CN114310170B - Preparation method of copper beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing - Google Patents
Preparation method of copper beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing Download PDFInfo
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Abstract
A preparation method of a copper beryllium alloy wide high-precision ultrathin belt based on 3D printing relates to a preparation method of a wide high-precision ultrathin belt. The invention aims to solve the problems that the copper beryllium alloy ultrathin strip prepared by the prior method has long production flow, high preparation cost and higher deformation resistance, so that the copper beryllium alloy ultrathin strip with the width of 1 m-2 m prepared by the prior method is easy to crack and difficult to form in the forming process. The method comprises the following steps: 1. arc additive manufacturing; 2. solution treatment; 3. milling; 4. finish rolling by four rollers; 5. on-line bright annealing; 6. stretching and straightening the twenty-third roller; 7. twenty-high roll finish rolling; 8. splitting, shaping and rolling. The method directly bypasses the technical links of large-size ingot casting preparation and rough rolling, adopts a 3D printing method to prepare the ultrathin strip blank, saves smelting and rough rolling, saves energy and reduces production cost while protecting environment. The invention can obtain a copper beryllium alloy wide-width high-precision ultrathin belt for 3D printing.
Description
Technical Field
The invention relates to a preparation method of a wide high-precision ultrathin belt.
Background
The copper beryllium alloy belongs to precipitation hardening alloy, and the copper beryllium alloy ultrathin strip (with the thickness of less than 0.1 mm) after solution treatment and secondary processing or aging treatment has good electrical conductivity, thermal conductivity, high strength, high hardness, high elasticity, corrosion resistance, wear resistance, fatigue resistance, forgeability, non-ignition property, non-magnetism and other excellent performances, and is widely applied to the fields of computers, electric and electronic elements, automobiles and the like. The traditional copper-beryllium ultrathin strip is mostly produced by adopting a process flow of semi-continuous casting and multi-pass rolling, a metallographic structure diagram is shown in a figure 3 (b) of an attached drawing in the specification, and the method has the following problems: (1) long production flow and high preparation cost. The traditional copper-beryllium alloy preparation needs smelting, casting, rough rolling, finish rolling, solid solution, acid washing, final rolling and other processes, and because the copper-beryllium alloy has high resistance, the large cast ingot preparation process has high requirements, the cast ingot needs more rolling passes and annealing times, the production period is long, and meanwhile, equipment such as a large vacuum smelting furnace, a roughing mill, a finishing mill, a continuous online annealing furnace and the like needs to be put into, so that the investment of a production line is huge, and the production cost is high; (2) The wide (1 m-2 m) copper beryllium alloy ultrathin strip prepared by the traditional method is extremely easy to crack and difficult to form in the forming process due to the higher deformation resistance. In the published materials, the rapid solidification process represented by single-roller spin quenching, jet deposition and the like can well overcome the technical problems of high deformation resistance and difficult forming of copper-beryllium alloy, and can form ultrathin narrow bands, but the method cannot form wide ultrathin bands due to the characteristics of process routes.
Disclosure of Invention
The invention aims to solve the problems that the copper beryllium alloy ultrathin strip prepared by the existing method has long production flow, high preparation cost and high deformation resistance, and the copper beryllium alloy ultrathin strip with the width of 1 m-2 m prepared by the traditional method is easy to crack and difficult to form in the forming process, and provides a preparation method of the copper beryllium alloy wide-width high-precision ultrathin strip short flow based on 3D printing.
