High-temperature-fatigue-resistant copper alloy crystallization wheel as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of copper alloy crystallization wheels, and particularly relates to a high-temperature-fatigue-resistant copper alloy crystallization wheel and a preparation method thereof.The preparation method comprises the steps that a CuCrZrIn material is selected for the high-temperature-fatigue-resistant copper alloy crystallization wheel, the material is melted, vacuum electromagnetic centrifugal casting is conducted, and an annular crystallization wheel casting blank is obtained; the annular crystallization wheel casting blank is subjected to high-temperature multidirectional forging; the annular crystallization wheel casting blank subjected to high-temperature multidirectional forging is subjected to primary machining, and an oxide layer, impurity components and the like on the surface are removed; and the machined annular crystallization wheel copper alloy casting blank is sequentially subjected to hot ring rolling, solid solution heat treatment, cryogenic ring rolling, aging heat treatment and machining, and the annular crystallization wheel copper alloy casting blank is obtained. The manufacturing method is short in process, reasonable and efficient, and has the advantages of being uniform in product component, high in yield, low in cost, good in high-temperature fatigue resistance, high in manufactured product performance, long in service life and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of copper alloy crystallization wheels, and in particular relates to a high temperature fatigue resistant copper alloy crystallization wheel and a preparation method and application thereof. Background Art

[0002] The copper alloy crystallization wheel is one of the core components of the continuous casting and rolling production line, and is one of the consumable parts with high cost, which also directly affects the product quality. During the production and use process, the inner side of the crystallization wheel groove is sprayed with carbon powder formed by acetylene, and the copper liquid or aluminum liquid is injected into the groove sprayed with carbon powder. The crystallization wheel is cooled by the inner cooling water system, and the crystallization wheel rotates at a constant speed, so that the copper liquid or aluminum liquid completes the casting process, forming an inverted trapezoidal casting rake, which enters the rolling mill through the traction machine for rolling deformation.

[0003] At present, the commonly used preparation method of copper alloy crystallization wheel is vacuum melting casting → hot forging → solution → hot rolling → cold rolling → aging → machining. This process has low yield rate, unstable performance, high preparation cost, etc., and defects such as local cracks appear during use, and the service life is short. It cannot fully meet the use requirements of continuous casting and rolling production lines, especially production lines with large annual design capacity. Therefore, it is necessary to study a copper alloy crystallization wheel with low manufacturing cost, high temperature resistance and long service life and its preparation method. Summary of the invention

[0004] In order to overcome the shortcomings of copper alloy crystallization wheels prepared by traditional processes, such as low yield rate, high cost and short service life, especially the shortcomings in high temperature fatigue service, the purpose of the present invention is to provide an efficient preparation method of high temperature fatigue resistant copper alloy crystallization wheels with short process, high yield rate and good high temperature fatigue service performance.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: A method for preparing a high temperature fatigue resistant copper alloy crystallization wheel comprises the following steps: (1) Ingredients Select CuCrZrIn material, and prepare the ingredients according to the element composition of Cr 0.6-1.0wt%, Zr 0.1-0.15wt%, In 0.05-0.1wt%, Si 0.05-0.1wt%, Ni 0.1-0.2wt%, O≤10ppm, and the balance is Cu, and equip various metal materials; (2) Vacuum electromagnetic centrifugal casting The prepared metal materials are melted and vacuum electromagnetic centrifugal casting is performed to obtain an annular crystal wheel casting blank; (3) First machining The annular crystal wheel casting blank obtained by vacuum electromagnetic centrifugal casting is mechanically processed to remove the oxide layer and impurity components on the surface; (4) High temperature multi-directional forging The annular crystal wheel casting obtained after machining is used as a blank material for high temperature multi-directional forging; (5) Hot ring rolling The annular crystal wheel casting blank obtained after high-temperature multi-directional forging is used as a hot ring rolling blank for hot ring rolling to obtain a crystal wheel ring blank; (6) Solution heat treatment The crystallized ring blank obtained after hot ring rolling is subjected to solution heat treatment at a temperature of 900-950°C; (7) Deep cold ring rolling The crystallized wheel ring blank obtained after the solution heat treatment is subjected to deep cold ring rolling; (8) Aging heat treatment The crystallized wheel ring blank after deep cold ring rolling is subjected to aging heat treatment, the aging heat treatment temperature is 430-480°C, and the aging heat treatment time is 2-6 hours; (9) Secondary machining The crystal wheel ring blank after aging heat treatment is processed into a finished high temperature fatigue resistant copper alloy crystal wheel according to product size requirements.

