:3. After adjustment B is completed, the mixture is filtered and dried to obtain a titanium additive.

[0042] The power of the plasma treatment in this embodiment is 500W; the mass ratio of the plasma-treated titanium powder and the A adjustment is 3:7; The mass fraction of the yttrium nitrate solution is 8%.

[0043] In the A-conditioning treatment of this embodiment, stirring was performed at a speed of 400 r / min for 1 h; and ball milling was performed at a speed of 1800 r / min for 5 h in the B-conditioning treatment.

[0044] The specific steps of the thermal regulation process in this embodiment are: S11a: First heat treatment at 600 °C for 30 min, then heating to 980 °C at a rate of 8 °C / min and continuing treatment for 20 min; S11b: then the temperature is raised to 1050°C at a rate of 3°C / min and the treatment is continued for 10 min; S11c: then reduce the temperature to 650°C at a rate of 2°C / min, keep warm for 1 hour, then reduce the temperature to 450°C at a rate of 7°C / min, keep warm for 2 hours, and finally air cool to room temperature.

[0045] The high-molybdenum and high-vanadium material is prepared by a preparation method of a high-molybdenum and high-vanadium material in this embodiment.

[0046] This embodiment provides an application of a method for preparing a high-molybdenum and high-vanadium material to an alloy roller.

[0047] Example 3. The method for preparing the high-molybdenum and high-vanadium material of this embodiment comprises the following steps: Step 1: Weigh the raw materials according to weight percentage: Carbon 2.55%, vanadium 14%, molybdenum 2.3%, nickel 1.2%, modified chromium powder 3.5%, titanium additive 3% and the balance iron; Step 2: completely melt the above raw materials, then add them into a mold for molding, with a molding pressure of 100 MPa, molding for 1 hour, and then heat conditioning treatment to obtain the high-molybdenum and high-vanadium material of the present invention.

[0048] The preparation method of the modified chromium powder of the present embodiment is: S01: Preheat the chromium powder at 62.5°C for 1 hour, add the preheated chromium powder to a dopamine hydrochloride solution with a volume 4 times the total volume of the chromium powder, and then add a silane coupling agent KH550 with a volume 6.5% of the total volume of the chromium powder, and stir thoroughly to obtain a chromium dispersion. S02: cerium oxide, silicon dioxide and lanthanum oxide are mixed and sintered in a mass ratio of 2:4:2 at a sintering temperature of 275° C. for 1 hour to obtain a modifier; The modifier and the chromium dispersion are stirred in a weight ratio of 3:5, and after stirring is completed, a modified chromium powder is obtained.

[0049] The mass fraction of the dopamine hydrochloride solution in this embodiment is 6.5%.

[0050] The stirring speed of the stirring process in this embodiment is 600 r / min, and the stirring is carried out for 1 hour.

[0051] The preparation method of the titanium additive of this embodiment is: S11: adding 2.5 parts of carbon nanotubes and 2 parts of sodium molybdate to 6.5 parts of yttrium nitrate solution and stirring uniformly to obtain a carbon nanotube solution; Add 4 parts of silicon nitride and 2 parts of boron powder to 6.5 parts of carbon nanotube solution and mix well to obtain A preparation; S12: treating the titanium powder in plasma for 1 hour, and obtaining plasma-treated titanium powder; treating the plasma-treated titanium powder in A-adjusting agent to obtain A-adjusted titanium liquid; S13: 3.5 parts of rhenium powder, 2 parts of sodium carboxymethyl cellulose, and 3 parts of niobium powder are uniformly blended to obtain a B preparation; S14: The titanium liquid prepared by adjustment A and adjustment B are subjected to adjustment B treatment in a weight ratio of 5:3. After adjustment B is completed, the mixture is filtered and dried to obtain a titanium additive.

[0052] The power of the plasma treatment in this embodiment is 470W; the mass ratio of the plasma-treated titanium powder and the A adjustment is 3:6; The mass fraction of the yttrium nitrate solution is 6.5%.

[0053] In this embodiment, the A-conditioning treatment adopts stirring at a speed of 370 r / min for 1 hour; the B-conditioning treatment adopts ball milling at a speed of 1650 r / min for 5 hours.

[0054] The specific steps of the thermal regulation process in this embodiment are: S11a: Heat treatment at 575°C for 25 min, then heating to 965°C at a rate of 6.5°C / min for 17.5 min. S11b: then the temperature was raised to 1035°C at a rate of 2.5°C / min and the treatment was continued for 7.5 min; S11c: then reduce the temperature to 650°C at a rate of 1.5°C / min, keep warm for 1 hour, then reduce the temperature to 450°C at a rate of 5.5°C / min, keep warm for 2 hours, and finally air cool to room temperature.

[0055] The high-molybdenum and high-vanadium material is prepared by a preparation method of a high-molybdenum and high-vanadium material in this embodiment.

[0056] This embodiment provides an application of a method for preparing a high-molybdenum and high-vanadium material to an alloy roller.

[0057] Comparative Example 1. The difference from Example 3 is that no modified chromium powder is added.

