CN115323274B - Method for improving damping performance of high-strength high-toughness Fe-Mn damping alloy - Google Patents

Method for improving damping performance of high-strength high-toughness Fe-Mn damping alloy Download PDF

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CN115323274B
CN115323274B CN202211057188.4A CN202211057188A CN115323274B CN 115323274 B CN115323274 B CN 115323274B CN 202211057188 A CN202211057188 A CN 202211057188A CN 115323274 B CN115323274 B CN 115323274B
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赵刚
李琳
王学敏
李江文
侯华兴
李大航
陈义庆
代春朵
刘璇
王艺橦
伞宏宇
张弛
苏显栋
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Angang Steel Co Ltd
University of Science and Technology Beijing USTB
Ansteel Beijing Research Institute
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University of Science and Technology Beijing USTB
Ansteel Beijing Research Institute
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    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
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    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
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Abstract

The invention relates to a method for improving damping performance of a high-strength high-toughness Fe-Mn damping alloy, which comprises the steps of adding a certain amount of Ti and Nb elements in the smelting process of the Fe-Mn damping alloy, wherein the addition of the Nb and the Ti satisfies the following conditions in percentage by mass: 4C (wt%) +0.02% or less Ti+1/2Nb (wt%) +5.21C (wt%) +0.013%. The advantages are that: the carbide precipitation is formed by utilizing Ti and Nb and carbon elements in the Fe-Mn damping alloy, the solid solution quantity of the carbon elements in the damping alloy is reduced, the solubility of interstitial atoms in the crystal structure of the Fe-Mn damping alloy is reduced, the solubility of kohlrabi gas clusters is reduced, the obstruction of dislocation movement is reduced, and the resistance of reversible movement of incomplete dislocation is reduced, so that the damping performance of the Fe-Mn damping alloy is remarkably improved.

