CN109735739B - Material for shielding sheet, preparation method of material and shielding sheet - Google Patents
Material for shielding sheet, preparation method of material and shielding sheet Download PDFInfo
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Abstract
The invention relates to the technical field of shielding sheets, in particular to a material for a shielding sheet, a preparation method of the material and the shielding sheet. A material for a shielding sheet comprises the following elements in percentage by mass: 0.1 to 0.2 percent of phosphorus, 1 to 1.6 percent of iron, 4.0 to 5.0 percent of tin, 0.3 to 0.5 percent of aluminum, 0.1 to 0.15 percent of silicon, 0.02 to 0.03 percent of antimony, 0.02 to 0.03 percent of bismuth, 2 to 4 percent of magnesium, 0.4 to 0.6 percent of manganese, 0.5 to 0.8 percent of nickel, 4.0 to 5.0 percent of zinc, 0.4 to 0.7 percent of zirconium, and the balance of copper and inevitable impurity elements. The prepared material for the shielding sheet has excellent mechanical property, corrosion resistance and electromagnetic shielding efficiency, provides a good material for manufacturing the shielding sheet with excellent performance, has a simple and efficient preparation method, is easy to control the operation process, is beneficial to industrial production, and has stable product quality.
Description
Technical Field
The invention relates to the technical field of shielding sheets, in particular to a material for a shielding sheet and a preparation method thereof.
Background
With the development of science and technology and the advancement of society, electronic products have played an important role in industrial production and daily life of people. However, in the use process of electronic products, the generated electromagnetic waves radiate electromagnetic energy to the outside, which seriously affects the stable operation of precision instruments and brings adverse effects to human health. The most effective way to reduce electromagnetic radiation is to shield the electromagnetic waves. At present, as an important electronic component, an electrical connector has been widely used in the fields of aerospace, ships, detection equipment, and the like, and a shielding sheet is generally used to shield electromagnetic waves. However, the existing shielding sheet often has problems of unsatisfactory mechanical performance and electromagnetic shielding performance, which affects the reliability and service life thereof. Therefore, the material for the shielding sheet with excellent mechanical performance and high electromagnetic shielding performance is manufactured, and has very important significance for improving the safety and reliability and prolonging the service life of the shielding sheet.
Disclosure of Invention
The invention aims to provide a material for a shielding sheet with excellent mechanical property and high electromagnetic shielding property, aiming at the defects in the prior art, and the shielding sheet prepared from the material has excellent use safety and reliability and long service life.
The invention also aims to provide a preparation method of the material for the shielding sheet, which is simple and efficient, has easily controlled operation process, is beneficial to industrial production, and ensures that the prepared product has stable quality.
The purpose of the invention is realized by the following technical scheme:
a material for a shielding sheet comprises the following elements in percentage by mass: 0.1 to 0.2 percent of phosphorus, 1 to 1.6 percent of iron, 4.0 to 5.0 percent of tin, 0.3 to 0.5 percent of aluminum, 0.1 to 0.15 percent of silicon, 0.02 to 0.03 percent of antimony, 0.02 to 0.03 percent of bismuth, 2 to 4 percent of magnesium, 0.4 to 0.6 percent of manganese, 0.5 to 0.8 percent of nickel, 4.0 to 5.0 percent of zinc, 0.4 to 0.7 percent of zirconium, and the balance of copper and inevitable impurity elements.
Further, the mass percentage of the inevitable impurity element is not more than 0.1%. By strictly controlling the amount of impurities, excessive impurities are prevented from affecting the mechanical properties, processability and corrosion resistance of the material for a shield sheet.
Copper is used as a base material, and elements such as phosphorus, iron, tin, aluminum, silicon, antimony, bismuth, magnesium, manganese, nickel, zinc and the like are added and matched, so that the growth of crystal grains is inhibited, and the stress relaxation resistance and the fatigue resistance of the material are improved; the prepared material for the copper alloy shielding sheet has excellent mechanical property, corrosion resistance and low magnetic permeability, has the magnetic resisting effect of copper shielding and the magnetic gathering effect of magnetic shielding, greatly enhances the shielding effect compared with the material for the shielding sheet which only adopts copper shielding or magnetic shielding, and improves the electromagnetic shielding efficiency of the material for the shielding sheet.