[0006] In a preferred example, in step (1), the element Cr is added in the form of a CuCr20 master alloy, and the element Zr is added in the form of a CuZr20 master alloy.

[0007] In a preferred example, in step (2), during vacuum electromagnetic centrifugal casting, the vacuum degree is 5-50 Pa, the electromagnetic stirring frequency is 10-60 Hz, and the current is 100-300 A; During centrifugal casting, the rotation speed of the metal mold is 100-200 rpm / min, the heating temperature of the centrifugal casting mold is 100-200°C, and the casting temperature is 1150-1250°C.

[0008] In a preferred example, in step (4), during high temperature multi-directional forging, the initial forging temperature is 900-950°C, the final forging temperature is 700-750°C, and the single-pass forging deformation is 40-60%; Multi-directional forging adopts axial-radial cycle, and the number of forging cycles is 3 to 4.

[0009] In a preferred example, in step (5), a main roller with a horse platform is used during hot ring rolling, the longitudinal section of the main roller is trapezoidal, the main roller boss is in contact with the outer ring surface of the annular crystallization wheel casting, and the size of the main roller boss can be adjusted each time the hot ring rolling is performed, and a crystallization wheel ring billet with a groove is obtained after the hot ring rolling; During hot ring rolling, the heating temperature of the annular crystallization wheel casting is 850-920°C, the hot ring rolling passes are 2-3 passes, and the deformation amount of a single pass is 30-35%.

[0010] In a preferred example, in step (7), the main rolling roll size of the last pass of hot ring rolling is used during deep cold ring rolling; the deep cold temperature is -200 to -100°C, the deep cold ring rolling pass is a single pass, and the deformation amount is 25 to 30%.

[0011] In a preferred example, in step (9), the service temperature of the high temperature fatigue resistant copper alloy crystallization wheel is 0-600°C, and the service life of the copper rod continuous casting and rolling production line with an annual output of ≥220,000 tons is a product throughput of ≥70,000 tons.

[0012] Based on a general inventive concept, another object of the present invention is to provide a high temperature fatigue resistant copper alloy crystallization wheel prepared by the above preparation method and its application in continuous casting and rolling production.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. The large-ring copper alloy ingot is prepared by vacuum electromagnetic centrifugal casting. The Cr and Zr burnout under vacuum conditions is extremely low, which ensures the stability and accuracy of the Cr and Zr components and greatly reduces the loss. The copper alloy liquid solidifies under the action of electromagnetic stirring centrifugal casting. The large-ring casting reduces the generation of segregation, has a uniform composition, and refines the grains. At the same time, the slag in the casting process floats to the surface of the metal liquid, which synergistically improves the quality of the ingot. 2. The high-temperature multi-directional forging hot deformation processing method is adopted. The annular copper alloy casting is forged by high-temperature axial and radial alternating large processing deformation. The plastic deformation passes through the axial and radial areas of the entire casting, thereby ensuring the processing performance of the ingot; 3. The deep cold ring rolling deformation processing method is adopted to solve the bottleneck of reduced softening strength of rolled parts during normal temperature ring rolling, improve the strength of the crystallization wheel, and lay a good foundation for extending the high temperature fatigue service life; 4. The method has a short process, is reasonable and efficient, and has the advantages of uniform product composition, high yield rate, low cost, good high temperature fatigue resistance, high performance of manufactured products, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A front view of a copper alloy crystallization wheel structure according to one or more embodiments of the present invention; Figure 2 A schematic diagram of a high temperature multi-directional forging process according to one or more embodiments of the present invention; Figure 3 A schematic diagram of deep cold ring rolling according to one or more embodiments of the present invention; In the above figure: the distance or size between parts is exaggerated to show the position of each part, and the schematic diagram is only used for illustration; Figure 1-Figure 3The meanings of the markings are as follows: 1-main rolling roller; 2-main rolling roller boss; 3-core roller; 4-crystallization wheel ring blank; 5-conical roller; 6-deep cooling device. DETAILED DESCRIPTION

