Spheroidal graphite alloy composite roller and preparation process thereof

Abstract

The invention relates to the technical field of rollers, in particular to a spheroidal graphite alloy composite roller and a preparation process thereof.The spheroidal graphite alloy composite roller comprises a roller core and a roller body working layer, and the roller body working layer comprises, by weight, 3-5 parts of C, 35-40 parts of Fe, 1-3 parts of Si, 2-4 parts of Mn, 1-3 parts of V, 2-4 parts of Ni, 2-4 parts of Cr and 3-5 parts of a hardening and tempering agent. According to the spheroidal graphite alloy composite roller, C, Fe, Si and other raw materials are adopted for blending the tempering agent, the irradiation cerium agent in the tempering agent is matched with the composite modification liquid for stirring improvement treatment, the wear resistance, the tensile property and the impact property of the obtained product are improved in a coordinated mode, and meanwhile the temperature change resistance and the corrosion resistance stability effect of the product are remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling rolls, and particularly relates to a ductile alloy composite rolling roll and a preparation process thereof. Background Art

[0002] The main working component and tool for causing continuous plastic deformation of metal on a rolling mill, the rolling roll mainly consists of three parts: the roll body, the roll neck and the shaft head. The roll body is the middle part of the rolling roll that actually participates in rolling the metal. It has a smooth cylindrical or grooved surface.

[0003] Existing rolling roll products are made by compounding a roll core and a working layer of the roll body. The wear resistance of the working layer of the roll body is poor. In order to improve the wear resistance of the product, it is easy to cause poor tensile properties and impact properties of the product. At the same time, the product has poor temperature change resistance and corrosion resistance stability, which limits the use efficiency of the product. Based on this, the present invention makes further improvement treatment. Summary of the Invention

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a ductile alloy composite rolling roll and a preparation process thereof to solve the problems raised in the above background art.

[0005] The present invention adopts the following technical solutions to solve the technical problems: The present invention provides a ductile alloy composite rolling roll, including a roll core and a working layer of the roll body. The working layer of the roll body includes the following raw materials in parts by weight: 3-5 parts of C, 35-40 parts of Fe, 1-3 parts of Si, 2-4 parts of Mn, 1-3 parts of V, 2-4 parts of Ni, 2-4 parts of Cr, and 3-5 parts of a quenching and tempering agent.

[0006] Preferably, the ductile alloy composite rolling roll includes the following raw materials in parts by weight: 4 parts of C, 37.5 parts of Fe, 2 parts of Si, 3 parts of Mn, 2 parts of V, 3 parts of Ni, 3 parts of Cr, and 4 parts of a quenching and tempering agent.

[0007] Preferably, the preparation method of the quenching and tempering agent is as follows: S01: Irradiate cerium powder in a proton irradiation chamber for 1 h, with an irradiation power of 350-400 W. After irradiation, the irradiated cerium agent is obtained; S02: First, prepare a lanthanum chloride solution with a mass fraction of 2-5% and a chitosan solution with a mass fraction of 3-4%; then add 3-5 parts of alumina and 2-4 parts of the lanthanum chloride solution to 5-8 parts of the chitosan solution, and then add 2-3 parts of nano TaC and mix well to obtain a complex modified liquid; S03: Stir the irradiated cerium agent and the complex modified liquid according to a weight ratio of 2:5. After stirring, filter and dry to obtain the quenching and tempering agent.

[0008] Preferably, the stirring speed of the stirring treatment is 350 - 450 r / min, stirring for 20 min, and the stirring temperature is 50 - 55 °C.

[0009] The present invention also provides a preparation process of a ductile alloy composite roll, comprising the following steps: C, Fe, Si, Mn, V, Ni, Cr and a quenching and tempering agent are blended and added to a melting furnace for complete melting. After melting is completed, it is cooled and shaped, and then ball-milled through 100 meshes to obtain ball-milled powder; The ball-milled powder is sprayed onto the surface of the roll core by plasma spraying technology to obtain a roll body; the spraying voltage is 100 V, and the thickness of the sprayed layer is 3 - 5 mm; finally, the roll body is subjected to thermal improvement adjustment treatment to obtain the ductile alloy composite roll of the present invention.

