High-damping Fe-Mn alloy material and preparation method thereof

Abstract

The application discloses a kind of high-damping Fe-Mn series alloy materials, the component of alloy and the mass fraction of each component are as follows: Mn 16.5-17.5%, doping metal 0.5-0.8%, TiB2 0.02-0.03%, C0.01-0.015%, Si 0.015-0.02%, Fe remainder.The high-damping Fe-Mn series alloy material provided by the application, by optimizing the composition of alloy material and improving the process, using the method of combination of forging, stage solid solution and stage aging, the Fe-Mn series alloy material prepared has the comprehensive performance of high damping, high strength and good toughness;Add specific ratio of Ni, Zr, Mo doping metal and a small amount of TiB2, wherein, Ni improves the stacking fault energy, stabilizes austenite and solid solution strengthening, Zr and Mo form intermetallic compound to carry out precipitation strengthening and refine grain, TiB2 promotes grain refinement, C and Si affect the strength, plasticity and processing performance of alloy, synergistic effect of each element, the balance of high damping, high strength and good low-temperature toughness of Fe-Mn series alloy is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of damping alloy, and particularly relates to a high-damping Fe-Mn alloy material and a preparation method thereof. BACKGROUND

[0002] As a kind of functional materials, damping alloy has become the frontier of material science research. At present, the research based on damping alloy mainly focuses on two aspects of damping mechanism and damping performance. Among various kinds of damping alloys, Fe-Mn-based damping alloy has a wide application prospect in the fields of aerospace, petrochemical industry, transportation and energy due to its good internal friction performance, high strength and low price.

[0003] According to the conventional damping alloy design idea, the damping performance and the mechanical properties are difficult to be compromised, which makes the material be subjected to various constraints in the engineering application process, greatly limiting the development and application of new damping alloys. For example, dislocation type damping alloys represented by magnesium alloys have the characteristics of contradiction between damping and strength performance, and the damping performance is relatively high, but the strength is relatively low; for example, twinning type damping alloys represented by manganese copper alloy have strong temperature sensitivity, and are greatly affected by aging, and the damping performance will decrease obviously with the increase of time, and the corrosion resistance is also relatively poor; for example, Fe-Mn-based damping alloy also has high damping performance, compared with many damping alloys, the Fe-Mn-based damping alloy not only has good damping performance, but also has high strength, but the toughness needs to be further improved.

[0004] Chinese patent application CN107641769A discloses a wide strain amplitude high damping iron-based composite alloy and a preparation method thereof. The surface of the iron-based composite alloy provided by the invention is a ferrite layer, the core is austenite of face-centered cubic structure and martensite of close-packed hexagonal structure, and the weight percentage content of chromium in the surface ferrite layer is ≥4%. The specific method for preparing the iron-based composite alloy is as follows: first, an iron-manganese-chromium-based alloy with the weight percentage of each element content being Mn 12-25%, Cr 3-25%, Co 0-3%, Si 0-1%, Ti 0-1%, Nb 0-1%, Mg 0-1%, C 0-0.1%, N 0-0.1%, and the balance being Fe and inevitable impurities is treated at 900-1200°C for ≥15 minutes in a vacuum environment, then furnace-cooled to room temperature, and finally treated at 200-500°C for 2-48 hours and then furnace-cooled to room temperature. The alloy prepared by the method has good damping performance under wide strain amplitude, but the large amount of ferrite in the alloy makes the mechanical properties of the material poor, and the method has no deformation process, so it is only suitable for processing of individual parts and cannot be combined with the mainstream rolling deformation process of metal materials. Chinese patent application CN103898401A discloses a method for improving the damping performance of high-strength iron-manganese-based damping alloy, belonging to the field of damping alloys. The invention can significantly improve the damping performance of high-strength iron-manganese-based damping alloy, especially its damping performance under low strain amplitude. The weight percentage content of each element in the high-strength iron-manganese-based damping alloy described in the invention is as follows: Mn 15-23%, Co 0-3%, Si 0-1%, Cr 0-12%, Ti 0-1%, Mg 0-1%, C 0-0.1%, N 0-0.1%, and the balance being Fe and inevitable impurities. The specific method is as follows: first, the iron-manganese-based damping alloy is solid solution treated at 800-1100°C for 10 minutes to 2 hours, then aged at 50-400°C for 10 minutes to 10 hours, and finally deformed at room temperature by 1%-10%. However, the Fe-Mn damping alloy prepared by the method has low mechanical properties, with a yield strength of only 300 MPa.

[0005] Therefore, it is of great significance to develop a high-damping high-toughness Fe-Mn alloy material in the field. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a high-damping Fe-Mn alloy material and a preparation method thereof.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0008] A high-damping Fe-Mn alloy material, the composition of the alloy and the mass fraction of each component are as follows:

[0009] Mn 16.5-17.5%, doping metal 0.5-0.8%, TiB2 0.02-0.03%, C 0.01-0.015%, Si 0.015-0.02%, Fe balance.

[0010] Preferably, a high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0011] Mn 17-17.5%, doping metal 0.6-0.7%, TiB2 0.02-0.025%, C 0.012-0.015%, Si 0.015-0.018%, Fe balance.

