CN115505767A - Manufacturing method of high-plasticity BFe10-1-1 white copper pipe - Google Patents
Manufacturing method of high-plasticity BFe10-1-1 white copper pipe Download PDFInfo
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- CN115505767A CN115505767A CN202211179713.XA CN202211179713A CN115505767A CN 115505767 A CN115505767 A CN 115505767A CN 202211179713 A CN202211179713 A CN 202211179713A CN 115505767 A CN115505767 A CN 115505767A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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Abstract
The invention relates to a method for manufacturing a high-plasticity BFe10-1-1 white copper pipe, which comprises the following steps: casting to obtain a solid cupronickel ingot blank with the material of BFe10-1-1, cutting and extruding to obtain a hollow cupronickel ingot blank, cold rolling and annealing, peeling, cold drawing and straightening, and annealing. The manufacturing method of the high-plasticity BFe10-1-1 cupronickel tube has the advantages of high production efficiency, elongation rate of more than 50 percent and high plasticity; through scientific design of alloy elements and impurity elements, the yield ratio is greatly reduced, and the plasticity is obviously improved; the cold rolling with large deformation and the high-temperature short-time annealing are combined into small-deformation cold drawing and high-temperature short-time annealing of a product, a special crystal boundary structure is controlled, the strength is improved, the plasticity is increased, and meanwhile, the production efficiency is improved; through the processes of straightening, annealing of finished products and slow cooling annealing, deformation stress and thermal stress are reduced, yield strength is reduced, and plasticity is improved.
Description
Technical Field
The invention belongs to the technical field of manufacturing of cupronickel alloy tubes, and particularly relates to a manufacturing method of a high-plasticity BFe10-1-1 cupronickel tube.
Background
The copper-nickel alloy white copper tube is used as a main variety of a condenser tube for ocean engineering, and is widely applied to a plurality of fields such as seawater desalination, ocean oil production platforms, seawater power generation, ocean vessels and the like. With the development of national defense war industry and ships in China, the demand of the copper-nickel alloy cupronickel pipe with high plasticity, high strength and corrosion resistance is increasingly strong; particularly, the copper-nickel alloy white copper pipe with high plasticity has lower residual stress and improved corrosion performance, and meanwhile, the high plasticity can be subjected to large deformation to meet higher equipment manufacturing requirements.
At present, the room-temperature tensile property of the BFe10-1-1 white copper pipe is that the elongation rate is hardly over 45% on the premise that the tensile strength meets the national standard GB/T8890.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method for manufacturing a BFe10-1-1 cupronickel tube with high elongation of more than 50% and high plasticity.
According to the technical scheme provided by the invention, the manufacturing method of the high-plasticity BFe10-1-1 white copper pipe comprises the following steps:
s1, obtaining a solid cupronickel ingot blank with BFe10-1-1 by fusion casting, wherein in the cupronickel solid ingot blank, the content of Ni and Co is 10.50-10.90 wt%, the content of Mn is 0.55-0.65 wt%, the content of Fe is 1.05-1.15 wt%, the content of C is not more than 0.008wt%, the content of Pb is not more than 0.006wt%, the content of P is not more than 0.004wt%, the content of S is not more than 0.005wt%, the content of Si is not more than 0.08wt%, the content of Sn is not more than 0.003wt%, the content of Zn is not more than 0.03wt%, the total content of unavoidable impurities is not more than 0.35wt%, and the balance is Cu;
s2, cutting the solid cupronickel ingot blank obtained in the step S1, and extruding the solid cupronickel ingot blank into a hollow cupronickel ingot blank;
s3, cold rolling and annealing the hollow cupronickel ingot blank obtained in the step S2 to obtain a tube blank, annealing once after each rolling, wherein the elongation coefficient of each cold rolling is controlled to be 8-9.5, the annealing temperature is controlled to be 715-725 ℃ each time, and the annealing time is controlled to be 20-30 min each time;
s4, peeling the tube blank obtained in the step S3;
s5, cold-drawing the tube blank which is scalped in the step S4, controlling the elongation coefficient of the cold-drawing to be 1.15-1.25, and straightening after the cold-drawing;
and S6, annealing the tube blank obtained in the step S5, controlling the annealing temperature at 715-725 ℃ and the annealing time at 15-25 min, cooling to 300-400 ℃ at the cooling range of 15-30 ℃/min, discharging, air cooling, and finishing the air cooling to obtain the high-plasticity BFe10-1-1 white copper tube finished product.
