QSi3-1 silicon bronze plate strip and preparation method thereof
By using specific ratio mixing of Si, Mn, Fe, Cu, covering agent and multi-pass rolling processes in the preparation process of QSi3-1 silicon bronze plate and strip, the problems of impurity defects and electrical performance in the strip are solved, and high-quality and excellent performance silicon bronze plate and strip are achieved.
Patent Information
- Application Number
- CN202411547444.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-03-04
AI Technical Summary
The existing QSi3-1 silicon bronze plate and strip have high impurity defect levels, poor plasticity, and unstable electrical performance, which limits its application in the smart electrical industry.
Si, Mn, Fe, and Cu are mixed in a certain proportion, and then smelted casting and forging are carried out by covering the agent, followed by hot rolling, rough rolling, solid solution heat treatment and annealing treatment to reduce impurity defects and improve the internal structure and mechanical properties of the metal.
The quality of QSi3-1 silicon bronze plate tape is significantly improved, impurity defects are reduced, the stability of electrical performance and the excellent mechanical performance are improved, and the needs of the smart electrical industry are met.
Smart Images
Figure CN119553109A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of silicon bronze strip preparation, and in particular to a QSi3-1 silicon bronze strip and a preparation method thereof. Background Art
[0002] QSi3-1 is a silicon bronze with manganese added. It has high strength, elasticity and wear resistance, good plasticity, and does not become brittle at low temperatures. It also has excellent corrosion resistance and good machinability, weldability, cold workability and hot workability. It can be well welded with bronze, steel and other alloys. These characteristics make QSi3-1 widely used in various industrial fields, including but not limited to electronics, electrical, mechanical manufacturing, aerospace, marine engineering and chemical equipment. The physical properties of the plate and strip made of QSi3-1 silicon bronze material are outstanding, with excellent electrical conductivity and thermal conductivity, so that it has good performance in electrical and thermal conduction applications, and the mechanical properties are also outstanding, with high strength and toughness, making it suitable for manufacturing high-strength and high-wear-resistant parts.
[0003] At present, the production process of QSi3-1 silicon bronze strip suitable for the intelligent electrical industry is to continuously melt in a flat furnace, obtain the sheet, and then cold-roll and anneal it, and then cold-process it, heat-treat it and finish it. However, the obtained QSi3-1 silicon bronze strip has a high level of impurity defects, poor plasticity, and unstable electrical properties, which limits its use in the intelligent electrical industry. Based on this, the present application proposes a QSi3-1 silicon bronze strip and a preparation method thereof. Summary of the invention
[0004] The main purpose of this application is to provide a QSi3-1 silicon bronze strip and a preparation method thereof, aiming to solve the technical problem of high impurity defect level of QSi3-1 silicon bronze strip prepared by existing methods.
[0005] To achieve the above object, the present application proposes a method for preparing a QSi3-1 silicon bronze strip, comprising the following steps:
[0006] The raw materials are mixed in a ratio of 2.7%-3.5% Si content, 1.0%-1.5% Mn content, 0.5%-1% Fe content and the balance of Cu to obtain a mixture;
[0007] After the mixture is covered with a covering agent, it is heated, and after the mixture is melted, it is refined, and then cast using a steel mold to obtain an ingot;
[0008] The ingot is subjected to machining treatment on the surface, forged at 750° C.-850° C., and cooled to obtain a slab;
[0009] The slab is heated to 740° C.-840° C. for hot rolling to obtain a hot-rolled strip;
[0010] The hot-rolled strip is subjected to multiple rough rolling processes, and then subjected to solution heat treatment and pickling to obtain the strip;
[0011] The strip is annealed and then cleaned to obtain a finished QSi3-1 silicon bronze strip.
[0012] Optionally, the step of covering the mixture with a covering agent, heating the mixture, and refining the mixture after the mixture is melted comprises:
[0013] The mixture is placed in a medium frequency induction furnace, covered with a covering agent by 5 cm-8 cm, intermittently heated to 1100° C.-1300° C. and kept warm for 2 h-3 h, and after the mixture is melted, cooled to 1050° C.-1250° C. and refined for 7 min-13 min;
[0014] Wherein, the covering agent is charcoal and glass.