[0010] Preferably, the specific operation steps of the thermal improvement adjustment treatment are as follows: S101: Heat-treat the roll body at 210 - 230 °C for 1 h, then heat it up to 1050 °C at a rate of 2 - 5 °C / min, keep it warm for 20 min, and then cool it to 60 °C at a rate of 1 - 3 °C / min for heat preservation treatment; S102: Immerse the heat-preserved roll body into a sufficient amount of ultrasonic liquid for ultrasonic modification treatment. After ultrasonic treatment is completed, dry it, and then subject the dried product of S102 to reheat temperature treatment, and that's it; The specific operation steps of the reheat temperature treatment are as follows: First, heat it up to 550 - 570 °C at a rate of 5 - 7 °C / min, keep it warm for 20 min, and finally cool it to 350 °C at a rate of 4 °C / min, continue to keep it warm for 1 h, and finally air-cool it to room temperature.

[0011] Preferably, the ultrasonic power of the ultrasonic modification treatment is 400 - 500 W, and ultrasonic treatment is carried out for 20 min.

[0012] Preferably, the preparation method of the ultrasonic liquid is as follows: First, preheat niobium nitride at a temperature of 50 - 55 °C for 1 h, and then add 3 - 5 parts of the preheated niobium nitride to 5 - 8 parts of a pre-adjusted liquid and stir well to obtain the ultrasonic liquid; The pre-adjusted liquid comprises the following raw materials in parts by weight: 2 - 3 parts of nano-titanium dioxide, 4 - 6 parts of dopamine hydrochloride solution, 1 - 2 parts of barium nitrate aqueous solution, and 3 - 4 parts of carbon nanotubes.

[0013] Preferably, the mass fraction of the dopamine hydrochloride solution is 2 - 5%.

[0014] Preferably, the mass fraction of the barium nitrate aqueous solution is 3 - 4%.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The ductile alloy composite roller of the present invention adopts C, Fe, Si and other raw materials to blend the conditioning agent. The irradiated cerium agent in the conditioning agent is mixed with the complex modified liquid for stirring and improving treatment. The wear resistance, tensile resistance and impact resistance of the obtained product are coordinated and improved. At the same time, the product has remarkable effects on temperature change resistance and corrosion resistance stability. 2. The irradiated cerium agent uses cerium powder to be irradiated by protons to optimize its activity performance, and then improves it through the coordination of a complex modified liquid. The alumina, lanthanum chloride solution, chitosan solution and nano-TaC in the complex modified liquid are blended and blended. Through the coordination between the raw materials, the complex modified liquid is better coordinated and optimized to optimize the irradiated cerium agent, so that the conditioning agent in the system enhances the interface of the system raw materials and enhances the density of the product, so that the performance of the product is further improved; 3. Heat improvement and conditioning treatment: The roller body is heat treated at 210-230℃ for 1h, then heated to 1050℃ at a rate of 2-5℃ / min, kept warm for 20min, and then cooled to 60℃ at a rate of 1-3℃ / min. The heat treatment is carried out in steps and sections to enhance the density of the product system structure and to fully sinter, thereby further improving the performance of the product. The ultrasonic modification treatment in the ultrasonic liquid is then combined. The niobium nitride in the ultrasonic liquid is first preheated at 50-55℃ for 1h, and then stirred sufficiently in the pre-adjusted liquid. The nano- Titanium dioxide, dopamine hydrochloride solution, barium nitrate aqueous solution and carbon nanotubes are blended and adjusted, and the raw materials are adjusted and complemented, so as to further fill the ultrasonic liquid to improve the composite roller system, and finally cooperate with heat recovery treatment. In the heat recovery treatment, the temperature is first increased to 550-570°C at a rate of 5-7°C / min, and the temperature is kept for 20 minutes. Finally, the temperature is lowered to 350°C at a rate of 4°C / min, and the temperature is kept for 1 hour. The rollers are further coordinated and improved in a heat homogenization and heat uniformity manner. Through the specific heat improvement and adjustment treatment of the present invention, the product performance 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 creative work are within the scope of protection of the present invention.