Description

Method for improving damping performance of high-strength high-toughness Fe-Mn damping alloy
Technical Field
The invention relates to a method for improving damping performance of a high-strength high-toughness Fe-Mn damping alloy.
Background
With the development of modern science and technology, the control of vibration, impact and noise is becoming a complex and urgent problem, so that research on vibration damping and noise reduction technology is attracting general attention of many departments, especially in the fields of navigation, aerospace, aviation, nuclear industry and the like. Damping alloys, which are all developed under such conditions, are alloys that have the strength of the structural material and are able to convert vibrational energy into heat energy by a damping process (internal consumption) relatively quickly. In recent years, many efforts are made in this field in China, and tens of damping alloys have been developed, so that an emerging field of functional materials is formed. The damping alloy can be used for vibration reduction and noise reduction in the fields of military engineering, aerospace, construction, ships, automobiles, engineering machinery and the like.
The Fe-Mn-based alloy is a novel damping alloy developed in more than ten years, has the highest strength (tensile strength is more than 700 MPa) and the lowest cost (only 1/4 of Mn-Cu damping alloy), has damping performance which increases with the increase of strain amplitude, and is not influenced by an external magnetic field. Such alloys are well suited for use in components that are subject to large vibrations and impacts. The Fe-Mn damping alloy is used as an iron-based material with high Mn, ferromanganese is often used as a raw material for smelting in actual production, so that a certain content of carbon element is inevitably present in the alloy, and the carbon element obviously reduces the damping performance of the Fe-Mn damping alloy, and therefore, the research on reducing the carbon content in the Fe-Mn damping alloy and improving the damping performance of the carbon-containing Fe-Mn damping alloy is significant.
In the prior art, the patent publication number is CN103898401A, a method for improving the damping performance of a high-strength ferro-manganese-based damping alloy is disclosed, belongs to the field of damping alloys, and can remarkably improve the damping performance of the high-strength ferro-manganese-based damping alloy, in particular to the damping performance under low strain amplitude. The specific method comprises the following steps: firstly, carrying out solution treatment on the ferromanganese-based damping alloy at 800-1100 ℃ for 10 minutes-2 hours, then carrying out aging treatment at 50-400 ℃ for 10 minutes-10 hours, and finally deforming at room temperature by 1-10%. The method starts from a heat treatment process and a deformation process, improves the damping performance of the damping alloy, but has relatively complex treatment process and relatively large limitation. Patent publication No. CN106282786A discloses a Nb-containing iron-manganese-based damping alloy and a preparation method thereof, wherein the method ensures that the maximum damping loss factor tan delta of Fe-17Mn alloy reaches 0.055, the temperature range of high damping reaches 25-330 ℃, and meanwhile, the room temperature tensile strength reaches 691-834 MPa, and the elongation rate is 15.7-22.6%. The method utilizes arc melting to obtain the high-purity Fe-Mn damping alloy, but the arc melting preparation material has small size and great limitation, and the process is difficult to be applied to actual production.
In the above-mentioned published patent, no carbon element exists in the alloy components, however, in the practical production of the Fe-Mn damping alloy, it is difficult to avoid the incorporation of a considerable carbon element, and it is known that the solid solution of the carbon element in the Fe-Mn damping alloy will greatly reduce the damping performance thereof.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for improving the damping performance of a high-strength high-toughness Fe-Mn damping alloy, which is simple and easy to realize, and is suitable for producing the Fe-Mn damping alloy with higher C content.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
a method for improving damping performance of high-strength high-toughness Fe-Mn damping alloy is characterized in that a certain amount of Ti and Nb elements are added in the smelting process of the Fe-Mn damping alloy, so that C element in the alloy and Ti and Nb form strong carbide precipitation, and the addition of Nb and Ti is as follows in percentage by mass:
4C(wt％)+0.02％≤Ti+1/2Nb(wt％)≤5.21C(wt％)+0.013％。
the Fe-Mn damping alloy comprises the following chemical components in percentage by mass: 0.01 to 0.4 percent of C, 13 to 27 percent of Mn, less than or equal to 0.25 percent of Si, less than or equal to 0.015 percent of P, less than or equal to 0.012 percent of S, and the balance of iron and unavoidable trace chemical elements.
In the rolling process of the Fe-Mn damping alloy, the final rolling temperature is above 950 ℃, water cooling is adopted after rolling, and the temperature is quickly cooled to room temperature; in the tempering treatment of the Fe-Mn damping alloy, the tempering temperature is 80-600 ℃, and the heat preservation time is 5-240 min.
Compared with the prior art, the invention has the beneficial effects that:
carbon element is often used as a clearance atom in a metal material, and is also a clearance atom in a Fe-Mn damping alloy crystal structure, the clearance atom can cause slight lattice distortion in the crystal structure and is easy to be biased around dislocation, so that a Korotkoff gas group is formed, and the Korotkoff gas group has obvious blocking effect on dislocation movement. The damping mechanism of the Fe-Mn damping alloy is mainly reciprocating motion of the Shokrill incomplete dislocation, and mechanical energy is converted into internal energy to be dissipated, so that the mobility of the incomplete dislocation is a key factor of damping performance of the Fe-Mn damping alloy, however, in the dislocation motion process, a Kelvin air mass can play a role in pinning to block the dislocation motion, so that the damping performance of the Fe-Mn damping alloy is obviously reduced.
According to the invention, carbide precipitation is formed by utilizing Ti and Nb and carbon elements in the Fe-Mn damping alloy, the solid solution quantity of the carbon elements in the damping alloy is reduced, the solubility of interstitial atoms in the crystal structure of the Fe-Mn damping alloy is reduced, the solubility of kohlrabi gas clusters is reduced, the obstruction of dislocation movement is reduced, and the resistance of reversible movement of incomplete dislocation is reduced, so that the damping performance of the Fe-Mn damping alloy is remarkably improved. According to the invention, through the addition of strong carbides Nb and Ti, the solid solution concentration of carbon elements in the alloy is reduced, and the precipitation of NbC and TiC is obtained, so that the damping performance of the Fe-Mn damping alloy is improved, and the strength of the alloy is also improved. The addition of Nb and Ti can be completed in the smelting process of the alloy, the realization is simple, and the damping performance is obviously improved.
Drawings
Fig. 1 is a graph of damping performance versus strain amplitude for the examples and comparative examples.
Detailed Description
The present invention will be described in detail below with reference to the drawings of the specification, but it should be noted that the practice of the present invention is not limited to the following embodiments.
A method for improving damping performance of high-strength high-toughness Fe-Mn damping alloy comprises the following chemical components in percentage by mass: 0.01 to 0.4 percent of C, 13 to 27 percent of Mn, less than or equal to 0.25 percent of Si, less than or equal to 0.015 percent of P, less than or equal to 0.012 percent of S, and the balance of iron and unavoidable trace chemical elements. In the smelting process of the Fe-Mn damping alloy, adding a certain amount of Ti and Nb elements to enable C element in the alloy to form strong carbide precipitation with Ti and Nb, wherein the addition of Nb and Ti is as follows by mass percent:
4C(wt％)+0.02％≤Ti+1/2Nb(wt％)≤5.21C(wt％)+0.013％
the formula not only considers the content of Ti and Nb elements required for forming strong carbide, but also includes N elements which are inevitably mixed in during smelting and other factors which possibly cause Ti and Nb element loss by using practical test inspection. The addition amount of Ti and Nb elements meeting the formula can lead the C element in the alloy to be completely precipitated in the form of strong carbide, and the C element is not dissolved in an alloy structure any more, thereby reducing the influence of the C element on the damping performance of the alloy to the greatest extent.
In the rolling process of the Fe-Mn damping alloy, the final rolling temperature is higher than 950 ℃, water cooling is adopted after rolling, and the temperature is quickly cooled to room temperature. Rolling above the temperature of the austenite complete recrystallization region, and then rapidly cooling to room temperature, thereby being capable of obtaining tiny equiaxial austenite grains, being beneficial to the damping performance of the alloy, and being capable of reducing the aggregation-like precipitation of carbide at defects such as dislocation in the rolling and cooling processes of the non-recrystallization region. In the tempering treatment of the Fe-Mn damping alloy, the tempering temperature is 80-600 ℃, and the heat preservation time is 5-240 min. The tempering process can be favorable for carbide in the alloy to be evenly dispersed and separated out in the structure, so that the strength of the damping alloy can be effectively improved, and the influence of the element C on the damping performance of the alloy can be reduced.
The chemical compositions of the Fe-Mn damping alloy of the examples and the comparative examples are shown in Table 1, and the preparation process parameters of the examples and the comparative examples of the invention are shown in Table 2, and the performance detection results of the examples and the comparative examples are shown in Table 3.
TABLE 1 list of chemical compositions and weight percent of examples and comparative examples of the present invention
Figure BDA0003825661030000031
Examples 1 to 4 were added with Nb and Ti elements, whereas comparative examples were not added with Nb and Ti elements.
Table 2 preparation process parameters of each of examples and comparative examples of the present invention
Figure BDA0003825661030000041
TABLE 3 mechanical and damping test results for the examples and comparative examples of the invention
Figure BDA0003825661030000042
As can be seen from Table 3, in examples 1 to 4, by adding Nb and Ti strong carbide elements, the damping performance is remarkably improved, and the strength of the alloy is remarkably improved. Furthermore, as can be seen from fig. 1, the damping performance of the embodiment of the present invention increases with increasing strain, and is much higher than that of the comparative example.

