CN115354241A - Low-temperature wear-resistant alloy with synergistically improved strong plasticity and preparation method thereof - Google Patents

Low-temperature wear-resistant alloy with synergistically improved strong plasticity and preparation method thereof Download PDF

Info

Publication number
CN115354241A
CN115354241A CN202211064086.5A CN202211064086A CN115354241A CN 115354241 A CN115354241 A CN 115354241A CN 202211064086 A CN202211064086 A CN 202211064086A CN 115354241 A CN115354241 A CN 115354241A
Authority
CN
China
Prior art keywords
alloy
temperature
low
preparation
plasticity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202211064086.5A
Other languages
Chinese (zh)
Other versions
CN115354241B (en
Inventor
李小琳
李乾
郝晓晓
赵利媛
李雅婷
王海丰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northwestern Polytechnical University
Original Assignee
Northwestern Polytechnical University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northwestern Polytechnical University filed Critical Northwestern Polytechnical University
Priority to CN202211064086.5A priority Critical patent/CN115354241B/en
Publication of CN115354241A publication Critical patent/CN115354241A/en
Application granted granted Critical
Publication of CN115354241B publication Critical patent/CN115354241B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • 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
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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
    • C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The invention provides a low-temperature wear-resistant alloy with synergistically improved strong plasticity and a preparation method thereof, wherein the alloy comprises the following components in atomic ratio: 45% -55%, mn:25% -35%, co:5% -15%, cr:5% -15%, C:0.5% -1.5%, ti:0.5% -1.5%. The preparation of the alloy comprises the following steps: weighing corresponding elements according to the proportion of alloy elements, smelting and casting for many times in a vacuum induction smelting furnace, then carrying out heat preservation and hot rolling for many times in steps at 1150-1250 ℃, carrying out cold rolling processing with the reduction rate of 60% after cooling, and then carrying out final heat treatment and quenching on the alloy within the temperature range of 650-900 ℃. According to the invention, through the addition of C, ti and the proper heat treatment process, the alloy shows excellent strong plasticity matching and good low-temperature wear resistance. The method is favorable for promoting the application of the face-centered cubic high-entropy alloy in engineering practice.