[0017] A ductile alloy composite roller of this embodiment includes a roller core and a roller body working layer, and the roller body working layer includes the following raw materials in parts by weight: C 3~5 parts, Fe 35~40 parts, Si 1~3 parts, Mn 2~4 parts, V 1~3 parts, Ni 2~4 parts, Cr 2~4 parts and tempering agent 3~5 parts.

[0018] The ductile alloy composite roll of this embodiment comprises the following raw materials in parts by weight: 4 parts of C, 37.5 parts of Fe, 2 parts of Si, 3 parts of Mn, 2 parts of V, 3 parts of Ni, 3 parts of Cr and 4 parts of quenching and tempering agent.

[0019] The preparation method of the quenching and tempering agent of this embodiment is as follows: S01: Irradiate cerium powder in a proton irradiation chamber for 1 h at an irradiation power of 350 - 400 W. After irradiation, the irradiated cerium agent is obtained; S02: First, prepare a lanthanum chloride solution with a mass fraction of 2 - 5% and a chitosan solution with a mass fraction of 3 - 4%; then add 3 - 5 parts of alumina and 2 - 4 parts of the lanthanum chloride solution to 5 - 8 parts of the chitosan solution, and then add 2 - 3 parts of nano TaC and mix well to obtain a composite modified liquid; S03: Stir the irradiated cerium agent and the composite modified liquid in a weight ratio of 2:5. After stirring, filter and dry to obtain the quenching and tempering agent.

[0020] The stirring speed of the stirring treatment in this embodiment is 350 - 450 r / min, stir for 20 min, and the stirring temperature is 50 - 55 °C.

[0021] The preparation process of a ductile alloy composite roll of this embodiment comprises the following steps: Mix C, Fe, Si, Mn, V, Ni, Cr and the quenching and tempering agent and add them to a melting furnace for complete melting. After melting, cool and shape, and then ball mill through 100 meshes to obtain ball mill powder; Spray the ball mill powder onto the surface of the roll core by plasma spraying technology to obtain a roll body; the spraying voltage is 100 V, and the thickness of the sprayed layer is 3 - 5 mm; finally, perform heat improvement and adjustment treatment on the roll body to obtain the ductile alloy composite roll of the present invention.

[0022] The specific operation steps of the heat improvement and adjustment treatment in this embodiment are as follows: S101: Heat - treat the roll body at 210 - 230 °C for 1 h, then heat - up at a rate of 2 - 5 °C / min to 1050 °C, keep warm for 20 min, and then cool at a rate of 1 - 3 °C / min to 60 °C for heat preservation treatment; S102: Immerse the heat - preserved roll body in a sufficient amount of ultrasonic liquid for ultrasonic modification treatment. After ultrasonic treatment, dry it, and then perform heat re - warming treatment on the dried product of S102; The specific operation steps of the heat re - warming treatment are as follows: First, heat - up at a rate of 5 - 7 °C / min to 550 - 570 °C, keep warm for 20 min, finally cool at a rate of 4 °C / min to 350 °C, continue to keep warm for 1 h, and finally air - cool to room temperature.

[0023] The ultrasonic power for the ultrasonic modification treatment in this embodiment is 400 - 500 W, and the ultrasonic treatment lasts for 20 min.