[0012] Preferably, the doping metal is composed of Ni, Zr and Mo, and the mass ratio of the three is 6-8:2-3:1-2.

[0013] In the present application, Fe is used as the matrix, the Mn content is accurately controlled at 16.5-17.5% to obtain appropriate ε martensite phase change damping, and specific proportions of Ni, Zr, Mo doping metals and a small amount of TiB2 are added, wherein Ni increases the stacking fault energy, stabilizes austenite and solid solution strengthening, Zr and Mo form intermetallic compounds for precipitation strengthening and grain refinement, TiB2 promotes grain refinement, C and Si affect the strength, plasticity and processing performance of the alloy, and each element synergistically acts to achieve the balance of high damping, high strength and good toughness of the Fe-Mn alloy.

[0014] Preferably, the doping metal is composed of Ni, Zr and Mo, and the mass ratio of the three is 7:2.5:1.5.

[0015] The present application also protects a preparation method of a high-damping Fe-Mn alloy material as described above, comprising the following steps:

[0016] S1, the raw materials are weighed according to the proportion, mixed and then put into a vacuum induction furnace, and after vacuumizing, induction melting and casting are carried out under an argon protective atmosphere to obtain an alloy ingot;

[0017] S2, the alloy ingot in step S1 is forged to obtain a slab;

[0018] S3, the slab in step S2 is hot-rolled and cooled to room temperature after hot-rolling;

[0019] S4, the slab after hot-rolling in step S3 is subjected to solid solution treatment and aging treatment to obtain a heat-treated slab;

[0020] S5, the heat-treated slab in step S4 is subjected to cold rolling treatment and annealing treatment to obtain the high-damping Fe-Mn alloy material.

[0021] Preferably, the vacuum degree of the vacuum induction furnace in step S1 is 5x10 -3 Pa; the temperature of the induction melting is 1550-1600℃, and the holding time is 20-30min.

[0022] Preferably, the initial forging temperature of the forging in step S2 is 1150-1200℃, the final forging temperature is 900-950℃, and the water cooling after forging is performed.

[0023] In the present application, the alloy ingot is forged, the coarse grains in the as-cast structure are broken and refined, the defects such as shrinkage and porosity generated in the casting process are eliminated, the density and uniformity of the alloy are improved, and the orientation of the grains is changed, thereby creating conditions for obtaining better structure and performance in subsequent hot rolling and heat treatment.

[0024] Preferably, the initial temperature of the hot rolling in step S3 is 1050-1150℃, the final rolling temperature is 850-900℃, the total compression rate is ≥70%, and the air cooling or water cooling after rolling is performed.

[0025] In the present application, the hot rolling process is performed through plastic deformation at high temperature, thereby further refining the grains, improving the structure morphology, and improving the mechanical properties of the alloy, and the work hardening generated in the forging process can be eliminated during the hot rolling process, thereby preparing for the subsequent solid solution treatment.

[0026] Preferably, the solid solution treatment in step S4 is: first, the temperature is 850-900℃, the holding time is 1-2h, then the temperature is 950-1000℃, the holding time is 2-3h, and then the temperature is 1050-1100℃, the holding time is 1-2h, and the water quenching is performed after the solid solution; the aging treatment is: the temperature is 250-300℃, the holding time is 1-2h, then the temperature is 350-400℃, the holding time is 1-2h, and finally the temperature is 400-450℃, the holding time is 2-3h, and the furnace cooling is performed until the room temperature.

[0027] In the present application, in order to more effectively control the dissolution process of each phase in the alloy and obtain better structure and performance, the staged solid solution treatment is adopted, the staged solid solution treatment can obtain more uniform solid solution, reduce the grain growth, and reduce the thermal stress, thereby improving the comprehensive performance of the alloy; and the staged aging treatment is adopted, through the staged aging treatment, more fine and dispersed ε martensite and intermetallic compounds can be obtained, thereby improving the damping performance and other mechanical properties of the alloy.

[0028] Preferably, the total deformation amount of the cold rolling treatment in step S5 is 15%-25%, and the cold rolling is performed in multiple passes with small reduction; the temperature of the annealing treatment is 600-700℃, the holding time is 1-2h, and the air cooling is performed after the annealing.

[0029] In the present application, the slab after heat treatment is subjected to cold rolling and annealing treatment, the cold rolling introduces a certain amount of deformation, increases the dislocation density, improves the strength of the alloy, and through annealing treatment, part of the cold work hardening is eliminated, the hardness and toughness of the alloy are adjusted, at the same time, the annealing process can also promote the transformation of part of the residual austenite to epsilon martensite, further improve the damping performance of the alloy; the multi-pass small reduction cold rolling can avoid the cracking caused by single-pass large reduction, and ensure the smooth progress of the processing.

