Device and method for preparing gradient heterogeneous structure nickel-based alloy

Abstract

The invention relates to a device and a method for preparing a gradient heterogeneous structure nickel-based alloy, and belongs to the related technical field of metal material preparation, the device sequentially comprises an uncoiling device, a first guide roller, a pinch roller, a cooling box, a pinch roller, a laser heating device, a roller group, a second guide roller and a coiling device along the direction of a production process; the cooling box sequentially comprises a cleaning section, a deep cooling section and an air cooling section in the production process direction. The laser heating device comprises laser sources which are symmetrically arranged up and down, the nickel-based alloy plate strip with the gradient structure can be efficiently produced through the continuous rolling and cooling process, the requirement for batch application of high-performance materials in the modern industry is met, and through the synergistic effect of copious cooling, laser heating and rolling, the high-performance nickel-based alloy plate strip with the gradient structure can be obtained. The nickel-based alloy forms a continuous hardness / grain size gradient along the thickness direction; and high strength and anti-fatigue performance are both considered.

Description

Technical Field

[0001] The present invention belongs to the technical field related to metal material preparation, and relates to a device and method for preparing a gradient heterogeneous structure nickel-based alloy. Background Art

[0002] High-temperature nickel-based alloys, due to their exceptional high-temperature mechanical properties, excellent oxidation resistance, and outstanding thermal fatigue resistance, hold an irreplaceable position in the manufacturing of high-end equipment such as aerospace, energy, and power generation. They are particularly important as core materials for hot-end components such as turbine blades and combustion chambers in aircraft engines. With the continuous improvement of aircraft engine thrust-to-weight ratios and thermal efficiency, the service temperature and mechanical properties of high-temperature nickel-based alloys have become increasingly stringent. In recent years, gradient heterogeneous microstructured metal materials have attracted widespread attention from both academic and engineering communities due to their unique performance advantages that transcend the traditional inverse strength-ductility relationship. Research has shown that these materials exhibit multi-layered synergistic strengthening mechanisms during deformation: 1) The strain incompatibility effect caused by the mechanical property differences between gradient layers can induce additional strain strengthening; 2) The presence of dispersed strain concentration zones in fine-grained layers promotes nonlocalized strain distribution, significantly improving the material's uniform elongation; and 3) Coarse-grained layers form a synergistic deformation system with other gradient layers through twinning deformation.

[0003] Therefore, developing high-temperature nickel-based alloys with gradient microstructures has become a key technological path to breaking through material performance bottlenecks. Through the precise design and regulation of multi-scale gradient microstructures, optimized material performance can be achieved across different temperature zones, significantly improving the overall service performance, reliability, and service life of key components in extreme environments.

[0004] After searching, the invention patent with application number CN202411752969.4 discloses a gradient isomerization structure and its preparation method and alloy for improving the high-temperature oxidation resistance of alloys. The invention uses methods such as laser strengthening, shot peening, surface mechanical grinding or surface mechanical rolling to process materials to form a gradient structure, but this method may seriously damage the surface of the material, and the depth of the gradient layer is limited, which cannot meet industrial needs. The invention patent with application number CN202310778327.0 discloses a method and device for preparing a gradient structure sample of a high-temperature alloy. The invention uses electric current to heat the sample and uses the heat conduction characteristics between the sample and the electrode to create a temperature gradient distribution on the sample, causing the grains in the over-dissolved area to grow to form coarse grains, and the grain size in the sub-solid solution area remains unchanged and fine grains, thereby forming a gradient structure. However, this method has a long heating time, resulting in a long production cycle, and cannot be mass-produced industrially. Therefore, the development of new technologies for the preparation of gradient materials that are efficient, precise, and scalable has become an urgent need to promote the development of this field. Summary of the Invention

[0005] In view of this, the present invention provides a preparation device and method for a gradient heterogeneous nickel-based alloy in order to solve the problem that the existing high-temperature nickel-based alloy preparation device is difficult to efficiently and accurately prepare alloy materials with ideal gradient structures and is unable to mass-produce nickel-based alloy materials with gradient structures.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A preparation device for a gradient heterogeneous structure nickel-based alloy comprises, in sequence along the production process direction, an unwinding device, a guide roller 1, a pinch roller, a cooling box, a pinch roller, a laser heating device, a roll group, a guide roller 1, and a winding device; the cooling box comprises, in sequence along the production process direction, a cleaning section, a deep cooling section, and an air cooling section; the laser heating device comprises a laser source symmetrically arranged up and down.