[0015] Optionally, after the step of refining the mixture after melting, the process further comprises:
[0016] The content of the refined mixture is tested, and metal is added based on the test results to adjust the content of the refined mixture. After vacuum degassing, the mixture is kept at 1050°C-1250°C for 7min-13min.
[0017] Optionally, the step of machining the surface of the ingot, forging at 750° C.-850° C., and cooling to obtain a slab comprises:
[0018] The riser and bottom plate of the ingot are sawed, and the surface of the ingot is turned to be bright, and then heated to 750°C-850°C in a resistance furnace and forged, with a final forging temperature of 600°C. After cooling, the surface is turned to obtain a slab.
[0019] Optionally, in the step of heating the slab to 740°C-840°C for hot rolling to obtain a hot-rolled strip, the rolling rate is 3.0m / min-4.0m / min, the hot rolling treatment time is 40min-70min, and the thickness of the hot-rolled strip is 3mm-6mm.
[0020] Optionally, the step of performing multiple rough rolling processes on the hot-rolled strip comprises:
[0021] The hot-rolled strip is subjected to multiple rough rolling processes and the deformation rate of a single rolling process is controlled to be 20%-35%, and the rolling rate of a single rolling process is 4.5m / min-5.5m / min. The hot-rolled strip is coiled when it is roughly rolled to a thickness of 2mm-3mm.
[0022] Optionally, in the steps of solution heat treatment and pickling, the temperature of the solution heat treatment is 720°C-800°C, the time of the solution heat treatment is 1.5h-2.5h, and a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid is used as the pickling solution during pickling.
[0023] Optionally, after the step of obtaining the plate strip after solution heat treatment and pickling, the step further includes:
[0024] The plate strip is subjected to multiple passes of finish rolling and the deformation rate of a single pass of rolling is controlled to be greater than 10%-20%, and the rolling rate of a single pass is 4.5m / min-5.5m / min.
[0025] Optionally, the step of annealing the strip and then cleaning it to obtain a finished QSi3-1 silicon bronze strip comprises:
[0026] The strip is heated to 650°C-700°C in a bell furnace and kept warm for 1.5h-2.5h for annealing, and then cleaned with a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid, and then polished to obtain a finished QSi3-1 silicon bronze strip.
[0027] The present application also proposes a QSi3-1 silicon bronze sheet and strip, which is obtained by the above-mentioned preparation method of the QSi3-1 silicon bronze sheet and strip.
[0028] This application includes at least the following beneficial effects:
[0029] The preparation method of the present application firstly mixes Si, Mn, Fe and Cu in a certain ratio to ensure that the obtained QSi3-1 silicon bronze strip has excellent resistivity, then covers the mixture with a covering agent and then performs smelting, casting and forging to reduce the damage of the product components during the smelting process, and also avoids the doping of impurities when the raw materials are melted, so as to ensure the purity of the internal structure of the raw material melt, reduce the impurity defects on the surface and inside of the finished strip, and effectively improve the quality of the finished strip, and then performs hot rolling treatment at a high temperature of 740°C-840°C, and then By performing multiple rough rolling processes, compared with the cold rolling process of the conventional process, the present application can ensure the complete occurrence of dynamic recrystallization of the metal components in the slab, thereby reducing the level of impurity defects in the slab, improving the internal structure of the metal, and improving the mechanical properties. Finally, after the solid solution and annealing heat treatment, the excess phase can be fully dissolved into the solid solution to obtain a supersaturated solid solution, so as to significantly improve the plasticity and toughness of the finished slab, eliminate the precipitates on the cast structure, reduce brittleness, and improve the corrosion resistance of the QSi3-1 silicon bronze slab, thereby having excellent mechanical properties. Compared with the conventional continuous smelting, cold rolling, annealing, cold working, heat treatment and finishing process, the present application adopts smelting, forging, hot rolling, rough rolling, solid solution, annealing and other processes to prepare QSi3-1 silicon bronze slabs, and the obtained finished silicon bronze slab material has very few internal and surface defects, effectively improving the product quality of the silicon bronze slab, stable electrical properties, excellent mechanical properties, easier processing, and fully meeting the requirements of QSi3-1 silicon bronze slabs on the current market. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. It is obvious that the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0031] Figure 1 This is a flow chart of the method for preparing the QSi3-1 silicon bronze strip described in the embodiments of the present application.