The preparation method of the copper beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing is completed according to the following steps:
1. arc additive manufacturing:
arc additive manufacturing is carried out on a copper substrate with water cooling by taking copper-beryllium alloy wires as raw materials, so as to obtain a copper-beryllium alloy strip blank;
in the arc additive manufacturing process, under the protection of protective gas, a copper beryllium alloy wire is connected with the positive electrode of a hot wire power supply, the negative electrode of the hot wire power supply is connected with a copper substrate, the path of the arc additive manufacturing process is multi-layer single-pass welding, after one layer of deposition is completed, arc quenching is carried out, wire feeding is stopped, 40-80 s are waited for, arc starting is carried out again, the wire feeding is carried out arc additive manufacturing, reciprocal direction overlaying is carried out, and the operation is repeated to obtain a strip blank with the width of 1.5-3 m and the thickness of 7-8 mm;
2. solution treatment:
carrying out solution heat treatment on a strip blank with the width of 1.5-3 m and the thickness of 7-8 mm at 750-820 ℃, and then cooling to obtain a copper beryllium alloy strip blank in a solid solution state;
3. milling:
placing the copper beryllium alloy strip in a solid solution state on a milling machine for milling, so that the surface roughness of the copper beryllium alloy strip is less than or equal to 3.2 mu m, and obtaining a copper beryllium alloy plate with the thickness of 4-5 mm;
4. four-roller finish rolling:
performing reciprocating finish rolling on a copper beryllium alloy sheet with the thickness of 4-5 mm on a reversible four-roller mill to obtain copper beryllium alloy strip coils with the thickness of 0.2-0.5 mm;
5. on-line bright annealing:
carrying out bright annealing on the copper beryllium alloy strip coil with the thickness of 0.2-0.5 mm in a continuous online bright annealing furnace to obtain an annealed copper beryllium alloy strip coil;
6. twenty-third roller stretch bending and straightening:
straightening the annealed copper-beryllium alloy strip coil on a twenty-three roller stretch-bending straightener to obtain a straightened copper-beryllium alloy strip coil;
7. twenty-high finish rolling:
carrying out finish rolling deformation on the straightened copper-beryllium alloy strip coil on a reversible twenty-high roll mill to obtain a copper-beryllium alloy ultrathin strip with the width of 1.5-3 m and the thickness of 0.05-0.1 mm;
8. splitting, shaping and rolling:
and (3) according to the requirements of users, splitting, shaping, trimming and rolling the copper beryllium alloy ultrathin strip with the thickness of 0.05-0.1 mm to obtain the 3D printed copper beryllium alloy wide-width high-precision ultrathin strip.
Drawings
FIG. 1 is a schematic illustration of a process of wire arc additive manufacturing of the present invention;
fig. 2 is a preparation flow chart of a copper beryllium alloy wide-width high-precision ultrathin strip short flow based on 3D printing;
fig. 3 is a comparative diagram of metallographic structures, in which (a) is a gold phase diagram of a wide high-precision ultrathin copper-beryllium alloy strip prepared in example 2 and (b) is a gold phase diagram of a ultrathin copper-beryllium strip prepared by a conventional process flow of semi-continuous casting and multi-pass rolling.
Detailed Description
The following examples further illustrate the invention but are not to be construed as limiting the invention. Modifications and substitutions to methods, procedures, or conditions of the present invention without departing from the spirit of the invention are intended to be within the scope of the present invention.