[0024] The preparation method of the ultrasonic solution in this embodiment is as follows: First preheat niobium nitride at a temperature of 50 - 55 °C for 1 h, and then add 3 - 5 parts of the preheated niobium nitride to 5 - 8 parts of the pre - adjusted solution and stir well to obtain the ultrasonic solution; The pre - adjusted solution includes the following raw materials in parts by weight: 2 - 3 parts of nano - titanium dioxide, 4 - 6 parts of dopamine hydrochloride solution, 1 - 2 parts of barium nitrate aqueous solution, and 3 - 4 parts of carbon nanotubes.

[0025] The mass fraction of the dopamine hydrochloride solution in this embodiment is 2 - 5%.

[0026] The mass fraction of the barium nitrate aqueous solution in this embodiment is 3 - 4%.

[0027] Example 1. A ductile alloy composite roll in this embodiment includes a roll core and a roll body working layer. The roll body working layer includes the following raw materials in parts by weight: 3 parts of C, 35 parts of Fe, 1 part of Si, 2 parts of Mn, 1 part of V, 2 parts of Ni, 2 parts of Cr, and 3 parts of a quenching and tempering agent.

[0028] The preparation method of the quenching and tempering agent in this embodiment is as follows: S01: Irradiate cerium powder in a proton irradiation chamber for 1 h, with an irradiation power of 350 W. After irradiation, obtain the irradiated cerium agent; S02: First prepare a lanthanum chloride solution with a mass fraction of 2% and a chitosan solution with a mass fraction of 3%; then add 3 parts of alumina and 2 parts of the lanthanum chloride solution to 5 parts of the chitosan solution, and then add 2 parts of nano - TaC and mix well to obtain a complex - modified solution; S03: Stir - process the irradiated cerium agent and the complex - modified solution according to a weight ratio of 2:5. After stirring, filter and dry to obtain the quenching and tempering agent.

[0029] The stirring speed for the stirring treatment in this embodiment is 350 r / min, the stirring lasts for 20 min, and the stirring temperature is 50 °C.

[0030] A preparation process of a ductile alloy composite roll in this embodiment includes the following steps: Mix C, Fe, Si, Mn, V, Ni, Cr, and the quenching and tempering agent and add them to a melting furnace for complete melting. After melting, cool and shape, and then ball - mill through 100 - mesh to obtain ball - milled powder; Spray the ball - milled powder onto the surface of the roll core using plasma spraying technology to obtain a roll body; the spraying voltage is 100 V, and the thickness of the sprayed layer is 3 mm; finally, perform heat improvement and adjustment treatment on the roll body to obtain the ductile alloy composite roll of the present invention.

[0031] The specific operation steps of the thermal improvement adjustment treatment in this embodiment are as follows: S101: Heat-treat the roll body at 210°C for 1 h, then raise the temperature to 1050°C at a rate of 2°C / min, hold for 20 min, and then cool to 60°C at a rate of 1°C / min for heat preservation treatment; S102: Immerse the heat-preserved roll body in a sufficient amount of ultrasonic liquid for ultrasonic modification treatment. After the ultrasonic treatment is completed, dry it, and then reheat the dried product of S102, and that's it; The specific operation steps of the reheating treatment are as follows: First, raise the temperature to 550°C at a rate of 5°C / min, hold for 20 min, and finally cool to 350°C at a rate of 4°C / min and continue to hold for 1 h, and finally air-cool to room temperature.

[0032] In this embodiment, the ultrasonic power of the ultrasonic modification treatment is 400 W and the ultrasonic treatment is for 20 min.

[0033] The preparation method of the ultrasonic liquid in this embodiment is as follows: Preheat niobium nitride at a temperature of 50°C for 1 h, and then add 3 parts of the preheated niobium nitride to 5 parts of the pre-adjusted liquid and stir well to obtain the ultrasonic liquid; The pre-adjusted liquid includes the following raw materials in parts by weight: 2 parts of nano-titanium dioxide, 4 parts of hydrochloric acid dopamine solution, 1 part of barium nitrate aqueous solution, and 3 parts of carbon nanotubes.

[0034] In this embodiment, the mass fraction of the hydrochloric acid dopamine solution is 2%.