[0032] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0034] In view of the technical problems existing in the prior art, the embodiments of the present application provide a method for preparing a QSi3-1 silicon bronze strip, such as Figure 1 As shown, the following steps are included:
[0035] The raw materials are mixed in a ratio of 2.7%-3.5% Si content, 1.0%-1.5% Mn content, 0.5%-1% Fe content and the balance of Cu to obtain a mixture;
[0036] After the mixture is covered with a covering agent, it is heated, and after the mixture is melted, it is refined, and then cast using a steel mold to obtain an ingot;
[0037] The ingot is subjected to machining treatment on the surface, forged at 750° C.-850° C., and cooled to obtain a slab;
[0038] The slab is heated to 740° C.-840° C. for hot rolling to obtain a hot-rolled strip;
[0039] The hot-rolled strip is subjected to multiple rough rolling processes, and then subjected to solution heat treatment and pickling to obtain the strip;
[0040] The strip is annealed and then cleaned to obtain a finished QSi3-1 silicon bronze strip.
[0041] The preparation method of the present application firstly mixes Si, Mn, Fe and Cu in a certain ratio to ensure that the obtained QSi3-1 silicon bronze strip has excellent resistivity, then covers the mixture with a covering agent, and then performs smelting, casting and forging to reduce the damage of the product components during the smelting process, and also avoid the doping of impurities when the raw materials are melted, so as to ensure the purity of the internal structure of the raw material melt, thereby reducing the impurity defects on the surface and inside of the finished strip, effectively improving the quality of the finished strip, and then performing hot rolling treatment at a high temperature of 740°C-840°C. , and then multiple rough rolling treatments are performed. Compared with the cold rolling treatment of the conventional process, the present application can ensure the complete occurrence of dynamic recrystallization of the metal components in the slab, reduce the level of impurity defects in the strip, improve the internal structure of the metal, and improve the mechanical properties. Finally, after the solid solution and annealing heat treatment, the excess phase can be fully dissolved into the solid solution to obtain a supersaturated solid solution, so as to significantly improve the plasticity and toughness of the finished strip, eliminate the precipitates on the cast structure, reduce brittleness, and improve the corrosion resistance of the QSi3-1 silicon bronze strip, thereby having excellent mechanical properties. Compared with the conventional continuous smelting, cold rolling, annealing, cold working, heat treatment and finishing process, the present application adopts smelting, forging, hot rolling, rough rolling, solid solution, annealing and other processes to prepare QSi3-1 silicon bronze strips. The obtained finished silicon bronze strip material has very few internal and surface defects, effectively improves the product quality of the silicon bronze strip, has stable electrical properties, excellent mechanical properties, is easier to process, and fully meets the requirements of QSi3-1 silicon bronze strips on the market.
[0042] In the specific implementation process, the present application uses high-purity industrial silicon blocks, electrolytic manganese sheets, iron blocks and electrolytic copper plates as raw materials for proportioning, so that the QSi3-1 silicon bronze plate has excellent resistivity, can reduce and stabilize the temperature coefficient of resistance, and ensure that the resistivity of the obtained QSi3-1 silicon bronze plate remains relatively constant in different temperature changes.
[0043] As an implementation method of the present application, the step of covering the mixture with a covering agent, heating the mixture, and refining the mixture after the mixture is melted comprises:
[0044] The mixture is placed in a medium frequency induction furnace, covered with a covering agent by 5 cm-8 cm, intermittently heated to 1100° C.-1300° C. and kept warm for 2 h-3 h, and after the mixture is melted, cooled to 1050° C.-1250° C. and refined for 7 min-13 min;
[0045] Wherein, the covering agent is charcoal and glass.