The first embodiment is as follows: the preparation method of the copper beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing is completed according to the following steps:
1. arc additive manufacturing:
arc additive manufacturing is carried out on a copper substrate with water cooling by taking copper-beryllium alloy wires as raw materials, so as to obtain a copper-beryllium alloy strip blank;
in the arc additive manufacturing process, under the protection of protective gas, a copper beryllium alloy wire is connected with the positive electrode of a hot wire power supply, the negative electrode of the hot wire power supply is connected with a copper substrate, the path of the arc additive manufacturing process is multi-layer single-pass welding, after one layer of deposition is completed, arc quenching is carried out, wire feeding is stopped, 40-80 s are waited for, arc starting is carried out again, the wire feeding is carried out arc additive manufacturing, reciprocal direction overlaying is carried out, and the operation is repeated to obtain a strip blank with the width of 1.5-3 m and the thickness of 7-8 mm;
2. solution treatment:
carrying out solution heat treatment on a strip blank with the width of 1.5-3 m and the thickness of 7-8 mm at 750-820 ℃, and then cooling to obtain a copper beryllium alloy strip blank in a solid solution state;
3. milling:
placing the copper beryllium alloy strip in a solid solution state on a milling machine for milling, so that the surface roughness of the copper beryllium alloy strip is less than or equal to 3.2 mu m, and obtaining a copper beryllium alloy plate with the thickness of 4-5 mm;
4. four-roller finish rolling:
performing reciprocating finish rolling on a copper beryllium alloy sheet with the thickness of 4-5 mm on a reversible four-roller mill to obtain copper beryllium alloy strip coils with the thickness of 0.2-0.5 mm;
5. on-line bright annealing:
carrying out bright annealing on the copper beryllium alloy strip coil with the thickness of 0.2-0.5 mm in a continuous online bright annealing furnace to obtain an annealed copper beryllium alloy strip coil;
6. twenty-third roller stretch bending and straightening:
straightening the annealed copper-beryllium alloy strip coil on a twenty-three roller stretch-bending straightener to obtain a straightened copper-beryllium alloy strip coil;
7. twenty-high finish rolling:
carrying out finish rolling deformation on the straightened copper-beryllium alloy strip coil on a reversible twenty-high roll mill to obtain a copper-beryllium alloy ultrathin strip with the width of 1.5-3 m and the thickness of 0.05-0.1 mm;
8. splitting, shaping and rolling:
and (3) according to the requirements of users, splitting, shaping, trimming and rolling the copper beryllium alloy ultrathin strip with the thickness of 0.05-0.1 mm to obtain the 3D printed copper beryllium alloy wide-width high-precision ultrathin strip.
The second embodiment is as follows: the present embodiment differs from the specific embodiment in that: the beryllium content of the copper-beryllium alloy wire in the first step is 0.1-3.0%. The other steps are the same as in the first embodiment.
And a third specific embodiment: this embodiment differs from the first or second embodiment in that: the diameter of the copper beryllium alloy wire in the first step is 0.8 mm-1.2 mm. The other steps are the same as those of the first or second embodiment.
The specific embodiment IV is as follows: one difference between this embodiment and the first to third embodiments is that: the shielding gas in the first step is argon. The other steps are the same as those of the first to third embodiments.
Fifth embodiment: one to four differences between the present embodiment and the specific embodiment are: and in the first step, the hot wire current of the hot wire power supply is 100A-120A, and the hot wire current is a direct current power supply. Other steps are the same as those of the first to fourth embodiments.
Specific embodiment six: the present embodiment differs from the first to fifth embodiments in that: the solution heat treatment time in the second step is 6-8 hours; the cooling mode is water quenching. Other steps are the same as those of the first to fifth embodiments.
Seventh embodiment: one difference between the present embodiment and the first to sixth embodiments is that: the wire feeding speed in the arc additive manufacturing process in the step one is 5m min -1 ～8m·min -1 The material adding speed is 20cm & min -1 ～40c m·min -1 The dry extension of the welding wire is 8 mm-15 mm, and the gas flow is 18 L.min -1 ～20L·min -1 The layer height is 3.8 mm-5.7 mm. Other steps are the same as those of embodiments one to six.
Eighth embodiment: one difference between the present embodiment and the first to seventh embodiments is that: the annealing process in the fifth step is as follows: the temperature is 750-800 ℃, the coil annealing speed is 10-50 m/s, and the annealing atmosphere is hydrogen. The other steps are the same as those of embodiments one to seven.
Detailed description nine: one of the differences between this embodiment and the first to eighth embodiments is: the wire feeding speed in the arc additive manufacturing process in the step one is 7m min -1 The material adding speed is 20cm & min -1 The dry extension of the welding wire is 12mm, and the gas flow is 18 L.min -1 The layer height is 3.8 mm-5.7 mm. Other steps are the same as those of embodiments one to eight.