[0035] In this embodiment, the mass fraction of the barium nitrate aqueous solution is 3%.

[0036] Example 2. A ductile alloy composite roll in this embodiment includes a roll core and a roll body working layer. The roll body working layer includes the following raw materials in parts by weight: 5 parts of C, 40 parts of Fe, 3 parts of Si, 4 parts of Mn, 3 parts of V, 4 parts of Ni, 4 parts of Cr, and 5 parts of a quenching and tempering agent.

[0037] The preparation method of the quenching and tempering agent in this embodiment is as follows: S01: Irradiate cerium powder in a proton irradiation chamber for 1 h, with an irradiation power of 350 - 400 W. After the irradiation is completed, obtain the irradiated cerium agent; S02: First, prepare a lanthanum chloride solution with a mass fraction of 5% and a chitosan solution with a mass fraction of 4%; then add 5 parts of alumina and 4 parts of the lanthanum chloride solution to 8 parts of the chitosan solution, and then add 3 parts of nano-TaC and mix well to obtain a complex-modified liquid; S03: Stir the irradiated cerium agent and the complex quality modification liquid according to a weight ratio of 2:5. After stirring, perform suction filtration and drying to obtain a conditioning agent.

[0038] In this embodiment, the stirring speed of the stirring treatment is 450 r / min, stirring for 20 min, and the stirring temperature is 55 °C.

[0039] The preparation process of a ductile alloy composite roll in this embodiment includes the following steps: Mix C, Fe, Si, Mn, V, Ni, Cr and the conditioning agent and add them to a melting furnace for complete melting. After melting, cool and shape, and then ball mill through 100 meshes to obtain ball mill powder; Spray the ball mill powder onto the surface of the roll core by plasma spraying technology to obtain a roll body; the spraying voltage is 100 V, and the thickness of the sprayed coating is 5 mm; finally, perform heat improvement and adjustment treatment on the roll body to obtain the ductile alloy composite roll of the present invention.

[0040] The specific operation steps of the heat improvement and adjustment treatment in this embodiment are as follows: S101: Heat-treat the roll body at 230 °C for 1 h, then heat up to 1050 °C at a rate of 5 °C / min, hold for 20 min, and then cool to 60 °C at a rate of 3 °C / min for heat preservation treatment; S102: Immerse the heat-preserved roll body in a sufficient amount of ultrasonic liquid for ultrasonic modification treatment. After ultrasonic treatment, dry it, and then perform heat rewarming treatment on the dried product of S102; The specific operation steps of the heat rewarming treatment are as follows: First, heat up to 570 °C at a rate of 7 °C / min, hold for 20 min, finally cool down to 350 °C at a rate of 4 °C / min, continue to hold for 1 h, and finally air-cool to room temperature.

[0041] In this embodiment, the ultrasonic power of the ultrasonic modification treatment is 500 W, and the ultrasonic treatment is for 20 min.

[0042] The preparation method of the ultrasonic liquid in this embodiment is as follows: Preheat niobium nitride at a temperature of 55 °C for 1 h, and then add 5 parts of the preheated niobium nitride to 8 parts of the pre-adjusted liquid and stir well to obtain the ultrasonic liquid; The pre-adjusted liquid includes the following raw materials in parts by weight: 3 parts of nano-titanium dioxide, 6 parts of dopamine hydrochloride solution, 2 parts of barium nitrate aqueous solution, and 4 parts of carbon nanotubes.

[0043] In this embodiment, the mass fraction of the dopamine hydrochloride solution is 5%.

[0044] In this embodiment, the mass fraction of the barium nitrate aqueous solution is 4%.

[0045] Example 3. A ductile alloy composite roll of this embodiment includes a roll core and a roll body working layer. The roll body working layer comprises raw materials in the following weight parts: 4 parts of C, 37.5 parts of Fe, 2 parts of Si, 3 parts of Mn, 2 parts of V, 3 parts of Ni, 3 parts of Cr and 4 parts of quenching and tempering agent.

