CN115418577B - Seawater corrosion-resistant high-strength high-toughness damping alloy and preparation method thereof - Google Patents
Seawater corrosion-resistant high-strength high-toughness damping alloy and preparation method thereof Download PDFInfo
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- 238000013016 damping Methods 0.000 title claims abstract description 54
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 53
- 239000000956 alloy Substances 0.000 title claims abstract description 53
- 230000007797 corrosion Effects 0.000 title claims abstract description 36
- 238000005260 corrosion Methods 0.000 title claims abstract description 36
- 239000013535 sea water Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910052729 chemical element Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 238000005096 rolling process Methods 0.000 claims description 28
- 230000009467 reduction Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000003723 Smelting Methods 0.000 claims 1
- 229910000734 martensite Inorganic materials 0.000 abstract description 27
- 229910001566 austenite Inorganic materials 0.000 abstract description 15
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 14
- 229910002551 Fe-Mn Inorganic materials 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 230000009466 transformation Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000616 Ferromanganese Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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Abstract
The invention relates to a seawater corrosion resistant high-strength high-toughness damping alloy and a preparation method thereof, wherein the chemical components comprise the following components in percentage by weight: 0 to 0.025 percent of C, 15 to 27 percent of Mn, 1.0 to 2.5 percent of Al, 0 to 1.8 percent of Cr, 1.0 percent or more of Al+Cr is or less than 3.0 percent, 0.15 percent or less of Si, 0.005 percent or less of P, 0.002 percent or less of S, and the balance of iron and unavoidable trace chemical elements. The advantages are that: the proportion of austenite, epsilon-martensite and alpha' -martensite phases in the structure is regulated and controlled through heat treatment, and the alloy is kept by utilizing the austenite and epsilon-martensite, so that the alloy has good damping performance. The yield strength of the obtained high-strength high-toughness damping alloy resistant to seawater corrosion is more than or equal to 345MPa, the tensile strength is more than or equal to 700MPa, the elongation after fracture is more than or equal to 40%, and the seawater corrosion resistance is equivalent to that of CortenA steel.
Description
Technical Field
The invention belongs to the field of damping alloy production, and particularly relates to a seawater corrosion-resistant high-strength high-toughness damping alloy and a preparation method thereof.
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 key problem of limiting the application of the Fe-Mn-based damping alloy at present is that the corrosion resistance is poor, and the research and development of the high-strength, high-toughness, corrosion-resistant and vibration-resistant iron-based damping alloy with the sound attenuation and insulation functions has very important significance in realizing the structural-functional integration of the material.
In the prior art, the patent publication number is CN107699668A, which discloses a method for improving the corrosion resistance of the ferro-manganese damping alloy, and belongs to the field of damping alloy. The method can improve the corrosion resistance, but the treatment process is complex, the method is difficult to be applied to practical production in a large scale, and the ferrite layer on the surface can also influence the mechanical properties. The patent publication No. CN106011636A discloses a ferro-manganese-based high-strength and high-toughness damping alloy for ships, and the damping performance of the product is obviously superior to that of a common ship plate on the basis of ensuring that materials have good strength and toughness matching. However, the alloy strength of the invention is lower, the corrosion resistance of the damping alloy is not concerned, and the poor corrosion resistance of the Fe-Mn damping alloy greatly restricts the large-scale application of the damping alloy.
In the above patent, there are problems that the corrosion resistance is poor, the strength is low, and the method for improving the corrosion resistance is complicated.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a seawater corrosion resistant high-strength high-toughness damping alloy and a preparation method thereof, the proportion of austenite, epsilon-martensite and alpha' -martensite phases in a tissue is regulated and controlled through heat treatment,
through the addition of alloy elements and the adjustment of the process, the strength and corrosion resistance of the damping alloy are improved, and meanwhile, the good damping performance is ensured, the components and the process are simple, and the implementation is easy.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
the seawater corrosion resistant high-strength high-toughness damping alloy comprises the following chemical components in percentage by weight: 0 to 0.025 percent of C, 15 to 27 percent of Mn, 1.0 to 2.5 percent of Al, 0 to 1.8 percent of Cr, 1.0 percent or more of Al+Cr is or less than 3.0 percent, 0.15 percent or less of Si, 0.005 percent or less of P, 0.002 percent or less of S, and the balance of iron and unavoidable trace chemical elements.