[0046] Specifically, in order to reduce the damage to metal components and the doping of impurities during the smelting process, the present application covers the mixture with a covering agent before smelting, casting and forging, thereby reducing the loss of product components during the smelting process and avoiding the doping of impurities when the metal raw materials are melted, thereby ensuring the purity of the internal structure of the raw material melt, thereby reducing impurity defects on the surface and inside of the finished plate and strip, and effectively improving the quality of the QSi3-1 silicon bronze plate and strip.
[0047] As an implementation method of the present application, after the step of refining the mixture after melting, the method further includes:
[0048] The content of the refined mixture is tested, and metal is added based on the test results to adjust the content of the refined mixture. After vacuum degassing, the mixture is kept at 1050°C-1250°C for 7min-13min.
[0049] Specifically, the present application performs furnace sampling after refining, and tests the composition of the refined mixture, and adjusts the composition according to the test results. If the Si content is low, silicon blocks are added, and if the Mn content is low, manganese flakes are added. By adjusting the metal content, the loss of metal components during the melting process can be avoided, which may affect the product quality of the QSi3-1 silicon bronze plate and strip.
[0050] As an implementation method of the present application, the step of machining the surface of the ingot, forging at 750° C.-850° C., and cooling to obtain a slab comprises:
[0051] The riser and bottom plate of the ingot are sawed, and the surface of the ingot is turned to be bright, and then heated to 750°C-850°C in a resistance furnace and forged, with a final forging temperature of 600°C. After cooling, the surface is turned to obtain a slab.
[0052] Specifically, the present application can avoid defects on the surface of the ingot after smelting by sawing the ingot riser and the bottom plate, and turning the surface to be bright before forging, so as to avoid defects on the surface of the ingot after smelting, which will further affect the product quality of the QSi3-1 silicon bronze plate and strip. The present application can use a box-type resistance furnace for heating and then forging, and turn the surface after cooling, and check whether there are surface defects.
[0053] As an implementation method of the present application, in the step of heating the slab to 740℃-840℃ for hot rolling to obtain a hot-rolled strip, the rolling rate is 3.0m / min-4.0m / min, the hot rolling treatment time is 40min-70min, and the thickness of the hot-rolled strip is 3mm-6mm.
[0054] Specifically, the present application performs hot rolling treatment at a temperature of 740°C-840°C for 40min-70min. The deformation in the initial rolling pass is large, and the deformation in subsequent rolling passes gradually decreases. The temperature of the hot rolling treatment is preferably 790°C, which can ensure the complete occurrence of dynamic recrystallization of the metal components in the slab, improve the mechanical properties of the plate and strip, and reduce impurity defects in the plate and strip.
[0055] As an implementation method of the present application, the step of performing multiple rough rolling processes on the hot-rolled strip includes:
[0056] The hot-rolled strip is subjected to multiple rough rolling processes and the deformation rate of a single rolling process is controlled to be 20%-35%, and the rolling rate of a single rolling process is 4.5m / min-5.5m / min. The hot-rolled strip is coiled when it is roughly rolled to a thickness of 2mm-3mm.
[0057] As an implementable embodiment of the present application, in the steps of solution heat treatment and pickling, the temperature of the solution heat treatment is 720℃-800℃, the time of the solution heat treatment is 1.5h-2.5h, and a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid is used as the pickling solution during pickling.
[0058] Specifically, when performing solution heat treatment, a resistance heating furnace is used. It is preferred to set the temperature to 760°C and keep it warm for 2 hours, and then immerse it in water to cool. This allows the excess phase to be fully dissolved into the solid solution, and then immediately cooled to obtain a supersaturated solid solution. This can significantly improve the plasticity and toughness of the finished plate and strip. After pickling, it can be polished to reduce defects on the surface of the plate and strip and improve the product quality of the plate and strip.