[0046] The preparation method of the quenching and tempering agent in this embodiment is as follows: S01: Irradiate cerium powder in a proton irradiation chamber for 1 h with an irradiation power of 375 W. After irradiation ends, obtain the irradiated cerium agent; S02: First, prepare a lanthanum chloride solution with a mass fraction of 3.5% and a chitosan solution with a mass fraction of 3.5%; then add 4 parts of alumina and 3 parts of the lanthanum chloride solution to 6.5 parts of the chitosan solution, and then add 2.5 parts of nano TaC and mix well to obtain a composite modified liquid; S03: Stir the irradiated cerium agent and the composite modified liquid according to a weight ratio of 2:5. After stirring ends, carry out suction filtration and drying to obtain the quenching and tempering agent.

[0047] The stirring speed of the stirring treatment in this embodiment is 400 r / min, stirring for 20 min, and the stirring temperature is 52.5 °C.

[0048] The preparation process of a ductile alloy composite roll of this embodiment includes the following steps: Mix C, Fe, Si, Mn, V, Ni, Cr and the quenching and tempering agent and add them to a melting furnace for complete melting. After melting ends, cool and shape, and then ball mill through 100 meshes to obtain ball mill powder; Spray the ball mill powder onto the surface of the roll core by plasma spraying technology to obtain a roll body; the spraying voltage is 100 V, and the thickness of the sprayed coating is 4 mm; finally, carry out heat improvement and adjustment treatment on the roll body to obtain the ductile alloy composite roll of the present invention.

[0049] The specific operation steps of the heat improvement and adjustment treatment in this embodiment are as follows: S101: Heat-treat the roll body at 220 °C for 1 h, then heat it up to 1050 °C at a rate of 3.5 °C / min, hold for 20 min, and then cool it to 60 °C at a rate of 2 °C / min for heat preservation treatment; S102: Immerse the heat-preserved roll body in a sufficient amount of ultrasonic liquid for ultrasonic modification treatment. After ultrasonic treatment ends, dry it, and then carry out heat rewarming treatment on the dried product of S102; The specific operation steps of the heat rewarming treatment are as follows: First, heat it up to 560 °C at a rate of 6 °C / min, hold for 20 min, finally cool it to 350 °C at a rate of 4 °C / min, continue to hold for 1 h, and finally air-cool to room temperature.

[0050] The ultrasonic power for the ultrasonic modification treatment in this embodiment is 450 W, and the ultrasonic treatment lasts for 20 min.

[0051] The preparation method of the ultrasonic liquid in this embodiment is as follows: First, preheat niobium nitride at a temperature of 52.5 °C for 1 h, and then add 4 parts of the preheated niobium nitride to 6.5 parts of the pre-adjusted liquid and stir well to obtain the ultrasonic liquid; The pre-adjusted liquid includes the following raw materials in parts by weight: 2.5 parts of nano-titanium dioxide, 5 parts of dopamine hydrochloride solution, 1.5 parts of barium nitrate aqueous solution, and 3.5 parts of carbon nanotubes.

[0052] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3.5%.

[0053] The mass fraction of the barium nitrate aqueous solution in this embodiment is 3.5%.

[0054] Comparative Example 1. The difference from Example 3 is that no tempering agent is added.

[0055] Comparative Example 2. The difference from Example 3 is that irradiated cerium agent is not added to the tempering agent.

[0056] Comparative Example 3. The difference from Example 3 is that the complex modification liquid is not added to the tempering agent.

[0057] Comparative Example 4. The difference from Example 3 is that alumina and lanthanum chloride solution are not added to the complex modification liquid.

[0058] Comparative Example 5. The difference from Example 3 is that chitosan solution and nano-TaC are not added to the complex modification liquid.

[0059] Comparative Example 6. The difference from Example 3 is that ultrasonic liquid ultrasonic modification treatment is not adopted in the thermal improvement adjustment treatment.