Description

Low-temperature wear-resistant alloy with strong plasticity synergistically improved and preparation method thereof
Technical Field
The invention belongs to the technical field of high-strength wear-resistant alloys, and particularly relates to a preparation method of a low-temperature wear-resistant alloy with synergistically improved strong plasticity.
Background
High entropy alloys are essentially distinguished from conventional alloys, which are typically designed based on one primary element, and alloys are typically composed of at least five primary elements in near-equal atomic ratios. High entropy alloys exhibit excellent mechanical properties such as high strength, excellent radiation resistance, wear resistance and corrosion resistance, and have therefore attracted extensive attention in the past decade.
The FeMnCoCr series high-entropy alloy matrix phase is an FCC-gamma phase, in order to further improve the strength and plasticity, the concept of 'metastable engineering' is tried to be applied to the high-entropy alloy in recent years, and the phase transformation induced two-phase high-entropy alloy is designed by a metastable engineering method, so that the phase transformation can be induced to further induce the plasticity effect, and the competitive relation between the shaping and the strength is overcome. However, the strength, hardness and the like of the FeMnCoCr high-entropy alloy are not satisfactory, and the yield strength is usually only 200 to 300 MPa, which also becomes an important factor for limiting the engineering application of the FeMnCoCr high-entropy alloy. Second phase strengthening is considered to be an effective and economical method for improving the mechanical properties of the alloy, and the effect of the second phase strengthening depends on the influence of second phase particles on the microstructure of the alloy and the resistance to dislocation movement.
The material not only needs to work in a normal temperature environment, but also needs to be in service in extreme environments such as low temperature, high temperature and the like. At present, with the annual increase of the cargo capacity of polar ships and the rise of the fields of extraterrestrial planet detection, gas industry and the like, the demand for high-performance low-temperature materials is more and more urgent.
In addition, wear due to friction is considered to be the primary cause of mechanical equipment failure, with approximately 80% of part damage due to various forms of wear. However, the current research on the friction and wear properties of high-entropy alloy mainly focuses on room temperature and high temperature environment, and the friction and wear properties and mechanism at low temperature are still little known. The FeMnCoCr series high-entropy alloy is considered by extensive researchers to have good low-temperature mechanical properties, but the friction characteristic of the FeMnCoCr series high-entropy alloy under the low-temperature working condition is still a problem to be solved urgently.
Based on the above, the low-temperature wear-resistant alloy with the synergistic improvement of the strong plasticity and the preparation method thereof are provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the low-temperature wear-resistant alloy with the strong plasticity promoted synergistically and the preparation method thereof.
The alloy is rubbed at low temperature, and because the temperature causes the reduction of the stacking fault energy, the alloy is more easily subjected to martensite phase transformation from FCC-gamma phase to HCP-epsilon phase at low temperature, further HCP phase is generated, and HCP phase with higher hardness prevents the alloy from further abrasion.
The technical scheme adopted by the invention is as follows: the low-temperature wear-resistant alloy with the synergistically improved strong plasticity comprises the following alloy components in atomic ratio:
Fe：45%~55%；
Mn：25%~35%；
Co：5%~15%；
Cr：5%~15%；
C：0.5%~1.5%；
Ti：0.5%~1.5%。
a preparation method of a low-temperature wear-resistant alloy with synergistically improved strong plasticity comprises the following steps:
determining the quality of Fe, mn, co, cr, C and Ti elements according to the design target components of the alloy, weighing the elements for later use after cleaning the elements by absolute ethyl alcohol, then selecting a vacuum induction melting method, sequentially melting and casting the Fe, co, cr, C, ti and Mn elements at high temperature under the protection of inert gas to obtain an alloy ingot, keeping the temperature of the alloy ingot, rolling the alloy ingot to obtain an alloy plate, then cold-rolling the alloy plate to obtain an alloy crude product, finally carrying out final heat treatment on the alloy crude product in a heat treatment furnace at 650 to 900 ℃, keeping the temperature for 1 h, and then carrying out water quenching to obtain the high-entropy alloy with the target components.
Further, the vacuum induction smelting is to add Fe, co and Cr elements along with a vacuum induction furnace, carry out vacuum refining for 10 min, add C, ti and Mn elements, fill inert gas for protection, smelt for 3-5 min, and carry out high-temperature casting at 1600-1700 ℃ to obtain an alloy ingot.
Further, the alloy plate obtained by rolling is subjected to heat preservation of 7 h at 1150-1250 ℃, namely, the alloy ingot is subjected to rough rolling with the reduction rate of 97% for 9 passes to be mm thick, then the rough rolled alloy plate is subjected to heat preservation of 30 h at 1150-1250 ℃, and is subjected to asynchronous rolling with the reduction rate of 97% for 3 passes to be 3 mm thick, and finally, the alloy plate is air-cooled to room temperature, so that the alloy plate after hot rolling is obtained.