According to the invention, by adding tin and strictly controlling the content of tin, the mechanical strength, corrosion resistance and wear resistance of the copper alloy material are improved, and the casting of the copper alloy is facilitated; the addition of phosphorus can improve the fluidity of the melt and improve the fatigue strength and the corrosion resistance of the copper alloy; the aluminum and the zinc are matched with each other to form a continuous solid solution in a copper alloy system, so that the mechanical strength of the copper alloy material is improved, and the alloy cost is reduced; the nickel and the beryllium are matched with each other, so that the corrosion resistance, the elasticity, the yield limit and the fatigue limit of the copper alloy are improved; by adding zirconium element, the copper alloy crystal grains can be further refined, the plasticity effect of the copper-phosphorus alloy part is improved, and the processing performance of the copper-phosphorus alloy part is improved. Manganese and copper can form a copper-manganese solid solution, the high plasticity, high elongation, excellent cold processing performance and the like of copper are reserved, and the iron element can increase the number of nucleation in the casting process, hinder the growth of crystal grains and play a role in refining the crystal grains.
The material for the copper alloy shielding sheet can be used for subsequent punch forming, and provides a good material for manufacturing the shielding sheet with excellent performance.
The other purpose of the invention is realized by the following technical scheme:
the preparation method of the material for the shielding sheet comprises the following steps:
(1) weighing copper ingots according to the formula ratio, putting the copper ingots into a smelting furnace, heating to 1100-1250 ℃, adding a copper-phosphorus intermediate alloy, stirring and preserving heat for 15-20 min;
(2) heating the temperature of the smelting furnace to 1500-;
(3) adding beryllium, aluminum, silicon, antimony, bismuth, magnesium, manganese, nickel, zinc and zirconium according to the formula amount, adjusting the temperature of a smelting furnace to 1450-1500 ℃, stirring and preserving heat for 15-20min to obtain an alloy melt;
(4) preparing a blank material from the alloy melt by adopting a semi-continuous ingot casting method;
(5) carrying out hot rolling on the blank material prepared in the step (4); then, carrying out surface milling, cold rolling and finish rolling on the strip obtained after hot rolling;
(6) and (3) recrystallizing the strip after the finish rolling, carrying out primary annealing, finish rolling and secondary annealing, keeping the temperature for 3-4h, and cleaning to obtain the material for the shielding sheet.
Further, in the step (1), the mass percent of phosphorus in the copper-phosphorus intermediate alloy is 12-16%.
Further, in the step (2), the preparation method of the nickel in the molten state comprises: heating the nickel to 1450-1500 ℃ according to the formula amount, stirring and preserving heat for 10-15min to prepare the molten nickel.
Further, in the step (4), the pouring temperature is 1000-
Further, in the step (5), the hot rolling temperature is 740-780 ℃ and the hot rolling speed is 2-3 m/s.
Further, in the step (5), the finish rolling processing rate is 70-80%; in the step (6), the finish rolling has a reduction ratio of 70 to 80%.
Further, in the step (6), the temperature for recrystallization is 400-500 ℃, and the temperature for primary annealing is 250-300 ℃. The temperature of the secondary annealing is 200-240 ℃.
Furthermore, the invention also provides a shielding sheet which is made of the material for the shielding sheet. Further, the shielding sheet is made of a material for the shielding sheet through punch forming.
The preparation method is simple and efficient, the prepared blank contains fine and uniform isometric crystals and has small defects, and after hot rolling, cold rolling and finish rolling are carried out, and the strip after finish rolling is recrystallized, annealed for the first time, finish rolling and annealed for the second time, the rolling pass in the prior art is reduced, the production cost is reduced, and meanwhile, the plasticity and the strength of the material for the shielding sheet are improved, so that the material has compact structure, high concentration, excellent processing performance and good tensile strength and compressive strength. The invention has the beneficial effects that: the material for the shielding sheet disclosed by the invention takes copper as a base material, and is matched with elements such as phosphorus, iron, tin, aluminum, silicon, antimony, bismuth, zirconium and the like, so that the prepared material for the shielding sheet has excellent mechanical properties, corrosion resistance and electromagnetic shielding effectiveness, can be used for subsequent stamping forming, and provides a good material for manufacturing the shielding sheet with excellent properties.
