CN113369824B - Production process of novel copper alloy plate strip material for welding - Google Patents
Production process of novel copper alloy plate strip material for welding Download PDFInfo
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Abstract
The invention relates to a production process of a novel copper alloy plate strip material for welding, which comprises the following steps: step S1: melting a blank, namely adding a copper ingot into a horizontal continuous casting furnace for melting, wherein the melting temperature is set to be above 1190 ℃, respectively adding a tin ingot and a copper phosphorus alloy according to design requirements after the copper ingot is melted into copper liquid, and controlling the Sn content to be 11.0-13.0% and the P content to be 0.25-0.50%; step S2: horizontal continuous casting; step S3: carrying out homogenization annealing; step S4: milling four sides; step S5: rolling, namely performing rough rolling, trimming, intermediate rolling and finish rolling on the milled casting twice in sequence to obtain a primary 0.10mm copper strip product; step S6: degreasing and cleaning; step S7: stretch bending and straightening; step S8: cutting the finished product; step S9: and packaging, and after the inspection is qualified, packaging the product, and warehousing for storage. The production process realizes the production of the ultrathin copper strip with the thickness of 0.10mm on the basis of avoiding the problem of edge cracking or fracture.
Description
Technical Field
The invention relates to the technical field of copper alloy processing, in particular to a production process of a novel copper alloy plate strip material for welding.
Background
Tin-phosphor bronze is generally used for manufacturing springs and spring contact pieces with good conductivity, and wear-resistant parts and diamagnetic parts in precision instruments, such as gears, brush boxes, vibrating pieces, contactors and the like. Tin bronze is a non-ferrous metal alloy with the smallest casting shrinkage rate, is used for producing castings with complex shapes, clear profiles and low air tightness requirements, is very corrosion-resistant in atmosphere, seawater, fresh water and steam, and is widely used for steam boilers and marine vessel parts. The phosphor-containing tin bronze has good mechanical properties, and is used as a wear-resistant part and an elastic part of a high-precision machine tool.
In the prior art, the tin-phosphor bronze strip mainly comprises Sn and P, wherein the weight content of Sn is 8.0-9.3%; the weight content of P is 0.10-0.19%, the rest is copper, and the melting point is about 1020 ℃. The customer finds some problems in the welding process using the copper strip, mainly because the brazing temperature is higher and needs to be higher than 1020 ℃, the stainless steel plate is deformed in the welding process, and the performance of the stainless steel is possibly influenced to a certain extent, so in order to improve the quality of the stainless steel core plate and reduce the production cost, the customer puts forward to our department the desire to develop a novel copper brazing material on the basis of the existing tin-phosphor bronze alloy strip, the melting point is 850-.
As is well known, the melting point of metal materials is mainly related to the components, so the main research object of the project is to reduce the melting point of the materials by adding proper alloy elements, such as increasing the content of Sn and P in the original tin-phosphor bronze or adding other alloy elements, and realize the production of the ultrathin copper strip with the thickness of 0.10mm in industrial production. However, when the content of Sn and P is increased in a large amount or other alloying elements are added to the original tin-phosphor bronze strip, the properties of the material are greatly affected, the hardness of the strip is increased, the plasticity is reduced, and the problem of edge cracking or fracture is likely to occur during the rolling overshoot of the strip, so that it is necessary to perform production test evaluation by removing the alloying elements.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a novel production process of a copper alloy plate strip material for welding, which is characterized in that a finished product is rolled by adopting 20-roll mill equipment by adjusting the rolling process, reasonably distributing the processing rate of each pass of rolling, an intermediate annealing process and other parameters, the roughness of a roller is strictly controlled, the melting point of the copper alloy strip for welding is effectively reduced, and the production of an ultrathin copper strip with the thickness of 0.10mm is realized on the basis of avoiding the problem of edge cracking or fracture.