[0030] Compared with the prior art, the present application has the following beneficial effects:

[0031] (1) The high-damping Fe-Mn alloy material provided by the present application, through the optimization of the composition of the alloy material and the improvement of the process, adopts the method of combination of forging, staged solid solution and staged aging, so that the prepared Fe-Mn alloy material has the comprehensive performance of high damping, high strength and good toughness; taking Fe as the matrix, the Mn content is accurately controlled at 16.5-17.5% to obtain appropriate epsilon martensite phase transition damping, and specific proportion of Ni, Zr, Mo doped metals and a small amount of TiB2 are added, wherein, Ni improves the stacking fault energy, stabilizes austenite and solid solution strengthening, Zr and Mo form intermetallic compounds for precipitation strengthening and grain refinement, TiB2 promotes grain refinement, C and Si affect the strength, plasticity and processing performance of the alloy, the synergistic effect of each element realizes the balance of high damping, high strength and good low-temperature toughness of the Fe-Mn alloy.

[0032] (2) The high-damping Fe-Mn alloy material provided by the application can comprehensively control the dislocation energy, phase change behavior, microstructure and mechanical properties of the alloy by using specific proportions of Ni, Zr and Mo doped metals; Ni is an austenite forming element, which can increase the dislocation energy of the Fe-Mn alloy, and can be dissolved in the gamma phase and epsilon phase to produce a solid solution strengthening effect, thereby improving the strength of the alloy; if the content of Ni is too high, the gamma phase will be too stable, the content of epsilon martensite will be too low, the damping performance will decrease, and if the content of Ni is too low, the dislocation energy and the stability of the gamma phase cannot be effectively improved, and the improvement of the strength and low-temperature toughness is also limited; Zr can form intermetallic compounds with Fe, Mn, Ni and other elements, play a role in precipitation strengthening, and can pin dislocations and grain boundaries / phase boundaries to hinder their movement, thereby improving the strength and damping performance of the alloy; if the content of Zr is too high, too many intermetallic compounds will be formed, which may make the alloy brittle and reduce the toughness; if the content of Zr is too low, the intermetallic compounds cannot be effectively formed, and the effects of precipitation strengthening and grain refinement are not obvious; by controlling the content of Zr, the application can ensure the formation of a certain amount of intermetallic compounds to play a role in strengthening and refining grains, and avoid the embrittlement caused by excessive Zr; Mo cooperates with Ni, Zr and other elements in the formula, and can be precipitated in the form of fine and dispersed second phase particles in the alloy matrix during the aging treatment process; these dispersed second phase particles can effectively hinder the movement of dislocations; if the content of Mo is too low, the synergistic effect with Zr cannot be fully played, and the effects of precipitation strengthening and grain refinement will be affected; if the content of Mo is too high, too many intermetallic compounds will be formed, which will reduce the toughness and plasticity of the alloy and cause the alloy to become brittle; at the same time, Mo and Zr can act as heterogeneous nucleation points during the solidification and heat treatment of the alloy, promote grain refinement, and finer grains can improve the strength, low-temperature toughness and damping performance of the alloy, so that the prepared alloy has good comprehensive performance.

[0033] (3) The high-damping Fe-Mn alloy material provided by the application is prepared by formula-process synergy, and can be more finely controlled in terms of the microstructure and precipitated phase of the alloy through the following steps: stage solid solution treatment (850-900℃ for 1-2h→950-1000℃ for 2-3h→1050-1100℃ for 1-2h, water quenching) and stage aging treatment (250-300℃ for 1-2h→350-400℃ for 1-2h→400-450℃ for 2-3h, furnace cooling). The stage solid solution treatment can make various elements in the alloy more fully and uniformly dissolve into the solid solution, avoiding the problem of coarse grains caused by single-stage high-temperature solid solution. The stage aging treatment can more finely control the precipitation process of epsilon martensite and intermetallic compounds, forming a dispersed distribution of nanoscale precipitated phases. These precipitated phases can effectively pin dislocations and subgrain boundaries / phase boundaries, hinder their movement, improve the damping performance and strength of the alloy, and avoid the embrittlement caused by coarse precipitated phases, improving the low-temperature toughness of the alloy. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The SEM image of the fracture morphology of the Fe-Mn alloy material prepared in Example 1 of the application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0036] Example 1

[0037] A high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0038] Mn 17.3%, doping metal 0.7%, TiB2 0.025%, C 0.011%, Si 0.016%, Fe balance; the doping metal is composed of Ni, Zr and Mo with a mass ratio of 7:2.5:1.5.

[0039] A preparation method of a high-damping Fe-Mn alloy material, comprising the following steps:

[0040] S1, the raw materials are weighed according to the above proportions, mixed and then put into a vacuum induction furnace, and after vacuumizing to a vacuum degree of 5x10 - 3Pa, then fill in argon to 500 Pa, in the argon protective atmosphere, induction melting, temperature is 1580 ℃, holding time is 25 min, casting, get alloy ingot;

[0041] S2, the alloy ingot in step S1 is forged, the initial forging temperature is 1200 ℃, the final forging temperature is 950 ℃, water cooling after forging, get slab;

[0042] S3, the slab in step S2 is hot-rolled, the initial temperature is 1100 ℃, the final rolling temperature is 900 ℃, the total compression rate is ≥70%, air cooling or water cooling to room temperature after hot rolling;

[0043] S4, the slab after step S3 hot rolling is solid solution treated, first at a temperature of 880 ℃ for 1.5 h, then at a temperature of 980 ℃ for 2.5 h, then at a temperature of 1080 ℃ for 1.5 h, water quenching after solid solution; then aging treatment, at a temperature of 270 ℃ for 1.5 h, then at a temperature of 370 ℃ for 1.5 h, finally at a temperature of 420 ℃ for 2.5 h, furnace cooling to room temperature, get heat treatment slab;

[0044] S5, the heat treatment slab in step S4 is cold-rolled by using multi-pass small reduction, the total deformation is 20%, then annealing treatment, the annealing treatment temperature is 650 ℃, the holding time is 1.5 h, air cooling after annealing, get the high damping Fe-Mn alloy material.

