Super wear-corrosion-resistant high-temperature iron-based amorphous alloy and preparation method thereof

Abstract

The invention provides a super-wear-corrosion-resistant high-temperature iron-based amorphous alloy and relates to the field of amorphous alloy materials, the chemical formula of the iron-based amorphous alloy is Fea( Co + Ni) bCrc (W + Nb + Ta) dMeC10B4, and M is any one of Y, Dy, Er, Tm and Yb. The amorphous alloy has the glass transition temperature as high as 930K and the crystallization temperature as high as 950K, and has good high-temperature stability; meanwhile, the material has excellent amorphous forming ability, a block material with the three-dimensional size not smaller than 2 mm can be obtained, the self-corrosion current density of the material in a 3.5% NaCl solution is as low as 1.32 * 10 <-6 > A / cm < 2 >, the corrosion rate of the material in an aqua regia solution is 0.1 mm / a, and the material has wear resistance as low as 6.17 * 10 <-6 > mm < 3 > / Nm and has excellent corrosion resistance and wear resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of amorphous alloy materials, and in particular to a super wear-resistant high-temperature iron-based amorphous alloy and a preparation method thereof. Background Art

[0002] Components used in marine equipment, aerospace, automotive machinery, pipeline transportation, and other fields are subject to unavoidable corrosion and wear during long-term service. This can reduce equipment lifespan at best and cause equipment failure at worst, posing difficult-to-assess safety risks. Therefore, the research and development of corrosion-resistant and wear-resistant metal materials is crucial. Amorphous alloys have a uniform composition and lack the defects found in ordinary metals, such as dislocations and grain boundaries. This unique structure often gives them superior strength, hardness, and corrosion resistance compared to traditional alloys. However, because amorphous alloys are energetically metastable, transient temperature rises in extreme environments or when wear occurs can accelerate their evolution toward a thermodynamically stable state, causing them to lose their superior properties.

[0003] Among the many amorphous alloy systems currently developed, iron-based amorphous alloys offer high strength, excellent corrosion resistance, and wear resistance. For example, in water pipelines, their dense, grain-boundary-free structure and excellent chloride ion corrosion resistance (corrosion rate <0.01 mm / a) effectively protect against chlorine-containing, acidic, and alkaline water. Furthermore, the gradient surface hardness design, ranging from HV900 to 1400, significantly reduces the risk of water erosion wear. Furthermore, the high iron content of iron-based amorphous alloys gives them a natural low-cost advantage. Consequently, with the continued research and development of iron-based amorphous alloys, they have demonstrated significant research value and commercial application prospects in areas such as protective coatings, soft magnetic materials, and wastewater degradation. However, the development of extreme operating conditions, such as high temperatures, strong acids and bases, and liquid alloy corrosion, has placed higher demands on materials. The glass transition and crystallization temperatures of most iron-based amorphous alloys are within the 700K to 850K range, which cannot meet this growing demand. Chinese patent document CN102965597A discloses a highly corrosion-resistant iron-based soft magnetic amorphous alloy and a preparation method thereof. The molecular formula of the iron-based soft magnetic amorphous alloy is Fe a Cr b Ni c Mo d P e C f B g Si h , which has excellent corrosion resistance, with a corrosion rate of less than 0.1 mm / a in NaCl solution, but its glass transition temperature is significantly reduced, which is not conducive to high temperature applications; Chinese patent document CN108531834A discloses a wear-resistant and corrosion-resistant high-chromium iron-based amorphous alloy and its preparation method. The atomic percentage expression of the iron-based amorphous alloy system is (Fe 1-aNi a ) 77-x-y-z Cr x Mo y Cu z (C 1-b P b ) 15 B6Y2 has high thermal stability, an amorphous size of 4 to 8 mm, and a Vickers hardness of 1100 to 1400 HV. Although the Vickers hardness of 1400 HV is significantly improved compared to most iron-based amorphous alloys, its protective ability is still insufficient as a coating that requires extremely high hardness in harsh environments. For example, this hardness range can meet the anti-sand wear requirements of conventional water pipelines, but its hardness is poor for special water quality containing hard particles. Chinese patent document CN118685720A discloses a preparation method and application of a highly corrosion-resistant and wear-resistant iron-based bulk amorphous alloy. The chemical composition of the iron-based amorphous alloy is Fe 65-a Co 10 ZlUT a B 20 , its glass transition temperature is increased to above 800K, but its critical amorphous formation diameter is only 1.5mm, which is not conducive to industrial application.