The above object of the present invention is achieved by the following technical solutions:
a production process of a novel copper alloy plate strip material for welding comprises the following steps:
step S1: melting a blank, namely adding a copper ingot into a horizontal continuous casting furnace for melting, wherein the melting temperature is set to be above 1190 ℃, respectively adding a tin ingot and a copper phosphorus alloy according to design requirements after the copper ingot is melted into copper liquid, and controlling the Sn content to be 11.0-13.0% and the P content to be 0.25-0.50%;
step S2: horizontal continuous casting, namely continuously drawing and casting a copper strip blank with the thickness of 16mm by using a horizontal continuous casting furnace;
step S3: homogenizing annealing, namely putting the copper strip blank into a bell jar furnace for homogenizing annealing treatment, wherein the annealing process is 680-720 ℃/10 h;
step S4: milling four sides, namely milling oxide skins on the upper surface, the lower surface and the side surfaces of the copper strip blank by using a face milling machine, wherein the thickness of the copper strip after face milling is 15 mm;
step S5: rolling, namely performing rough rolling, trimming, intermediate rolling and finish rolling on the milled casting twice in sequence to obtain a primary 0.10mm copper strip product;
step S6: degreasing and cleaning, namely performing alkali washing, acid washing, clear water cleaning and passivation treatment on the copper strip on a cleaning machine table to remove grease on the surface of the copper strip, and performing passivation treatment to obtain an anti-oxidation layer;
step S7: stretch bending and straightening, namely processing the copper strip on a stretch bending and straightening machine to enable the copper strip to be flat;
step S8: cutting the copper strip into the width size required by a customer according to the requirement of an order, cutting the product by using a cutting machine, and sending the sample to detect the performance;
step S9: and packaging, and after the inspection is qualified, packaging the product, and warehousing for storage.
The present invention in a preferred example may be further configured to: in step S1, the Sn content is 12.0% and the P content is 0.375%.
The present invention in a preferred example may be further configured to: the step S5 includes:
primary rough rolling: cogging by adopting a roughing mill, and rolling the copper strip to the thickness of 5mm by multiple passes;
secondary rough rolling: rolling the annealed copper strip by using a roughing mill again to obtain a rolled thickness of 1.8 mm;
trimming: cutting off the cracked part of the side edge of the copper strip, wherein the width of the single edge is 5-10 mm;
intermediate rolling: rolling the copper strip after discharging by adopting a medium rolling mill, wherein the rolled thickness is 0.60 mm;
20-roller finish rolling: and rolling the copper strip by adopting a 20-roller finishing mill, and ensuring to obtain accurate size parameters of the copper strip with the thickness of 0.10 mm.
The present invention in a preferred example may be further configured to: adding a first intermediate annealing process between the primary rough rolling and the secondary rough rolling, and placing the copper strip material in a bell jar furnace for annealing, wherein the process is 550-;
and a second intermediate annealing process is added between the trimming and the middle rolling, and the bell jar furnace is used for annealing again, wherein the process is 500-.
The present invention in a preferred example may be further configured to: and a rapid annealing process is additionally arranged between the middle rolling and the 20-roller finish rolling, rapid annealing is carried out by adopting an air cushion furnace, the temperature is 700 ℃, and the annealing speed is determined according to the thickness of the material.
The present invention in a preferred example may be further configured to: in step S3, the bell jar furnace uses a high hydrogen shield gas during the homogenizing annealing process.
In summary, the invention includes at least one of the following beneficial technical effects:
1. through experimental research, the tin ingot and the copper phosphorus alloy are respectively added according to the design requirements after the copper ingot is melted into copper liquid, the components of the material are controlled to be that the weight content of Sn is 11.0-13.0%, the weight content of P is 0.25-0.50%, and after the new material produced by the process is detected, the melting point is about 930 ℃, and in the past, the melting point is about 1020 ℃, so that the melting point of the copper alloy strip for welding is effectively reduced.