[0045] Example 2

[0046] A high damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0047] Mn 17%, doping metal 0.6%, TiB2 0.023%, C 0.013%, Si 0.018%, Fe balance; the doping metal is composed of Ni, Zr and Mo with a mass ratio of 6.5:2.5:2.

[0048] A preparation method of a high damping Fe-Mn alloy material, comprising the following steps:

[0049] S1, the raw materials are weighed according to the above proportions, mixed and put into a vacuum induction furnace, vacuumized to a vacuum degree of 5×10 - 3 Pa, then fill in argon to 500 Pa, in the argon protective atmosphere, induction melting, temperature is 1580 ℃, holding time is 25 min, casting, get alloy ingot;

[0050] S2, the alloy ingot in step S1 is forged, the initial forging temperature is 1150 DEG C, the final forging temperature is 900 DEG C, and water cooling is carried out after forging to obtain a slab;

[0051] S3, the slab in step S2 is hot-rolled, the initial temperature is 1100 DEG C, the final rolling temperature is 870 DEG C, the total compression ratio is greater than or equal to 70%, and air cooling or water cooling is carried out after hot rolling to room temperature;

[0052] S4, the slab after hot rolling in step S3 is subjected to solid solution treatment, first heat preservation at a temperature of 870 DEG C for 1.5h, then heat preservation at a temperature of 970 DEG C for 2.5h, and then heat preservation at a temperature of 1070 DEG C for 1.5h, water quenching after solid solution, then aging treatment, heat preservation at a temperature of 270 DEG C for 1.5h, then heat preservation at a temperature of 370 DEG C for 1.5h, and finally heat preservation at a temperature of 430 DEG C for 2.5h, and furnace cooling to room temperature, to obtain a heat-treated slab;

[0053] S5, the heat-treated slab in step S4 is cold-rolled by using multiple passes with small reduction, and the total deformation is 20%, and then annealing treatment is carried out, the annealing temperature is 650 DEG C, and the heat preservation time is 1.5h, and the annealed slab is air cooled, to obtain the high-damping Fe-Mn alloy material.

[0054] Example 3

[0055] A high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0056] Mn 16.5%, doping metal 0.5%, TiB2 0.02%, C 0.01%, Si 0.015%, and Fe balance; the doping metal is composed of Ni, Zr and Mo with a mass ratio of 6:3:1.

[0057] A preparation method of a high-damping Fe-Mn alloy material, comprising the following steps:

[0058] S1, the raw materials are weighed according to the above proportions, mixed and then put into a vacuum induction furnace, vacuumized to a vacuum degree of 5*10 - 3 Pa, then argon is filled to 500 Pa, induction melting is carried out under the protection of argon atmosphere, the temperature is 1550 DEG C, the heat preservation time is 30 min, and casting is carried out, to obtain an alloy ingot;

[0059] S2, the alloy ingot in step S1 is forged, the initial forging temperature is 1150 DEG C, the final forging temperature is 900 DEG C, and water cooling is carried out after forging to obtain a slab;

[0060] S3, the slab in step S2 is hot-rolled, the initial temperature is 1050 DEG C, the final rolling temperature is 850 DEG C, the total compression ratio is greater than or equal to 70%, and air cooling or water cooling is carried out after hot rolling to room temperature;

[0061] S4, the slab after step S3 hot rolling is subjected to solid solution treatment, first at a temperature of 850℃ for 2h, then at a temperature of 950℃ for 3h, and then at a temperature of 1050℃ for 2h, and then water quenching after solid solution; then aging treatment at a temperature of 250℃ for 2h, then at a temperature of 350℃ for 2h, and finally at a temperature of 400℃ for 3h, and then furnace cooling to room temperature, to obtain a heat-treated slab;

[0062] S5, the heat-treated slab in step S4 is cold-rolled by using multi-pass small reduction, and the total deformation is 15%, and then annealing treatment is performed, and the annealing treatment temperature is 600℃, and the holding time is 2h, and then air cooling after annealing, to obtain the high-damping Fe-Mn alloy material.

[0063] Example 4

[0064] A high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0065] Mn 17.5%, doping metal 0.8%, TiB2 0.03%, C 0.015%, Si 0.02%, Fe balance; the doping metal is composed of Ni, Zr and Mo with a mass ratio of 8:2:2.