Preferably, in the cupronickel solid ingot blank in the step S1, the Ni + Co content is 10.726 to 10.889wt%, the Mn content is 0.5537 to 0.6132wt%, and the Fe content is 1.07 to 1.13wt%.
The invention has the following advantages:
(1) The manufacturing method of the high-plasticity BFe10-1-1 cupronickel tube has high production efficiency, the elongation rate is over 50 percent and the plasticity is high while the product strength meets the national standard GB/T8890. The method solves the problem that the ppm-level ultralow-S BFe10-1-1 alloy pipe can be prepared only by special smelting equipment and process to improve the plasticity, and has general feasibility and universality.
(2) Through scientific design and control of alloy elements and impurity elements, the yield ratio is greatly reduced, and the plasticity is obviously improved.
(3) The method combines the large-deformation cold rolling and the high-temperature short-time annealing into a product of small-deformation cold drawing and high-temperature short-time annealing, controls a special crystal boundary structure, improves the strength, increases the plasticity and improves the production efficiency.
(4) The method reduces the deformation stress and the thermal stress, reduces the yield strength and improves the plasticity by firstly straightening, then annealing the finished product and slowly cooling the annealing process.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The manufacturing method of the high-plasticity BFe10-1-1 cupronickel tube comprises the following steps:
s1, obtaining a solid cupronickel ingot blank which is BFe10-1-1 and has the diameter of phi 180 through fusion casting, wherein the solid cupronickel ingot blank contains 10.889wt% of Ni and Co, 0.5537wt% of Mn, 1.07wt% of Fe, 0.0052wt% of C, 0.0054wt% of Pb, 0.0032 wt% of P, 0.0039wt% of S, 0.0205wt% of Si, 0.0021wt% of Sn, 0.019wt% of Zn, 0.12wt% of the total content of unavoidable impurities and the balance of Cu;
s2, cutting the solid cupronickel ingot blank obtained in the step S1, and extruding the solid cupronickel ingot blank into a hollow cupronickel ingot blank with phi of 84 multiplied by 11 mm;
s3, carrying out cold rolling for 2 times and annealing for 2 times on the hollow cupronickel ingot blank obtained in the step S2, carrying out first cold rolling to phi 45 multiplied by 2.3mm, and then carrying out first annealing, wherein the first annealing temperature is controlled at 715 ℃, and the first annealing time is controlled at 20min; then carrying out second cold rolling to phi 12 multiplied by 1.0mm, and then carrying out second annealing, wherein the second annealing temperature is controlled at 715 ℃ and the second annealing time is 20min, so as to obtain a tube blank;
s4, peeling the tube blank obtained in the step S3 to phi 11.8 multiplied by 0.8mm;
s5, cold-drawing the finished pipe blank obtained in the step S4 to phi 11 multiplied by 0.7mm, and then straightening;
and S6, annealing the tube blank obtained in the step S5 at 715 ℃ for 15min, cooling to 300 ℃ at the temperature of 15 ℃/min, discharging for air cooling, and finishing the air cooling to obtain the high-plasticity BFe10-1-1 cupronickel tube finished product.
Randomly taking 5 tubes from the finished tube obtained in the step S6, taking 1 sample from each tube, and performing a room temperature tensile test according to GB/T228.1-2021, wherein specific results are shown in Table 1.
TABLE 1
The BFe10-1-1 cupronickel alloy pipes manufactured by the embodiments have the elongation rate of over 50 percent and high plasticity.