2. The method realizes the production of the ultrathin copper strip with the thickness of 0.10mm by adjusting the rolling process, reasonably distributing the processing rate of each pass of rolling, an intermediate annealing process and other parameters, adopting 20-roller rolling mill equipment to roll the finished product and strictly controlling the roughness of the roller.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, the production process of the novel copper alloy plate strip material for welding disclosed by the invention comprises the following steps:
step S1: melting a blank, namely adding a copper ingot into a horizontal continuous casting furnace for melting, wherein the melting temperature is set to be above 1190 ℃, respectively adding a tin ingot and a copper phosphorus alloy according to design requirements after the copper ingot is melted into copper liquid, controlling the weight content of Sn to be 11.0-13.0%, controlling the weight content of P to be 0.25-0.50%, further controlling the weight content of Sn to be 12.0%, and controlling the weight content of P to be 0.375%;
step S2: horizontal continuous casting, namely continuously drawing and casting a copper strip blank with the thickness of 16mm by using a horizontal continuous casting furnace;
step S3: homogenizing annealing, namely putting the copper strip blank into a bell jar furnace for homogenizing annealing treatment, wherein the annealing process is 700 ℃/10h, and the bell jar furnace adopts high-hydrogen protective gas in the homogenizing annealing treatment process;
step S4: milling four sides, namely milling oxide skins on the upper surface, the lower surface and the side surfaces of the copper strip blank by using a face milling machine, wherein the thickness of the copper strip after face milling is 15 mm;
step S5: rolling, namely performing rough rolling, trimming, intermediate rolling and finish rolling on the milled casting twice in sequence to obtain a primary 0.10mm copper strip product;
wherein, step S5 includes the following substeps:
primary rough rolling: cogging by adopting a roughing mill, and rolling the copper strip to the thickness of 5mm by multiple passes;
secondary rough rolling: rolling the annealed copper strip by using a roughing mill again to obtain a rolled thickness of 1.8 mm;
trimming: cutting off the cracked part of the side edge of the copper strip, wherein the width of the single edge is 7.5 mm;
intermediate rolling: rolling the copper strip after discharging by adopting a medium rolling mill, wherein the rolled thickness is 0.60 mm;
20-roller finish rolling: and rolling the copper strip by adopting a 20-roller finishing mill, and ensuring to obtain accurate size parameters of the copper strip with the thickness of 0.10 mm.
Wherein, a first intermediate annealing procedure is additionally arranged between the primary rough rolling and the secondary rough rolling, and the copper strip material is placed in a bell jar furnace for annealing, and the process is 575 ℃/8 h. And a second intermediate annealing process is added between the trimming and the intermediate rolling, and the annealing is carried out by using a bell jar furnace again, wherein the process is 525 ℃/8 h. And a rapid annealing process is additionally arranged between the middle rolling and the 20-roller finish rolling, rapid annealing is carried out by adopting an air cushion furnace, the temperature is 700 ℃, and the annealing speed is determined according to the thickness of the material.
Step S6: degreasing and cleaning, namely performing alkali washing, acid washing, clear water cleaning and passivation treatment on the copper strip on a cleaning machine table to remove grease on the surface of the copper strip, and performing passivation treatment to obtain an anti-oxidation layer;
step S7: stretch bending and straightening, namely processing the copper strip on a stretch bending and straightening machine to enable the copper strip to be flat;
step S8: cutting the copper strip into the width size required by a customer according to the requirement of an order, cutting the product by using a cutting machine, and sending the sample to detect the performance;
step S9: and packaging, and after the inspection is qualified, packaging the product, and warehousing for storage.
Example two:
referring to fig. 1, the production process of the novel copper alloy plate strip material for welding disclosed by the invention comprises the following steps:
step S1: melting the blank, adding a copper ingot into a horizontal continuous casting furnace for melting, wherein the melting temperature is set to be above 1190 ℃, respectively adding a tin ingot and a copper phosphorus alloy according to design requirements after the copper ingot is melted into copper liquid, controlling the weight content of Sn to be 11.0-13.0%, controlling the weight content of P to be 0.25-0.50%, further controlling the weight content of Sn to be 11%, and controlling the weight content of P to be 0.25%.