[0058] Comparative Example 2. The difference from Example 3 is that no modifier is added in the preparation of the modified chromium powder.

[0059] Comparative Example 3. The difference from Example 3 is that no cerium oxide or silicon dioxide is added to the modifier.

[0060] Comparative Example 4. The difference from Example 3 is that no chromium dispersion is added during the preparation of the modified chromium powder.

[0061] Comparative Example 5. The difference from Example 3 is that no preheated chromium powder is added to the chromium dispersion.

[0062] Comparative Example 6. The difference from Example 3 is that no titanium additive is added.

[0063] Comparative Example 7. The difference from Example 3 is that the titanium liquid with A is not added in the preparation of the titanium additive.

[0064] Comparative Example 8. The difference from Example 3 is that no A-adjusting agent is added to the A-adjusting titanium liquid.

[0065] Comparative Example 9. The difference from Example 3 is that no B adjustment agent is added during the preparation of the titanium additive.

[0066] Comparative Example 10. The difference from Example 3 is that the specific operation steps of the thermal conditioning treatment are different: S11a: directly increase the temperature to 1035°C at a rate of 2.5°C / min and continue the treatment for 7.5 min; S11b: then reduce the temperature to 650°C at a rate of 1.5°C / min, keep warm for 1 hour, then reduce the temperature to 450°C at a rate of 5.5°C / min, keep warm for 2 hours, and finally air cool to room temperature. Step S11a was not used.

[0067] Comparative Example 11. The difference from Example 3 is that the specific operation steps of the thermal conditioning treatment are different: The specific steps of thermal conditioning are as follows: S11a: Heat treatment at 575°C for 25 min, then heating to 965°C at a rate of 6.5°C / min for 17.5 min. S11b: Then the temperature was raised to 1035°C at a rate of 2.5°C / min, the treatment was continued for 7.5 minutes, and finally air-cooled to room temperature. The steps of reducing the temperature to 650°C at a rate of 1.5°C / min, keeping the temperature for 1 hour, and then reducing the temperature to 450°C at a rate of 5.5°C / min and keeping the temperature for 2 hours were not adopted.

[0068] The products of Examples 1-3 and Comparative Examples 1-11 were tested for wear resistance (using a wear tester with a load of 20 N, wear time of 100 min, wear rate of 15 m / min, and wear distance of 1500 mm) and plastic toughness under normal conditions, as well as for low temperature resistance and corrosion resistance. The performance measurement results are as follows:

[0069] From Examples 1-3 and Comparative Examples 1-11, The product of Example 3 of the present invention has excellent wear rate performance under normal conditions, with the lowest wear rate reaching 3.1×10 mm / Nm, as well as significant elongation and fracture toughness properties, the product can achieve coordinated improvements in wear resistance and plastic toughness. At the same time, the product has excellent performance stability under low temperature resistance and corrosion resistance conditions; From Comparative Example 1, Comparative Example 6 and Example 3, it can be seen that when neither the modified chromium powder nor the titanium additive is added to the product, the performance of the product deteriorates significantly, especially under corrosion resistance conditions, the performance stability deteriorates significantly. By using the modified chromium powder and the titanium additive in combination, the performance effect of the product is significant. As can be seen from Comparative Examples 2-5 and Example 3, the performance of the products of the modified chromium powders prepared without adding a modifier, without adding cerium oxide or silicon dioxide to the modifier, without adding a chromium dispersion, and without adding preheated chromium powder to the chromium dispersion all showed a trend of deterioration to varying degrees. Only the modified chromium powder prepared by combining the chromium dispersion obtained by the method of the present invention with the modifier showed the most significant performance effect. As can be seen from Comparative Examples 7-9, the performance of the products without adding A-adjusted titanium liquid, without adding A-adjusting agent and A-adjusting treatment to the titanium liquid, and without adding B-adjusting agent in the preparation of the titanium additive all showed a trend of deterioration. The performance of the titanium additive prepared by combining A-adjusted titanium liquid obtained by a specific method with B-adjusting agent was the most obvious. The performance of the product without adding A-adjusting agent and A-adjusting treatment to the titanium liquid also showed a relatively obvious trend of deterioration. At the same time, it can be seen from Comparative Examples 10-11 that the specific operating steps of the thermal conditioning treatment are different, and the performance of the product also shows a trend of deterioration to varying degrees. Only the thermal conditioning treatment obtained by the specific process of the present invention can achieve the most significant performance effect of the product.

[0070] Based on the above tests, we continue to test the impact of A adjustment on product performance: Experimental Example 1. The same as Example 3, except that silicon nitride is not added to the A preparation.

[0071] Experimental Example 2. The same as Example 3, the only difference is that no boron powder is added to the A preparation.

[0072] Experimental Example 3. The same as Example 3, except that no carbon nanotube liquid is added to the A preparation.

[0073] Experimental Example 4. The same as Example 3, except that no carbon nanotubes are added to the carbon nanotube solution.

[0074] Experimental Example 5. The same as Example 3, except that sodium molybdate is not added to the carbon nanotube solution and water is used instead of the yttrium nitrate solution.