Claims (1)

1. A method for improving damping performance of a high-strength high-toughness Fe-Mn damping alloy is characterized in that a certain amount of Ti and Nb elements are added in the smelting process of the Fe-Mn damping alloy, so that C element in the alloy and Ti and Nb form strong carbide to be separated out, and the addition of Nb and Ti is as follows in percentage by mass:
4C(wt％)+0.02％≤Ti+1/2Nb(wt％)≤5.21C(wt％)+0.013％；
the Fe-Mn damping alloy comprises the following chemical components in percentage by mass: 0.01 to 0.4 percent of C, 13 to 27 percent of Mn, less than or equal to 0.25 percent of Si, less than or equal to 0.015 percent of P, less than or equal to 0.012 percent of S, and the balance of iron and inevitable trace chemical elements;
in the rolling process of the Fe-Mn damping alloy, the final rolling temperature is above 950 ℃, water cooling is adopted after rolling, and the temperature is quickly cooled to room temperature; in the tempering treatment of the Fe-Mn damping alloy, the tempering temperature is 80-600 ℃, and the heat preservation time is 5-240 min.
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US4204888A (en) * 1975-05-19 1980-05-27 The Foundation: The Research Institute Of Electric And Magnetic Alloys High damping capacity alloy
KR102098501B1 (en) * 2018-10-18 2020-04-07 주식회사 포스코 High-manganese steel having excellent vibration-proof properties and formability, and method for manufacturing thereof

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