[0060] Comparative Example 7. The difference from Example 3 is that thermal rewarming treatment is not adopted in the thermal improvement adjustment treatment.

[0061] Comparative Example 8. The difference from Example 3 is that preheated niobium nitride is not added to the ultrasonic liquid.

[0062] Comparative Example 9. The difference from Example 3 is that nano-titanium dioxide is not added to the ultrasonic liquid.

[0063] Comparative Example 10. The difference from Example 3 is that carbon nanotubes are not added to the ultrasonic liquid.

[0064] Comparative Example 11 The difference from Example 3 is that barium nitrate aqueous solution is not added to the ultrasonic liquid, and water is used instead of the dopamine hydrochloride solution.

[0065] The products of Examples 1 - 3 and Comparative Examples 1 - 11 were subjected to performance tests, including abrasion resistance, tensile properties, and impact properties. The test results are as follows;

[0066] It can be seen from Comparative Examples 1 - 11 and Examples 1 - 3 that; The product of Example 3 has excellent tensile strength, and at the same time, the product has excellent impact toughness and wear resistance. The three can be coordinately improved, and the product performances of Comparative Examples 1 - 11 are all inferior to those of the product of Example 3.

[0067] Based on the above tests, the product was placed under the condition of 5% hydrochloric acid mist for 12 h, then heated from room temperature to 200 °C at a rate of 2 - 5 °C / min, and finally immersed in water at 2 °C for 12 h to test the temperature change resistance and corrosion resistance stability of the product. The test results are as follows:

[0068] It can be seen from Comparative Examples 1 - 11 and Example 3 that the product of Example 3 has excellent performance stability under temperature change resistance and corrosion resistance conditions; It can be seen from Comparative Examples 1 - 5 and Example 3 that when the tempering agent is not added to the product, the product performance deteriorates significantly. At the same time, when the irradiated cerium agent is not added to the tempering agent, the compound modification liquid is not added to the tempering agent, alumina, lanthanum chloride solution is not added to the compound modification liquid, chitosan solution and nano - TaC are not added to the compound modification liquid, the product performances all show a deteriorating trend to varying degrees. The tempering agent made of the compound modification liquid obtained by the specific method of the present invention and the irradiated cerium agent has the most significant product performance effect, and the effects of using other methods instead are not as obvious as that of the present invention; It can be seen from Comparative Examples 6 - 7 and Example 3 that when ultrasonic liquid ultrasonic modification treatment is not used in the thermal improvement adjustment treatment and thermal re - warming treatment is not used in the thermal improvement adjustment treatment, the product performances all show a deteriorating trend; It can be seen from Comparative Examples 8 - 11 and Example 3 that when pre - heated niobium nitride, nano - titanium dioxide, carbon nanotubes, and barium nitrate aqueous solution are not added to the ultrasonic liquid, and water is used instead of the dopamine hydrochloride solution, the product performances all show a deteriorating trend to varying degrees. Only by using the ultrasonic liquid obtained by the specific method of the present invention in combination with thermal re - warming treatment, and the thermal improvement adjustment treatment obtained by a specific process, the product performance effect is the most significant, and the effects of using other methods instead are not as obvious as that of the present invention.

[0069] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

[0070] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ductile alloy composite roll, characterized in that, It includes a roll core and a working layer of the roll body. The working layer of the roll body includes the following raw materials in parts by weight: 3 - 5 parts of C, 35 - 40 parts of Fe, 1 - 3 parts of Si, 2 - 4 parts of Mn, 1 - 3 parts of V, 2 - 4 parts of Ni, 2 - 4 parts of Cr, and 3 - 5 parts of a quenching and tempering agent.

2. The ductile alloy composite roll according to claim 1, characterized in that, The ductile iron alloy composite roll includes the following raw materials in parts by weight: 4 parts of C, 37.5 parts of Fe, 2 parts of Si, 3 parts of Mn, 2 parts of V, 3 parts of Ni, 3 parts of Cr, and 4 parts of a quenching and tempering agent.