[0059] As an implementation method of the present application, after the step of obtaining the plate strip after solution heat treatment and pickling, the step further includes:
[0060] The plate strip is subjected to multiple passes of finish rolling and the deformation rate of a single pass of rolling is controlled to be greater than 10%-20%, and the rolling rate of a single pass is 4.5m / min-5.5m / min.
[0061] According to the thickness requirements of QSi3-1 silicon bronze strips, the present application can perform multiple passes of finish rolling on the strips. For example, QSi3-1 silicon bronze strips with a thickness requirement of less than 1 mm need to be further finished rolled, and the thickness of the strips is monitored in real time during rolling, and parameters such as tension and reduction are adjusted at any time to prevent curling breakage.
[0062] As an implementation method of the present application, the step of annealing the strip and then cleaning it to obtain a finished QSi3-1 silicon bronze strip includes:
[0063] The strip is heated to 650°C-700°C in a bell furnace and kept warm for 1.5h-2.5h for annealing, and then cleaned with a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid, and then polished to obtain a finished QSi3-1 silicon bronze strip.
[0064] In the specific implementation process, it is preferred to carry out annealing treatment at 675°C for 2h to eliminate internal stress, improve the stability and corrosion resistance of the QSi3-1 silicon bronze strip, refine the grains, improve the internal structure of the metal, and improve the mechanical properties of the QSi3-1 silicon bronze strip. Then, the oxide scale on the surface of the QSi3-1 silicon bronze strip is removed by cleaning. If there is still a small amount of oxide scale on the surface of the finished product, a cotton polishing wheel can be used to polish the strip until the surface is bright. Polishing can also improve the aesthetics, reduce coil friction, prevent corrosion, and improve the durability of the strip.
[0065] The embodiments of the present application also provide a QSi3-1 silicon bronze sheet and strip, which is obtained by the above-mentioned preparation method of the QSi3-1 silicon bronze sheet and strip.
[0066] The above technical solution of the present application is described in detail below in conjunction with specific embodiments.
[0067] Example 1
[0068] A method for preparing a QSi3-1 silicon bronze strip comprises the following steps:
[0069] Industrial silicon blocks, electrolytic manganese sheets, high-purity iron blocks and electrolytic copper plates are used as raw materials, and the raw materials are mixed in a ratio of 3% Si content, 1.2% Mn content, 0.7% Fe content and the balance of Cu to obtain a mixture;
[0070] The mixture is placed in a crucible of a medium frequency induction furnace, and the mixture is covered by covering agents such as charcoal and glass by 7 cm, and intermittently heated to 1200° C. and kept warm for 2.5 hours. After the mixture is completely melted, the mixture is cooled to 1150° C. and refined for 10 minutes. The composition of the refined mixture is tested, and metal is added to adjust the composition content. After vacuum degassing, the mixture is kept warm at 1150° C. for 10 minutes, and then cast using a steel mold to obtain an ingot;
[0071] After machining the surface of the ingot, forging is performed at 800° C., the final forging temperature is 600° C., and after cooling, a slab is obtained;
[0072] The slab is heated to 790° C. and hot rolled for 55 min at a rolling rate of 3.5 m / min, and the slab is hot rolled to a thickness of 5 mm to obtain a hot rolled strip;
[0073] The hot-rolled strip is subjected to multiple rough rolling processes and the deformation rate of a single rolling process is controlled to be 27%, the rolling rate of a single rolling process is 5.0 m / min, and the strip is rolled up when the rough rolling process reaches a thickness of 3 mm. The strip is then subjected to solution heat treatment and pickling. The temperature of the solution heat treatment is 760° C., the time of the solution heat treatment is 2.0 h, and a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid is used as a pickling solution to obtain the strip;
[0074] The plate strip is subjected to multiple passes of finish rolling and the deformation rate of a single pass is controlled to be greater than 15% and the rolling rate of a single pass is 5.0 m / min;
[0075] The strip is heated to 670° C. in a bell furnace and kept warm for 2.0 h for annealing, and then cleaned with a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid, and then polished to obtain a finished QSi3-1 silicon bronze strip.