Step S2: horizontal continuous casting, namely continuously drawing and casting a copper strip blank with the thickness of 16mm by using a horizontal continuous casting furnace;
step S3: homogenizing annealing, namely putting the copper strip blank into a bell jar furnace for homogenizing annealing treatment, wherein the annealing process is 680 ℃/10h, and in the homogenizing annealing treatment process, the bell jar furnace adopts high hydrogen protective gas;
step S4: milling four sides, namely milling oxide skins on the upper surface, the lower surface and the side surfaces of the copper strip blank by using a face milling machine, wherein the thickness of the copper strip after face milling is 15 mm;
step S5: rolling, namely performing rough rolling, trimming, intermediate rolling and finish rolling on the milled casting twice in sequence to obtain a primary 0.10mm copper strip product;
wherein, step S5 includes the following substeps:
primary rough rolling: cogging by adopting a roughing mill, and rolling the copper strip to the thickness of 5mm by multiple passes;
secondary rough rolling: rolling the annealed copper strip by using a roughing mill again to obtain a rolled thickness of 1.8 mm;
trimming: cutting off the cracked part of the side edge of the copper strip, wherein the width of the single edge is 5 mm;
intermediate rolling: rolling the copper strip after discharging by adopting a medium rolling mill, wherein the rolled thickness is 0.60 mm;
20-roller finish rolling: and rolling the copper strip by adopting a 20-roller finishing mill, and ensuring to obtain accurate size parameters of the copper strip with the thickness of 0.10 mm.
Wherein, a first intermediate annealing procedure is additionally arranged between the primary rough rolling and the secondary rough rolling, and the copper strip material is placed in a bell jar furnace for annealing, and the process is 550 ℃/8 h. And a second intermediate annealing process is added between the trimming and the intermediate rolling, and the annealing is carried out by using a bell jar furnace again, wherein the process is 500 ℃/8 h. And a rapid annealing process is additionally arranged between the middle rolling and the 20-roller finish rolling, rapid annealing is carried out by adopting an air cushion furnace, the temperature is 700 ℃, and the annealing speed is determined according to the thickness of the material.
Step S6: degreasing and cleaning, namely performing alkali washing, acid washing, clear water cleaning and passivation treatment on the copper strip on a cleaning machine table to remove grease on the surface of the copper strip, and performing passivation treatment to obtain an anti-oxidation layer;
step S7: stretch bending and straightening, namely processing the copper strip on a stretch bending and straightening machine to enable the copper strip to be flat;
step S8: cutting the copper strip into the width size required by a customer according to the requirement of an order, cutting the product by using a cutting machine, and sending the sample to detect the performance;
step S9: and packaging, and after the inspection is qualified, packaging the product, and warehousing for storage.
Example three:
referring to fig. 1, the production process of the novel copper alloy plate strip material for welding disclosed by the invention comprises the following steps:
step S1: melting the blank, adding a copper ingot into a horizontal continuous casting furnace for melting, wherein the melting temperature is set to be above 1190 ℃, respectively adding a tin ingot and a copper phosphorus alloy according to design requirements after the copper ingot is melted into copper liquid, controlling the weight content of Sn to be 11.0-13.0%, controlling the weight content of P to be 0.25-0.50%, further controlling the weight content of Sn to be 13%, and controlling the weight content of P to be 0.50%.
Step S2: horizontal continuous casting, namely continuously drawing and casting a copper strip blank with the thickness of 16mm by using a horizontal continuous casting furnace;
step S3: homogenizing annealing, namely putting the copper strip blank into a bell jar furnace for homogenizing annealing treatment, wherein the annealing process is 720 ℃/10h, and in the homogenizing annealing treatment process, the bell jar furnace adopts high-hydrogen protective gas;
step S4: milling four sides, namely milling oxide skins on the upper surface, the lower surface and the side surfaces of the copper strip blank by using a face milling machine, wherein the thickness of the copper strip after face milling is 15 mm;
step S5: rolling, namely performing rough rolling, trimming, intermediate rolling and finish rolling on the milled casting twice in sequence to obtain a primary 0.10mm copper strip product;
wherein, step S5 includes the following substeps:
primary rough rolling: cogging by adopting a roughing mill, and rolling the copper strip to the thickness of 5mm by multiple passes;
secondary rough rolling: rolling the annealed copper strip by using a roughing mill again to obtain a rolled thickness of 1.8 mm;
trimming: cutting off the cracked part of the side edge of the copper strip, wherein the width of the single edge is 10 mm;
intermediate rolling: rolling the copper strip after discharging by adopting a medium rolling mill, wherein the rolled thickness is 0.60 mm;
20-roller finish rolling: and rolling the copper strip by adopting a 20-roller finishing mill, and ensuring to obtain accurate size parameters of the copper strip with the thickness of 0.10 mm.