The preparation method of the material for the shielding sheet is simple and efficient, the operation process is easy to control, the industrial production is facilitated, and the product quality is stable.
Detailed Description
The invention is further described with reference to the following examples.
Example 1
A material for a shielding sheet comprises the following elements in percentage by mass: 0.15% of phosphorus, 1.2% of iron, 4.5% of tin, 0.4% of aluminum, 0.1-0.15% of silicon, 0.025% of antimony, 0.025% of bismuth, 3% of magnesium, 0.5% of manganese, 0.6% of nickel, 45% of zinc, 0.6% of zirconium, and the balance of copper and inevitable impurity elements.
Further, the mass percentage of the inevitable impurity element is not more than 0.1%.
The preparation method of the material for the shielding sheet comprises the following steps:
(1) weighing copper ingots according to the formula ratio, putting the copper ingots into a smelting furnace, heating to 1200 ℃, adding a copper-phosphorus intermediate alloy, stirring and keeping the temperature for 20 min;
(2) heating the temperature of the smelting furnace to 1550 ℃, adding molten nickel, stirring and keeping the temperature for 20 min;
(3) adding beryllium, aluminum, silicon, antimony, bismuth, magnesium, manganese, nickel, zinc and zirconium according to the formula amount, adjusting the temperature of a smelting furnace to 1500 ℃, stirring and preserving heat for 20min to obtain an alloy melt;
(4) preparing a blank material from the alloy melt by adopting a semi-continuous ingot casting method;
(5) carrying out hot rolling on the blank material prepared in the step (4); then, carrying out surface milling, cold rolling and finish rolling on the strip obtained after hot rolling;
(6) and (4) recrystallizing the strip after the finish rolling, carrying out primary annealing, finish rolling and secondary annealing, keeping the temperature for 4 hours, and cleaning to obtain the material for the shielding sheet.
Further, in the step (1), the mass percentage of phosphorus in the copper-phosphorus intermediate alloy is 15%.
Further, in the step (2), the preparation method of the nickel in the molten state comprises: heating nickel to 1480 ℃ according to the formula amount, stirring and keeping the temperature for 12min to prepare molten nickel.
Further, in the step (4), the pouring temperature is 1050 ℃, and the ingot pulling speed is 80mm/min
Further, in the step (5), the hot rolling temperature is 760 ℃ and the hot rolling speed is 2.5 m/s.
Further, in the step (5), the finish rolling reduction rate is 75%; in the step (6), the finish rolling has a reduction ratio of 75%.
Further, in the step (6), the temperature of recrystallization is 450 ℃, and the temperature of primary annealing is 280 ℃. The temperature of the secondary annealing is 220 DEG C
Further, the present embodiment also provides a shielding sheet, which is made of the material for shielding sheet. Further, the shielding sheet is made of a material for the shielding sheet through punch forming. Example 2
A material for a shielding sheet comprises the following elements in percentage by mass: 0.1% of phosphorus, 1.6% of iron, 4.0% of tin, 0.5% of aluminum, 0.1% of silicon, 0.03% of antimony, 0.02% of bismuth, 4% of magnesium, 0.4% of manganese, 0.8% of nickel, 4.0% of zinc, 0.7% of zirconium, and the balance of copper and inevitable impurity elements.
Further, the mass percentage of the inevitable impurity element is not more than 0.1%.