[0015] In the description of the present invention, it is necessary to understand that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and the purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the indicated components must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0016] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in conjunction with specific embodiments, but the present invention is not limited to these embodiments. It should be noted that, under the premise of not conflicting, the embodiments described below or the technical features can be arbitrarily combined to form new embodiments. In the present invention, unless otherwise specified, all parts and percentages are mass units, and the equipment and raw materials used can be purchased from the market or are commonly used in the art. The methods in the following embodiments, if not otherwise specified, are conventional methods in the art.

[0017] As used herein, the terms "comprises," "including," "contains," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0018] When an amount, concentration, or other value or parameter is expressed as a range, a preferred range, or a range limited by a series of upper preferred values ​​and lower preferred values, this should be understood to specifically disclose all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted as including a range of "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described in this article, unless otherwise specified, this range is intended to include its end values ​​and all integers and fractions within this range.

[0019] A method for preparing a high temperature fatigue resistant copper alloy crystallization wheel comprises the following steps: (1) Ingredients Select CuCrZrIn material, and prepare the ingredients according to the element composition of Cr 0.6-1.0wt%, Zr 0.1-0.15wt%, In 0.05-0.1wt%, Si 0.05-0.1wt%, Ni 0.1-0.2wt%, O≤10ppm, and the balance is Cu, and equip various metal materials; In some embodiments, the element Cr is added in the form of a CuCr20 master alloy; In some embodiments, the element Zr is added in the form of a CuZr20 master alloy; (2) Vacuum electromagnetic centrifugal casting The prepared metal materials are melted and vacuum electromagnetic centrifugal casting is performed to obtain an annular crystal wheel casting blank; In some embodiments, the vacuum degree during vacuum electromagnetic centrifugal casting is 5 to 50 Pa; In some embodiments, the electromagnetic stirring frequency is 10 to 60 Hz, and the current is 100 to 300 A; In some embodiments, the rotation speed of the metal mold during centrifugal casting is 100 to 200 rpm / min; In some embodiments, the heating temperature of the centrifugal casting mold is 100-200°C; In some embodiments, the casting temperature is 1150-1250°C; (3) First machining The annular crystal wheel casting blank obtained by vacuum electromagnetic centrifugal casting is mechanically processed to remove the oxide layer and impurity components on the surface; (4) High temperature multi-directional forging The annular crystal wheel casting obtained after machining is used as a blank material for high temperature multi-directional forging; In some embodiments, the initial forging temperature during high temperature multi-directional forging is 900-950° C.; In some embodiments, the final forging temperature is 700-750°C; In some embodiments, the deformation amount of a single forging pass is 40-60%; In some embodiments, multi-directional forging uses an axial-radial cycle, and the number of forging cycles is 3 to 4; (5) Hot ring rolling The annular crystal wheel casting blank obtained after high-temperature multi-directional forging is used as a hot ring rolling blank for hot ring rolling to obtain a crystal wheel ring blank; In some embodiments, a main roller with a horse platform is used during hot ring rolling, the longitudinal section of the main roller is trapezoidal, the main roller boss contacts the outer ring surface of the annular crystallization wheel casting blank, the size of the main roller boss can be adjusted each time hot ring rolling is performed, and a crystallization wheel ring blank with a groove is obtained after hot ring rolling; In some embodiments, the heating temperature of the crystallization wheel annular casting billet during hot ring rolling is 850-920°C; In some embodiments, the hot ring rolling passes are 2 to 3 passes; In some embodiments, the deformation amount in a single pass is 30-35%; (6) Solution heat treatment The crystallized ring blank obtained after hot ring rolling is subjected to solution heat treatment at a temperature of 900-950°C; (7) Deep cold ring rolling The crystallized wheel ring blank obtained after the solution heat treatment is subjected to deep cold ring rolling; In some embodiments, the deep cold ring rolling uses the roller size of the last pass of hot ring rolling; In some embodiments, the cryogenic temperature is -200 to -100°C; In some embodiments, the cryogenic ring rolling pass is a single pass with a deformation of 25-30%; (8) Aging heat treatment The crystallized wheel ring blank after deep cold ring rolling is subjected to aging heat treatment, the aging heat treatment temperature is 430-480°C, and the aging heat treatment time is 2-6 hours; (9) Secondary machining The crystal wheel ring blank after aging heat treatment is processed into a finished high temperature fatigue resistant copper alloy crystal wheel according to product size requirements.