[0066] A preparation method of a high-damping Fe-Mn alloy material, comprising the following steps:

[0067] S1, the raw materials are weighed according to the above proportions, mixed and then put into a vacuum induction furnace, and after vacuumizing to a vacuum degree of 5x10 - 3 Pa, and then argon is filled to 500Pa, and then induction melting is performed under an argon protective atmosphere, the temperature is 1600℃, the holding time is 20min, and then casting is performed to obtain an alloy ingot;

[0068] S2, the alloy ingot in step S1 is subjected to forging, the initial forging temperature is 1200℃, the final forging temperature is 950℃, and then water cooling is performed after forging to obtain a slab;

[0069] S3, the slab in step S2 is subjected to hot rolling, the initial temperature is 1150℃, the final rolling temperature is 900℃, and the total compression ratio is ≥70%, and then air cooling or water cooling to room temperature is performed after hot rolling;

[0070] S4, the slab after step S3 hot rolling is subjected to solid solution treatment, first at a temperature of 900℃ for 1h, then at a temperature of 950℃ for 2h, and then at a temperature of 1100℃ for 1h, and then water quenching after solid solution; then aging treatment is carried out, at a temperature of 300℃ for 1h, then at a temperature of 400℃ for 1h, and finally at a temperature of 450℃ for 2h, and then furnace cooling to room temperature, to obtain a heat-treated slab;

[0071] S5, the heat-treated slab in step S4 is cold-rolled by using multi-pass small reduction, and the total deformation is 25%, and then annealing treatment is carried out, and the annealing treatment temperature is 700℃, and the holding time is 1h, and then air cooling after annealing, to obtain the high-damping Fe-Mn alloy material.

[0072] Comparative Example 1

[0073] A high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0074] Mn 17.3%, doping metal 0.7%, TiB2 0.025%, C 0.011%, Si 0.016%, Fe balance; the doping metal is composed of Ni, Zr and Mo with a mass ratio of 8:2.5:0.5.

[0075] A preparation method of a high-damping Fe-Mn alloy material, comprising the following steps:

[0076] S1, the raw materials are weighed according to the above proportions, mixed and then put into a vacuum induction furnace, and then vacuumized to a vacuum degree of 5x10 - 3 Pa, and then argon is filled to 500Pa, and then induction melting is carried out under an argon protective atmosphere, at a temperature of 1580℃ for 25min, and then casting is carried out, to obtain an alloy ingot;

[0077] S2, the alloy ingot in step S1 is subjected to forging, and the initial forging temperature is 1200℃, and the final forging temperature is 950℃, and then water cooling is carried out after forging, to obtain a slab;

[0078] S3, the slab in step S2 is subjected to hot rolling, and the initial temperature is 1100℃, and the final rolling temperature is 900℃, and the total compression rate is ≥70%, and then air cooling or water cooling to room temperature is carried out after hot rolling;

[0079] S4, the slab after step S3 hot rolling is subjected to solid solution treatment, first at a temperature of 880℃ for 1.5h, then at a temperature of 980℃ for 2.5h, and then at a temperature of 1080℃ for 1.5h, and then water quenching after solid solution; then aging treatment is carried out at a temperature of 270℃ for 1.5h, then at a temperature of 370℃ for 1.5h, and finally at a temperature of 420℃ for 2.5h, and then furnace cooling to room temperature, to obtain a heat-treated slab;

[0080] S5, the heat-treated slab in step S4 is cold-rolled by using multi-pass small reduction, and the total deformation is 20%, and then annealing treatment is carried out at a temperature of 650℃ for 1.5h, and then air cooling after annealing, to obtain the high-damping Fe-Mn alloy material.

[0081] Compared with example 1, the mass ratio of Ni, Zr and Mo in the alloy of the present comparative example is 8:2.5:0.5, and the content of Mo is low.

[0082] Comparative example 2

[0083] A high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0084] Mn 17.3%, doping metal 0.7%, TiB2 0.025%, C 0.011%, Si 0.016%, and Fe balance; the doping metal is composed of Ni, Zr and Mo with a mass ratio of 6:2.5:2.5.

[0085] A preparation method of a high-damping Fe-Mn alloy material, comprising the following steps:

[0086] S1, the raw materials are weighed according to the above proportions, mixed and then put into a vacuum induction furnace, and after vacuumizing to a vacuum degree of 5x10 - 3 Pa, and then argon is filled to 500Pa, and then induction melting is carried out under the protection of argon atmosphere, at a temperature of 1580℃ for 25min, and then casting is carried out, to obtain an alloy ingot;

[0087] S2, the alloy ingot in step S1 is subjected to forging, with an initial forging temperature of 1200℃ and a final forging temperature of 950℃, and then water cooling after forging, to obtain a slab;

[0088] S3, the slab in step S2 is subjected to hot rolling, with an initial temperature of 1100℃ and a final rolling temperature of 900℃, and the total compression rate is ≥70%, and then air cooling or water cooling to room temperature after hot rolling;

[0089] S4, the slab after step S3 hot rolling is subjected to solid solution treatment, first at a temperature of 880℃ for 1.5h, then at a temperature of 980℃ for 2.5h, and then at a temperature of 1080℃ for 1.5h, and then water quenching after solid solution; then aging treatment is carried out at a temperature of 270℃ for 1.5h, then at a temperature of 370℃ for 1.5h, and finally at a temperature of 420℃ for 2.5h, and then furnace cooling to room temperature, to obtain a heat-treated slab;

[0090] S5, the heat-treated slab in step S4 is cold-rolled by using multi-pass small reduction, and the total deformation is 20%, and then annealing treatment is carried out at a temperature of 650℃ for 1.5h, and then air cooling after annealing, to obtain the high-damping Fe-Mn alloy material.

