Alloying method for high-performance copper plate strip

Abstract

The invention relates to the technical field of copper plate strip alloy, and provides a high-performance copper plate strip alloying method which comprises the following steps: step 1, firstly adding liquid and solid paraffin into a mixing container, starting a stirrer, stirring at the rotating speed of 100-200r / min, heating while stirring until the solid paraffin is completely molten, and cooling to obtain a granulating agent; secondly, main metal and other alloy raw materials are injected into a powder mixing machine in the protective gas atmosphere, a stirrer is started, stirring is conducted at the rotating speed of 300 r / min to 500 r / min for 5 min to 10 min, then graphene powder is slowly added, the stirring rotating speed can be properly increased to 500 r / min to 800 r / min in the adding process, and stirring is conducted for 5 min to 10 min. The copper plate strip prepared by the invention has high wear resistance, shows high basic strength and hardness, has high toughness and good temperature resistance, and has good corrosion resistance in a seawater environment or in various corrosive media such as acidic and alkaline corrosion media in the aspect of corrosion resistance.

Description

Technical Field

[0001] The invention relates to the technical field of copper plate and strip alloys, in particular to a high-performance copper plate and strip alloying method. Background Art

[0002] As an important basic material, copper strips are widely used in many fields, such as electronics, machinery, construction, marine engineering, etc. With the continuous development of modern industry, the performance requirements of copper strips are increasing. In the field of electronics, copper strips are required to have good conductivity and certain mechanical properties to meet the high precision and reliability requirements of electronic components; in the field of machinery, high wear resistance, high basic strength and hardness, and good toughness are the key to ensure that mechanical parts can withstand large loads and friction during long-term use; in harsh environment applications such as marine engineering, copper strips need to have excellent corrosion resistance, high toughness and good temperature resistance to resist the erosion of corrosive media such as seawater, acids and alkalis, and the impact of temperature changes.

[0003] Traditional copper strip preparation methods are gradually unable to meet the complex needs of modern industry in terms of performance improvement. For example, during the alloying process, the distribution uniformity of alloying elements is difficult to effectively control, which may lead to local performance differences in the copper strip and affect the overall quality. Moreover, during the smelting process, metals are susceptible to problems such as oxidation and air absorption, which in turn affect the performance of the material. In addition, some existing preparation processes often find it difficult to take into account other properties when improving one or several properties of copper strips. For example, improving strength may sacrifice toughness or corrosion resistance.

[0004] In response to these problems, researchers have been exploring new methods for alloying copper strips. On the one hand, they try to optimize the performance of copper strips by adding new alloying elements or improving the proportion of alloying elements. For example, zinc, tin, aluminum, nickel and other elements have different effects on the performance of copper strips in different proportions. A reasonable ratio can significantly improve the comprehensive performance of copper strips, such as wear resistance, strength, hardness, toughness, temperature resistance and corrosion resistance. On the other hand, they continue to innovate in the preparation process, improving each link from mixing, granulation to smelting, casting and so on. For example, a special stirring process and the addition of graphene powder are introduced during the mixing process to improve the dispersion of alloy elements and enhance the performance of the material; specific granulating agents and atomizing spray technology are used during the granulation process to ensure the quality of the billet; suitable smelting equipment (such as flame smelting, induction smelting, vacuum smelting) is used during the smelting process in combination with advanced monitoring methods (temperature sensors and composition analysis instruments) and effective stirring methods (mechanical stirring or electromagnetic stirring) and refining agents (charcoal, borax, etc.) to accurately control the alloy composition and improve the alloy quality, thereby preparing copper plates and strips that meet the high performance requirements of modern industry. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a high-performance copper plate and strip alloying method, which solves the problem that some preparation processes are often difficult to take into account other properties when improving one or several properties of copper plates and strips, such as sacrificing toughness or corrosion resistance while improving strength.

[0006] To achieve the above objectives, the present invention is implemented by the following technical solutions: A high-performance copper strip alloying method comprises the following steps:

[0007] Step 1: first, add liquid and solid paraffin into a mixing container, start the stirrer, stir at a speed of 100 to 200 r / min, and heat while stirring until the solid paraffin is completely melted, and then cool to obtain a granulating agent;

[0008] Step 2: Inject the main metal and other alloy raw materials into a powder mixer under a protective gas atmosphere, start the agitator, stir at a speed of 300-500 r / min, stir for 5-10 minutes, then slowly add the graphene powder, and during the addition process, appropriately increase the stirring speed to 500-800 r / min, and stir for 5-10 minutes;

[0009] Step 3: Put the metal powder mixed in step 2 into a granulator, purge with inert gas, and spray the granulating agent prepared in step 1 onto the mixed metal powder in the form of atomization to form blank particles;

[0010] Step 4: The remelting equipment gradually increases the temperature in the furnace, and an oxidant is added during the reburning period. When the temperature of the molten pool reaches the temperature at which the billet particles are melted, the billet particles are added, and alloying is promoted by stirring during the period. After the alloying is completed, a refining agent is added to remove gas and impurities in the melt;

[0011] Step 5: Prepare a suitable casting mold, pour the molten metal that has reached the casting temperature and has qualified composition into the casting mold slowly and evenly under the protection of inert gas. During the casting process, care should be taken to avoid splashing of the molten metal and the formation of pores. After the alloy in the casting mold cools and solidifies, demolding is performed to obtain the copper sheet blank;

[0012] Step 6: Clean the surface of the blank prepared in step 5 to remove any slag and oxide scale that may be attached. After the blank passes the inspection, it enters the next processing step.

[0013] Preferably, the smelting equipment in step 4 adopts any one of flame smelting, induction smelting and vacuum smelting.

[0014] Preferably, in the step 4, the furnace equipment is monitored in real time by using a temperature sensor and a composition analysis instrument during smelting, so as to control the furnace temperature in real time and ensure the accuracy of the alloy composition.

[0015] Preferably, the stirring method in step 4 is any one of mechanical stirring or electromagnetic stirring.

[0016] Preferably, the refining agent in step 4 is any one of charcoal and borax or a mixture of the two.

[0017] Preferably, the other alloy raw materials include components consisting of the following mass percentages:

[0018] Copper (Cu) accounts for 65% to 90%, zinc (Zn) accounts for 5% to 20%, tin (Sn) accounts for 2% to 8%, aluminum (Al) accounts for 1% to 10%, and nickel (Ni) accounts for 1% to 4%.

[0019] Preferably, the other alloy raw materials include components consisting of the following mass percentages: copper (Cu) accounts for 70% to 80%, zinc (Zn) accounts for 15% to 25%, tin (Sn) accounts for 2% to 5%, aluminum (Al) accounts for 1% to 3%, and nickel (Ni) accounts for 0% to 2%.

[0020] Preferably, the other alloy raw materials include components consisting of the following mass percentages: copper (Cu) accounts for 60% to 70%, zinc (Zn) accounts for 10% to 15%, tin (Sn) accounts for 3% to 8%, aluminum (Al) accounts for 5% to 10%, and nickel (Ni) accounts for 2% to 5%.

[0021] Preferably, the other alloy raw materials include components consisting of the following mass percentages: copper (Cu) accounts for 65% to 75%, zinc (Zn) accounts for 5% to 10%, tin (Sn) accounts for 5% to 10%, aluminum (Al) accounts for 8% to 12%, and nickel (Ni) accounts for 2% to 5%.

[0022] Preferably, the other alloy raw materials include components consisting of the following mass percentages: copper (Cu) accounts for 80% to 90%, zinc (Zn) accounts for 3% to 7%, tin (Sn) accounts for 1% to 3%, aluminum (Al) accounts for 0% to 2%, and nickel (Ni) accounts for 1% to 4%.

[0023] The present invention provides a high-performance copper strip alloying method, which has the following beneficial effects:

[0024] The present invention provides a high-performance copper plate and strip alloying method, and the prepared copper plate and strip has high wear resistance, high basic strength and hardness, high toughness and good temperature resistance. In terms of corrosion resistance, it has good corrosion resistance in seawater environment or in various corrosive media such as acidic and alkaline media. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] An embodiment of the present invention provides a high-performance copper strip.

[0028] As one aspect of the present invention, the present invention provides a high-performance copper strip, comprising main metal copper and other alloy raw materials, wherein the other alloy raw materials are composed of the following components in mass percentage:

[0029] Copper (Cu) accounts for 65% to 90%, zinc (Zn) accounts for 5% to 20%, tin (Sn) accounts for 2% to 8%, aluminum (Al) accounts for 1% to 10%, and nickel (Ni) accounts for 1% to 4%.

[0030] As another aspect of the present invention, the preparation process of the high-performance copper strip proposed above includes the following steps:

[0031] Step 1: first, add liquid and solid paraffin into a mixing container, start the stirrer, stir at a speed of 100 to 200 r / min, and heat while stirring until the solid paraffin is completely melted, and then cool to obtain a granulating agent;

[0032] Step 2: Inject the main metal copper and other alloy raw materials into a powder mixer under a protective gas atmosphere, start the agitator, stir at a speed of 300-500 r / min, stir for 5-10 minutes, then slowly add the graphene powder, and during the addition process, appropriately increase the stirring speed to 500-800 r / min, and stir for 5-10 minutes;

[0033] Step 3: Put the metal powder mixed in step 2 into a granulator, purge with inert gas, and spray the granulating agent prepared in step 1 onto the mixed metal powder in the form of atomization to form blank particles;

[0034] Step 4: The remelting equipment gradually increases the temperature in the furnace, wherein the smelting equipment adopts any one of flame smelting, induction smelting and vacuum smelting. Flame smelting is heated by the flame generated by the burner burning fuel and oxidant; induction smelting relies on eddy current heating generated by electromagnetic induction; vacuum smelting uses a heating system to heat in a vacuum environment. When the temperature reaches the melting point of copper or the main metal, the metal begins to melt and form a molten pool. An oxidant is added during the reburning period. When the molten pool temperature reaches the temperature at which the billet particles are melted, the billet particles are added. During this period, alloying is promoted by any one of mechanical stirring or electromagnetic stirring. After alloying is completed, charcoal or borax is added to remove gases and impurities in the melt. Charcoal can absorb gases in the melt, and borax can react with some impurities to generate compounds with lower melting points, which float on the surface of the melt for easy removal. When the furnace equipment is smelting, temperature sensors and component analyzers are used for real-time monitoring to control the furnace temperature in real time and ensure the accuracy of the alloy composition.

[0035] Step 5: Prepare a suitable casting mold, pour the molten metal that has reached the casting temperature and has qualified composition into the casting mold slowly and evenly under the protection of inert gas, such as casting in an argon atmosphere to reduce the oxidation of the alloy. During the casting process, care should be taken to avoid splashing of the molten metal and the generation of pores. After the alloy in the casting mold is cooled and solidified, demolding is performed to obtain a copper strip blank;

[0036] Step 6: Clean the surface of the blank prepared in step 5 to remove any slag and scale that may be attached, and then inspect the blank for quality, including dimensional accuracy, component analysis, and internal defect inspection. The blank that passes the inspection will enter the next processing step, such as hot rolling or cold rolling.

[0037] Embodiment 1:

[0038] Other alloy raw materials of a high-performance alloyed copper sheet and strip include components consisting of the following mass percentages: copper (Cu) accounts for 75%, zinc (Zn) accounts for 20%, tin (Sn) accounts for 2%, aluminum (Al) accounts for 1%, and nickel (Ni) accounts for 2%.

[0039] Embodiment 2:

[0040] Other alloy raw materials of a high-performance alloyed copper sheet and strip include components consisting of the following mass percentages: copper (Cu) accounts for 69%, zinc (Zn) accounts for 13%, tin (Sn) accounts for 6%, aluminum (Al) accounts for about 9%, and nickel (Ni) accounts for 3%.

[0041] Embodiment 3:

[0042] Other alloy raw materials of a high-performance alloyed copper sheet and strip include components consisting of the following mass percentages: copper (Cu) accounts for 70%, zinc (Zn) accounts for 8%, tin (Sn) accounts for about 8%, aluminum (Al) accounts for 10%, and nickel (Ni) accounts for 4%.

[0043] Embodiment 4:

[0044] Other alloy raw materials of a high-performance alloyed copper sheet and strip include components consisting of the following mass percentages: copper (Cu) accounts for 85%, zinc (Zn) accounts for 5%, tin (Sn) accounts for 2%, aluminum (Al) accounts for 1%, and nickel (Ni) accounts for 2%.

[0045] Five groups of alloyed copper strips of the same model were selected, and under the same conditions, the high-performance alloyed copper strips of the above embodiment and a traditional copper strip were used for copper strips. The performance was tested under laboratory simulation of multiple working conditions, including wear resistance test (using a wear tester to simulate the friction environment), toughness and temperature resistance test (through impact test and high temperature tensile test), basic strength and hardness test (using a universal testing machine), corrosion resistance test (immersed in simulated seawater, acidic solution and alkaline solution) and stress corrosion cracking resistance test (observed under specific stress and corrosive medium environment), and compared with the copper strip performance of Examples 1-4. The results are shown in Table 1 below.