The seawater corrosion resistant high-strength high-toughness damping alloy is smelted by adopting a converter or an electric furnace in turn, is cast by adopting continuous casting or casting, is rolled by adopting a rolling mill, and is subjected to heat treatment, and specifically comprises the following steps:
1) Rolling process
The continuous casting blank or the casting blank is put into a heating furnace for heating after being bloomed, the heating temperature is 1100-1200 ℃, the heat preservation time is 1-4 hours, rolling is carried out after heating, and the initial rolling temperature is 1050-1100 ℃; the rolling process of the heavy and medium plate mill comprises the following steps: rough rolling is carried out for 3-6 times, finish rolling is carried out for 5-10 times, the total rolling reduction of rough rolling is not lower than 70%, the total rolling reduction of finish rolling is not lower than 50%, the temperature after rough rolling is controlled at 900-1000 ℃, and the finish rolling finishing temperature is 700-850 ℃; finally air cooling or water cooling to room temperature;
2) Heat treatment of
The heat treatment and the heat preservation are carried out at 650-900 ℃ for 30-60 min; water-cooling to room temperature.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the proportion of austenite, epsilon-martensite and alpha '-martensite phases in a tissue is regulated and controlled through heat treatment, and the alloy is kept to have good damping performance by utilizing the austenite and epsilon-martensite, so that the alloy has higher strength by utilizing the alpha' -martensite. The invention has a wider heat treatment temperature process window, the yield strength of the obtained seawater corrosion resistant high-strength high-toughness damping alloy is more than or equal to 345MPa, the tensile strength is more than or equal to 700MPa, the elongation after fracture is more than or equal to 40%, the impact absorption power at minus 20 ℃ is more than or equal to 200J, the logarithmic decrement delta is more than or equal to 0.08, and the seawater corrosion resistance is equivalent to CortenA steel. The damping alloy can be widely applied to the fields of buildings, ships, engineering machinery and the like which simultaneously require vibration reduction, noise reduction and corrosion resistance.
The Fe-Mn damping alloy has damping performance, essentially because the alloy has lower fault energy, the alloy is not directly transformed into alpha 'martensite any more in the process of austenite transformation, but is transformed from austenite into epsilon martensite, and then from epsilon martensite into alpha' martensite, and in the transformation process, newly appeared epsilon martensite is nucleated through the expansion motion of incomplete dislocation, and further grows. Because of the special transformation process of epsilon martensite, when the epsilon martensite content in the structure is higher, the density of the corresponding incomplete dislocation is also higher, and the damping source of the Fe-Mn damping alloy has an important relation with the stacking fault energy even though the incomplete dislocation reciprocates. In the invention, the addition of Cr and Al elements can improve the stacking fault energy of the Fe-Mn damping alloy, so that the transformation from austenite to epsilon-martensite is more difficult, and more austenite structures are obtained in the structure, therefore, the addition of Cr and Al elements needs to be strictly controlled, and experiments prove that the addition of Cr and Al elements needs to be less than or equal to 3 percent (wt), so that the strength, damping and corrosion resistance of the Fe-Mn damping alloy can be balanced. The heat treatment process system has great influence on the structure of the Fe-Mn damping alloy, the proportion of austenite, epsilon-martensite and alpha ' -martensite in the structure is regulated and controlled by utilizing proper heat treatment temperature, the proper epsilon-martensite and austenite can better maintain the damping performance of the alloy, meanwhile, the existence of austenite ensures that the plasticity and low-temperature toughness of the alloy are both in higher level, the proper alpha ' -martensite ensures that the alloy has higher strength, and the cooperation of the austenite, epsilon-martensite and alpha ' -martensite in the structure can ensure that the strength, plasticity, low-temperature toughness and damping are all in higher level. In addition, the addition of Al and Cr elements is beneficial to improving the atmospheric corrosion resistance of the alloy, the rust layer on the surface of the alloy is better in compactness due to the addition of the Al element, and the addition of the Cr element is beneficial to improving the pitting corrosion resistance of the alloy and the seawater corrosion resistance of the Fe-Mn damping alloy.
The invention realizes the improvement of strength and corrosion resistance by adding corrosion-resistant alloy elements and proper heat treatment process, ensures plasticity and low-temperature toughness, and does not influence the damping performance of the alloy, thereby obtaining the Fe-Mn damping alloy with excellent comprehensive performance, and therefore, the invention has excellent application prospect in practical production.