Wherein, a first intermediate annealing procedure is additionally arranged between the primary rough rolling and the secondary rough rolling, and the copper strip material is placed in a bell jar furnace for annealing, and the process is 600 ℃/8 h. And a second intermediate annealing process is added between the trimming and the intermediate rolling, and the annealing is carried out by using a bell jar furnace again, wherein the process is 550 ℃/8 h. And a rapid annealing process is additionally arranged between the middle rolling and the 20-roller finish rolling, rapid annealing is carried out by adopting an air cushion furnace, the temperature is 700 ℃, and the annealing speed is determined according to the thickness of the material.
Step S6: degreasing and cleaning, namely performing alkali washing, acid washing, clear water cleaning and passivation treatment on the copper strip on a cleaning machine table to remove grease on the surface of the copper strip, and performing passivation treatment to obtain an anti-oxidation layer;
step S7: stretch bending and straightening, namely processing the copper strip on a stretch bending and straightening machine to enable the copper strip to be flat;
step S8: cutting the copper strip into the width size required by a customer according to the requirement of an order, cutting the product by using a cutting machine, and sending the sample to detect the performance;
step S9: and packaging, and after the inspection is qualified, packaging the product, and warehousing for storage.
Referring to the above tables, experimental studies have found that after a copper ingot is melted into a copper solution, a tin ingot and a copper phosphorus alloy are respectively added according to design requirements, and the components of the material are controlled to be that the weight content of Sn is 11.0-13.0%, and the weight content of P is 0.25-0.50%.
The method realizes the production of the ultrathin copper strip with the thickness of 0.10mm by adjusting the rolling process, reasonably distributing the processing rate of each pass of rolling, an intermediate annealing process and other parameters, adopting 20-roller rolling mill equipment to roll the finished product and strictly controlling the roughness of the roller.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (5)
1. A production process of a novel copper alloy plate strip material for welding is characterized by comprising the following steps: the method comprises the following steps:
step S1: melting a blank, namely adding a copper ingot into a horizontal continuous casting furnace for melting, wherein the melting temperature is set to be above 1190 ℃, respectively adding a tin ingot and a copper phosphorus alloy according to design requirements after the copper ingot is melted into copper liquid, and controlling the Sn content to be 11.0-13.0% and the P content to be 0.25-0.50%;
step S2: horizontal continuous casting, namely continuously drawing and casting a copper strip blank with the thickness of 16mm by using a horizontal continuous casting furnace;
step S3: homogenizing annealing, namely putting the copper strip blank into a bell jar furnace for homogenizing annealing treatment, wherein the annealing process is 680-720 ℃/10 h;
step S4: milling four sides, namely milling oxide skins on the upper surface, the lower surface and the side surfaces of the copper strip blank by using a face milling machine, wherein the thickness of the copper strip after face milling is 15 mm;
step S5:
primary rough rolling: cogging by adopting a roughing mill, and rolling the copper strip to the thickness of 5mm by multiple passes;
secondary rough rolling: rolling the annealed copper strip by using a roughing mill again to obtain a rolled thickness of 1.8 mm;
trimming: cutting off the cracked part of the side edge of the copper strip, wherein the width of the single edge is 5-10 mm;
intermediate rolling: rolling the copper strip after discharging by adopting a medium rolling mill, wherein the rolled thickness is 0.60 mm;
20-roller finish rolling: rolling the copper strip by adopting a 20-roller finishing mill, and ensuring to obtain accurate size parameters of the copper strip with the thickness of 0.10 mm;
step S6: degreasing and cleaning, namely performing alkali washing, acid washing, clear water cleaning and passivation treatment on the copper strip on a cleaning machine table to remove grease on the surface of the copper strip, and performing passivation treatment to obtain an anti-oxidation layer;
step S7: stretch bending and straightening, namely processing the copper strip on a stretch bending and straightening machine to enable the copper strip to be flat;
step S8: cutting the copper strip into the width size required by a customer according to the requirement of an order, cutting the product by using a cutting machine, and sending the sample to detect the performance;
step S9: and packaging, and after the inspection is qualified, packaging the product, and warehousing for storage.
