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CN-121992305-A - Ferromagnetic damping alloy and preparation method thereof

CN121992305ACN 121992305 ACN121992305 ACN 121992305ACN-121992305-A

Abstract

The invention discloses a ferromagnetic damping alloy and a preparation method thereof, wherein the alloy comprises the following chemical components in percentage by mass, the balance of ：C≤0.01%、Mn≤0.01%、Cu 0.40-0.60%、P≤0.01%、S≤0.01%、Cr 12.00-13.50%、Al 1.00-3.00%、Re 0.09%、Zr 0.12%、O≤0.010%、N≤0.010%、H≤0.00005%, being Fe and unavoidable impurities. The preparation method comprises the steps of vacuum induction smelting and casting an electrode, electroslag remelting, forging heating and forging forming, forging stock annealing treatment and solution heat treatment, wherein the vacuum refining temperature is 1600+/-10 ℃, the refining vacuum degree is less than or equal to 10Pa, the refining time is more than or equal to 40min, the electrode and an electroslag steel ingot are annealed at 850+/-10 ℃ for 6-8h and cooled to 600 ℃ and then air-cooled, the forging heating is carried out for Wen Zhuanglu h at 300 ℃ and is heated to 1000-1100 ℃ at 80 ℃ per hour, and the forging stock annealing and the solution heat treatment are respectively carried out at 850+/-10 ℃ and 1000+/-10 ℃.

Inventors

  • JI HONGWEI
  • LIN YU
  • ZHOU ERYONG
  • ZHANG HUI
  • Niu Jianke
  • LIU QIANG
  • SHI JUN
  • SUN HAITAO
  • GAO LEI
  • LI CHUNJIANG

Assignees

  • 江西宝顺昌超合金股份有限公司

Dates

Publication Date
20260508
Application Date
20260122

Claims (10)

  1. 1. A ferromagnetic damping alloy is characterized by comprising the following chemical components in percentage by mass: C：≤0.01%;Mn：≤0.01%;Cu：0.40-0.60%;P：≤0.01%;S：≤0.01%;Cr：12.00-13.50%;Al：1.00-3.00%;Re：0.09%;Zr：0.12%;O：≤0.010%;N：≤0.010%;H：≤0.00005%; The balance being Fe and other unavoidable impurities.
  2. 2. The ferromagnetic damping alloy according to claim 1, wherein the chemical composition comprises ：C：≤0.01%;Mn：≤0.01%;Cu：0.45-0.55%;P：≤0.01%;S：≤0.01%;Cr：12.2-12.6%;Al：1.60-2.30%;Re：0.09%;Zr：0.12%;O：≤0.002%;N：≤0.002%;H：≤0.00005%;% by mass of Fe and other unavoidable impurities as the balance.
  3. 3. A method of producing a ferromagnetic damping alloy according to claim 1 or 2, comprising the steps of: S1, vacuum induction melting and pouring an electrode: putting pure iron blocks, metallic chromium and cathode copper into a vacuum induction furnace for smelting, wherein the vacuum degree is less than or equal to 20Pa during smelting; Refining after melting; Adding an aluminum block and a zirconium block after the molten steel surface is calm, and delaying for 10min to continue refining; Then argon is filled, the argon filling pressure is more than or equal to 2kPa, and rare earth La is added; Adding 2kg of nickel-magnesium alloy, regulating the temperature of molten steel to 1600+/-10 ℃ within 10min, and carrying out charged casting to form an electrode; s2, electroslag remelting, namely carrying out electroslag remelting on the electrode to obtain an electroslag steel ingot; s3, forging heating and forging forming, namely forging heating the electroslag steel ingot, and forging forming after discharging; S4, annealing treatment of the forged forging stock, namely annealing treatment of the forged forging stock; And S5, solution heat treatment, namely performing solution heat treatment on the annealed alloy to obtain the ferromagnetic damping alloy.
  4. 4. The method according to claim 3, wherein in the step S1, the refining condition is that the refining vacuum degree is less than or equal to 10Pa, the refining time is more than or equal to 40min, and the refining temperature is 1600+/-10 ℃.
  5. 5. The method according to claim 3, wherein the electrode is annealed at 850+ -10deg.C for 6-8 hours after the step S1 and before the step S2, and is cooled to 600 deg.C at a cooling rate of 30 ℃ or less and then cooled to the outside.
  6. 6. The method according to claim 3, wherein after the step S2 and before the step S3 is started, the method further comprises the steps of annealing the electroslag steel ingot at 850+/-10 ℃ for 6-8 hours, and then discharging the steel ingot from the furnace for air cooling after the steel ingot is cooled to 600 ℃ at a cooling rate of less than or equal to 30 ℃ per hour.
  7. 7. The method according to claim 3, wherein in the step S3, the forging and heating step comprises heating the electroslag ingot at 300 ℃ for Wen Zhuanglu hours, then heating to 1000-1100 ℃ at a heating rate of 80 ℃/h or less, preserving heat, and discharging and forging.
  8. 8. The method according to claim 7, wherein the forging forming includes cogging forging 4 to 5 times and forging is performed after the cogging forging, the forging is performed 3 to 4 times.
  9. 9. The method according to claim 3, wherein in the step S4, the annealing treatment of the forging stock comprises heating the forging stock to be Wen Zhuanglu at 600 ℃ for 4 hours, heating to 850+/-10 ℃ and preserving heat for 2 hours, cooling to 600 ℃ at a cooling speed of less than or equal to 30 ℃ per hour, preserving heat for 8 hours, and discharging and air cooling.
  10. 10. The method according to claim 3, wherein in the step S5, the solution heat treatment comprises charging the forging stock into a furnace at a temperature of 300 ℃ or more, then heating to 1000+ -10 ℃ and preserving heat for 2h, discharging and air cooling.