[0091] Compared with example 1, the mass ratio of Ni, Zr and Mo in the alloy of the present comparative example is 6:2.5:2.5, and the Mo content is relatively high.

[0092] Comparative example 3

[0093] A high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0094] Mn 17.3%, 0.7% of doping metal, 0.025% of TiB2, 0.011% of C, 0.016% of Si, and the balance of Fe; the doping metal is composed of Ni, Zr and Mo with a mass ratio of 8:1.5:1.5.

[0095] A preparation method of a high-damping Fe-Mn alloy material, comprising the following steps:

[0096] S1, the raw materials are weighed according to the above proportions, mixed and then put into a vacuum induction furnace, and then vacuumized to a vacuum degree of 5x10 - 3 Pa, and then argon is filled to 500Pa, and then induction melting is carried out under the protection of argon atmosphere, the temperature is 1580℃, the holding time is 25min, and then casting is carried out, to obtain an alloy ingot;

[0097] S2, the alloy ingot in step S1 is subjected to forging, the initial forging temperature is 1200℃, the final forging temperature is 950℃, and then water cooling is carried out after forging, to obtain a slab;

[0098] S3, the slab in step S2 is subjected to hot rolling, the initial temperature is 1100℃, the final rolling temperature is 900℃, and the total compression ratio is ≥70%, and then air cooling or water cooling to room temperature is carried out after hot rolling;

[0099] S4, the slab after step S3 hot rolling is subjected to solid solution treatment, first at a temperature of 880℃ for 1.5h, then at a temperature of 980℃ for 2.5h, and then at a temperature of 1080℃ for 1.5h, and then water quenching after solid solution; then aging treatment is carried out at a temperature of 270℃ for 1.5h, then at a temperature of 370℃ for 1.5h, and finally at a temperature of 420℃ for 2.5h, and then furnace cooling to room temperature, to obtain a heat-treated slab;

[0100] S5, the heat-treated slab in step S4 is cold-rolled by using multi-pass small reduction, and the total deformation is 20%, and then annealing treatment is carried out at a temperature of 650℃ for 1.5h, and then air cooling after annealing, to obtain the high-damping Fe-Mn alloy material.

[0101] Compared with example 1, the mass ratio of Ni, Zr and Mo in the doped alloy is 8:1.5:1.5, and the content of Zr is low.

[0102] Comparative example 4

[0103] A high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0104] Mn 17.3%, doped metal 0.7%, TiB2 0.025%, C 0.011%, Si 0.016%, and Fe balance; the doped metal is composed of Ni, Zr and Mo with a mass ratio of 6:3.5:1.5.

[0105] A preparation method of a high-damping Fe-Mn alloy material, comprising the following steps:

[0106] S1, the raw materials are weighed according to the above proportions, mixed and then put into a vacuum induction furnace, and after vacuumizing to a vacuum degree of 5×10 - 3 Pa, and then argon is filled to 500Pa, and then induction melting is carried out under the protection of argon atmosphere, at a temperature of 1580℃ for 25min, and then casting is carried out, to obtain an alloy ingot;

[0107] S2, the alloy ingot in step S1 is subjected to forging, with an initial forging temperature of 1200℃ and a final forging temperature of 950℃, and then water cooling after forging, to obtain a slab;

[0108] S3, the slab in step S2 is subjected to hot rolling, with an initial temperature of 1100℃ and a final rolling temperature of 900℃, and the total compression rate is ≥70%, and then air cooling or water cooling to room temperature after hot rolling;

[0109] S4, the slab after step S3 hot rolling is subjected to solid solution treatment, first at a temperature of 880℃ for 1.5h, then at a temperature of 980℃ for 2.5h, and then at a temperature of 1080℃ for 1.5h, and then water quenching after solid solution; then aging treatment is carried out at a temperature of 270℃ for 1.5h, then at a temperature of 370℃ for 1.5h, and finally at a temperature of 420℃ for 2.5h, and then furnace cooling to room temperature, to obtain a heat-treated slab;

[0110] S5, the heat-treated slab in step S4 is cold-rolled by using multi-pass small reduction, and the total deformation is 20%, and then annealing treatment is carried out at a temperature of 650℃ for 1.5h, and then air cooling after annealing, to obtain the high-damping Fe-Mn alloy material.

[0111] Compared with example 1, the mass ratio of Ni, Zr and Mo in the doped alloy is 6:3.5:1.5, and the Zr content is relatively high.

[0112] Comparative example 5

[0113] A high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0114] Mn 17.3%, doped metal 0.7%, TiB2 0.025%, C 0.011%, Si 0.016%, and Fe balance; the doped metal is composed of Ni, Zr and Mo with a mass ratio of 7:2.5:1.5.