Further, the alloy crude product is obtained by removing oxide skin on the surface of the alloy plate, and cold rolling the alloy plate at a reduction ratio of 60% to ensure that the final thickness of the alloy plate is about 1.1 to 1.3 mm.
C. The addition of Ti element enables the high-entropy alloy matrix structure to present an FCC phase single-phase structure; in the high-entropy alloy, C, ti atoms exist in the alloy in the form of interstitial solid solution and formation of a nano TiC precipitated phase; the high-entropy alloy has low stacking fault energy, and can generate martensite phase transformation from an FCC phase to an HCP phase under the action of external force; the high-entropy alloy has the advantages that the stacking fault energy is reduced at low temperature, the alloy is more easily subjected to the martensite phase transformation from FCC (fluid catalytic cracking) phase to HCP (hydrogen-phosphate) phase in the friction process at low temperature, and the low-temperature wear resistance of the alloy is improved
Compared with the prior art, the invention has the following advantages:
1. compared with FeMnCoCr alloy without any strengthening element, the C, ti element used as an FCC phase stable element properly improves the stacking fault energy of the alloy, so that the alloy is converted into a single FCC phase structure characteristic from the dual-phase structure characteristic of an FCC phase and an HCP phase at room temperature. But still retains the stress-induced transformation properties of the alloy that allow the martensitic transformation of the FCC phase to the HCP phase to occur under external forces. Further, the reduction of HCP content in the alloy matrix structure provides more space for the phase transformation of FCC phase to HCP phase, thereby compensating the plasticity loss which may be caused by the second phase particles while improving the strength of the alloy. In addition, the C, ti element is added, so that the grain refinement of the alloy is effectively realized, and the formed nano-scale TiC second phase particles can improve the alloy strength due to the obstruction of dislocation motion.
2. The invention provides a manufacturing process for improving the mechanical property of an alloy. The heat preservation and hot rolling process greatly reduces the energy consumption in the alloy forming process, effectively crushes and refines the coarse as-cast crystal grains, and obviously reduces or eliminates the casting defects such as shrinkage cavity, cracks and the like in the as-cast alloy. The cold rolling and annealing process further refines the alloy grains, and enables the alloy structure to show equiaxed grains, thereby avoiding the limitation of the anisotropic effect on the application of the alloy. Different annealing temperatures provide choices for the exploration of the optimal heat treatment parameters for the alloy.
3. The low-temperature wear-resistant alloy with the synergistically improved strong plasticity provided by the invention has the advantage that the mechanical property at room temperature is obviously improved. The entanglement and bearing effect on dislocation and an Orowan mechanism provided by the nano TiC precipitated phase during deformation contribute to the remarkable improvement of the alloy strength; and in the phase transformation process, the alloy has martensite phase transformation from FCC phase to HCP phase due to the lower stacking fault energy, so that the strength of the alloy is improved without obvious plasticity loss. Thereby leading the alloy to show excellent comprehensive mechanical property with strong plasticity and cooperative promotion.
4. The low-temperature wear-resistant alloy with the synergistically improved strong plasticity has excellent wear resistance at low temperature. Because TiC has the characteristic of obvious high hardness, the TiC is uniformly distributed in an alloy structure in a nanoscale size, and the wear resistance of the alloy is obviously improved. In addition, the alloy has the characteristic that the stacking fault energy is reduced along with the reduction of the temperature, and the martensite transformation from the FCC phase to the HCP phase is more easily generated under the action of external force in the low-temperature environment. The HCP phase has the property of higher hardness, which causes the alloy to exhibit "harder to wear" properties at low temperatures.
Drawings
FIG. 1 is a scanning electron microscopy SEM image of the microstructure of the target strong plasticity synergistic enhanced low temperature wear resistant alloy prepared by examples 1-3 provided by the invention;
wherein, a is the SEM image of example 1;
b is the SEM image of example 2;
c is the SEM image of example 3;
FIG. 2 is a tensile engineering stress-engineering strain curve of the target high-plasticity synergistically improved low-temperature wear-resistant alloy prepared in example 1, example 2 and example 3;
FIG. 3 is a graph of wear rates of the target high plasticity synergistic improvement low temperature wear resistant alloys prepared in examples 1, 2 and 3 provided by the invention in the environments of 0 ℃, -40 ℃, -80 ℃, -120 ℃;