[0020] The specific embodiments of the present invention are described in detail below.

[0021] Example 1

[0022] A method for preparing a high temperature fatigue resistant copper alloy crystallization wheel comprises the following steps: (1) Ingredients Select CuCrZrIn material, and prepare the ingredients according to the element composition of Cr 0.6wt%, Zr 0.13wt%, In 0.05wt%, Si0.08wt%, Ni 0.15wt%, O≤10ppm, and the balance is Cu, and equip various metal materials; The element Cr is added as a CuCr20 master alloy, and the element Zr is added as a CuZr20 master alloy. (2) Vacuum electromagnetic centrifugal casting The prepared metal materials are melted and vacuum electromagnetic centrifugal casting is performed to obtain an annular crystal wheel casting blank; During vacuum electromagnetic centrifugal casting, the vacuum degree is 20Pa, the electromagnetic stirring frequency is 60HZ, and the current is 200A; During centrifugal casting, the speed of the metal mold is 100 rpm / min, the heating temperature of the centrifugal casting mold is 200°C, and the casting temperature is 1200°C; (3) First machining The annular crystal wheel casting blank obtained by vacuum electromagnetic centrifugal casting is mechanically processed to remove the oxide layer and impurity components on the surface; (4) High temperature multi-directional forging like Figure 2 As shown, the annular crystal wheel blank obtained after machining is used as a blank for high-temperature multi-directional forging; During high-temperature multi-directional forging, the initial forging temperature is 920°C, the final forging temperature is 700°C, and the single-pass forging deformation is 50%; Multi-directional forging adopts axial-radial cycle, and the number of forging cycles is 3; (5) Hot ring rolling The annular crystal wheel casting blank obtained after high-temperature multi-directional forging is used as a hot ring rolling blank for hot ring rolling to obtain a crystal wheel ring blank; During hot ring rolling, a main roller with a horse platform is used. The longitudinal section of the main roller is trapezoidal. The main roller boss contacts the outer ring surface of the annular crystallization wheel casting. The size of the main roller boss can be adjusted each time hot ring rolling is performed. After hot ring rolling, a crystallization wheel ring billet with grooves is obtained. During hot ring rolling, the heating temperature of the annular crystallization wheel casting is 900°C, the hot ring rolling passes are 2 passes, and the deformation of a single pass is 30%; (6) Solution heat treatment The crystallized wheel ring blank obtained after hot ring rolling is subjected to solution heat treatment at a temperature of 920°C; (7) Deep cold ring rolling like Figure 3 As shown, the crystallized wheel ring blank obtained after the solution heat treatment is subjected to deep cold ring rolling; The main roll size of the last pass of hot ring rolling is used in deep cold ring rolling; the deep cold temperature is -100℃, the deep cold ring rolling pass is a single pass, and the deformation is 25%; (8) Aging heat treatment The crystallized wheel ring blank after deep cold ring rolling is subjected to aging heat treatment at a temperature of 450°C and a time of 6 hours; (9) Secondary machining The crystallized wheel ring blank after aging heat treatment is processed into the following size requirements according to the product size requirements: Figure 1 The finished product of high temperature fatigue resistant copper alloy crystallization wheel shown has a service temperature of 0-600°C, and a copper rod continuous casting and rolling production line with an annual output of ≥220,000 tons and a service life of product throughput of ≥70,000 tons.