[0004] In summary, it is urgent to develop an iron-based amorphous alloy with excellent comprehensive performance, which is required to have high glass transition temperature, crystallization temperature, high hardness and excellent corrosion resistance and wear resistance, while ensuring its good amorphous forming ability so that it can be used for industrial production, thereby better meeting complex and harsh service conditions. Summary of the Invention

[0005] In response to the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a super wear-resistant high-temperature iron-based amorphous alloy, which has a high glass transition temperature, crystallization temperature, high hardness and ultra-high corrosion and wear resistance. In addition, the amorphous alloy does not contain expensive metal elements and has good amorphous forming ability, so as to facilitate industrial application.

[0006] Another object of the present invention is to provide a method for preparing the above-mentioned iron-based amorphous alloy.

[0007] The purpose of the present invention is achieved through the following technical solutions: A super wear-resistant high-temperature iron-based amorphous alloy, the chemical formula of the iron-based amorphous alloy is: Fe a (Co+Ni) b Cr c (W+Nb+Ta) d M e C 10 B4, wherein M is any one of Y, Dy, Er, Tm, and Yb.

[0008] Based on further optimization of the above scheme, a=35~52, b=6~12, c=15~27, d=6~9, e=1.5~2.5, and a+b+c+d+e=86.

[0009] Based on further optimization of the above scheme, the ratio of Co to Ni is 2:1.

[0010] Based on further optimization of the above solution, the ratio of W, Nb and Ta is 1:1:1.

[0011] Based on further optimization of the above solution, the form of the super wear-resistant high-temperature iron-based amorphous alloy includes any one of powder, film, wire, strip or block, or a combination of two or more.

[0012] Based on further optimization of the above solution, the critical block diameter of the super wear-resistant high-temperature iron-based amorphous alloy is not less than 2 mm.

[0013] A method for preparing a super wear-resistant high-temperature iron-based amorphous alloy, comprising: Step S1, weighing raw materials: according to Fe a (Co+Ni) b Cr c (W+Nb+Ta) d M e C 10 B4, where: a=35-52, b=6-12, c=15-27, d=6-9, e=1.5-2.5, and the alloy composition of a+b+c+d+e=86, weigh the raw materials of each component; Step S2, preparing a master alloy ingot: uniformly melting the raw materials weighed in step S1 in an atmosphere that is first evacuated and then filled with a protective gas to prepare a master alloy ingot; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and smelted, and then suction-casted into a water-cooled copper mold for cooling to obtain a super-wear-resistant high-temperature iron-based amorphous alloy.

[0014] Based on the further optimization of the above scheme, the vacuum degree in step S2 is 6x10 -3 Pa, argon is used as the protective gas.

[0015] Based on further optimization of the above scheme, the uniform melting temperature in step S2 is 2800°C to 3500°C; and the heating melting temperature in step S3 is 1500°C to 1700°C.

[0016] The following are the effects of the technical solution of the present invention: The wear-resistant high-temperature iron-based amorphous alloy prepared by the present invention has a uniform amorphous alloy composition and does not have defects such as dislocations and grain boundaries found in ordinary metal materials. This unique structure has better strength, hardness, corrosion resistance and other properties than traditional alloy materials. The glass transition temperature of the iron-based amorphous alloy can reach up to 930K, and the crystallization temperature can reach up to 950K, with excellent high-temperature thermal stability. At the same time, the prepared material has excellent amorphous forming ability and can prepare bulk materials with a diameter of more than 5mm. The good amorphous forming ability enables it to also prepare materials in the form of powders, films, wires or strips and their combinations. In addition, the wear-resistant high-temperature iron-based amorphous alloy prepared by the present invention also has excellent wear resistance and corrosion resistance. The room temperature compressive strength of the amorphous alloy can reach more than 4GPa, and the microhardness can reach more than 1500HV. At room temperature, the self-corrosion current density in a 3.5% NaCl solution is as low as 1.32x10 -6 A / cm 2 The corrosion rate in aqueous regia solution is 0.1 mm / a; at room temperature, the friction coefficient is as low as 0.49 and the wear rate is as low as 6.17x10 -6 mm 3 / Nm. That is, the wear-resistant high-temperature iron-based amorphous alloy prepared by the present invention can have excellent amorphous forming ability, high glass transition temperature and crystallization temperature as well as ultra-high corrosion resistance and wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 These are the XRD patterns of the samples of Examples 1 to 3 of the present invention.