FIG. 4 is a three-dimensional profile of wear scar of alloy prepared in example 3 at 0 ℃, -40 ℃, -80 ℃, -120 ℃ provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1, the present invention provides a technical solution: a preparation method of a low-temperature wear-resistant alloy with strong plasticity synergistically improved;
the alloy composition can be expressed as follows according to molar ratio: fe:45% -55%, mn:25% -35%, co:5% -15%, cr:5% -15%, C:0.5% -1.5%, ti:0.5% -1.5%.
The preparation method comprises the following steps:
s1, preparing raw materials, namely preparing alloy element raw materials with the purity of more than 99.9%, comprehensively cleaning the raw materials by using absolute ethyl alcohol as a cleaning medium, and drying for later use to eliminate the influence of impurity components on the alloy composition. Then, according to the design components of the alloy, 50 kg of Fe, mn, co, cr, C and Ti are weighed for later use. Wherein the manganese element needs to be called 1~3% in molar ratio so as to offset the influence of the volatilization of the Mn element on the alloy composition in the smelting process.
S2, smelting and casting. The vacuum induction melting furnace is firstly cleaned completely, so that cleanness and cleanness of the vacuum induction melting furnace are guaranteed, and influence of impurity elements on alloy composition is avoided. And then, adding Fe, co and Cr elements along with a furnace, vacuumizing until the vacuum degree is 0.08 to 0.10 MPa, starting an induction current switch, heating until all the alloy elements are completely melted, starting an electromagnetic stirring device, and refining for 10 min. Cooling, adding C, ti and Mn elements, vacuumizing, introducing argon as protective atmosphere, starting induction current, and smelting for 3-5 times (each time for 3-5 min) to uniformly distribute the alloy elements. And finally, casting at high temperature of 1600-1700 ℃ to obtain an alloy cast ingot.
And S3, rolling. The alloy ingot is preserved at 1150-1250 ℃ for 7 h, and then immediately hot rolled for 9 times until the thickness of the alloy plate is 12 mm. And then preserving the temperature of the alloy at 1150-1250 ℃ for 30 h, immediately carrying out 3-pass asynchronous rolling to the thickness of 3 mm, and air-cooling to the room temperature. And removing oxide skin on the surface of the alloy plate by acid pickling, performing cold rolling on the alloy plate with the reduction rate of 60%, and then performing cold rolling on the alloy plate to the thickness of 1.1 to 1.3 mm to obtain an alloy crude product.
And S4, heat treatment. Cutting the alloy plate into three equal parts by using a wire-cut electric discharge machine, taking one part of the three equal parts, annealing the alloy plate with 1 h in an annealing furnace at the temperature of 650 ℃, and then cooling the alloy plate with water to obtain the high-entropy alloy 1 with the target component.
Embodiment 2, the present invention provides a technical solution: a preparation method of a low-temperature wear-resistant alloy with strong plasticity synergistically improved;
the alloy composition can be expressed as follows according to molar ratio: fe:45% -55%, mn:25% -35%, co:5% -15%, cr:5% -15%, C:0.5% to 1.5% C, ti:0.5% -1.5%.
S1, preparing raw materials. Preparing alloy element raw materials with the purity of more than 99.9 percent, comprehensively cleaning the raw materials by using absolute ethyl alcohol as a cleaning medium, and drying for later use to eliminate the influence of impurity components on the alloy composition. Then, according to the design components of the alloy, 50 kg total elements of Fe, mn, co, cr, C and Ti are weighed for later use. Wherein the manganese element is called 1~3% in molar ratio so as to offset the influence of the volatilization of the Mn element on the alloy composition in the smelting process.
S2, smelting and casting. The vacuum induction melting furnace is firstly cleaned completely, so that cleanness and cleanness of the vacuum induction melting furnace are guaranteed, and influence of impurity elements on alloy composition is avoided. And then, adding Fe, co and Cr elements along with a furnace, vacuumizing until the vacuum degree is 0.08 to 0.10 MPa, starting an induction current switch, heating until all the alloy elements are completely melted, starting an electromagnetic stirring device, and refining for 10 min. Cooling, adding C, ti and Mn elements, vacuumizing, introducing argon as protective atmosphere, starting induced current, and smelting for 3-5 times (3-5 min each time) to uniformly distribute the alloy elements. And finally, casting at high temperature of 1600-1700 ℃ to obtain an alloy cast ingot.
And S3, rolling. The alloy ingot is preserved at 1150-1250 ℃ for 7 h, and then immediately hot rolled for 9 times until the thickness of the alloy plate is 12 mm. And then preserving the temperature of the alloy at 1150-1250 ℃ for 30 h, immediately carrying out 3-pass asynchronous rolling to the thickness of 3 mm, and air-cooling to the room temperature. And removing oxide scales on the surface of the alloy plate by acid pickling, performing cold rolling on the alloy plate with the reduction rate of 60%, and then performing cold rolling on the alloy plate until the thickness of the alloy plate is 1.2 mm to obtain an alloy crude product.
And S4, heat treatment. Cutting the alloy plate into three equal parts by using a wire electric discharge machine, taking one part of the alloy plate, annealing the alloy plate by using 1 h in an annealing furnace at the temperature of 800 ℃, and then cooling the alloy plate by water to obtain the high-entropy alloy 2 with the target component.