The preparation method of the material for the shielding sheet comprises the following steps:
(1) weighing copper ingots according to the formula ratio, putting the copper ingots into a smelting furnace, heating to 1100 ℃, adding a copper-phosphorus intermediate alloy, stirring and keeping the temperature for 20 min;
(2) heating the temperature of the smelting furnace to 1500 ℃, adding molten nickel, stirring and preserving heat for 20 min;
(3) adding beryllium, aluminum, silicon, antimony, bismuth, magnesium, manganese, nickel, zinc and zirconium according to the formula amount, adjusting the temperature of a smelting furnace to 1450 ℃, stirring and preserving heat for 20min to obtain an alloy melt;
(4) preparing a blank material from the alloy melt by adopting a semi-continuous ingot casting method;
(5) carrying out hot rolling on the blank material prepared in the step (4); then, carrying out surface milling, cold rolling and finish rolling on the strip obtained after hot rolling;
(6) and (3) recrystallizing the strip after the finish rolling, carrying out primary annealing, finish rolling and secondary annealing, keeping the temperature for 3-4h, and cleaning to obtain the material for the shielding sheet.
Further, in the step (1), the mass percentage of phosphorus in the copper-phosphorus intermediate alloy is 12%.
Further, in the step (2), the preparation method of the nickel in the molten state comprises: heating nickel to 1450 deg.C, stirring and keeping the temperature for 10min to obtain molten nickel.
Further, in the step (4), the pouring temperature is 1000 ℃, and the ingot pulling speed is 50mm/min
Further, in the step (5), the hot rolling temperature is 740 ℃ and the hot rolling speed is 2 m/s.
Further, in the step (5), the finish rolling processing rate is 70%; in the step (6), the finish rolling has a reduction ratio of 70.
Further, in the step (6), the temperature of recrystallization is 400 ℃, and the temperature of primary annealing is 250 ℃. The temperature of the secondary annealing is 200 DEG C
Further, the embodiment also provides a shielding sheet, which is made of the material for the shielding sheet. Further, the shielding sheet is made of a material for the shielding sheet through punch forming.
Example 3
A material for a shielding sheet comprises the following elements in percentage by mass: 0.2% of phosphorus, 1% of iron, 5.0% of tin, 0.3% of aluminum, 0.15% of silicon, 0.02% of antimony, 0.03% of bismuth, 2% of magnesium, 0.6% of manganese, 0.58% of nickel, 5.0% of zinc, 0.4% of zirconium, and the balance of copper and inevitable impurity elements.
The preparation method of the material for the shielding sheet comprises the following steps:
(1) weighing copper ingots according to the formula ratio, putting the copper ingots into a smelting furnace, heating to 1250 ℃, adding a copper-phosphorus intermediate alloy, stirring and keeping the temperature for 15 min;
(2) heating the temperature of the smelting furnace to 1550 ℃, adding molten nickel, stirring and keeping the temperature for 15 min;
(3) adding beryllium, aluminum, silicon, antimony, bismuth, magnesium, manganese, nickel, zinc and zirconium according to the formula amount, adjusting the temperature of a smelting furnace to 1500 ℃, stirring and preserving heat for 15min to obtain an alloy melt;
(4) preparing a blank material from the alloy melt by adopting a semi-continuous ingot casting method;
(5) carrying out hot rolling on the blank material prepared in the step (4); then, carrying out surface milling, cold rolling and finish rolling on the strip obtained after hot rolling;
(6) and (3) recrystallizing the strip after the finish rolling, carrying out primary annealing, finish rolling and secondary annealing, keeping the temperature for 3-4h, and cleaning to obtain the material for the shielding sheet.
Further, in the step (1), the mass percentage of phosphorus in the copper-phosphorus intermediate alloy is 16%.
Further, in the step (2), the preparation method of the nickel in the molten state comprises: heating the nickel to 1500 ℃ according to the formula amount, stirring and preserving heat for 10min to prepare molten nickel.
Further, in the step (4), the pouring temperature is 1100 ℃, and the ingot pulling speed is 90mm/min
Further, in the step (5), the hot rolling temperature is 780 ℃ and the hot rolling speed is 3 m/s.
Further, in the step (5), the finish rolling processing rate is 80%; in the step (6), the finish rolling has a reduction ratio of 80%.