[0075] The product performance tests of Experimental Examples 1-5 are as follows:

[0076] It can be seen from Experimental Examples 1-5 that when no carbon nanotube liquid is added to the A preparation, the performance of the product deteriorates significantly under normal conditions, and when no silicon nitride is added to the A preparation, the performance stability of the product deteriorates significantly under low temperature resistance and corrosion resistance conditions; and when no boron powder is added to the A preparation, no carbon nanotubes are added to the carbon nanotube liquid, no sodium molybdate is added to the carbon nanotube liquid, and the yttrium nitrate solution is replaced by water, the performance of the product tends to deteriorate to varying degrees. Only the A preparation prepared by the method of the present invention has the most significant product performance effect, and the effects of other replacement methods are not as significant as those of the present invention.

[0077] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0078] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for preparing a high-molybdenum and high-vanadium material, characterized in that: The following steps are involved: Step 1: Weigh the raw materials according to weight percentage: Carbon 2.5-2.6%, vanadium 13-15%, molybdenum 2.2-2.4%, nickel 1.1-1.3%, modified chromium powder 3-4%, titanium additive 2-4% and the balance iron; Step 2: completely melt the above raw materials, then add them into a mold for molding, with a molding pressure of 100 MPa, molding for 1 hour, and then heat conditioning treatment to obtain the high-molybdenum and high-vanadium material of the present invention.

2. The method for preparing the high-molybdenum and high-vanadium material according to claim 1, wherein: The preparation method of the modified chromium powder is: S01: Preheat the chromium powder at 60-65°C for 1 hour, add the preheated chromium powder to a dopamine hydrochloride solution that is 3-5 times the total amount of the chromium powder, then add a silane coupling agent KH550 that is 5-8% of the total amount of the chromium powder, and stir thoroughly to obtain a chromium dispersion; S02: cerium oxide, silicon dioxide and lanthanum oxide are mixed and sintered in a mass ratio of 2:4:2 at a sintering temperature of 270-280° C. for 1 hour to obtain a modifier; The modifier and the chromium dispersion are stirred in a weight ratio of 3:5, and after stirring is completed, a modified chromium powder is obtained.

3. The method for preparing the high-molybdenum and high-vanadium material according to claim 2, wherein: The mass fraction of the dopamine hydrochloride solution is 5-8%.

4. The method for preparing the high-molybdenum and high-vanadium material according to claim 2, wherein: The stirring speed of the stirring treatment is 550-750 r / min, and the stirring is performed for 1 hour.

5. The method for preparing the high-molybdenum and high-vanadium material according to claim 1, wherein: The preparation method of the titanium additive is: S11: adding 2-3 parts of carbon nanotubes and 1-3 parts of sodium molybdate to 5-8 parts of yttrium nitrate solution and stirring uniformly to obtain a carbon nanotube solution; Add 3-5 parts of silicon nitride and 1-3 parts of boron powder to 5-8 parts of carbon nanotube solution and mix well to obtain A preparation; S12: treating the titanium powder in plasma for 1 hour, and obtaining plasma-treated titanium powder; treating the plasma-treated titanium powder in A-adjusting agent to obtain A-adjusted titanium liquid; S13: Blend 2-5 parts of rhenium powder, 1-3 parts of sodium carboxymethyl cellulose, and 2-4 parts of niobium powder to obtain a B preparation; S14: The titanium liquid prepared by adjustment A and adjustment B are subjected to adjustment B treatment in a weight ratio of 5:

3. After adjustment B is completed, the mixture is filtered and dried to obtain a titanium additive.

6. The method for preparing the high-molybdenum and high-vanadium material according to claim 5, characterized in that: The power of the plasma treatment is 450-500W; the mass ratio of the plasma-treated titanium powder and the A adjustment agent is 3: (5-7); The mass fraction of the yttrium nitrate solution is 5-8%.

7. The method for preparing the high-molybdenum and high-vanadium material according to claim 5, characterized in that: The A-adjustment treatment adopts stirring at a speed of 350-400 r / min for 1 hour; the B-adjustment treatment adopts ball milling at a speed of 1500-1800 r / min for 5 hours.

8. The method for preparing the high-molybdenum and high-vanadium material according to claim 1, wherein: The specific steps of thermal conditioning are as follows: S11a: First heat treat at 550-600℃ for 20-30min, then heat to 950-980℃ at a rate of 5-8℃ / min and continue treatment for 15-20min; S11b: then heating to 1020-1050°C at a rate of 2-3°C / min and continuing the treatment for 5-10 minutes; S11c: then reduce the temperature to 650°C at a rate of 1-2°C / min, keep warm for 1 hour, then reduce the temperature to 450°C at a rate of 4-7°C / min, keep warm for 2 hours, and finally air cool to room temperature.

9. A high-molybdenum and high-vanadium material prepared by the method for preparing a high-molybdenum and high-vanadium material according to any one of claims 1 to 8.

10. Use of the preparation method of the high-molybdenum and high-vanadium material according to any one of claims 1 to 8 in an alloy roller.

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