[0023] Example 2

[0024] A method for preparing a high temperature fatigue resistant copper alloy crystallization wheel comprises the following steps: (1) Ingredients Select CuCrZrIn material, and prepare the ingredients according to the element composition of Cr 1.0wt%, Zr 0.1wt%, In 0.1wt%, Si0.05wt%, Ni 0.18wt%, O≤10ppm, and the balance is Cu, and prepare various metal materials; The element Cr is added as a CuCr20 master alloy, and the element Zr is added as a CuZr20 master alloy. (2) Vacuum electromagnetic centrifugal casting The prepared metal materials are melted and vacuum electromagnetic centrifugal casting is performed to obtain an annular crystal wheel casting blank; During vacuum electromagnetic centrifugal casting, the vacuum degree is 35Pa, the electromagnetic stirring frequency is 25HZ, and the current is 250A; During centrifugal casting, the speed of the metal mold is 200 rpm / min, the heating temperature of the centrifugal casting mold is 120°C, and the casting temperature is 1150°C; (3) First machining The annular crystal wheel casting blank obtained by vacuum electromagnetic centrifugal casting is mechanically processed to remove the oxide layer and impurity components on the surface; (4) High temperature multi-directional forging like Figure 2 As shown, the annular crystal wheel blank obtained after machining is used as a blank for high-temperature multi-directional forging; During high-temperature multi-directional forging, the initial forging temperature is 945°C, the final forging temperature is 730°C, and the single-pass forging deformation is 40%; Multi-directional forging adopts axial-radial cycle, and the number of forging cycles is 4; (5) Hot ring rolling The annular crystal wheel casting blank obtained after high-temperature multi-directional forging is used as a hot ring rolling blank for hot ring rolling to obtain a crystal wheel ring blank; During hot ring rolling, a main roller with a horse platform is used. The longitudinal section of the main roller is trapezoidal. The main roller boss contacts the outer ring surface of the annular crystallization wheel casting. The size of the main roller boss can be adjusted each time hot ring rolling is performed. After hot ring rolling, a crystallization wheel ring billet with grooves is obtained. During hot ring rolling, the heating temperature of the annular crystallization wheel casting is 850°C, the hot ring rolling passes are 3 passes, and the deformation of a single pass is 32%; (6) Solution heat treatment The crystallized ring blank obtained after hot ring rolling is subjected to solution heat treatment at a temperature of 900-950°C; (7) Deep cold ring rolling like Figure 3As shown, the crystallized wheel ring blank obtained after the solution heat treatment is subjected to deep cold ring rolling; The main roll size of the last pass of hot ring rolling is used in deep cold ring rolling; the deep cold temperature is -150℃, the deep cold ring rolling pass is a single pass, and the deformation is 29%; (8) Aging heat treatment The crystallized wheel ring blank after deep cold ring rolling is subjected to aging heat treatment at a temperature of 480°C and a time of aging heat treatment of 2h; (9) Secondary machining The crystallized wheel ring blank after aging heat treatment is processed into the following size requirements according to the product size requirements: Figure 1 The finished product of high temperature fatigue resistant copper alloy crystallization wheel shown has a service temperature of 0-600°C, and a copper rod continuous casting and rolling production line with an annual output of ≥220,000 tons and a service life of product throughput of ≥70,000 tons.