3. The ductile alloy composite roll according to claim 1, wherein The preparation method of the quenching and tempering agent is as follows: S01: Irradiate cerium powder in a proton irradiation chamber for 1 h with an irradiation power of 350 - 400 W. After irradiation, the irradiated cerium agent is obtained. S02: First, prepare a lanthanum chloride solution with a mass fraction of 2 - 5% and a chitosan solution with a mass fraction of 3 - 4%. Then, add 3 - 5 parts of alumina and 2 - 4 parts of the lanthanum chloride solution to 5 - 8 parts of the chitosan solution, and then add 2 - 3 parts of nano - TaC and mix well to obtain a composite modified liquid. S03: Stir - process the irradiated cerium agent and the composite modified liquid according to a weight ratio of 2:

5. After stirring, filter by suction and dry to obtain the quenching and tempering agent.

4. A ductile alloy composite roll according to claim 3, characterized in that, The stirring speed of the stirring process is 350 - 450 r / min, stir for 20 min, and the stirring temperature is 50 - 55 °C.

5. The preparation process of the ductile alloy composite roll according to any one of claims 1-4, characterized in that, It includes the following steps: Mix C, Fe, Si, Mn, V, Ni, Cr, and the quenching and tempering agent and add them to a melting furnace for complete melting. After melting, cool and shape, and then ball - mill through 100 - mesh to obtain ball - milled powder. Spray the ball - milled powder onto the surface of the roll core by plasma spraying technology to obtain a roll body. The spraying voltage is 100 V, and the thickness of the sprayed layer is 3 - 5 mm. Finally, perform heat improvement and adjustment treatment on the roll body to obtain the ductile iron alloy composite roll of the present invention.

6. The preparation process of a ductile alloy composite roll according to claim 5, characterized in that, The specific operation steps of the heat improvement and adjustment treatment are as follows: S101: Heat - treat the roll body at 210 - 230 °C for 1 h, then heat it at a rate of 2 - 5 °C / min to 1050 °C, hold for 20 min, and then cool it at a rate of 1 - 3 °C / min to 60 °C for heat preservation treatment. S102: Immerse the heat - preserved roll body into a sufficient amount of ultrasonic liquid for ultrasonic modification treatment. After ultrasonic treatment, dry it, and then perform re - heat - warming treatment on the dried product of S102. The specific operation steps of the re - heat - warming treatment are as follows: First, heat it at a rate of 5 - 7 °C / min to 550 - 570 °C, hold for 20 min, and finally cool it at a rate of 4 °C / min to 350 °C, continue to hold for 1 h, and finally air - cool to room temperature.

7. The preparation process of a ductile alloy composite roll according to claim 6, characterized in that, The ultrasonic power of the ultrasonic modification treatment is 400 - 500 W, and ultrasonic treatment is carried out for 20 min.

8. The preparation process of a ductile alloy composite roll according to claim 6, characterized in that, The preparation method of the ultrasonic liquid is as follows: Pre - heat niobium nitride at a temperature of 50 - 55 °C for 1 h, and then add 3 - 5 parts of the pre - heated niobium nitride to 5 - 8 parts of a pre - adjusted liquid and stir well to obtain the ultrasonic liquid. The pre - adjusted liquid includes the following raw materials in parts by weight: 2 - 3 parts of nano - titanium dioxide, 4 - 6 parts of dopamine hydrochloride solution, 1 - 2 parts of barium nitrate aqueous solution, and 3 - 4 parts of carbon nanotubes.

9. The preparation process of a ductile alloy composite roll according to claim 8, characterized in that, The mass fraction of the dopamine hydrochloride solution is 2 - 5%.

10. The preparation process of a ductile alloy composite roll according to claim 8, characterized in that, The mass fraction of the barium nitrate aqueous solution is 3 - 4%.

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