Embodiment 3, the present invention provides a technical solution: a preparation method of a low-temperature wear-resistant alloy with strong plasticity synergistically improved;
the alloy composition can be expressed by molar ratio as follows: fe:45% -55%, mn:25% -35%, co:5% -15%, cr:5% -15%, C:0.5% -1.5%, ti:0.5% -1.5%.
S1, preparing raw materials. Preparing alloy element raw materials with high purity of more than 99.9%, comprehensively cleaning the raw materials by using absolute ethyl alcohol as a cleaning medium, and drying for later use to eliminate the influence of impurity components on the alloy composition. Then, according to the design components of the alloy, 50 kg of Fe, mn, co, cr, C and Ti are weighed for later use. Wherein the manganese element is called 1~3% in molar ratio so as to offset the influence of the volatilization of the Mn element on the alloy composition in the smelting process.
S2, smelting and casting. The vacuum induction melting furnace is firstly cleaned completely, so that cleanness and cleanness of the vacuum induction melting furnace are guaranteed, and influence of impurity elements on alloy composition is avoided. And then, adding Fe, co and Cr elements along with a furnace, vacuumizing until the vacuum degree is 0.08 to 0.10 MPa, starting an induction current switch, heating until all the alloy elements are completely melted, starting an electromagnetic stirring device, and refining for 10 min. Cooling, adding C, ti and Mn elements, vacuumizing, introducing argon as protective atmosphere, starting induced current, and smelting for 3-5 times (3-5 min each time) to uniformly distribute the alloy elements. And finally, casting at high temperature of 1600-1700 ℃ to obtain an alloy cast ingot.
And S3, rolling. The alloy ingot is preserved at 1150-1250 ℃ for 7 h, and then immediately hot rolled for 9 times until the thickness of the alloy plate is 12 mm. And then preserving the temperature of the alloy at 1150-1250 ℃ for 30 h, immediately carrying out 3-pass asynchronous rolling to the thickness of 3 mm, and air-cooling to the room temperature. And removing oxide scales on the surface of the alloy plate by acid pickling, performing cold rolling on the alloy plate with the reduction rate of 60%, and then performing cold rolling on the alloy plate until the thickness of the alloy plate is 1.2 mm to obtain an alloy crude product.
S4, heat treatment. Cutting the alloy plate into three equal parts by using a wire-cut electric discharge machine, taking one part of the three equal parts, annealing the alloy plate with 1 h in an annealing furnace at the temperature of 900 ℃, and then cooling the alloy plate with water to obtain the high-entropy alloy 3 with the target component.
In the experimental examples, the following experiments were carried out,
1. and respectively carrying out mechanical property tests on the obtained high-entropy alloy 1, the obtained high-entropy alloy 2 and the obtained high-entropy alloy 3. The test method is to prepare tensile test samples meeting the national standard, and carry out room-temperature tensile mechanical property test for 3 times so as to ensure the reliability of the test result.
2. Will obtain a highThe low-temperature friction performance test is respectively carried out on the entropy alloy 1, the high-entropy alloy 2 and the high-entropy alloy 3. The test method is to cut the alloy plate into 15X 10X 1.2 mm 3 The low-temperature friction test sample is subjected to low-temperature friction test in a multifunctional friction wear testing machine with the environmental temperature of 0 ℃, 40 ℃, 80 ℃ and 120 ℃ after the surface of the sample is polished. The GCr15 bearing steel ball commonly used in engineering is selected as a grinding pair, a friction experiment is carried out in a low-temperature rotation test module with the normal load of 10N, the rotation radius of 1 mm and the rotation speed of 60 rpm, and the single test time is 20 min. The test was performed 3 times at each ambient temperature to ensure the reliability of the test results.
Fig. 1 is an SEM image of a microstructure of a target strong plasticity synergistically enhanced low temperature wear resistant alloy prepared in example 1, example 2 and example 3 provided by the present invention, and a is an SEM image of example 1; b is the SEM image of example 2; c is the SEM image of example 3.
The alloy structure shown in the example 1 still has a large amount of rheological structure and shows the structural characteristics of incomplete recrystallization;
the alloy structure shown in the example 2 is all equiaxed grains, and the grains are fine;
the alloy structure shown in example 3 is still equiaxed but the grain size is significantly increased. The main reason for the differences in the structural characteristics of the alloy is the annealing temperature.
FIG. 2 is a tensile engineering stress-engineering strain curve of the target low-temperature wear-resistant alloy with strong plasticity and cooperative promotion prepared in examples 1, 2 and 3 provided by the invention,
the alloy of example 1 exhibited the greatest yield strength, but the elongation was the smallest, only about 18%.
The alloy of example 2 has the most excellent mechanical properties, and the elongation rate reaches about 45% while the yield strength is maintained at about 560 MPa, which is caused by the pinning effect of a large amount of nano-scale TiC precipitation relative dislocation in an alloy system and the stress-induced martensite phase transformation from FCC phase to HCP phase generated during the deformation of the alloy.