[0076] Example 2
[0077] A method for preparing a QSi3-1 silicon bronze strip comprises the following steps:
[0078] Industrial silicon blocks, electrolytic manganese sheets, high-purity iron blocks and electrolytic copper plates are used as raw materials, and the raw materials are mixed in a ratio of 2.7% Si content, 1.0% Mn content, 0.5% Fe content and the balance of Cu to obtain a mixture;
[0079] The mixture is placed in a crucible of a medium frequency induction furnace, and the mixture is covered by charcoal and glass as covering agents for 5 cm, and intermittently heated to 1100° C. and kept warm for 3 hours. After the mixture is melted, the mixture is cooled to 1050° C. and refined for 13 minutes. The composition of the refined mixture is tested and metal is added to adjust the composition content. After vacuum degassing, the mixture is kept warm at 1050° C. for 13 minutes, and then cast using a steel mold to obtain an ingot;
[0080] The ingot is subjected to machining treatment on the surface, forged at 750° C., the final forging temperature is 600° C., and cooled to obtain a slab;
[0081] The slab is heated to 740° C. and hot rolled for 70 min at a rolling rate of 3.0 m / min, and the slab is hot rolled to a thickness of 6 mm to obtain a hot rolled strip;
[0082] The hot-rolled strip is subjected to multiple rough rolling processes and the deformation rate of a single rolling process is controlled to be 20%, the rolling rate of a single rolling process is 4.5 m / min, and the strip is rolled up when the rough rolling process reaches a thickness of 3 mm. The strip is then subjected to solution heat treatment and pickling. The temperature of the solution heat treatment is 720° C., the time of the solution heat treatment is 2.5 h, and a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid is used as a pickling solution to obtain the strip;
[0083] The plate strip is subjected to multiple passes of finish rolling and the deformation rate of a single pass is controlled to be greater than 10% and the rolling rate of a single pass is 4.5 m / min;
[0084] The strip is heated to 650° C. in a bell furnace and kept warm for 2.5 hours for annealing, and then cleaned with a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid, and then polished to obtain a finished QSi3-1 silicon bronze strip.
[0085] Example 3
[0086] A method for preparing a QSi3-1 silicon bronze strip comprises the following steps:
[0087] Industrial silicon blocks, electrolytic manganese sheets, high-purity iron blocks and electrolytic copper plates are used as raw materials, and the raw materials are mixed in a ratio of 3.5% Si content, 1.5% Mn content, 1% Fe content and the balance of Cu to obtain a mixture;
[0088] The mixture is placed in a crucible of a medium frequency induction furnace, and the mixture is covered by covering agents such as charcoal and glass by 8 cm, and intermittently heated to 1300° C. and kept warm for 2 hours. After the mixture is completely melted, the mixture is cooled to 1250° C. and refined for 7 minutes. The composition of the refined mixture is tested and metal is added to adjust the composition content. After vacuum degassing, the mixture is kept warm at 1250° C. for 7 minutes, and then cast using a steel mold to obtain an ingot;
[0089] After machining the surface of the ingot, forging is performed at 850° C., the final forging temperature is 600° C., and after cooling, a slab is obtained;
[0090] The slab is heated to 840° C. and hot rolled for 40 min at a rolling rate of 4.0 m / min, and the slab is hot rolled to a thickness of 6 mm to obtain a hot rolled strip;
[0091] The hot-rolled strip is subjected to multiple rough rolling processes and the deformation rate of a single rolling process is controlled to be 35%, the rolling rate of a single rolling process is 5.5 m / min, and the strip is rolled up when the rough rolling process reaches a thickness of 3 mm. The strip is then subjected to solution heat treatment and pickling. The temperature of the solution heat treatment is 800° C., the time of the solution heat treatment is 1.5 h, and a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid is used as the pickling liquid during pickling to obtain the strip;
[0092] The plate strip is subjected to multiple passes of finish rolling and the deformation rate of a single pass is controlled to be greater than 20% and the rolling rate of a single pass is 5.5 m / min;
[0093] The strip is heated to 700° C. in a bell furnace and kept warm for 1.5 hours for annealing, and then cleaned with a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid, and then polished to obtain a finished QSi3-1 silicon bronze strip.