Drawings
FIG. 1 is an EBSD-Phase diagram of example 1.
Fig. 2 is a graph of damping performance as a function of 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.
The chemical compositions of the examples and comparative examples are shown in Table 1, and CortenA steel was used as the comparative example. The two-stage rolling is adopted in the embodiment of the invention, and the specific preparation process is shown in table 2.
TABLE 1 list of chemical compositions and weight percent of examples and comparative examples of the present invention
As can be seen from FIG. 1, the structures of examples 1 to 4 were epsilon martensite, austenite and alpha 'martensite, and epsilon martensite and austenite were large and alpha' martensite was small in the structures.
TABLE 2 preparation process parameters for the various examples of the invention
TABLE 3 mechanical, damping, and Corrosion resistance test results list for various examples and comparative examples of the present invention
Note that: the corrosion experiment is a 28-day full-immersion corrosion experiment, and the test medium is 3.5% NaCl solution
Table 3 shows the performance test results of the embodiment of the invention and the comparative example, and from Table 3, the yield strength of the embodiment of the invention is above 345MPa, the elongation after break is above 40%, the low-temperature impact absorption power at-20 ℃ is above 200J, the logarithmic attenuation rate is above 0.08, and the invention has higher damping performance, meanwhile, the embodiment of the invention has the advantages of low corrosion rate and CortenA steel, seawater corrosion resistance equivalent to CortenA, performance completely meeting high strength, high toughness and high damping, and good corrosion resistance through 28-day full immersion simulation corrosion test. As can be seen from fig. 2, the damping performance of the example increases with the increase of the strain amplitude, while the damping performance of the comparative example has a small relationship with the strain amplitude, and the damping performance is very low.
Claims (1)
1. The seawater corrosion resistant high-strength high-toughness damping alloy is characterized by comprising the following chemical components in percentage by weight: 0 to 0.025 percent of C, 15 to 27 percent of Mn, 1.0 to 2.5 percent of Al, 0 to 1.8 percent of Cr, 1.0 percent or more of Al+Cr is or less than 3.0 percent, 0.15 percent or less of Si, 0.005 percent or less of P, 0.002 percent or less of S, and the balance of iron and unavoidable trace chemical elements;
the preparation method of the seawater corrosion-resistant high-strength high-toughness damping alloy sequentially adopts a converter or an electric furnace for smelting, adopts continuous casting or casting and rolling by a rolling mill, and adopts heat treatment, and specifically comprises the following steps:
1) Rolling process
The continuous casting blank or the casting blank is put into a heating furnace for heating after being bloomed, the heating temperature is 1100-1200 ℃, the heat preservation time is 1-4 hours, rolling is carried out after heating, and the initial rolling temperature is 1050-1100 ℃; the rolling process of the heavy and medium plate mill comprises the following steps: rough rolling is carried out for 3-6 times, finish rolling is carried out for 5-10 times, the total rolling reduction of rough rolling is not lower than 70%, the total rolling reduction of finish rolling is not lower than 50%, the temperature after rough rolling is controlled at 900-1000 ℃, and the finish rolling finishing temperature is 700-850 ℃; finally air cooling or water cooling to room temperature;
2) Heat treatment of
The heat treatment and the heat preservation are carried out at 650-900 ℃ for 30-60 min; water-cooling to room temperature.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5634990A (en) * | 1993-10-22 | 1997-06-03 | Woojin Osk Corporation | Fe-Mn vibration damping alloy steel and a method for making the same |
| JP3749922B2 (en) * | 2003-04-22 | 2006-03-01 | 学校法人東京理科大学 | High strength and high damping capacity Fe-Cr-Mn-Co alloy and method for producing the same |
| JP2007321243A (en) * | 2006-06-05 | 2007-12-13 | Tk Techno Consulting:Kk | HIGH-STRENGTH HIGH-DAMPING Fe-Mn-Cr-Ni ALLOY, MANUFACTURING METHOD THEREFOR, AND FORMED BODY THEREOF |
| CN102534366A (en) * | 2012-01-19 | 2012-07-04 | 浙江盾安机械有限公司 | Non-magnetic or weakly-magnetic high manganese steel balance block for compressor |
| KR101598499B1 (en) * | 2013-10-21 | 2016-03-02 | 연세대학교 산학협력단 | Steel having high strength and large ductility and method for manufacturing the same |
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