[0115] A preparation method of a high-damping Fe-Mn alloy material, comprising the following steps:

[0116] S1, the raw materials are weighed according to the above proportions, mixed and then put into a vacuum induction furnace, and after vacuumizing to a vacuum degree of 5×10 - 3 Pa, and then argon is filled to 500Pa, and then induction melting is carried out under the protection of argon atmosphere, at a temperature of 1580℃ for 25min, and then casting is carried out, to obtain an alloy ingot;

[0117] S2, the alloy ingot in step S1 is subjected to forging, with an initial forging temperature of 1200℃ and a final forging temperature of 950℃, and then water cooling after forging, to obtain a slab;

[0118] S3, the slab in step S2 is subjected to hot rolling, with an initial temperature of 1100℃ and a final rolling temperature of 900℃, and the total compression rate is ≥70%, and then air cooling or water cooling to room temperature after hot rolling;

[0119] S4, the slab after step S3 hot rolling is subjected to solid solution treatment, and is kept at a temperature of 1000 DEG C for 3h, and then is quenched in water; then is subjected to aging treatment, and is kept at a temperature of 270 DEG C for 1.5h, then is kept at a temperature of 370 DEG C for 1.5h, and finally is kept at a temperature of 420 DEG C for 2.5h, and is cooled to room temperature in a furnace, to obtain a heat-treated slab;

[0120] S5, the heat-treated slab in step S4 is cold-rolled by using multi-pass small reduction, and the total deformation is 20%, and then is subjected to annealing treatment, and the annealing treatment temperature is 650 DEG C, and the holding time is 1.5h, and then is cooled to room temperature after annealing, to obtain the high-damping Fe-Mn alloy material.

[0121] Compared with example 1, the present comparative example is treated by single-stage solid solution temperature during solid solution treatment.

[0122] Comparative example 6

[0123] A high-damping Fe-Mn alloy material, the components of the alloy and the mass fraction of each component are as follows:

[0124] Mn 17.3%, doping metal 0.7%, TiB2 0.025%, C 0.011%, Si 0.016%, Fe balance; the doping metal is composed of Ni, Zr and Mo with a mass ratio of 7:2.5:1.5.

[0125] A preparation method of a high-damping Fe-Mn alloy material, comprising the following steps:

[0126] S1, the raw materials are weighed according to the above proportions, mixed and then put into a vacuum induction furnace, and after vacuumizing, the vacuum degree is 5*10 - 3 Pa, and then argon is filled to 500 Pa, and then induction melting is carried out under the protection of argon atmosphere, the temperature is 1580 DEG C, and the holding time is 25 min, and then casting is carried out, to obtain an alloy ingot;

[0127] S2, the alloy ingot in step S1 is subjected to forging, the initial forging temperature is 1200 DEG C, the final forging temperature is 950 DEG C, and then is cooled in water after forging, to obtain a slab;

[0128] S3, the slab in step S2 is subjected to hot rolling, the initial temperature is 1100 DEG C, and the final rolling temperature is 900 DEG C, and the total compression rate is greater than or equal to 70%, and then is cooled to room temperature after hot rolling;

[0129] S4, the hot-rolled slab after step S3 is subjected to solid solution treatment, first at a temperature of 880℃ for 1.5h, then at a temperature of 980℃ for 2.5h, and then at a temperature of 1080℃ for 1.5h, and then water quenching after solid solution; then, aging treatment is carried out at a temperature of 400℃ for 3h, and furnace cooling to room temperature, to obtain a heat-treated slab;

[0130] S5, the heat-treated slab in step S4 is cold-rolled by using multi-pass small reduction, and the total deformation is 20%, and then annealing treatment is carried out, and the annealing temperature is 650℃, and the holding time is 1.5h, and then air cooling after annealing, to obtain the high-damping Fe-Mn alloy material.

[0131] Compared with Example 1, the present comparative example is treated by single-stage aging temperature during aging treatment.

[0132] The high-damping Fe-Mn alloy materials prepared by Examples 1-4 and Comparative Examples 1-4 are subjected to performance testing, the tensile properties are tested according to GB / T 228-2021 "Metallic Materials-Tensile Testing-Part 1: Method of Test at Room Temperature" on a WE300B tensile testing machine, the sample size is M16xφ10mm, 3 parallel samples are taken for each group, and the tensile strength R m and the yield strength R p0.2 of the material are tested respectively; the impact performance is tested according to GB / T 229-2020 "Metallic Materials Charpy Pendulum Impact Test Method" on a JBN-300 impact testing machine, the sample size is 10mmx10mmx55mm, V-shaped notch sample is used, the notch position is the cross section, the notch depth is 2mm, 3 parallel samples are taken for each group, the low-temperature impact energy of the material is tested, and the fiber ratio and side expansion data of the fracture are counted, the higher the fiber ratio, the more plastic deformation the material undergoes before fracture, and the more energy it can absorb, so the better the toughness, the larger the side expansion value, indicating that the crack propagation path of the material during impact fracture is more tortuous, and more energy is absorbed, so the better the toughness; the damping performance, the sample size is 60mmx8mmx1.5mm, taken from the cross section sample, the damping performance of the test material is tested by using a dynamic mechanical analyzer (DMA), 3 parallel samples are taken for each group, a double cantilever test mode is used, the loss tangent Tanδ value of the material under different frequencies (50Hz, 100Hz) at room temperature (25℃) is tested respectively, and the damping performance of the material is analyzed, the larger the value, the better the damping performance of the material. The test results are as follows in Table 1.