Example 2
The manufacturing method of the high-plasticity BFe10-1-1 cupronickel tube comprises the following steps:
s1, obtaining a solid white copper ingot blank with the material BFe10-1-1 and the diameter phi of 180 through fusion casting, wherein in the solid white copper ingot blank, the Ni + Co content is 10.726wt%, the Mn content is 0.6132wt%, the Fe content is 1.13wt%, the C content is 0.0046wt%, the Pb content is 0.0049wt%, the P content is 0.0031wt%, the S content is 0.0036wt%, the Si content is 0.0112wt%, the Sn content is 0.0027wt%, the Zn content is 0.022wt%, the total content of unavoidable impurities is 0.15wt%, and the balance is Cu;
s2, cutting the solid cupronickel ingot blank obtained in the step S1, and extruding to form a hollow cupronickel ingot blank with the diameter of 84 x 13 mm;
s3, carrying out cold rolling for 2 times and annealing for 2 times on the hollow cupronickel ingot blank obtained in the step S2, carrying out first cold rolling to phi 48 multiplied by 2.5mm, then carrying out first annealing, controlling the first annealing temperature at 715 ℃, controlling the first annealing time at 30min, then carrying out second cold rolling, carrying out second cold rolling to phi 12 multiplied by 1.2mm, then carrying out second annealing, controlling the second annealing temperature at 725 ℃, controlling the second annealing time at 30min, and obtaining a tube blank;
s4, peeling the tube blank obtained in the step S3 to phi 11.8 multiplied by 1.1mm;
s5, cold-drawing the tube blank obtained in the step S4 to phi 11 multiplied by 1mm, and then straightening;
and S6, annealing the tube blank obtained in the step S5, controlling the annealing temperature at 725 ℃ and the annealing time at 25min, cooling to 400 ℃ at the temperature reduction range of 30 ℃/min, discharging for air cooling, and finishing the air cooling to obtain the finished product of the high-plasticity BFe10-1-1 cupronickel tube.
Randomly taking 5 pipes from the finished pipe obtained in the step S6, taking 1 sample from each pipe, and carrying out a room temperature tensile test according to GB/T228.1-2021, wherein the specific results are shown in Table 2.
TABLE 2
The BFe10-1-1 cupronickel alloy tubes manufactured in example 2 all had elongation exceeding 50% and high plasticity.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modifications, alterations and equivalent changes of the above embodiments according to the principles of the present invention are within the protection scope of the technical solution of the present invention.
Claims (2)
1. A manufacturing method of a high-plasticity BFe10-1-1 white copper pipe is characterized by comprising the following steps:
s1, obtaining a solid cupronickel ingot blank with a BFe material of 10-1-1 by casting, wherein in the cupronickel solid ingot blank, the content of Ni and Co is 10.50-10.90 wt%, the content of Mn is 0.55-0.65 wt%, the content of Fe is 1.05-1.15 wt%, the content of C is not more than 0.008wt%, the content of Pb is not more than 0.006wt%, the content of P is not more than 0.004wt%, the content of S is not more than 0.005wt%, the content of Si is not more than 0.08wt%, the content of Sn is not more than 0.003wt%, the content of Zn is not more than 0.03wt%, the total content of unavoidable impurities is not more than 0.35wt%, and the balance is Cu;
s2, cutting the solid cupronickel ingot blank obtained in the step S1, and extruding to form a hollow cupronickel ingot blank;
s3, cold rolling and annealing the hollow cupronickel ingot blank obtained in the step S2 to obtain a tube blank, annealing once after each rolling, wherein the elongation coefficient of each cold rolling is controlled to be 8 to 9.5, the annealing temperature is controlled to be 715 to 725 ℃ each time, and the annealing time is controlled to be 20 to 30min each time;
s4, peeling the tube blank obtained in the step S3;
s5, cold-drawing the tube blank which is peeled in the step S4, controlling the elongation coefficient of the cold-drawing to be 1.15 to 1.25, and straightening after the cold-drawing;
and S6, annealing the tube blank obtained in the step S5, controlling the annealing temperature to be 715-725 ℃ and the annealing time to be 15-25min, cooling to be 300-400 ℃ at the cooling range of 15-30 ℃/min, discharging, air cooling, and finishing the air cooling to obtain the finished product of the high-plasticity BFe10-1-1 cupronickel tube.