[0094] Example 4
[0095] A method for preparing a QSi3-1 silicon bronze strip comprises the following steps:
[0096] Industrial silicon blocks, electrolytic manganese sheets, high-purity iron blocks and electrolytic copper plates are used as raw materials, and the raw materials are mixed in a ratio of 2.6% Si content, 1.1% Mn content, 0.9% Fe content and the balance of Cu to obtain a mixture;
[0097] The mixture is placed in a crucible of a medium frequency induction furnace, and the mixture is covered by charcoal and glass as covering agents for 6 cm, and intermittently heated to 1250° C. and kept warm for 2.2 hours. After the mixture is completely melted, the mixture is cooled to 1200° C. and refined for 11 minutes. The composition of the refined mixture is tested and metal is added to adjust the composition content. After vacuum degassing, the mixture is kept warm at 1200° C. for 11 minutes, and then cast using a steel mold to obtain an ingot;
[0098] After machining the surface of the ingot, forging is performed at 800° C., the final forging temperature is 600° C., and after cooling, a slab is obtained;
[0099] The slab is heated to 780° C. and hot rolled for 50 min at a rolling rate of 3.7 m / min, and the slab is hot rolled to a thickness of 4 mm to obtain a hot rolled strip;
[0100] The hot-rolled strip is subjected to multiple rough rolling processes and the deformation rate of a single rolling process is controlled to be 27%, the rolling rate of a single rolling process is 5.5 m / min, and the strip is rolled up when the rough rolling process reaches a thickness of 2 mm. The strip is then subjected to solution heat treatment and pickling. The temperature of the solution heat treatment is 740° C., the time of the solution heat treatment is 1.7 h, and a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid is used as a pickling solution to obtain the strip;
[0101] The plate strip is subjected to multiple passes of finish rolling and the deformation rate of a single pass is controlled to be greater than 12% and the rolling rate of a single pass is 5.5 m / min;
[0102] The strip is heated to 690° C. in a bell furnace and kept warm for 1.9 hours for annealing, and then cleaned with a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid, and then polished to obtain a finished QSi3-1 silicon bronze strip.
[0103] Comparative Example 1
[0104] Compared with Example 1, the raw materials and proportions used are the same, the difference is: a conventional preparation process is adopted, that is, continuous smelting is carried out in a flat furnace to obtain a sheet material, which is then cold rolled and annealed, and then cold worked, heat treated and finished to obtain a QSi3-1 silicon bronze sheet.
[0105] Comparative Example 2
[0106] Compared with Example 4, the raw materials and proportions used are the same, the difference is: a conventional preparation process is adopted, that is, continuous smelting is carried out in a flat furnace to obtain a sheet material, which is then cold rolled and annealed, and then cold worked, heat treated and finished to obtain a QSi3-1 silicon bronze sheet.
[0107] Test example
[0108] The mechanical properties and physical properties of the QSi3-1 silicon bronze strip obtained in the embodiment of the present application were tested, and the test results are shown in Table 1 below.
[0109] Table 1
[0110]
[0111] It can be seen from Table 1 that compared with the QSi3-1 silicon bronze sheet and strip obtained by conventional process, the QSi3-1 silicon bronze sheet and strip prepared in the present application has higher strength and toughness, high mechanical properties, stable electrical properties, and is easier to process.
[0112] The above description is only an optional embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.