Detailed description ten: the present embodiment differs from the first to ninth embodiments in that: the wire feeding speed in the arc additive manufacturing process in the step one is 6m min -1 ～8m·min -1 The material adding speed is 30cm & min -1 ～40cm·min -1 The dry extension of the welding wire is 14 mm-15 mm, and the gas flow is 19 L.min -1 ～20L·min -1 The layer height is 3.8 mm-5.7 mm. The other steps are the same as those of embodiments one to nine.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Example 1: the preparation method of the copper beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing is completed according to the following steps:
1. arc additive manufacturing:
arc additive manufacturing is carried out on a copper substrate with water cooling by taking copper-beryllium alloy wires as raw materials, so as to obtain a copper-beryllium alloy strip blank;
the beryllium content in the copper-beryllium alloy wire in the first step is 0.5%;
the diameter of the copper beryllium alloy wire in the first step is 1.2mm;
the hot wire current of the hot wire power supply in the first step is 100A, and the hot wire current is a direct current power supply;
in the arc additive manufacturing process, under the protection of argon, a copper beryllium alloy wire is connected with the positive electrode of a hot wire power supply, the negative electrode of the hot wire power supply is connected with a copper substrate, the path of the arc additive manufacturing process is multi-layer single-pass welding, after one layer of deposition is completed, arc quenching is carried out, wire feeding is stopped, waiting for 40 seconds, arc starting is carried out again, wire feeding is carried out for arc additive manufacturing, reciprocal direction surfacing is carried out, and the operation is repeated to obtain a strip blank with the width of 2.8m and the thickness of 8mm;
the wire feeding speed in the arc additive manufacturing process in the step one is 7m min -1 The material adding speed is 20cm & min -1 The dry extension of the welding wire is 12mm, and the gas flow is 18 L.min -1 The layer height is 4.8mm;
2. solution treatment:
carrying out solution heat treatment on a strip blank with the width of 2.8m and the thickness of 8mm at 770 ℃ for 8 hours, and then cooling in a water quenching mode to obtain a copper beryllium alloy strip blank in a solid solution state;
3. milling:
placing the copper beryllium alloy strip in a solid solution state on a milling machine for milling, so that the surface roughness of the copper beryllium alloy strip is less than or equal to 3.2 mu m, and obtaining a copper beryllium alloy plate with the thickness of 5 mm;
4. four-roller finish rolling:
performing reciprocating finish rolling on a copper-beryllium alloy plate with the thickness of 5mm on a reversible four-roll mill to obtain a copper-beryllium alloy strip coil with the thickness of 0.4 mm;
5. on-line bright annealing:
carrying out bright annealing on the copper-beryllium alloy strip coil with the thickness of 0.4mm in a continuous online bright annealing furnace to obtain an annealed copper-beryllium alloy strip coil;
the annealing process in the fifth step is as follows: the temperature is 750 ℃, the coil annealing speed is 40m/s, and the annealing atmosphere is hydrogen;
6. twenty-third roller stretch bending and straightening:
straightening the annealed copper-beryllium alloy strip coil on a twenty-three roller stretch bending straightener to obtain a straightened copper-beryllium alloy strip coil;
7. twenty-high finish rolling:
carrying out finish rolling deformation on the straightened copper-beryllium alloy strip coil on a reversible twenty-high roll mill to obtain a copper-beryllium alloy ultrathin strip with the width of 2.8m and the thickness of 0.08 mm;
8. splitting, shaping and rolling:
and according to the requirements of users, splitting, shaping, trimming and rolling the copper beryllium alloy ultrathin strip with the thickness of 0.08mm to obtain the 3D printed copper beryllium alloy wide-width high-precision ultrathin strip.