Further, in the step (6), the temperature of recrystallization is 500 ℃, and the temperature of primary annealing is 300 ℃. The temperature of the secondary annealing is 240 DEG C
The rest of this embodiment is the same as embodiment 1, and is not described herein again. Example 4
A material for a shielding sheet comprises the following elements in percentage by mass: 0.18% of phosphorus, 1.4% of iron, 4.2% of tin, 0.4% of aluminum, 0.1% of silicon, 0.02% of antimony, 0.0253% of bismuth, 2.5% of magnesium, 0.5% of manganese, 0.6% of nickel, 4.0-5.0% of zinc, 0.6% of zirconium, and the balance of copper and inevitable impurity elements.
Further, the mass percentage of the inevitable impurity element is not more than 0.1%.
The preparation method of the material for the shielding sheet is characterized by comprising the following steps of: the method comprises the following steps:
(1) weighing copper ingots according to the formula ratio, putting the copper ingots into a smelting furnace, heating to 1150 ℃, adding a copper-phosphorus intermediate alloy, stirring and keeping the temperature for 18 min;
(2) heating the temperature of the smelting furnace to 1520 ℃, adding molten nickel, stirring and preserving heat for 18 min;
(3) adding beryllium, aluminum, silicon, antimony, bismuth, magnesium, manganese, nickel, zinc and zirconium according to the formula amount, adjusting the temperature of a smelting furnace to 1480 ℃, stirring and preserving heat for 18min to obtain an alloy melt;
(4) preparing a blank material from the alloy melt by adopting a semi-continuous ingot casting method;
(5) carrying out hot rolling on the blank material prepared in the step (4); then, carrying out surface milling, cold rolling and finish rolling on the strip obtained after hot rolling;
(6) and (4) recrystallizing the strip after the finish rolling, carrying out primary annealing, finish rolling and secondary annealing, keeping the temperature for 3.5 hours, and then cleaning to obtain the material for the shielding sheet.
Further, in the step (1), the mass percentage of phosphorus in the copper-phosphorus intermediate alloy is 136%.
Further, in the step (2), the preparation method of the nickel in the molten state comprises: heating nickel to 1480 ℃ according to the formula amount, stirring and keeping the temperature for 14min to prepare molten nickel.
Further, in the step (4), the pouring temperature is 1050 ℃, and the ingot pulling speed is 60mm/min
Further, in the step (5), the hot rolling temperature is 760 ℃ and the hot rolling speed is 2 m/s.
Further, in the step (5), the finish rolling processing rate is 80%; in the step (6), the finish rolling has a reduction ratio of 70%.
Further, in the step (6), the temperature of recrystallization is 480 ℃ and the temperature of primary annealing is 260 ℃. The temperature of the secondary annealing is 210 DEG C
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Example 5
A material for a shielding sheet comprises the following elements in percentage by mass: 0.12% of phosphorus, 1.5% of iron, 4.8% of tin, 0.35% of aluminum, 0.12% of silicon, 0.022% of antimony, 0.024% of bismuth, 2.8% of magnesium, 0.45% of manganese, 0.7% of nickel, 4.4% of zinc, 0.4-0.7% of zirconium, and the balance of copper and inevitable impurity elements.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
The materials for the shield sheets of examples 1 to 5 were prepared into plates having a thickness of 10mm, and the results of the performance tests of examples 1 to 5 of the present invention are shown in the following table:
the material for the shielding sheet prepared by the invention has good shielding efficiency and good mechanical properties such as compressive strength, tensile strength and bending property. The preparation method is simple and efficient, the operation process is easy to control, the industrial production is facilitated, the product quality is stable, the method can be used for subsequent punch forming, good materials can be provided for manufacturing the shielding sheet with high quality and good shielding effectiveness, and the manufactured shielding sheet is safe and reliable to use and long in service life.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A material for a shield sheet, characterized in that: the alloy comprises the following elements in percentage by mass: 0.1-0.2% of phosphorus, 1-1.6% of iron, 4.0-5.0% of tin, 0.3-0.5% of aluminum, 0.1-0.15% of silicon, 0.02-0.03% of antimony, 0.02-0.03% of bismuth, 2-4% of magnesium, 0.4-0.6% of manganese, 0.5-0.8% of nickel, 4.0-5.0% of zinc, 0.4-0.7% of zirconium, 0.04-0.08% of beryllium and the balance of copper and inevitable impurity elements; the mass percentage of the inevitable impurity elements is not more than 0.1%.