[0008] Furthermore, the unwinding device and the winding device both include a planetary reducer and a servo motor. The unwinding mechanism of the unwinding device and the winding mechanism of the winding device are connected to the unwinding and winding mechanism base arranged below the planetary reducer and the servo motor. The unwinding mechanism and the winding mechanism are connected to the power output end of the planetary reducer through a universal joint, and the power input end of the planetary reducer and the power output end of the servo motor are connected through a coupling.

[0009] Furthermore, the cleaning section includes two brush rollers and two spray heads, with the two spray heads positioned at the entrance and exit of the cleaning section, respectively, and the two brush rollers positioned diagonally below the spray heads. The brush rollers and spray heads effectively remove oil and fine particles from the strip surface, ensuring surface cleanliness and improving the effectiveness of subsequent cryogenic and laser heating processes.

[0010] Furthermore, the cryogenic section includes two sinking rollers and a cooling medium, wherein the two sinking rollers are respectively located at the inlet and outlet of the cryogenic section and are both immersed in the cooling medium.

[0011] Furthermore, the air cooling section includes a guide roller 2 and two air cooling boxes, wherein the guide roller 2 is arranged at the entrance of the air cooling section, and the air cooling box is arranged at the exit of the air cooling section, and is symmetrically distributed up and down.

[0012] Furthermore, the laser heating device also includes an infrared thermometer close to the side of the roller group. The infrared thermometer is connected to a PLC program for real-time regulation of the laser source heating temperature, ensuring real-time monitoring and precise control of the temperature.

[0013] Furthermore, the roll group includes working rolls for clamping the strip and support rolls used in conjunction with the working rolls.

[0014] Furthermore, the brush roller is made of soft real velvet, which ensures that oil stains and fine particles on the surface of the strip are removed while avoiding defects such as scratches on the surface of the strip.

[0015] Furthermore, the sinking roller is made of rubber.

[0016] Furthermore, a method for preparing a gradient heterogeneous structure nickel-based alloy comprises the following steps:

[0017] S1. A nickel-based alloy strip having a width of 100-600 mm and a thickness of 1-2 mm is mounted on the uncoiler on the left side of the six-high rolling mill as the uncoiled end for rolling. The nickel-based alloy strip passes through the upper surface of the first guide roller on the left side, the pinch roller on the left side, the lower surface of the brush roller at the entrance of the cleaning section, the upper surface of the brush roller at the exit of the cleaning section, the lower surface of the sinking roller, the upper surface of the second guide roller at the entrance of the air cooling section, the air cooling box, the pinch roller, the laser heating device, the rolling roller group, the upper surface of the first guide roller on the right side, and is then wound onto the winding device on the right side.

[0018] S2. The cleaning section in the cooling box removes oil and fine particles from the strip surface to improve cold rolling efficiency. The incident angle between the spray head and the strip surface is 15-30 degrees, the distance from the brush roller is 20-50 mm, and the spray pressure is 5-9 MPa. The spray medium is an alkaline solution with a pH value of 10-14.

[0019] S3, through the deep cooling section in the cooling box to make the surface and core temperatures of the strip close to and at a lower temperature, wherein the cooling medium is ice-water mixture or liquid nitrogen;

[0020] S4. Remove water stains on the surface of the strip through the air cooling section in the cooling box, wherein the air temperature of the air cooling box is -15°~-35°, the wind speed is 5-8 m / min, and the wind pressure is 80-100 MPa;

[0021] S5. The surface of the material is heated by a laser heating device to form a temperature gradient from the core to the surface of the strip. The laser is a fiber laser with a wavelength of 1060-1080 nm, a rectangular spot shape, and a heating power of 50 kW to 200 kW. Argon gas is introduced during the heating process to prevent oxidation of the strip surface.

[0022] S6. The nickel-based alloy strip is continuously cold-rolled through 4 to 6 passes, wherein the rolling speed of each pass is 5-15 m / min, the rolling pressure is 20-130 t, the rolling tension is 120 kg to 580 kg, and the single-pass reduction rate is 4% to 9%;

[0023] S7. Place the nickel-based alloy strip in a uniform heating furnace and anneal for 3 to 5 minutes at an annealing temperature of 1070 to 1150°C.