The yield strength and the elongation of the alloy in the example 3 are slightly reduced compared with those of the alloy in the example 2, because the grain size and the precipitated phase size of the alloy are enlarged due to the recrystallization annealing at higher temperature, so that the mechanical property of the alloy is influenced, and the excellent strong plasticity synergistic characteristic is still presented.
FIG. 3 is a graph of wear rates of the target alloys obtained in example 1 (FIG. a), example 2 (FIG. b) and example 3 (FIG. c) provided by the present invention in the environment of 0 ℃, -40 ℃, -80 ℃, -120 ℃.
The wear rates of all three alloys decreased significantly with decreasing ambient temperature and showed the lowest wear rate at-120 ℃. Particularly, the alloy of the example 3 shows the most excellent wear resistance in the environment of-120 ℃, and the wear rate is only 6.34 multiplied by 10 -5 mm 3 V (N.m). This is due to the synergy of the large amount of hard TiC precipitates in the alloy system with the hard HCP phase generated by stress induced martensitic transformation of the FCC phase to the HCP phase occurring during alloy deformation.
FIG. 4 is a three-dimensional profile of wear scar of alloy prepared in example 3 at 0 ℃, -40 ℃, -80 ℃, -120 ℃ provided by the invention.
0. After the alloy is rubbed in a temperature environment, the grinding mark is wide, a large deep furrow is shown, the grinding mark gradually becomes narrow along with the reduction of the temperature of the rubbing environment, a large-range deep furrow is not observed, the integral depth is shallow, and the excellent wear resistance of the alloy at a low temperature is further shown.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The low-temperature wear-resistant alloy with the strong plasticity promoted synergistically is characterized in that: the alloy comprises the following components in atomic ratio:
Fe：45%~55%；
Mn：25%~35%；
Co：5%~15%；
Cr：5%~15%；
C：0.5%~1.5%；
Ti：0.5%~1.5%。
2. the preparation method of the low-temperature wear-resistant alloy with the synergistic improvement on the strong plasticity according to claim 1, characterized by comprising the following steps of:
determining the quality of Fe, mn, co, cr, C and Ti elements according to the design target components of the alloy, weighing for later use after cleaning with absolute ethyl alcohol, selecting a vacuum induction melting method, sequentially melting and casting the Fe, co, cr, C, ti and Mn elements at high temperature under the protection of inert gas to obtain an alloy ingot, keeping the temperature of the alloy ingot, rolling to obtain an alloy plate, cold-rolling the alloy plate to obtain an alloy crude product, finally carrying out final heat treatment on the alloy crude product in a heat treatment furnace at 650 to 900 ℃, keeping the temperature for 1 h, and then carrying out water quenching to obtain the high-entropy alloy with the target components.
3. The preparation method of the low-temperature wear-resistant alloy with the synergistic improvement of the plasticity and the ductility as claimed in claim 2, wherein the vacuum induction melting is to add Fe, co and Cr elements along with a vacuum induction furnace, carry out vacuum refining for 10 min, add C, ti and Mn elements, fill inert gas for protection, melt for 3-5 min, and carry out high-temperature casting at 1600-1700 ℃ to obtain an alloy ingot.
4. The preparation method of the low-temperature wear-resistant alloy with the co-improved plasticity and the plasticity as claimed in claim 2, wherein the alloy plate is obtained by rolling, namely, an alloy ingot is subjected to heat preservation at 1150-1250 ℃ for 7 h, the alloy ingot is immediately subjected to rough rolling with the reduction rate of 97% for 9 times to 12 mm thickness, then the rough rolled alloy plate is subjected to heat preservation at 1150-1250 ℃ for 30 h, the alloy is immediately subjected to asynchronous rolling with the reduction rate of 97% for 3 times to 3 mm thickness, and finally the alloy plate is subjected to air cooling to the room temperature to obtain the hot-rolled alloy plate.
5. The preparation method of the low-temperature wear-resistant alloy with the synergistic improvement of the plasticity and the plasticity as claimed in claim 2, wherein the crude alloy product is obtained by removing oxide skin on the surface of the alloy plate, and cold-rolling the alloy plate at a reduction ratio of 60% to ensure that the final thickness of the alloy plate is 1.1 to 1.3 mm.
6. The preparation method of the low-temperature wear-resistant alloy with the synergistically improved strong plasticity according to claim 2, wherein the yield strength of the high-entropy alloy is up to 1015 MPa, and the elongation after fracture is up to 45%;
the lowest wear rate of the high-entropy alloy when being rubbed at the temperature of 120 ℃ below zero is 6.34 multiplied by 10 -5 mm 3 /(N·m)。
CN202211064086.5A 2022-09-01 2022-09-01 Low-temperature wear-resistant alloy with strong plasticity synergistic improvement and preparation method thereof Active CN115354241B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211064086.5A CN115354241B (en) 2022-09-01 2022-09-01 Low-temperature wear-resistant alloy with strong plasticity synergistic improvement and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211064086.5A CN115354241B (en) 2022-09-01 2022-09-01 Low-temperature wear-resistant alloy with strong plasticity synergistic improvement and preparation method thereof