[0025] Example 3

[0026] A method for preparing a high temperature fatigue resistant copper alloy crystallization wheel comprises the following steps: (1) Ingredients Select CuCrZrIn material, and prepare the ingredients according to the element composition of Cr 0.8wt%, Zr 0.11wt%, In 0.07wt%, Si0.06wt%, Ni 0.11wt%, O≤10ppm, and the balance is Cu, and prepare various metal materials; The element Cr is added as a CuCr20 master alloy, and the element Zr is added as a CuZr20 master alloy. (2) Vacuum electromagnetic centrifugal casting The prepared metal materials are melted and vacuum electromagnetic centrifugal casting is performed to obtain an annular crystal wheel casting blank; During vacuum electromagnetic centrifugal casting, the vacuum degree is 10Pa, the electromagnetic stirring frequency is 45HZ, and the current is 100A; During centrifugal casting, the speed of the metal mold is 150 rpm / min, the heating temperature of the centrifugal casting mold is 160°C, and the casting temperature is 1250°C; (3) First machining The annular crystal wheel casting blank obtained by vacuum electromagnetic centrifugal casting is mechanically processed to remove the oxide layer and impurity components on the surface; (4) High temperature multi-directional forging like Figure 2 As shown, the annular crystal wheel blank obtained after machining is used as a blank for high-temperature multi-directional forging; During high-temperature multi-directional forging, the initial forging temperature is 905°C, the final forging temperature is 700°C, and the single-pass forging deformation is 60%; Multi-directional forging adopts axial-radial cycle, and the number of forging cycles is 4; (5) Hot ring rolling The annular crystal wheel casting blank obtained after high-temperature multi-directional forging is used as a hot ring rolling blank for hot ring rolling to obtain a crystal wheel ring blank; During hot ring rolling, a main roller with a horse platform is used. The longitudinal section of the main roller is trapezoidal. The main roller boss contacts the outer ring surface of the annular crystallization wheel casting. The size of the main roller boss can be adjusted each time hot ring rolling is performed. After hot ring rolling, a crystallization wheel ring billet with grooves is obtained. During hot ring rolling, the heating temperature of the annular crystallization wheel casting is 920°C, the hot ring rolling passes are 2 passes, and the deformation of a single pass is 35%; (6) Solution heat treatment The crystallized ring blank obtained after hot ring rolling is subjected to solution heat treatment at a temperature of 900-950°C; (7) Deep cold ring rolling like Figure 3 As shown, the crystallized wheel ring blank obtained after the solution heat treatment is subjected to deep cold ring rolling; The main roll size of the last pass of hot ring rolling is used in deep cold ring rolling; the deep cold temperature is -200, the deep cold ring rolling pass is a single pass, and the deformation is 27%; The crystallized wheel blank obtained after hot ring rolling is subjected to deep cold ring rolling. The roll size of the last pass of hot ring rolling is used in deep cold ring rolling. The deep cold temperature is -100°C. The deep cold ring rolling pass is single pass, and the deformation is 25%; (8) Aging heat treatment The crystallized wheel ring blank after deep cold ring rolling is subjected to aging heat treatment at a temperature of 430°C and a time of 4h; (9) Secondary machining The crystallized wheel ring blank after aging heat treatment is processed into the following size requirements according to the product size requirements: Figure 1 The finished product of high temperature fatigue resistant copper alloy crystallization wheel shown has a service temperature of 0-600°C, and a copper rod continuous casting and rolling production line with an annual output of ≥220,000 tons and a service life of product throughput of ≥70,000 tons.