[0024] The beneficial effects of the present invention are:

[0025] 1. The present invention discloses a device and method for preparing a gradient heterogeneous structure nickel-based alloy. Through continuous rolling and cooling processes, it is possible to efficiently produce nickel-based alloy plates and strips with a gradient structure, meeting the modern industry's demand for mass application of high-performance materials. Compared with traditional high-temperature nickel-based alloy preparation methods, this method significantly shortens the product manufacturing cycle. Traditional heating and cooling methods often require a long time to achieve the required temperature gradient, while the present invention rapidly realizes temperature control of the material through the synergistic effect of laser heating and cryogenic treatment, thereby greatly improving production efficiency.

[0026] 2. The present invention discloses a device and method for preparing a gradient heterogeneous structure nickel-based alloy. Through the synergistic effect of "deep cooling + laser heating + rolling", the gradient structure control of the nickel-based alloy is realized on a single production line. The temperature gradient of laser heating and the rolling strain gradient work together to form a continuous hardness / grain size gradient along the thickness direction of the material, thereby taking into account both high strength and fatigue resistance.

[0027] 3. The present invention discloses a device and method for preparing a gradient heterogeneous structure nickel-based alloy. The cleaning section in the cooling box can effectively remove oil stains and tiny particles on the surface of the strip, thereby ensuring the cleanliness of the strip surface and improving the subsequent deep cooling and laser heating treatment effects. At the same time, the brush roller is made of real velvet, which ensures that oil stains and tiny particles on the strip surface are removed while avoiding defects such as scratches on the strip surface.

[0028] 4. The present invention discloses a device and method for preparing a gradient heterogeneous structure nickel-based alloy. Through the deep cooling section in the cooling box, the internal and surface temperatures of the strip are made close to and kept at a lower temperature, while inducing high-density dislocations and nano-twins to improve the initial hardness of the material.

[0029] 5. The present invention discloses a device and method for preparing a gradient heterogeneous structure nickel-based alloy. The laser heating device adopts a fixedly installed high-power fiber laser source that is symmetrical in the upper and lower parts, and cooperates with a scanning galvanometer to achieve local rapid heating, so that a temperature gradient field is formed inside and on the surface of the strip. An infrared thermometer is provided on the outlet side of the laser heating device to form a closed-loop temperature control system.

[0030] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0032] Figure 1 This is a schematic structural diagram of a device for preparing a gradient isomerized nickel-based alloy according to the present invention;

[0033] Figure 2 This is a schematic structural diagram of an unwinding device and a winding device in a device for preparing a gradient isomerized nickel-based alloy according to the present invention;

[0034] Figure 3 This is the IPF diagram of the nickel-based alloy strip with gradient heterogeneous structure in the thickness direction of the present invention.

[0035] Figure 1: Unwinding mechanism 100, unwinding and winding mechanism base 101, universal joint 102, planetary reducer 103, servo motor 104, coupling 105, cooling box 110, cleaning section 200, brush roller 201, spray head 202, deep cooling section 300, sinking roller 301, cooling medium 302, air cooling section 400, guide roller 2 401, air cooling box 402, laser heating device 500, laser source 501, infrared thermometer 502, guide roller 1 600, pinch roller 700, roller group 800, winding mechanism 900. DETAILED DESCRIPTION

[0036] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0037] like Figure 1-Figure 2 The device for preparing a gradient heterogeneous structure nickel-based alloy shown in the figure includes, from left to right along the production process direction, an unwinding device, a guide roller 600, a pinch roller 700, a cooling box 110, a pinch roller 700, a laser heating device 500, a rolling roller group 800, a guide roller 600, and a winding device; the cooling box 110 includes, from left to right along the production process direction, a cleaning section 200, a deep cooling section 300, and an air cooling section 400; the rolling roller group 800 includes working rollers for clamping the strip and support rollers used in conjunction with the working rollers.

[0038] Both the unwinding device and the winding device include a planetary reducer 103 and a servo motor 104. The unwinding mechanism 100 of the unwinding device and the winding mechanism 900 of the winding device are connected to the unwinding and winding mechanism base 101 arranged below the planetary reducer 103 and the servo motor 104. The unwinding device and the winding device are connected to the power output end of the planetary reducer 103 through a universal joint 102, and the power input end of the planetary reducer 103 and the power output end of the servo motor 104 are connected through a coupling 105.

[0039] The cleaning section 200 includes two brush rollers 201 and two spray heads 202. The two spray heads 202 are located at the entrance and exit of the cleaning section 200, respectively, and the two brush rollers 201 are positioned diagonally below the spray heads 202. The brush rollers 201 and spray heads 202 effectively remove oil stains and fine particles from the strip surface, ensuring surface cleanliness and improving the effectiveness of subsequent cryogenic and laser heating treatments. The brush rollers 201 are made of soft, velvet, ensuring that oil stains and fine particles are removed while also preventing surface defects such as scratches.

