Casting high damping manganese copper alloy material and manufacturing method thereof

Abstract

The invention discloses a casting high damping manganese-copper alloy material and a manufacturing method thereof. The mass percentages of chemical elements of the alloy material of the invention are: Cu: 19-21%, Ni: 4.5-5.5%, Fe: 3-4%, Al : 0.01‑0.05%, RE: 0.01‑0.05%, Ca: 0.001‑0.01%. RE is single element rare earth or mixed rare earth in Ce and La, and the balance is Mn and other unavoidable impurities. The alloy raw materials are melted under a protective atmosphere in a vacuum induction melting furnace, and a 0-5T transverse strong magnetic field is applied, followed by an efficient heat treatment. The invention has less alloy content and low product production cost, utilizes magnetic field magnetic braking effect to improve macrosegregation, refines solidified dendritic structure, utilizes magnetic field thermal electromagnetic convection effect to promote inclusions to float up, and achieves the effect of purifying melt and improving damping performance. The damping material of the invention has compact structure, excellent performance and low manufacturing cost.

Description

technical field [0001] The invention relates to a damping alloy and a manufacturing method thereof, in particular to a twin-type MnCu-based alloy and a manufacturing method thereof, which are applied to shock absorption, noise reduction and vibration source component materials in aerospace, automobile industry, marine engineering and the like technical field. Background technique [0002] The research on vibration and noise reduction technology is becoming more and more important with the development of modern industry. All kinds of vibration source components designed and manufactured by using damping alloys can effectively reduce the generation of vibration and fundamentally reduce the harm caused by vibration and noise. The twinned MnCu-based alloys have attracted extensive research by Chinese and foreign scholars due to their excellent damping properties. In the cooling process from high temperature to low temperature, once the secondary phase transition from paramagne...

AI Technical Summary

Problems solved by technology

[0005] However, compared with forged and rolled alloys, cast alloys have incomparable advantages such as short manufacturing process, high production efficiency, low overall cost, and environmental friendliness. Copper-based damping alloys add more rare earth element materials, the cost remains high, and the control effect on the solidification structure is not ideal. There is still much room for improvement in the damping performance of the prepared manganin-copper-based damping alloy.

[0006] The patent document with the application number CN201210491359.4 discloses a casting high damping manganese copper alloy material and its preparation method to solve the technical problem of unstable damping performance of the manganese copper alloy, but because the alloy adds more rare earth and alkaline earth Elements, the alloy preparation process is complicated and the cost is too high

[0007] The patent document with the application number CN201510401435.1 discloses a high-manganese content MnCuNiAlFe five-element damping alloy and its preparation method. The patent adds Al, Ti, and Si on the basis of MnCuNiFe for alloying, and performs high-temperature solid solution after melting and casting. Treatment to achieve the purpose of low magnetism and noise reduction, but because there is no aging treatment, the damping performance is poor

[0008] The patent document with the application number CN201611099838.6 discloses a manganese-based high-damping alloy with high thermal conductivity and its preparation method. The alloy is cast in a spinel crucible. Due to the large variety of alloys, the casting performance is poor and the alloy content is high. ,higher cost

[0009] In summary, the casting performance of MnCu-based damping alloys is not good, the crystallization temperature range is wide, and defects such as porosity and concentrated shrinkage are prone to occur, so the mechanical properties are not ideal; while the forged MnCu alloy has a uniform and dense structure, high strength, and good mechanical properties. Better than cast alloys, but the overall cost of the manufacturing process is higher

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