Publications (2)

Publication Number Publication Date
CN115354241A true CN115354241A (en) 2022-11-18
CN115354241B CN115354241B (en) 2023-05-12

Family

ID=84005449

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211064086.5A Active CN115354241B (en) 2022-09-01 2022-09-01 Low-temperature wear-resistant alloy with strong plasticity synergistic improvement and preparation method thereof

Country Status (1)

Country Link
CN (1) CN115354241B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107326246A (en) * 2017-07-17 2017-11-07 西安交通大学 A kind of high-performance high-entropy alloy and its processing method
US20180371584A1 (en) * 2015-12-22 2018-12-27 Sanyo Special Steel Co., Ltd. High Hardness and High Toughness Powder
CN112522634A (en) * 2019-09-17 2021-03-19 东北大学 High-strength high-entropy alloy and preparation method thereof
CN112522563A (en) * 2020-10-30 2021-03-19 西安福莱电工合金有限公司 Low-temperature high-strength high-toughness high-entropy alloy and processing method thereof
CN114427060A (en) * 2022-01-28 2022-05-03 临清市同兴轴承锻造有限公司 Fe reinforced by TiC dispersed phase50Mn25Ni10Cr15Method for medium entropy alloying
CN114855097A (en) * 2022-05-09 2022-08-05 西北工业大学 Method for improving strength and low-temperature wear resistance of FeMnCoCr high-entropy alloy