[0040] The cryogenic section 300 includes two sinking rollers 301 and a cooling medium 302 , wherein the two sinking rollers 301 are respectively located at the inlet and outlet of the cryogenic section 300 and are both immersed in the cooling medium 302 . The sinking rollers 301 are made of rubber.

[0041] The air cooling section 400 includes a second guide roller 401 and two air cooling boxes 402 , wherein the second guide roller 401 is arranged at the entrance of the air cooling section 400 , and the air cooling boxes 402 are arranged at the exit of the air cooling section 400 , and are symmetrically distributed up and down.

[0042] The laser heating device 500 includes a laser source 501 symmetrically arranged above and below and an infrared thermometer 502 close to the side of the roller group 800. The infrared thermometer 502 is connected to a PLC program. The infrared thermometer 502 can monitor the surface temperature of the strip in real time and feed back the temperature signal to the PLC system in real time. The internal program of the PLC then compares it with the set temperature to adjust the heating temperature of the laser source 501, realizing closed-loop control and ensuring real-time monitoring and precise control of the temperature.

[0043] Furthermore, a method for preparing a gradient heterogeneous structure nickel-based alloy comprises the following steps:

[0044] S1. A nickel-based alloy strip having a width of 100-600 mm and a thickness of 1-2 mm is placed on the uncoiler on the left side of the six-high rolling mill as the uncoiler end for rolling. The nickel-based alloy strip passes through the upper surface of the left guide roller 1 600, the left pinch roller 700, the lower surface of the brush roller 201 at the entrance of the cleaning section 200, the upper surface of the brush roller 201 at the exit of the cleaning section 200, the lower surface of the sinking roller 301, the upper surface of the guide roller 2 401 at the entrance of the air-cooling section 400, the air-cooling box 402, the pinch roller 700, the laser heating device 500, the roller group 800, the upper surface of the right guide roller 1 600, and finally is wound onto the right winding device.

[0045] S2. The cleaning section 200 in the cooling box 110 is used to remove oil stains and small particles on the strip surface to improve the cold rolling efficiency. The incident angle of the spray head 202 to the strip surface is 15-30 degrees, the distance from the brush roller 201 is 20-50 mm, and the spray pressure is 5-9 MPa. The spray medium is an alkaline solution with a pH value of 10-14.

[0046] S3, using the cryogenic section 300 in the cooling box 110 to make the surface and core temperatures of the strip close to and at a lower temperature, wherein the cooling medium 302 is an ice-water mixture or liquid nitrogen;

[0047] S4. Remove water stains on the surface of the strip through the air cooling section 400 in the cooling box 110, wherein the air temperature of the air cooling box 402 is -15° to -35°, the wind speed is 5-8 m / min, and the wind pressure is 80-100 MPa;

[0048] S5. The surface of the material is heated by a laser heating device 500 to form a temperature gradient from the core to the surface of the strip. The laser is a fiber laser with a wavelength of 1060-1080 nm, a rectangular spot shape, and a heating power of 50 kW to 200 kW. Argon gas is introduced during the heating process to prevent oxidation of the strip surface.

[0049] S6. The nickel-based alloy strip is continuously cold-rolled through 4 to 6 passes, wherein the rolling speed of each pass is 5-15 m / min, the rolling pressure is 20-130 t, the rolling tension is 120 kg to 580 kg, and the single-pass reduction rate is 4% to 9%;

[0050] S7. Place the nickel-based alloy strip in a uniform heating furnace and anneal for 3 to 5 minutes at an annealing temperature of 1070 to 1150°C.

[0051] Example

[0052] Make as Figure 3 The preparation method of the nickel-based alloy strip with gradient heterogeneous structure shown includes the following steps:

[0053] A 2mm x 400mm nickel-based alloy coil is placed on the unwinding device on the left side of the six-high rolling mill for rolling. After two rolling passes, it is cold-rolled to 0.863mm. The rolling process is as follows:

[0054] The first rolling process:

[0055] For the first pass, the thickness before rolling was 2.000mm, the thickness after rolling was 1.817mm, the rolling force was 70t, the front tension was 140Kg, the rear tension was 160Kg, the reduction rate was 9%, and the rolling speed was 15m / min.

[0056] In the second pass, the thickness before rolling was 1.817mm, the thickness after rolling was 1.671mm, the rolling force was 70t, the front tension was 135Kg, the rear tension was 154Kg, the reduction rate was 8%, and the rolling speed was 15m / min.

[0057] For the third pass, the thickness before rolling was 1.817 mm, the thickness after rolling was 1.671 mm, the rolling force was 70 t, the front tension was 135 kg, the rear tension was 154 kg, the reduction rate was 8%, and the rolling speed was 13 m / min.

[0058] For the fourth pass, the thickness before rolling was 1.671 mm, the thickness after rolling was 1.55 mm, the rolling force was 75 t, the front tension was 132 kg, the rear tension was 150 kg, the reduction rate was 7%, and the rolling speed was 13 m / min.

[0059] For the fifth pass, the thickness before rolling was 1.55 mm, the thickness after rolling was 1.441 mm, the rolling force was 75 t, the front tension was 127 kg, the rear tension was 143 kg, the reduction rate was 7%, and the rolling speed was 10 m / min.

[0060] For the sixth pass, the thickness before rolling was 1.441 mm, the thickness after rolling was 1.368 mm, the rolling force was 82 t, the front tension was 133 kg, the rear tension was 135 kg, the reduction rate was 5%, and the rolling speed was 9 m / min.

[0061] The nickel-based alloy strip was annealed in a horizontal bright annealing furnace at a temperature of 1100°C and a TV value of 2.4.

[0062] The spray pressure of the spray head 202, the angle of incidence between the spray head 202 and the strip, the distance between the spray head 202 and the roller, the pH value of the spray medium, the temperature of the cooling medium 302 in the deep cooling section 300, the wavelength and heating power of the fiber laser, and the wind speed, wind pressure, and temperature of the air cooling box 402 are set according to the rolling reduction rate and rolling speed of each pass. The parameters in these six cold rolling passes are as follows:

[0063] Table 1: Parameters of six-pass cold rolling in the first rolling process

[0064]

[0065] Second rolling process:

[0066] In the first pass, the thickness before rolling was 1.368mm, the thickness after rolling was 1.244mm, the rolling force was 75t, the front tension was 127Kg, the rear tension was 132Kg, the reduction rate was 9%, and the rolling speed was 9m / min.

[0067] In the second pass, the thickness before rolling was 1.244mm, the thickness after rolling was 1.144mm, the rolling force was 75t, the front tension was 120Kg, the rear tension was 128Kg, the reduction rate was 8%, and the rolling speed was 9m / min.

[0068] For the third pass, the thickness before rolling was 1.144 mm, the thickness after rolling was 1.052 mm, the rolling force was 75 t, the front tension was 115 kg, the rear tension was 120 kg, the reduction rate was 8%, and the rolling speed was 9 m / min.

[0069] For the fourth pass, the thickness before rolling was 1.052mm, the thickness after rolling was 0.978mm, the rolling force was 80t, the front tension was 112Kg, the rear tension was 117Kg, the reduction rate was 7%, and the rolling speed was 8m / min.

[0070] For the fifth pass, the thickness before rolling was 0.978 mm, the thickness after rolling was 0.909 mm, the rolling force was 83 t, the front tension was 110 kg, the rear tension was 115 kg, the reduction rate was 7%, and the rolling speed was 8 m / min.

[0071] For the sixth pass, the thickness before rolling was 0.909 mm, the thickness after rolling was 0.863 mm, the rolling force was 86 t, the front tension was 107 kg, the rear tension was 112 kg, the reduction rate was 5%, and the rolling speed was 7 m / min.

[0072] The nickel-based alloy strip is placed in a horizontal bright annealing furnace for annealing at an annealing temperature of 1100° C. and a TV value of 2.2.

[0073] The spray pressure of the spray head 202, the angle of incidence between the spray head 202 and the strip, the distance between the spray head 202 and the roller, the pH value of the spray medium, the temperature of the cooling medium 302 in the deep cooling section 300, the wavelength and heating power of the fiber laser, and the wind speed, wind pressure, and temperature of the air cooling box 402 are set according to the rolling reduction rate and rolling speed of each pass. The parameters in these six cold rolling passes are as follows:

[0074] Table 2: Parameters of the second six-pass cold rolling process

[0075]

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for preparing a gradient isomerized nickel-based alloy, characterized in that: The equipment includes an unwinding device, a guide roller 1, a pinch roller, a cooling box, a pinch roller, a laser heating device, a roller group, a guide roller 1, and a winding device in sequence along the production process direction; the cooling box includes a cleaning section, a deep cooling section, and an air cooling section in sequence along the production process direction; the laser heating device includes a laser source symmetrically arranged up and down.