[0018] Figure 2 These are the thermal analysis curves of the samples of Examples 1 to 3 of the present invention.

[0019] Figure 3 1 is a stress-strain curve diagram of the samples of Examples 1 to 3 of the present invention.

[0020] Figure 4 These are the microhardness diagrams of the samples of Examples 1 to 3 of the present invention.

[0021] Figure 5 The potentiodynamic polarization curves of the samples of Examples 1 to 3 of the present invention are shown.

[0022] Figure 6 This is a graph of the aqua regia corrosion rate of the sample in Example 1 of the present invention.

[0023] Figure 7 This is a wear curve diagram of the samples of Examples 1 to 3 of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Example 1: A super wear-resistant high-temperature iron-based amorphous alloy, the chemical formula of the iron-based amorphous alloy is: Fe a (Co+Ni) b Cr c (W+Nb+Ta) d M e C 10 B4, where M is Yb, and the atomic percentages of the components are: Fe: 39%, Co: 8%, Ni: 4%, Cr: 27%, W: 2%, Nb: 2%, Ta: 2%, C: 10%, B: 4%, Yb: 2%, i.e., Fe 39 Co8Ni4Cr 27 W2Nb2Ta2Yb2C 10 B4.

[0026] The specific preparation method includes: Step S1, weighing raw materials: accurately weighing each raw material according to the above atomic percentage, and the raw materials use elemental iron, cobalt, nickel, chromium, tungsten, niobium, tantalum, carbon, boron and yttrium with a purity of not less than 99.9wt.%; Step S2, preparing a master alloy ingot: placing the raw materials weighed in step S1 into the first copper crucible of the arc melting furnace, placing titanium sponge into the second copper crucible, and evacuating the arc melting furnace to a vacuum of 6×10 -3 Pa, turn off the molecular pump, fill with argon to positive pressure, melt the titanium sponge in the second copper crucible to remove the residual impurity gas in the furnace, and then repeatedly melt the raw materials in the first copper crucible at a melting temperature of 3000 ° C to obtain a master alloy ingot with uniform composition; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and melted at a heating and melting temperature of 1550° C., and then suction-casted into a water-cooled copper mold with an inner cavity diameter of 5 mm. After cooling, a 5 mm sample is obtained.

[0027] The amorphous structure of the sample was characterized by XRD diffractometer, such as Figure 1 As shown, only one diffuse scattering peak was detected in the sample of Example 1, and no sharp diffraction peak from the crystal phase was detected, indicating that the 5 mm sample prepared in Example 1 was a completely amorphous structure.

[0028] The thermal stability of the samples was investigated using a differential thermal analyzer with a heating rate of 20 K / min. Figure 2As shown, the glass transition temperature of the sample of Example 1 was measured to be 880K and the crystallization temperature was measured to be 917K, indicating that the sample has good high temperature stability.

[0029] Example 2: A super wear-resistant high-temperature iron-based amorphous alloy, the chemical formula of the iron-based amorphous alloy is: Fe a (Co+Ni) b Cr c (W+Nb+Ta) d M e C 10 B4, where M is Y, and the atomic percentages of the components are: Fe: 43.5%, Co: 7%, Ni: 3.5%, Cr: 23%, W: 2.5%, Nb: 2.5%, Ta: 2.5%, C: 10%, B: 4%, Y: 1.5%, i.e., Fe 43.5 Co7Ni 3.5 Cr 23 W 2.5 Nb 2.5 Ta 2.5 Y 1.5 C 10 B4.

[0030] The specific preparation method includes: Step S1, weighing raw materials: accurately weighing each raw material according to the above atomic percentage, and the raw materials use elemental iron, cobalt, nickel, chromium, tungsten, niobium, tantalum, carbon, boron and yttrium with a purity of not less than 99.9wt.%; Step S2, preparing a master alloy ingot: placing the raw materials weighed in step S1 into the first copper crucible of the arc melting furnace, placing titanium sponge into the second copper crucible, and evacuating the arc melting furnace to a vacuum of 6×10 -3 Pa, turn off the molecular pump, fill with argon to positive pressure, melt the titanium sponge in the second copper crucible to remove the residual impurity gas in the furnace, and then repeatedly melt the raw materials in the first copper crucible at a melting temperature of 3100 ° C to obtain a master alloy ingot with uniform composition; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and melted at a heating and melting temperature of 1600° C., and then suction-casted into a water-cooled copper mold with an inner cavity diameter of 3 mm. After cooling, a 3 mm sample is obtained.