The properties of the 3D printed beryllium copper wide high-precision ultrathin strip prepared in example 1 are shown in table 1;
TABLE 1
| Tensile strength (MPa) | 758 |
| Yield strength (MPa) | 695 |
| Elongation (%) | 16.7 |
| Thickness deviation (mm) | ±0.008 |
| Rolling weight (kg) | 600 |
Example 2: the preparation method of the copper beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing is completed according to the following steps:
1. arc additive manufacturing:
arc additive manufacturing is carried out on a copper substrate with water cooling by taking copper-beryllium alloy wires as raw materials, so as to obtain a copper-beryllium alloy strip blank;
the beryllium content in the copper-beryllium alloy wire in the first step is 1.8%;
the diameter of the copper beryllium alloy wire in the first step is 1.2mm;
the hot wire current of the hot wire power supply in the first step is 110A, and the hot wire current is a direct current power supply;
in the arc additive manufacturing process, under the protection of argon, a copper beryllium alloy wire is connected with the positive electrode of a hot wire power supply, the negative electrode of the hot wire power supply is connected with a copper substrate, the path of the arc additive manufacturing process is multi-layer single-pass welding, after one layer of deposition is completed, arc quenching is carried out, wire feeding is stopped, waiting for 60 seconds, arc starting is carried out again, wire feeding is carried out for arc additive manufacturing, reciprocal direction surfacing is carried out, and the operation is repeated to obtain a strip blank with the width of 2.1m and the thickness of 8mm;
the wire feeding speed in the arc additive manufacturing process in the step one is 6m min -1 The additive speed is 30c m min -1 The dry extension of the welding wire is 14mm, and the gas flow is 19 L.min -1 The layer height is 4.1mm;
2. solution treatment:
carrying out solution heat treatment on a strip blank with the width of 2.1m and the thickness of 8mm at 800 ℃ for 7 hours, and then cooling in a water quenching mode to obtain a copper beryllium alloy strip blank in a solid solution state;
3. milling:
placing the copper beryllium alloy strip in a solid solution state on a milling machine for milling, so that the surface roughness of the copper beryllium alloy strip is less than or equal to 3.2 mu m, and obtaining a copper beryllium alloy plate with the thickness of 5 mm;
4. four-roller finish rolling:
performing reciprocating finish rolling on a copper-beryllium alloy plate with the thickness of 5mm on a reversible four-roll mill to obtain a copper-beryllium alloy strip coil with the thickness of 0.3 mm;
5. on-line bright annealing:
carrying out bright annealing on the copper-beryllium alloy strip coil with the thickness of 0.3mm in a continuous online bright annealing furnace to obtain an annealed copper-beryllium alloy strip coil;
the annealing process in the fifth step is as follows: the temperature is 780 ℃, the coil annealing speed is 20m/s, and the annealing atmosphere is hydrogen;
6. twenty-third roller stretch bending and straightening:
straightening the annealed copper-beryllium alloy strip coil on a twenty-three roller stretch bending straightener to obtain a straightened copper-beryllium alloy strip coil;
7. twenty-high finish rolling:
carrying out finish rolling deformation on the straightened copper-beryllium alloy strip coil on a reversible twenty-high roll mill to obtain a copper-beryllium alloy ultrathin strip with the width of 2.1m and the thickness of 0.06 mm;
8. splitting, shaping and rolling:
and according to the requirements of users, splitting, shaping, trimming and rolling the copper beryllium alloy ultrathin strip with the thickness of 0.06mm to obtain the 3D printed copper beryllium alloy wide-width high-precision ultrathin strip.