2. The device for preparing a gradient isomerized nickel-based alloy according to claim 1, wherein: The unwinding device and the winding device both include a planetary reducer and a servo motor. The unwinding mechanism of the unwinding device and the winding mechanism of the winding device are connected to the unwinding and winding mechanism base arranged below the planetary reducer and the servo motor. The unwinding mechanism and the winding mechanism are connected to the power output end of the planetary reducer through a universal shaft, and the power input end of the planetary reducer is connected to the power output end of the servo motor through a coupling.

3. The device for preparing a gradient isomerized nickel-based alloy according to claim 1, wherein: The cleaning section comprises two brush rollers and two spray heads, wherein the two spray heads are respectively arranged at the inlet and outlet of the cleaning section, and the two brush rollers are respectively arranged obliquely below the spray heads.

4. The device for preparing a gradient isomerized nickel-based alloy according to claim 1, wherein: The cryogenic section includes two sinking rollers and a cooling medium, wherein the two sinking rollers are respectively located at the inlet and outlet of the cryogenic section and are both immersed in the cooling medium.

5. The device for preparing a gradient isomerized nickel-based alloy according to claim 1, wherein: The air cooling section includes a second guide roller and two air cooling boxes, wherein the second guide roller is arranged at the entrance of the air cooling section, and the air cooling boxes are arranged at the exit of the air cooling section and are symmetrically distributed up and down.

6. The device for preparing a gradient isomerized nickel-based alloy according to claim 1, wherein: The laser heating device also includes an infrared temperature detector close to one side of the roller group, and the infrared temperature detector is externally connected to a PLC program.

7. The device for preparing a gradient isomerized nickel-based alloy according to claim 1, wherein: The roll group includes working rolls for clamping the strip and support rolls used in conjunction with the working rolls.

8. The device for preparing a gradient isomerized nickel-based alloy according to claim 3, wherein: The brush roller is made of soft real velvet.

9. The device for preparing a gradient isomerized nickel-based alloy according to claim 4, wherein: The material of the sinking roller is rubber.

10. A method for preparing a gradient isomerized nickel-based alloy, characterized in that: The following steps are involved: S1. A nickel-based alloy strip having a width of 100-600 mm and a thickness of 1-2 mm is mounted on the uncoiler on the left side of the six-high rolling mill as the uncoiled end for rolling. The nickel-based alloy strip passes through the upper surface of the first guide roller on the left side, the pinch roller on the left side, the lower surface of the brush roller at the entrance of the cleaning section, the upper surface of the brush roller at the exit of the cleaning section, the lower surface of the sinking roller, the upper surface of the second guide roller at the entrance of the air cooling section, the air cooling box, the pinch roller, the laser heating device, the rolling roller group, the upper surface of the first guide roller on the right side, and is then wound onto the winding device on the right side. S2. Remove oil and fine particles from the strip surface through the cleaning section in the cooling box. The incident angle between the spray head and the strip surface is 15-30 degrees, the distance from the brush roller is 20-50 mm, and the spray pressure is 5-9 MPa. The spray medium is an alkaline solution with a pH value of 10-14. S3, through the deep cooling section in the cooling box to make the surface and core temperatures of the strip close to and at a lower temperature, wherein the cooling medium is ice-water mixture or liquid nitrogen; S4. Remove water stains on the surface of the strip through the air cooling section in the cooling box, wherein the air temperature of the air cooling box is -15°~35°C, the wind speed is 5-8 m / min, and the wind pressure is 80-100 MPa; S5. The surface of the material is heated by a laser heating device to form a temperature gradient from the core to the surface of the strip. The laser is a fiber laser with a wavelength of 1060-1080 nm, a rectangular spot shape, and a heating power of 50 kW to 200 kW. Argon gas is introduced during the heating process to prevent oxidation of the strip surface. S6. The nickel-based alloy strip is continuously cold-rolled through 4 to 6 passes, wherein the rolling speed of each pass is 5-15 m / min, the rolling pressure is 20-130 t, the rolling tension is 120 kg to 580 kg, and the single-pass reduction rate is 4% to 9%; S7. Place the nickel-based alloy strip in a uniform heating furnace and anneal for 3 to 5 minutes at an annealing temperature of 1070 to 1150°C.

Images