[0133] Table 1 Performance test results of Fe-Mn alloy materials of different examples and comparative examples

[0134]

[0135]

[0136] From Figure 1 The fracture micro-morphology is composed of equiaxed dimples of different sizes, indicating that the material is actually ductile fracture, and thus the material has high low-temperature toughness.

[0137] As can be seen from Table 1, the Fe-Mn alloy material prepared has good damping performance, meanwhile has high strength and toughness, excellent comprehensive performance, and good application prospect.

[0138] Although embodiments of the present application have been shown and described, it would be appreciated by those of ordinary skill in the art that changes, modifications, alternatives and variations to these embodiments could be made without departing from the principles and spirit of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-damping Fe-Mn-based alloy material, characterized by comprising: The components and mass fractions of the alloy are as follows: Mn 16.5-17.5%, doping metal 0.5-0.8%, TiB2 0.02-0.03%, C 0.01-0.015%, Si 0.015-0.02%, and Fe balance; The doping metal is composed of Ni, Zr and Mo, and the mass ratio of the three is 6-8:2-3:1-2; The preparation method of the high-damping Fe-Mn alloy material comprises the following steps: S1, the raw materials are weighed according to the proportion, mixed and then put into a vacuum induction furnace, and after vacuumizing, induction melting and casting are carried out under an argon protective atmosphere to obtain an alloy ingot; S2, the alloy ingot in step S1 is forged to obtain a slab; S3, the slab in step S2 is hot-rolled and then cooled to room temperature; S4, the slab after hot-rolling in step S3 is subjected to solid solution treatment and aging treatment to obtain a heat-treated slab; S5, the heat-treated slab in step S4 is subjected to cold-rolling treatment and annealing treatment to obtain the high-damping Fe-Mn alloy material. In step S4, the solid solution treatment is: first, heat preservation at a temperature of 850-900℃ for 1-2h, then heat preservation at a temperature of 950-1000℃ for 2-3h, and then heat preservation at a temperature of 1050-1100℃ for 1-2h, and water quenching after solid solution; the aging treatment is: heat preservation at a temperature of 250-300℃ for 1-2h, then heat preservation at a temperature of 350-400℃ for 1-2h, and finally heat preservation at a temperature of 400-450℃ for 2-3h, and furnace cooling to room temperature.

2. The high damping Fe-Mn based alloy material according to claim 1, characterized in that, The components and mass fractions of the alloy are as follows: Mn 17-17.5%, doping metal 0.6-0.7%, TiB2 0.02-0.025%, C 0.012-0.015%, Si 0.015-0.018%, and Fe balance.

3. The high damping Fe-Mn based alloy material according to claim 1, wherein The doping metal is composed of Ni, Zr and Mo, and the mass ratio of the three is 7:2.5:1.

5.

4. A method of producing the high damping Fe-Mn alloy material according to any one of claims 1 to 3, characterized by, The preparation method comprises the following steps: S1, the raw materials are weighed according to the proportion, mixed and then put into a vacuum induction furnace, and after vacuumizing, induction melting and casting are carried out under an argon protective atmosphere to obtain an alloy ingot; S2, the alloy ingot in step S1 is forged to obtain a slab; S3, the slab in step S2 is hot-rolled and then cooled to room temperature; S4, the slab after hot-rolling in step S3 is subjected to solid solution treatment and aging treatment to obtain a heat-treated slab; S5, the heat-treated slab in step S4 is subjected to cold-rolling treatment and annealing treatment to obtain the high-damping Fe-Mn alloy material.

5. The preparation method according to claim 4, characterized in that, The vacuum degree of the vacuum induction furnace in step S1 is 5x10 -3 Pa; the temperature of the induction melting is 1550-1600℃, and the holding time is 20-30 min.

6. The preparation method according to claim 4, characterized in that, In step S2, the forging temperature is 1150-1200℃, and the final forging temperature is 900-950℃, and the slab is water-cooled after forging.

7. The preparation method according to claim 4, characterized in that, In step S3, the hot-rolling starting temperature is 1050-1150℃, and the final rolling temperature is 850-900℃, and the total compression ratio is ≥70%, and the slab is air-cooled or water-cooled after hot-rolling.

8. The preparation method according to claim 4, characterized in that, The solution treatment in step S4 is: first, heat preservation at 850-900℃ for 1-2h, then heat preservation at 950-1000℃ for 2-3h, and then heat preservation at 1050-1100℃ for 1-2h, and water quenching after solution treatment; the aging treatment is: heat preservation at 250-300℃ for 1-2h, then heat preservation at 350-400℃ for 1-2h, and finally heat preservation at 400-450℃ for 2-3h, and furnace cooling to room temperature.

9. The preparation method according to claim 4, characterized in that, The total deformation of the cold rolling treatment in step S5 is 15%-25%, and the cold rolling is carried out by using multiple passes with small reduction; the annealing temperature is 600-700℃, and the heat preservation time is 1-2h, and the annealing is air cooling.

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