Claims
1. A method for preparing QSi3-1 silicon bronze strip, characterized in that: The following steps are involved: The raw materials are mixed in a ratio of 2.7%-3.5% Si content, 1.0%-1.5% Mn content, 0.5%-1% Fe content and the balance of Cu to obtain a mixture; After the mixture is covered with a covering agent, it is heated, and after the mixture is melted, it is refined, and then cast using a steel mold to obtain an ingot; The ingot is subjected to machining treatment on the surface, forged at 750° C.-850° C., and cooled to obtain a slab; The slab is heated to 740° C.-840° C. for hot rolling to obtain a hot-rolled strip; The hot-rolled strip is subjected to multiple rough rolling processes, and then subjected to solution heat treatment and pickling to obtain the strip; The strip is annealed and then cleaned to obtain a finished QSi3-1 silicon bronze strip.
2. The method for preparing the QSi3-1 silicon bronze strip according to claim 1, characterized in that: The step of covering the mixture with a covering agent, heating the mixture, and refining the mixture after the mixture is melted comprises: The mixture is placed in a medium frequency induction furnace, covered with a covering agent by 5 cm-8 cm, intermittently heated to 1100° C.-1300° C. and kept warm for 2 h-3 h, and after the mixture is melted, cooled to 1050° C.-1250° C. and refined for 7 min-13 min; Wherein, the covering agent is charcoal and glass.
3. The method for preparing the QSi3-1 silicon bronze strip according to claim 2, characterized in that: After the step of refining the mixture after melting, the method further comprises: The content of the refined mixture is tested, and metal is added based on the test results to adjust the content of the refined mixture. After vacuum degassing, the mixture is kept at 1050°C-1250°C for 7min-13min.
4. The method for preparing the QSi3-1 silicon bronze strip according to claim 1, characterized in that: The step of machining the surface of the ingot, forging at 750° C.-850° C., and cooling to obtain a slab comprises: The riser and bottom plate of the ingot are sawed, and the surface of the ingot is turned to be bright, and then heated to 750°C-850°C in a resistance furnace and forged, with a final forging temperature of 600°C. After cooling, the surface is turned to obtain a slab.
5. The method for preparing the QSi3-1 silicon bronze strip according to claim 1, characterized in that: In the step of heating the slab to 740°C-840°C for hot rolling to obtain a hot-rolled strip, the rolling rate is 3.0m / min-4.0m / min, the hot rolling time is 40min-70min, and the thickness of the hot-rolled strip is 3mm-6mm.
6. The method for preparing the QSi3-1 silicon bronze strip according to claim 1, characterized in that: The step of performing multiple rough rolling processes on the hot-rolled strip comprises: The hot-rolled strip is subjected to multiple rough rolling processes and the deformation rate of a single rolling process is controlled to be 20%-35%, and the rolling rate of a single rolling process is 4.5m / min-5.5m / min. The hot-rolled strip is coiled when it is roughly rolled to a thickness of 2mm-3mm.
7. The method for preparing the QSi3-1 silicon bronze strip according to claim 1, characterized in that: In the steps of solution heat treatment and pickling, the temperature of solution heat treatment is 720°C-800°C, the time of solution heat treatment is 1.5h-2.5h, and a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid is used as the pickling solution during pickling.
8. The method for preparing the QSi3-1 silicon bronze strip according to claim 1, characterized in that: After the step of obtaining the plate strip after the solution heat treatment and pickling, the step further includes: The plate strip is subjected to multiple passes of finish rolling and the deformation rate of a single pass of rolling is controlled to be greater than 10%-20%, and the rolling rate of a single pass is 4.5m / min-5.5m / min.
9. The method for preparing the QSi3-1 silicon bronze strip according to claim 1, characterized in that: The step of annealing the strip and then cleaning it to obtain a finished QSi3-1 silicon bronze strip comprises: The strip is heated to 650°C-700°C in a bell furnace and kept warm for 1.5h-2.5h for annealing, and then cleaned with a mixed solution of 30% dilute sulfuric acid and 10% dilute nitric acid, and then polished to obtain a finished QSi3-1 silicon bronze strip.
10. A QSi3-1 silicon bronze strip, characterized in that: Obtained by the preparation method of the QSi3-1 silicon bronze sheet as described in any one of claims 1 to 9.