[0027] The above embodiments are merely preferred implementations of the present invention. Any simple modification, amendment and substitution of the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A method for preparing a high temperature fatigue resistant copper alloy crystal wheel, characterized in that: The following steps are involved: (1) Ingredients Select CuCrZrIn material, and prepare the ingredients according to the element composition of Cr 0.6-1.0wt%, Zr 0.1-0.15wt%, In 0.05-0.1wt%, Si 0.05-0.1wt%, Ni 0.1-0.2wt%, O≤10ppm, and the balance is Cu, and equip various metal materials; (2) Vacuum electromagnetic centrifugal casting The prepared metal materials are melted and vacuum electromagnetic centrifugal casting is performed to obtain an annular crystal wheel casting blank; (3) First machining The annular crystal wheel casting blank obtained by vacuum electromagnetic centrifugal casting is machined to remove the oxide layer and impurities on the surface; (4) High temperature multi-directional forging The annular crystal wheel casting obtained after machining is used as a blank material for high temperature multi-directional forging; (5) Hot ring rolling The annular crystal wheel casting blank obtained after high-temperature multi-directional forging is used as a hot ring rolling blank for hot ring rolling to obtain a crystal wheel ring blank; (6) Solution heat treatment The crystallized ring blank obtained after hot ring rolling is subjected to solution heat treatment at a temperature of 900-950°C; (7) Deep cold ring rolling The crystallized wheel ring blank obtained after the solution heat treatment is subjected to deep cold ring rolling; (8) Aging heat treatment The crystallized wheel ring blank after deep cold ring rolling is subjected to aging heat treatment, the aging heat treatment temperature is 430-480°C, and the aging heat treatment time is 2-6 hours; (9) Secondary machining The crystal wheel ring blank after aging heat treatment is processed into a finished high temperature fatigue resistant copper alloy crystal wheel according to product size requirements.

2. The method for preparing a high temperature fatigue resistant copper alloy crystal wheel according to claim 1, characterized in that: In step (1), the element Cr is added in the form of a CuCr20 master alloy, and the element Zr is added in the form of a CuZr20 master alloy.

3. The method for preparing a high temperature fatigue resistant copper alloy crystal wheel according to claim 1, characterized in that: In step (2), during vacuum electromagnetic centrifugal casting, the vacuum degree is 5-50 Pa, the electromagnetic stirring frequency is 10-60 Hz, and the current is 100-300 A; During centrifugal casting, the rotation speed of the metal mold is 100-200 rpm / min, the heating temperature of the centrifugal casting mold is 100-200°C, and the casting temperature is 1150-1250°C.

4. The method for preparing a high temperature fatigue resistant copper alloy crystal wheel according to claim 1, characterized in that: In step (4), during high temperature multi-directional forging, the initial forging temperature is 900-950°C, the final forging temperature is 700-750°C, and the single-pass forging deformation is 40-60%; Multi-directional forging adopts axial-radial cycle, and the number of forging cycles is 3 to 4.

5. The method for preparing a high temperature fatigue resistant copper alloy crystal wheel according to claim 1, characterized in that: In step (5), a main roller with a horse platform is used during hot ring rolling, the longitudinal section of the main roller is a trapezoid, the main roller boss is in contact with the outer ring surface of the annular crystallization wheel casting, and the size of the main roller boss can be adjusted each time the hot ring rolling is performed. After the hot ring rolling, a crystallization wheel ring billet with a groove is obtained; During hot ring rolling, the heating temperature of the annular crystallization wheel casting is 850-920°C, the hot ring rolling passes are 2-3 passes, and the deformation amount of a single pass is 30-35%.

6. The method for preparing a high temperature fatigue resistant copper alloy crystal wheel according to claim 1, characterized in that: In step (7), the main rolling roll size of the last pass of hot ring rolling is used during deep cold ring rolling; the deep cold temperature is -200 to -100°C, the deep cold ring rolling pass is a single pass, and the deformation amount is 25 to 30%.

7. The method for preparing a high temperature fatigue resistant copper alloy crystal wheel according to claim 1, characterized in that: In step (9), the service temperature of the high temperature fatigue resistant copper alloy crystallization wheel is 0-600°C, and the service life of the copper rod continuous casting and rolling production line with an annual output of ≥220,000 tons is a product throughput of ≥70,000 tons.

8. A high temperature fatigue resistant copper alloy crystal wheel prepared by the preparation method according to any one of claims 1 to 7.

9. Use of the high temperature fatigue resistant copper alloy crystallization wheel according to claim 8 in continuous casting and rolling production.

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