2. The production process of a novel copper alloy strip material for welding according to claim 1, characterized in that: in step S1, the Sn content is 12.0% and the P content is 0.375%.
3. The production process of a novel copper alloy strip material for welding according to claim 1, characterized in that: adding a first intermediate annealing process between the primary rough rolling and the secondary rough rolling, and placing the copper strip material in a bell jar furnace for annealing, wherein the process is 550-;
and a second intermediate annealing process is added between the trimming and the middle rolling, and the bell jar furnace is used for annealing again, wherein the process is 500-.
4. The production process of a novel copper alloy strip material for welding according to claim 1, characterized in that: and a rapid annealing process is additionally arranged between the middle rolling and the 20-roller finish rolling, rapid annealing is carried out by adopting an air cushion furnace, the temperature is 700 ℃, and the annealing speed is determined according to the thickness of the material.
5. The production process of a novel copper alloy strip material for welding according to claim 1, characterized in that: in step S3, the bell jar furnace uses a high hydrogen shield gas during the homogenizing annealing process.
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| CN113981266B (en) * | 2021-10-25 | 2022-11-25 | 鑫谷和金属(无锡)有限公司 | High-performance phosphor bronze strip and production process thereof |
| CN114918622B (en) * | 2022-05-31 | 2023-10-20 | 江苏苏讯新材料科技股份有限公司 | Deep-drawing tank processing technology |
| CN116372517B (en) * | 2023-04-07 | 2023-11-14 | 江苏亨通精密铜业有限公司 | Copper strip cleaning and tape connecting structure and process for connecting piece |
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| JPH0336246A (en) * | 1989-07-04 | 1991-02-15 | Furukawa Electric Co Ltd:The | Production of phosphor bronze alloy |
| EP0992615B1 (en) * | 1998-10-01 | 2001-02-14 | Lamitref Industries N.V. | Startkathoden aus Kupferband für die Kupferelektrolyse und Verfahren zu deren Herstellung |
| JP2002302721A (en) * | 2001-01-31 | 2002-10-18 | Nippon Mining & Metals Co Ltd | Phosphor bronze strip, and terminal and connector using the same |
| CN100500362C (en) * | 2004-11-24 | 2009-06-17 | 哈尔滨工业大学 | High-plasticity Cu-P brazing filler alloy and its preparation |
| CN102069354A (en) * | 2010-12-25 | 2011-05-25 | 安徽鑫科新材料股份有限公司 | Production process of tin-copper alloy strip |
| CN107604202B (en) * | 2017-09-18 | 2020-01-21 | 宁波兴业盛泰集团有限公司 | High-performance phosphor bronze strip and preparation method thereof |
| CN107699730A (en) * | 2017-11-16 | 2018-02-16 | 宁波兴业盛泰集团有限公司 | A kind of corrosion resistant high-strength tin copper-phosphorus alloy and its forming technology |
| CN109266877B (en) * | 2018-11-01 | 2019-11-08 | 福建紫金铜业有限公司 | A kind of preparation method of high property copper alloy |
| CN111394610B (en) * | 2020-04-29 | 2021-03-23 | 福建紫金铜业有限公司 | Production process of copper plate and strip materials of VC (polyvinyl chloride) uniform-temperature plates for 5G |
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