2. A method for producing a material for a shield sheet according to claim 1, characterized in that: the method comprises the following steps:
(1) weighing copper ingots according to the formula ratio, putting the copper ingots into a smelting furnace, heating to 1100-1250 ℃, adding a copper-phosphorus intermediate alloy, stirring and preserving heat for 15-20 min;
(2) heating the temperature of the smelting furnace to 1500-;
(3) adding beryllium, aluminum, silicon, antimony, bismuth, magnesium, manganese, zinc and zirconium according to the formula amount, adjusting the temperature of a smelting furnace to 1450-1500 ℃, stirring and preserving heat for 15-20min to obtain an alloy melt;
(4) preparing a blank material from the alloy melt by adopting a semi-continuous ingot casting method;
(5) carrying out hot rolling on the blank material prepared in the step (4); then, carrying out surface milling, cold rolling and finish rolling on the strip obtained after hot rolling;
(6) and (3) recrystallizing the strip after the finish rolling, carrying out primary annealing, finish rolling and secondary annealing, keeping the temperature for 3-4h, and cleaning to obtain the material for the shielding sheet.
3. The method for producing a material for a shield sheet according to claim 2, characterized in that: in the step (1), the mass percent of phosphorus in the copper-phosphorus master alloy is 12-16%.
4. The method for producing a material for a shield sheet according to claim 2, characterized in that: in the step (2), the preparation method of the molten nickel comprises the following steps: heating the nickel to 1450-1500 ℃ according to the formula amount, stirring and preserving heat for 10-15min to prepare the molten nickel.
5. The method for producing a material for a shield sheet according to claim 2, characterized in that: in the step (4), the pouring temperature is 1000-1100 ℃, and the ingot pulling speed is 50-90 mm/min.
6. The method for producing a material for a shield sheet according to claim 2, characterized in that: in the step (5), the hot rolling temperature is 740-780 ℃, and the hot rolling speed is 2-3 m/s.
7. The method for producing a material for a shield sheet according to claim 2, characterized in that: in the step (5), the finish rolling machining rate is 70-80%; in the step (6), the finish rolling has a reduction ratio of 70 to 80%.
8. The method for producing a material for a shield sheet according to claim 2, characterized in that: in the step (6), the temperature of recrystallization is 400-500 ℃, and the temperature of primary annealing is 250-300 ℃.
9. A shield sheet characterized in that: the material for a shield sheet according to claim 1.
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| CN107828984A (en) * | 2013-09-20 | 2018-03-23 | Ｊｘ金属株式会社 | Copper alloy foil |
| CN108384986A (en) * | 2018-05-07 | 2018-08-10 | 宁波博威合金材料股份有限公司 | A kind of Cu alloy material and its application |
| CN108950295A (en) * | 2018-07-31 | 2018-12-07 | 合肥华盖光伏科技有限公司 | A kind of shield type copper alloy wire and its application |
| CN109338151A (en) * | 2018-12-14 | 2019-02-15 | 宁波博威合金材料股份有限公司 | A kind of electronic electric equipment copper alloy and purposes |
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| JP4503696B2 (en) * | 2009-10-28 | 2010-07-14 | 株式会社神戸製鋼所 | Electronic parts made of copper alloy sheets with excellent bending workability |
| JP5785836B2 (en) * | 2011-09-20 | 2015-09-30 | 三菱マテリアル株式会社 | Copper alloys and castings |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107828984A (en) * | 2013-09-20 | 2018-03-23 | Ｊｘ金属株式会社 | Copper alloy foil |
| CN108384986A (en) * | 2018-05-07 | 2018-08-10 | 宁波博威合金材料股份有限公司 | A kind of Cu alloy material and its application |
| CN108950295A (en) * | 2018-07-31 | 2018-12-07 | 合肥华盖光伏科技有限公司 | A kind of shield type copper alloy wire and its application |
| CN109338151A (en) * | 2018-12-14 | 2019-02-15 | 宁波博威合金材料股份有限公司 | A kind of electronic electric equipment copper alloy and purposes |
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