Description

Ferromagnetic damping alloy and preparation method thereof Technical Field The invention relates to the technical field of alloy preparation, in particular to a ferromagnetic damping alloy and a preparation method thereof. Background Damping alloys are functional materials that are capable of converting mechanical vibrational energy into thermal energy and achieving rapid damping. As early as 20 th century, feCr12Ni ferritic stainless steel was applied as a damping alloy to turbine blades, marking the materials as entering the engineering application stage. According to different damping mechanisms, the damping alloy mainly comprises a ferromagnetic type damping alloy, a dislocation type damping alloy, a complex phase type damping alloy, a variable crystal type damping alloy and the like, wherein the ferromagnetic type damping alloy mainly comprises an iron-based alloy and dissipates energy by means of irreversible movement of magnetic domains, and the ferromagnetic type damping alloy is widely applied to the fields of heavy machinery, rail transit, nuclear power cladding tubes and the like. In the existing ferromagnetic damping alloy, the Fe-Cr-Al series alloy is paid attention to because of good damping characteristic and certain corrosion resistance, the alloy is generally prepared by a duplex process of vacuum induction melting and electroslag remelting, and is prepared into a required material type through subsequent forging, annealing and other procedures, however, in the actual production and application processes, the series alloy still has a plurality of obvious defects, and further popularization and performance improvement are restricted: The coarse structure causes difficult ultrasonic detection and insufficient strength, the conventional Fe-Cr-Al damping alloy is usually a pure ferrite structure, coarse grains are easy to form in the preparation process, and the coarse grain structure not only causes serious signal attenuation of the material in ultrasonic detection and can not effectively implement internal defect detection, but also directly influences the mechanical property of the material, often causes lower strength and is difficult to meet the use requirement of a high-standard structural member. The damping performance and the mechanical performance of the alloy are difficult to be combined, the damping performance of the alloy depends on a heat treatment process, and the heat treatment at a higher temperature is favorable for improving the damping performance, but the further growth of crystal grains or precipitation of unfavorable phases can be caused at the same time, so that the mechanical performances such as strength, toughness and the like of the material are reduced. Therefore, the trade-off between damping performance and mechanical performance is often needed in process design, and the material state with high damping and excellent mechanical performance is difficult to obtain, so that the applicability of the material in high-end equipment is limited. Therefore, there is a need in the art for a ferromagnetic damping alloy and a method for preparing the same that can maintain excellent damping properties while having a fine grain structure, good mechanical properties and reliable process adaptability. Disclosure of Invention One of the technical problems to be solved by the invention is to provide a ferromagnetic damping alloy, so as to solve the problems of easy coarsening of ferrite grains, poor ultrasonic detection adaptability and easy low strength in the prior art. In order to overcome the defects in the prior art, the invention provides a ferromagnetic damping alloy, which comprises the following chemical components in percentage by mass: C：≤0.01%;Mn：≤0.01%;Cu：0.40-0.60%;P：≤0.01%;S：≤0.01%;Cr：12.00-13.50%;Al：1.00-3.00%;Re：0.09%;Zr：0.12%;O：≤0.010%;N：≤0.010%;H：≤0.00005%; The balance being Fe and other unavoidable impurities. Compared with the prior art, the ferromagnetic damping alloy has the advantages that the ferromagnetic damping alloy is prepared by matching and controlling the proportion of alloy elements such as Cu, cr, al and the like, introducing microalloying elements such as Re, zr and the like, and strictly limiting the content of impurities such as C, mn, P, S, O, N, H and the like, so that the risk of impurity and gas-induced inclusion, segregation and abnormal growth of crystal grains is obviously reduced on the basis of keeping a ferromagnetic damping mechanism (irreversible movement energy consumption of magnetic domains) of the alloy, and the purity and the structure uniformity of the alloy are improved from the source, wherein Zr and Re have synergistic effect on grain boundary and inclusion morphology, are beneficial to inhibiting the coarsening of the crystal grains and improving the structure stability, further improve the adaptability of ultrasonic inspection and improve the consistency of mechanical properties, reduce the adverse effects on the stren