The properties of the 3D printed beryllium copper wide high-precision ultrathin strip prepared in example 2 are shown in table 2;
TABLE 2
Example 3: the preparation method of the copper beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing is completed according to the following steps:
1. arc additive manufacturing:
arc additive manufacturing is carried out on a copper substrate with water cooling by taking copper-beryllium alloy wires as raw materials, so as to obtain a copper-beryllium alloy strip blank;
the beryllium content in the copper-beryllium alloy wire in the first step is 2.5%;
the diameter of the copper beryllium alloy wire in the first step is 1.2mm;
the hot wire current of the hot wire power supply in the first step is 120A, and the hot wire current is a direct current power supply;
in the arc additive manufacturing process, under the protection of argon, a copper beryllium alloy wire is connected with the positive electrode of a hot wire power supply, the negative electrode of the hot wire power supply is connected with a copper substrate, the path of the arc additive manufacturing process is multi-layer single-pass welding, after one layer of deposition is completed, arc quenching is carried out, wire feeding is stopped, 80 seconds is waited, arc starting is carried out again, wire feeding is carried out for arc additive manufacturing, reciprocal direction surfacing is carried out, and the operation is repeated to obtain a strip blank with the width of 1.7m and the thickness of 7mm;
the wire feeding speed in the arc additive manufacturing process in the step one is 8m min -1 The additive speed is 40c m min -1 The dry extension of the welding wire is 15mm, and the gas flow is 20 L.min -1 The layer height is 5.2mm;
2. solution treatment:
carrying out solution heat treatment on a strip blank with the width of 1.7m and the thickness of 7mm at 820 ℃ for 6 hours, and then cooling in a water quenching mode to obtain a copper beryllium alloy strip blank in a solid solution state;
3. milling:
placing the copper beryllium alloy strip in a solid solution state on a milling machine for milling, so that the surface roughness of the copper beryllium alloy strip is less than or equal to 3.2 mu m, and obtaining a copper beryllium alloy plate with the thickness of 4 mm;
4. four-roller finish rolling:
performing reciprocating finish rolling on a copper-beryllium alloy plate with the thickness of 4mm on a reversible four-roll mill to obtain a copper-beryllium alloy strip coil with the thickness of 0.2 mm;
5. on-line bright annealing:
carrying out bright annealing on the copper-beryllium alloy strip coil with the thickness of 0.2mm in a continuous online bright annealing furnace to obtain an annealed copper-beryllium alloy strip coil;
the annealing process in the fifth step is as follows: the temperature is 770 ℃, the coil annealing speed is 30m/s, and the annealing atmosphere is hydrogen;
6. twenty-third roller stretch bending and straightening:
straightening the annealed copper-beryllium alloy strip coil on a twenty-three roller stretch bending straightener to obtain a straightened copper-beryllium alloy strip coil;
7. twenty-high finish rolling:
carrying out finish rolling deformation on the straightened copper-beryllium alloy strip coil on a reversible twenty-high roll mill to obtain a copper-beryllium alloy ultrathin strip with the width of 1.7m and the thickness of 0.05 mm;
8. splitting, shaping and rolling:
and according to the requirements of users, splitting, shaping, trimming and rolling the copper beryllium alloy ultrathin strip with the thickness of 0.05mm to obtain the 3D printed copper beryllium alloy wide-width high-precision ultrathin strip.