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180371584A1 (en) * 2015-12-22 2018-12-27 Sanyo Special Steel Co., Ltd. High Hardness and High Toughness Powder
CN107326246A (en) * 2017-07-17 2017-11-07 西安交通大学 A kind of high-performance high-entropy alloy and its processing method
CN112522634A (en) * 2019-09-17 2021-03-19 东北大学 High-strength high-entropy alloy and preparation method thereof
CN112522563A (en) * 2020-10-30 2021-03-19 西安福莱电工合金有限公司 Low-temperature high-strength high-toughness high-entropy alloy and processing method thereof
CN114427060A (en) * 2022-01-28 2022-05-03 临清市同兴轴承锻造有限公司 Fe reinforced by TiC dispersed phase50Mn25Ni10Cr15Method for medium entropy alloying
CN114855097A (en) * 2022-05-09 2022-08-05 西北工业大学 Method for improving strength and low-temperature wear resistance of FeMnCoCr high-entropy alloy

Also Published As

Publication number Publication date
CN115354241B (en) 2023-05-12

Similar Documents

Publication Publication Date Title
JP6263333B2 (en) Cu-Ti copper alloy sheet, method for producing the same, and current-carrying component
Wang et al. Effects of minor rare earths on the microstructure and properties of Cu-Cr-Zr alloy
Bei et al. Aging effects on the mechanical properties of alumina-forming austenitic stainless steels
KR101577877B1 (en) Process for producing copper alloy sheet material
Li et al. Effect of annealing temperature on microstructure and mechanical properties of a severe cold-rolled FeCoCrNiMn high-entropy alloy
KR101418775B1 (en) Beta type titanium alloy with low elastic modulus and high strength
KR20140056003A (en) Cu-ni-co-si based copper alloy sheet materal and method for producing the same
CN101871059A (en) Copper alloy sheet and method for producing same
US9493858B2 (en) Copper alloy
KR20120104532A (en) Copper alloy sheet material, connector using same, and copper alloy sheet material production method for producing same
Li et al. Effect of pre-deformation on microstructures and mechanical properties of high purity Al–Cu–Mg alloy
CN113046642A (en) Low-cost high-strength high-corrosion-resistance stainless steel and preparation method thereof
JP6317967B2 (en) Cu-Ni-Co-Si-based copper alloy sheet, method for producing the same, and current-carrying component
Shabani et al. Evaluation of microstructure and texture formation during annealing of cold-rolled FeCrCuMnNi multiphase high-entropy alloy
JP4414727B2 (en) Magnetic steel sheet with excellent magnetic properties and deformation resistance and manufacturing method thereof
TW202223116A (en) Method for manufacturing austenitic stainless steel strip
CN114855097B (en) Method for improving FeMnCoCr high-entropy alloy strength and low-temperature wear resistance
Tang et al. Improved microstructure, mechanical properties and electrical conductivity of the Cu–Ni–Sn–Ti–Cr alloy due to Ce micro-addition
Kimura et al. Microstructure control and mechanical properties of binary Co–Al alloys based on B2 intermetallic compound CoAl
Markandeya et al. Effect of prior cold work on age hardening of Cu–3Ti–1Cr alloy
JP6801464B2 (en) Non-oriented electrical steel sheet
Rhu et al. Mechanical properties of Cu-6Ni-2Mn-2Sn-xAl alloys
JP6639147B2 (en) Cu-Ti-based copper alloy sheet, method for producing the same, and current-carrying part
Feng et al. Enhancement of strength-ductility combination in recovery-annealed Fe–Mn–C twinning-induced plasticity steels by Si alloying
CN115354241B (en) Low-temperature wear-resistant alloy with strong plasticity synergistic improvement and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant