Sound-absorbing alloy microwell plate and preparation method and application thereof

Abstract

The present application relates to the technical field of alloy sheet, in particular to a sound-absorbing alloy microporous plate, a preparation method and application thereof, the element composition of the sound-absorbing alloy microporous plate comprises Cu: 20%-25%, Al: 8%-12%, Ni: 8%-12%, Ti: 0.5%-1.0%, Cr: 5%-8%, Mo: 1.5%-3.0%, B: 0.02%-0.06%, and the balance is Mn and inevitable impurities.The sound-absorbing alloy microporous plate provided by the present application has high damping performance, excellent sound-absorbing performance, good corrosion resistance and mechanical strength, and can be applied to various complex noise environments.

Description

Technical Field

[0001] This invention relates to the field of alloy sheet technology, and in particular to a sound-absorbing alloy microporous plate, its preparation method, and its application. Background Technology

[0002] Noise pollution, as an excessive or uncontrolled environmental disturbance, is widely recognized as a serious public nuisance. Its sources encompass four major areas: industry, construction, transportation, and social life. To protect the living environment, my country's urban noise standards divide areas into five categories, strictly controlling daytime (50-70 decibels) and nighttime (40-55 decibels) limits. Long-term exposure to noise above 90 decibels can cause hearing damage, while sudden noise at 150 decibels can even lead to ruptured eardrums or heart disease.

[0003] Currently, sound-absorbing materials are the core means of noise control, mainly divided into two categories: organic and metal. However, although organic materials (such as glass wool and polyurethane foam) have a high sound absorption coefficient, they have drawbacks such as easy aging and combustion at high temperatures and low mechanical strength; traditional metal sound-absorbing materials, although resistant to high temperatures, are prone to corrosion in long-term humid environments, resulting in a short service life.

[0004] Therefore, in order to effectively reduce noise pollution, it is urgent to develop a sound-absorbing material that is resistant to high temperatures and corrosion and has high mechanical strength. Summary of the Invention

[0005] The purpose of this invention is to provide a sound-absorbing alloy microporous plate, its preparation method, and its application, so as to solve the problem that current metal sound-absorbing materials cannot simultaneously meet the requirements of high temperature resistance, corrosion resistance, and high mechanical strength.

[0006] To achieve the above objectives, the present invention provides a sound-absorbing alloy microporous plate, comprising, based on 100% of the mass of the sound-absorbing alloy microporous plate: Cu: 20%-25%, Al: 8%-12%, Ni: 8%-12%, Ti: 0.5%-1.0%, Cr: 5%-8%, Mo: 1.5%-3.0%, B: 0.02%-0.06%, with the balance being Mn and unavoidable impurities.

[0007] In this invention, the hole spacing of the sound-absorbing alloy microporous plate is 1.5-4.5 mm, and the hole diameter is 0.1-1 mm.

[0008] This invention also provides a method for preparing the above-mentioned sound-absorbing alloy microporous plate, comprising the following preparation steps: S1. Under a protective atmosphere, the raw materials are mixed according to the elemental composition of the sound-absorbing alloy microporous plate, melted, and cast to obtain an alloy ingot. S2. The alloy ingot is homogenized and then hot-rolled to obtain sound-absorbing alloy sheet. S3. The sound-absorbing alloy sheet is solution treated, cooled and then stamped, followed by aging treatment to obtain a sound-absorbing alloy microporous plate.

[0009] In this invention, the protective atmosphere in S1 includes argon, the melting temperature is 1300-1500℃, and the melting holding time is 30-60min.

[0010] In this invention, the homogenization temperature in S2 is 1100-1180℃, and the holding time for homogenization is 10-20h.

[0011] In this invention, the final rolling temperature of hot rolling in S2 is 850-900℃.

[0012] In this invention, the solution treatment temperature in S3 is 1050-1150℃, and the solution treatment holding time is 0.5-2h.

[0013] In this invention, the aging treatment temperature in S3 is 450-550℃, and the aging treatment holding time is 4-10h.

[0014] This invention also provides the application of the aforementioned sound-absorbing alloy microporous plate in the field of sound-absorbing building materials.

[0015] The present invention has the following beneficial effects: This invention provides a sound-absorbing alloy microporous plate, comprising, by weight 100%, the following: Cu: 20%-25%, Al: 8%-12%, Ni: 8%-12%, Ti: 0.5%-1.0%, Cr: 5%-8%, Mo: 1.5%-3.0%, B: 0.02%-0.06%, with the balance being Mn and unavoidable impurities.

[0016] This invention uses the Mn-Cu system as the base alloy and achieves high damping through the movement of twin boundaries during martensitic phase transformation. The Mn-Cu alloy undergoes a martensitic phase transformation at low temperatures, forming numerous twin boundaries. When the stress generated by sound waves or vibrations acts on the sound-absorbing alloy microporous plate, reversible micro-slip occurs at the twin boundaries, accompanied by dislocation movement at the twin boundaries. Mechanical vibration energy (acoustic energy) is converted into heat energy dissipation through interfacial friction and dislocation crossing, achieving a sound absorption effect. Furthermore, elements such as Ti and Mo are added to the system, forming nanoscale intermetallic compounds (nanophases) during subsequent solution treatment and aging treatment. The nanophases have lattice mismatches with the Mn-Cu matrix, forming a high-density phase interface. When subjected to vibration, the phase interface undergoes minute viscous slip or dislocation pile-up, generating additional interfacial friction energy dissipation, further increasing sound energy consumption and enhancing the sound absorption effect. Bo (Ti) can inhibit austenite grain growth, increase the number of grain boundaries, further increase damping performance, and simultaneously improve the mechanical toughness of the sound-absorbing alloy microporous plate.

[0017] This invention improves the corrosion resistance of sound-absorbing alloy microporous plates by adding Ni, Cr, Mo, and Al elements. Cr and Ni form a dense oxide film mainly composed of Cr2O3 and NiO, which isolates corrosive media. Mo further enhances the stability of the dense oxide film, significantly improving resistance to pitting and crevice corrosion. Al forms an Al2O3 film, further enhancing resistance to oxidation and acid / alkali corrosion.

[0018] This invention achieves solid solution strengthening by adding Ni, Al, and Cr elements, which can dissolve into the Mn matrix and synergistically enhance the matrix lattice distortion with Cu. After aging treatment, Ti and Mo precipitate dispersed nanoscale second phases such as TiMo2 and MnTi, which can effectively hinder dislocation movement and achieve second phase strengthening.

[0019] Element B refines the alloy grains, achieving fine grain strengthening and improving the mechanical strength of the sound-absorbing alloy microporous plate.

[0020] This invention further specifies that the spacing between the holes in the sound-absorbing alloy microporous plate is 1.5-4.5 mm, and the hole diameter is 0.1-1 mm. The 0.1-1 mm micropores can convert incident sound energy into vibration energy between the air inside the hole and the hole wall. The martensitic twin boundaries, nano-phase interfaces, and other damping sources in the sound-absorbing alloy microporous plate can quickly dissipate the vibration energy of the hole wall into heat energy, reducing the secondary noise generated by vibration rebound inside the hole.

[0021] The sound-absorbing alloy microporous plate provided by this invention has high damping performance, excellent sound absorption performance, good corrosion resistance and mechanical strength.

[0022] This invention also provides a method for preparing a sound-absorbing alloy microporous plate, comprising the following preparation steps: S1, under a protective atmosphere, mixing raw materials according to the elemental composition of the sound-absorbing alloy microporous plate, melting and casting to obtain an alloy ingot; S2, homogenizing the alloy ingot, and then hot rolling to obtain a sound-absorbing alloy sheet; S3, solution treating the sound-absorbing alloy sheet, cooling and then stamping, and then aging to obtain a sound-absorbing alloy microporous plate.

[0023] This invention employs homogenization treatment to reduce the segregation of Mn and Cu components in alloy ingots, thereby ensuring that the Mn-rich matrix phase and Cu-rich precipitates are uniformly distributed at the microscale. At the same time, it eliminates defects such as as-cast porosity and gas pores, improves the density of the alloy structure, and strengthens the bonding strength of the phase interfaces.

[0024] Solution treatment can repair the deformed Mn-Cu solid solution lattice during hot rolling and restore the slip ability of the phase interface. Aging treatment can control the precipitation morphology and size of Ti and Mo second phases, ensuring that the second phases are dispersed at the nanoscale, thereby improving the mechanical properties of the sound-absorbing alloy microporous plate.

[0025] The technical solution of the present invention will be further described in detail below through embodiments. Detailed Implementation

[0026] The present invention will be further described below with reference to embodiments. Unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art. The features mentioned above or in the specific examples mentioned in this invention can be combined arbitrarily, and these specific embodiments are only used to illustrate the invention and are not intended to limit the scope of the invention.

[0027] Example 1 A sound-absorbing alloy microporous plate, based on 100% of the mass of the sound-absorbing alloy microporous plate, comprises: Mn: 51.2%, Cu: 23.4%, Al: 9.3%, Ni: 8.2%, Ti: 0.7%, Cr: 5.0%, Mo: 2.0%, B: 0.02%, with the balance being unavoidable impurities.

[0028] The preparation method of the above-mentioned sound-absorbing alloy microporous plate includes the following preparation steps: S1. Under an argon atmosphere, oxygen-free copper blocks, electrolytic manganese sheets, aluminum ingots, nickel plates, sponge titanium particles, chromium blocks, molybdenum strips, and pure boron powder are mixed according to the elemental composition of the sound-absorbing alloy microporous plate. The mixture is placed in a vacuum induction melting furnace and melted at 1350℃ for 60 minutes. Then it is poured to obtain an alloy ingot. S2. The obtained alloy ingot is homogenized at 1100℃ for 15 hours, and then hot rolled at a final rolling temperature of 850℃ to obtain a sound-absorbing alloy plate with a thickness of 7mm. S3. Place the obtained sound-absorbing alloy plate in a resistance furnace and solution treat it at 1050℃ for 2 hours. Then, quench it in water to room temperature and place it on a CNC punch press. Use a round punch (0.5mm in diameter) to punch holes in a square array with a hole spacing of 3mm. Then, place it in a vacuum furnace and age it at 450℃ for 10 hours to obtain a sound-absorbing alloy microporous plate.

[0029] Example 2 A sound-absorbing alloy microporous plate, based on 100% of the mass of the sound-absorbing alloy microporous plate, comprises: Mn: 46.63%, Cu: 22.4%, Al: 10.2%, Ni: 9.3%, Ti: 0.5%, Cr: 7.3%, Mo: 2.8%, B: 0.05%, with the balance being unavoidable impurities.

[0030] The preparation method of the above-mentioned sound-absorbing alloy microporous plate includes the following preparation steps: S1. Under an argon atmosphere, oxygen-free copper blocks, electrolytic manganese sheets, aluminum ingots, nickel plates, sponge titanium particles, chromium blocks, molybdenum strips, and pure boron powder are mixed according to the elemental composition of the sound-absorbing alloy microporous plate. The mixture is placed in a vacuum induction melting furnace and melted at 1300℃ for 60 minutes. Then it is poured to obtain an alloy ingot. S2. The obtained alloy ingot is homogenized at 1150℃ for 10 hours, and then hot rolled at a final rolling temperature of 850℃ to obtain a sound-absorbing alloy plate with a thickness of 7mm. S3. Place the obtained sound-absorbing alloy plate in a resistance furnace and solution treat it at 1100℃ for 1 hour. Then, quench it in water to room temperature and place it on a CNC punch press. Use a round punch (0.8mm in diameter) to punch holes in a square array with a hole spacing of 1.5mm. Then, place it in a vacuum furnace and age it at 450℃ for 8 hours to obtain a sound-absorbing alloy microporous plate.

[0031] Example 3 A sound-absorbing alloy microporous plate, based on 100% of the weight of the sound-absorbing alloy microporous plate, comprises: Mn: 44.15%, Cu: 24.6%, Al: 8.0%, Ni: 11.7%, Ti: 1.0%, Cr: 7.1%, Mo: 3.0%, B: 0.06%, with the balance being unavoidable impurities.

[0032] The preparation method of the above-mentioned sound-absorbing alloy microporous plate includes the following preparation steps: S1. Under an argon atmosphere, oxygen-free copper blocks, electrolytic manganese sheets, aluminum ingots, nickel plates, sponge titanium particles, chromium blocks, molybdenum strips, and pure boron powder are mixed according to the elemental composition of the sound-absorbing alloy microporous plate. The mixture is placed in a vacuum induction melting furnace and melted at 1500℃ for 30 minutes. Then it is poured to obtain an alloy ingot. S2. The obtained alloy ingot is homogenized at 1150℃ for 18 hours, and then hot rolled at a final rolling temperature of 900℃ to obtain a sound-absorbing alloy plate with a thickness of 7mm. S3. The obtained sound-absorbing alloy plate is placed in a resistance furnace and solution treated at 1150℃ for 0.5h. After water quenching to room temperature, it is placed on a CNC punch press and punched with a round punch (1mm in diameter) in a square array with a hole spacing of 2mm. Then it is placed in a vacuum furnace and aged at 500℃ for 5h to obtain a sound-absorbing alloy microporous plate.

[0033] Example 4 A sound-absorbing alloy microporous plate, based on 100% of the weight of the sound-absorbing alloy microporous plate, comprises: Mn: 47.8%, Cu: 25%, Al: 10.9%, Ni: 8.0%, Ti: 0.5%, Cr: 5%, Mo: 2.5%, B: 0.02%, with the balance being unavoidable impurities.

[0034] The preparation method of the above-mentioned sound-absorbing alloy microporous plate includes the following preparation steps: S1. Under an argon atmosphere, oxygen-free copper blocks, electrolytic manganese sheets, aluminum ingots, nickel plates, sponge titanium particles, chromium blocks, molybdenum strips, and pure boron powder are mixed according to the elemental composition of the sound-absorbing alloy microporous plate. The mixture is placed in a vacuum induction melting furnace and melted at 1350℃ for 45 minutes. Then it is poured to obtain an alloy ingot. S2. The obtained alloy ingot is homogenized at 1100℃ for 20 hours, and then hot rolled at a final rolling temperature of 850℃ to obtain a sound-absorbing alloy plate with a thickness of 7mm. S3. Place the obtained sound-absorbing alloy plate in a resistance furnace and solution treat it at 1050℃ for 1.5h. Then, quench it in water to room temperature. Then, place it on a CNC punch press and punch holes in a square array with a hole spacing of 2mm using a round punch (0.5mm in diameter). Then, place it in a vacuum furnace and age it at 550℃ for 5h to obtain a sound-absorbing alloy microporous plate.

[0035] Comparative Example 1 An alloy microporous plate, based on 100% of the alloy microporous plate mass, comprises: Mn: 65.8%, Cu: 33.2%, Ti: 0.7%, B: 0.02%, with the balance being unavoidable impurities.

[0036] The preparation method of the above-mentioned alloy microporous plate includes the following preparation steps: S1. Under an argon atmosphere, oxygen-free copper blocks, electrolytic manganese sheets, sponge titanium particles, and pure boron powder are mixed according to the elemental composition of the alloy microporous plate, melted at 1350℃ for 60 minutes, and then poured to obtain an alloy ingot. S2. The obtained alloy ingot is homogenized at 1100℃ for 15 hours, and then hot rolled at a final rolling temperature of 850℃ to obtain an alloy plate with a thickness of 7mm. S3. Place the obtained alloy plate in a resistance furnace and solution treat it at 1050℃ for 2 hours. Then, quench it in water to room temperature and place it on a CNC punch press. Use a round punch (0.5mm in diameter) to punch holes in a square array with a hole spacing of 3mm. Then, place it in a vacuum furnace and age it at 450℃ for 10 hours to obtain an alloy microporous plate.

[0037] Performance testing: The damping properties of the sound-absorbing alloy microporous plates prepared in Examples 1-4 and the alloy microporous plate prepared in Comparative Example 1 were tested using a DMA-Q800 dynamic thermomechanical analyzer. The three-point bending mode was used to measure the alloy damping properties, with a test vibration frequency of 0.1 Hz and an amplitude of 5 × 10⁻⁶. -5 The results are shown in Table 1.

[0038] Table 1 Damping performance test results

[0039] As can be seen from Table 1, the sound-absorbing alloy microporous plate prepared by the present invention also has excellent damping performance in high-temperature environments and can be used as a sound-absorbing material under high-temperature conditions.

[0040] Sound absorption performance test: The sound absorption performance of the sound-absorbing alloy microporous plates prepared in Examples 1-4 and the alloy microporous plate prepared in Comparative Example 1 in the low-frequency range (100-150Hz) was tested by impedance tube method, and the results of their sound absorption coefficients (a) are shown in Table 2.

[0041] Table 2 Sound absorption performance test results

[0042] As can be seen from Table 2, the sound-absorbing alloy microporous plate provided by the present invention has a good sound absorption effect at low frequencies.

[0043] Mechanical property testing: The mechanical properties of the sound-absorbing alloy microporous plates prepared in Examples 1-4 and the alloy microporous plate prepared in Comparative Example 1 were tested at room temperature. The tensile curves of the specimens were tested using a 10kN testing machine with a 15mm extensometer. The test strain rate was 0.0067 / s and the preload was 5MPa. The results are shown in Table 3.

[0044] Table 3 Mechanical Performance Test Results

[0045] As can be seen from Table 3, the sound-absorbing alloy microporous plate provided by the present invention has excellent mechanical strength and a wide range of applications.

[0046] Salt spray corrosion test: The salt spray corrosion resistance of the sound-absorbing alloy microporous plates prepared in Examples 1-4 and the alloy microporous plate prepared in Comparative Example 1 was tested according to GB / T 12967.3-2008, specifically including the following steps: The samples obtained above were cleaned and dried, and then placed in a salt spray corrosion chamber of YWX / Q-250B. The sodium chloride concentration in the salt spray corrosion chamber was set to (5±0.5)%, the pH was 3, and the temperature was (50±1)℃. After 48 hours, the maximum corrosion depth on the surface was measured. The results are shown in Table 4.

[0047] Table 4 Results of Salt Spray Corrosion Test

[0048] As can be seen from Table 4, the alloy microporous plate provided by the present invention has excellent corrosion resistance and can adapt to a variety of complex environments.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A sound-absorbing alloy microporous plate, characterized in that, Based on 100% of the mass of the sound-absorbing alloy microporous plate, it includes: Cu: 20%-25%, Al: 8%-12%, Ni: 8%-12%, Ti: 0.5%-1.0%, Cr: 5%-8%, Mo: 1.5%-3.0%, B: 0.02%-0.06%, with the balance being Mn and unavoidable impurities; The sound-absorbing alloy microporous plate has a hole spacing of 1.5-4.5 mm and a hole diameter of 0.1-1 mm. The method for preparing the sound-absorbing alloy microporous plate includes the following preparation steps: S1. Under a protective atmosphere, the raw materials are mixed according to the elemental composition of the sound-absorbing alloy microporous plate, melted, and cast to obtain an alloy ingot. S2. The alloy ingot is homogenized and then hot-rolled to obtain sound-absorbing alloy sheet. S3. The sound-absorbing alloy sheet is subjected to solution treatment, cooled and then stamped, followed by aging treatment to obtain a sound-absorbing alloy microporous plate. The homogenization temperature in S2 is 1100-1180℃, and the holding time for homogenization is 10-20h; The solution treatment temperature in S3 is 1050-1150℃, and the holding time for the solution treatment is 0.5-2h. The aging treatment temperature in S3 is 450-550℃, and the holding time for aging treatment is 4-10h.

2. The method for preparing a sound-absorbing alloy microporous plate according to claim 1, characterized in that, The preparation steps include the following: S1. Under a protective atmosphere, the raw materials are mixed according to the elemental composition of the sound-absorbing alloy microporous plate, melted, and cast to obtain an alloy ingot. S2. The alloy ingot is homogenized and then hot-rolled to obtain sound-absorbing alloy sheet. S3. The sound-absorbing alloy sheet is subjected to solution treatment, cooled and then stamped, followed by aging treatment to obtain a sound-absorbing alloy microporous plate. The homogenization temperature in S2 is 1100-1180℃, and the holding time for homogenization is 10-20h; The solution treatment temperature in S3 is 1050-1150℃, and the holding time for the solution treatment is 0.5-2h. The aging treatment temperature in S3 is 450-550℃, and the holding time for aging treatment is 4-10h.

3. The method for preparing a sound-absorbing alloy microporous plate according to claim 2, characterized in that, The melting temperature in S1 is 1300-1500℃, and the holding time is 30-60 minutes.

4. The method for preparing a sound-absorbing alloy microporous plate according to claim 2, characterized in that, The final rolling temperature of hot rolling in S2 is 850-900℃.

5. The application of the sound-absorbing alloy microporous plate according to claim 1 in the field of sound-absorbing building materials.

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