The properties of the 3D printed beryllium copper wide high-precision ultrathin strip prepared in example 3 are shown in table 3;
TABLE 3 Table 3
| Tensile strength (MPa) | 851 |
| Yield strength (MPa) | 802 |
| Elongation (%) | 8.2 |
| Thickness deviation (mm) | ±0.005 |
| Rolling weight (kg) | 500 |
Claims (5)
1. The preparation method of the copper beryllium alloy wide high-precision ultrathin short-strip flow based on 3D printing is characterized by comprising the following steps of:
1. arc additive manufacturing:
arc additive manufacturing is carried out on a copper substrate with water cooling by taking copper-beryllium alloy wires as raw materials, so as to obtain a copper-beryllium alloy strip blank;
in the arc additive manufacturing process, under the protection of protective gas, a copper beryllium alloy wire is connected with the positive electrode of a hot wire power supply, the negative electrode of the hot wire power supply is connected with a copper substrate, the path of the arc additive manufacturing process is multi-layer single-pass welding, after one layer of deposition is completed, arc quenching is carried out, wire feeding is stopped, 40-80 s are waited for, arc starting is carried out again, the wire feeding is carried out arc additive manufacturing, reciprocal direction overlaying is carried out, and the operation is repeated to obtain a strip blank with the width of 1.5-3 m and the thickness of 7-8 mm;
the beryllium content in the copper-beryllium alloy wire in the first step is 0.1-3.0%;
the diameter of the copper beryllium alloy wire in the first step is 0.8 mm-1.2 mm; the hot wire current of the hot wire power supply in the first step is 100A-120A, and the hot wire current is a direct current power supply;
the wire feeding speed in the arc additive manufacturing process in the step one is 5m min -1 ～8m·min -1 The material adding speed is 20cm & min -1 ～40c m·min -1 The dry extension of the welding wire is 8 mm-15 mm, and the gas flow is 18 L.min -1 ～20L·min -1 The layer height is 3.8 mm-5.7 mm;
2. solution treatment:
carrying out solution heat treatment on a strip blank with the width of 1.5-3 m and the thickness of 7-8 mm at 750-820 ℃, and then cooling to obtain a copper beryllium alloy strip blank in a solid solution state;
the solution heat treatment time in the second step is 6-8 hours; the cooling mode is water quenching;
3. milling:
placing the copper beryllium alloy strip in a solid solution state on a milling machine for milling, so that the surface roughness of the copper beryllium alloy strip is less than or equal to 3.2 mu m, and obtaining a copper beryllium alloy plate with the thickness of 4-5 mm;
4. four-roller finish rolling:
performing reciprocating finish rolling on a copper beryllium alloy sheet with the thickness of 4-5 mm on a reversible four-roller mill to obtain copper beryllium alloy strip coils with the thickness of 0.2-0.5 mm;
5. on-line bright annealing:
carrying out bright annealing on the copper beryllium alloy strip coil with the thickness of 0.2-0.5 mm in a continuous online bright annealing furnace to obtain an annealed copper beryllium alloy strip coil;
6. twenty-third roller stretch bending and straightening:
straightening the annealed copper-beryllium alloy strip coil on a twenty-three roller stretch-bending straightener to obtain a straightened copper-beryllium alloy strip coil;
7. twenty-high finish rolling:
carrying out finish rolling deformation on the straightened copper-beryllium alloy strip coil on a reversible twenty-high roll mill to obtain a copper-beryllium alloy ultrathin strip with the width of 1.5-3 m and the thickness of 0.05-0.1 mm;
8. splitting, shaping and rolling:
and (3) according to the requirements of users, splitting, shaping, trimming and rolling the copper beryllium alloy ultrathin strip with the thickness of 0.05-0.1 mm to obtain the 3D printed copper beryllium alloy wide-width high-precision ultrathin strip.
2. The preparation method of the copper beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing according to claim 1, wherein the protective gas in the step one is argon.
3. The preparation method of the copper beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing according to claim 1, which is characterized in that the annealing process in the step five is as follows: the temperature is 750-800 ℃, the coil annealing speed is 10-50 m/s, and the annealing atmosphere is hydrogen.
4. The preparation method of the copper-beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing according to claim 1, wherein the wire feeding speed in the arc additive manufacturing process in the step one is 7m & min -1 The material adding speed is 20cm & min -1 The dry extension of the welding wire is 12mm, and the gas flow is 18 L.min -1 The layer height is 3.8 mm-5.7 mm.
5. The preparation method of the copper-beryllium alloy wide-width high-precision ultrathin strip short process based on 3D printing according to claim 1, wherein the wire feeding speed in the arc additive manufacturing process in the step one is 6m & min -1 ～8m·min -1 The material adding speed is 30cm & min -1 ～40cm·min -1 The dry extension of the welding wire is 14 mm-15 mm, and the gas flow is 19 L.min -1 ～20L·min -1 The layer height is 3.8 mm-5.7 mm.
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