[0046] Table 1:

[0047]

[0048] By testing and comparing the alloyed copper plates and strips of Examples 1-4 and the comparative example in terms of wear resistance, toughness and temperature resistance, basic strength and hardness, corrosion resistance and stress corrosion cracking resistance, the following conclusions can be drawn: Due to the higher content of tin, aluminum and other elements in the alloy components of Examples 2 and 3, these elements help to form a wear-resistant microstructure or strengthening phase, thereby improving the wear resistance of the material in a friction environment and showing high wear resistance, while Example 1 and Example 4 have a medium level of wear resistance, the comparative example shows lower wear resistance, and Examples 2 and Example 3 again show high basic strength and hardness as well as high toughness and good temperature resistance, and perform well in corrosion resistance, and have good corrosion resistance in seawater environments or in various corrosive media such as acidic and alkaline media.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high performance copper strip alloying method, characterized in that: The following steps are involved: Step 1: first, add liquid and solid paraffin into a mixing container, start the stirrer, stir at a speed of 100 to 200 r / min, and heat while stirring until the solid paraffin is completely melted, and then cool to obtain a granulating agent; Step 2: Inject the main metal and other alloy raw materials into a powder mixer under a protective gas atmosphere, start the agitator, stir at a speed of 300-500 r / min, stir for 5-10 minutes, then slowly add the graphene powder, and during the addition process, appropriately increase the stirring speed to 500-800 r / min, and stir for 5-10 minutes; Step 3: Put the metal powder mixed in step 2 into a granulator, purge with inert gas, and spray the granulating agent prepared in step 1 onto the mixed metal powder in the form of atomization to form blank particles; Step 4: The remelting equipment gradually increases the temperature in the furnace, and an oxidant is added during the reburning period. When the temperature of the molten pool reaches the temperature at which the billet particles are melted, the billet particles are added, and alloying is promoted by stirring during the period. After the alloying is completed, a refining agent is added to remove gas and impurities in the melt; Step 5: Prepare a suitable casting mold, pour the molten metal that has reached the casting temperature and has qualified composition into the casting mold slowly and evenly under the protection of inert gas. During the casting process, care should be taken to avoid splashing of the molten metal and the formation of pores. After the alloy in the casting mold cools and solidifies, demolding is performed to obtain the copper sheet blank; Step 6: Clean the surface of the blank prepared in step 5 to remove any slag and oxide scale that may be attached. After the blank passes the inspection, it enters the next processing step.

2. A high performance copper strip alloying method according to claim 1, characterized in that: The smelting equipment in step 4 adopts any one of flame smelting, induction smelting and vacuum smelting.

3. A high performance copper strip alloying method according to claim 1, characterized in that: In the step 4, the furnace equipment is used for real-time monitoring when smelting, using temperature sensors and composition analysis instruments to control the furnace temperature in real time and ensure the accuracy of the alloy composition.

4. A high performance copper strip alloying method according to claim 1, characterized in that: The stirring method in step 4 is either mechanical stirring or electromagnetic stirring.

5. A high performance copper strip alloying method according to claim 1, characterized in that: The refining agent in step 4 is any one of charcoal and borax or a mixture of the two.

6. A high performance copper strip alloying method according to claim 1, characterized in that: The other alloy raw materials include components consisting of the following mass percentages: Copper (Cu) accounts for 65% to 90%, zinc (Zn) accounts for 5% to 20%, tin (Sn) accounts for 2% to 8%, aluminum (Al) accounts for 1% to 10%, and nickel (Ni) accounts for 1% to 4%.

7. A high performance copper strip alloying method according to claim 6, characterized in that: The other alloy raw materials include components consisting of the following mass percentages: copper (Cu) accounts for 70% to 80%, zinc (Zn) accounts for 15% to 25%, tin (Sn) accounts for 2% to 5%, aluminum (Al) accounts for 1% to 3%, and nickel (Ni) accounts for 0% to 2%.

8. A high performance copper strip alloying method according to claim 6, characterized in that: The other alloy raw materials include components consisting of the following mass percentages: copper (Cu) accounts for 60% to 70%, zinc (Zn) accounts for 10% to 15%, tin (Sn) accounts for 3% to 8%, aluminum (Al) accounts for 5% to 10%, and nickel (Ni) accounts for 2% to 5%.

9. A high performance copper strip alloying method according to claim 6, characterized in that: The other alloy raw materials include components consisting of the following mass percentages: copper (Cu) accounts for 65% to 75%, zinc (Zn) accounts for 5% to 10%, tin (Sn) accounts for 5% to 10%, aluminum (Al) accounts for 8% to 12%, and nickel (Ni) accounts for 2% to 5%.

10. A high performance copper strip alloying method according to claim 6, characterized in that: The other alloy raw materials include components consisting of the following mass percentages: copper (Cu) accounts for 80% to 90%, zinc (Zn) accounts for 3% to 7%, tin (Sn) accounts for 1% to 3%, aluminum (Al) accounts for 0% to 2%, and nickel (Ni) accounts for 1% to 4%.

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