2. The method for manufacturing the high-plasticity BFe10-1-1 cupronickel tube as set forth in claim 1, wherein the method comprises the following steps: in the cupronickel solid ingot blank in the step S1, the content of Ni and Co is 10.726 to 10.889wt%, the content of Mn is 0.5537 to 0.6132wt%, and the content of Fe is 1.07 to 1.13wt%.
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| CN202211179713.XA CN115505767A (en) | 2022-09-27 | 2022-09-27 | Manufacturing method of high-plasticity BFe10-1-1 white copper pipe |
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Citations (9)
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|---|---|---|---|---|
| JP2011012299A (en) * | 2009-07-01 | 2011-01-20 | Sumitomo Light Metal Ind Ltd | Method for producing inner grooved tube |
| CN102899595A (en) * | 2012-09-05 | 2013-01-30 | 苏州富瑞铜合金科技有限公司 | Copper-nickel alloy tube preparation method |
| JP2013040397A (en) * | 2011-08-12 | 2013-02-28 | Poongsan Corp | Copper alloy material for pipe having high strength and high conductivity and method for manufacturing the same |
| CN103789570A (en) * | 2012-10-29 | 2014-05-14 | 宁波金田铜业(集团)股份有限公司 | High-strength heat-resisting micro-alloyed copper pipe and preparation method thereof |
| CN104451251A (en) * | 2014-11-18 | 2015-03-25 | 北京科技大学 | High-iron cupronickel alloy pipe and short-process production method thereof |
| CN106011530A (en) * | 2016-06-07 | 2016-10-12 | 浙江三瑞铜业有限公司 | Production process for cupronickel material |
| CN108677059A (en) * | 2018-05-28 | 2018-10-19 | 中色奥博特铜铝业有限公司 | Cu-15Ni-8Sn copper alloys, Copper alloy bar and preparation method thereof |
| CN112296617A (en) * | 2020-10-14 | 2021-02-02 | 江苏隆达超合金股份有限公司 | Production method of high-fin cupronickel alloy high-efficiency tube |
| CN112296122A (en) * | 2020-10-14 | 2021-02-02 | 江苏隆达超合金股份有限公司 | Manufacturing process of high-efficiency tube made of high-fin cupronickel alloy |
-
2022
- 2022-09-27 CN CN202211179713.XA patent/CN115505767A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011012299A (en) * | 2009-07-01 | 2011-01-20 | Sumitomo Light Metal Ind Ltd | Method for producing inner grooved tube |
| JP2013040397A (en) * | 2011-08-12 | 2013-02-28 | Poongsan Corp | Copper alloy material for pipe having high strength and high conductivity and method for manufacturing the same |
| CN102899595A (en) * | 2012-09-05 | 2013-01-30 | 苏州富瑞铜合金科技有限公司 | Copper-nickel alloy tube preparation method |
| CN103789570A (en) * | 2012-10-29 | 2014-05-14 | 宁波金田铜业(集团)股份有限公司 | High-strength heat-resisting micro-alloyed copper pipe and preparation method thereof |
| CN104451251A (en) * | 2014-11-18 | 2015-03-25 | 北京科技大学 | High-iron cupronickel alloy pipe and short-process production method thereof |
| CN106011530A (en) * | 2016-06-07 | 2016-10-12 | 浙江三瑞铜业有限公司 | Production process for cupronickel material |
| CN108677059A (en) * | 2018-05-28 | 2018-10-19 | 中色奥博特铜铝业有限公司 | Cu-15Ni-8Sn copper alloys, Copper alloy bar and preparation method thereof |
| CN112296617A (en) * | 2020-10-14 | 2021-02-02 | 江苏隆达超合金股份有限公司 | Production method of high-fin cupronickel alloy high-efficiency tube |
| CN112296122A (en) * | 2020-10-14 | 2021-02-02 | 江苏隆达超合金股份有限公司 | Manufacturing process of high-efficiency tube made of high-fin cupronickel alloy |
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