[0031] The amorphous structure of the sample was characterized by XRD diffractometer, such as Figure 1 As shown, only one diffuse scattering peak was detected for the sample of Example 2, and no sharp diffraction peak from the crystalline phase was detected, indicating that the 3 mm sample prepared in Example 2 was a completely amorphous structure.

[0032] The thermal stability of the samples was investigated using a differential thermal analyzer with a heating rate of 20 K / min. Figure 2 As shown, the glass transition temperature of the sample of Example 2 was measured to be 904K and the crystallization temperature was measured to be 926K, indicating that the sample has good high-temperature thermal stability.

[0033] Example 3: A super wear-resistant high-temperature iron-based amorphous alloy, the chemical formula of the iron-based amorphous alloy is: Fe a (Co+Ni) b Cr c (W+Nb+Ta) d M e C 10 B4, where M is Tb, and the atomic percentages of the components are: Fe: 51.5%, Co: 4%, Ni: 2%, Cr: 18%, W: 3%, Nb: 3%, Ta: 3%, C: 10%, B: 4%, Tb: 1.5%, i.e., Fe 51.5 Co4Ni2Cr 18 W3Nb3Ta3Tb 1.5 C 10 B4.

[0034] The specific preparation method includes: Step S1, weighing raw materials: accurately weighing each raw material according to the above atomic percentage, and the raw materials use elemental iron, cobalt, nickel, chromium, tungsten, niobium, tantalum, carbon, boron and yttrium with a purity of not less than 99.9wt.%; Step S2, preparing a master alloy ingot: placing the raw materials weighed in step S1 into the first copper crucible of the arc melting furnace, placing titanium sponge into the second copper crucible, and evacuating the arc melting furnace to a vacuum of 6×10 -3 Pa, turn off the molecular pump, fill with argon to positive pressure, melt the titanium sponge in the second copper crucible to remove the residual impurity gas in the furnace, and then repeatedly melt the raw materials in the first copper crucible at a melting temperature of 3200 ° C to obtain a master alloy ingot with uniform composition; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and melted at a heating and melting temperature of 1700° C., and then suction-casted into a water-cooled copper mold with an inner cavity diameter of 2 mm. After cooling, a 2 mm sample is obtained.

[0035] The amorphous structure of the sample was characterized by XRD diffractometer, such as Figure 1 As shown, only one diffuse scattering peak was detected for the sample of Example 3, and no sharp diffraction peak from the crystalline phase was detected, indicating that the 2 mm sample prepared in Example 3 was a completely amorphous structure.

[0036] The thermal stability of the samples was investigated using a differential thermal analyzer with a heating rate of 20 K / min. Figure 2 As shown, the glass transition temperature of the sample of Example 3 was measured to be 912K and the crystallization temperature was measured to be 932K, indicating that the sample has good high temperature stability.

[0037] Comparative Example 1: An iron-based amorphous alloy, the chemical formula of the iron-based amorphous alloy is: Fe a Co b Cr c (W+Nb+Ta) d M e C 10 B4, where M is Y, and the atomic percentages of the components are: Fe: 43.5%, Co: 10.5%, Cr: 23%, W: 2.5%, Nb: 2.5%, Ta: 2.5%, C: 10%, B: 4%, Y: 1.5%, i.e., Fe 43.5 Co 10.5 Cr 23 W 2.5 Nb 2.5 Ta 2.5 Y 1.5 C 10 B4.

[0038] The specific preparation method includes: Step S1, weighing raw materials: accurately weighing each raw material according to the above atomic percentage, and the raw materials use elemental iron, cobalt, chromium, tungsten, niobium, tantalum, carbon, boron and yttrium with a purity of not less than 99.9wt.%; Step S2, preparing a master alloy ingot: placing the raw materials weighed in step S1 into the first copper crucible of the arc melting furnace, placing titanium sponge into the second copper crucible, and evacuating the arc melting furnace to a vacuum of 6×10 -3 Pa, turn off the molecular pump, fill with argon to positive pressure, melt the titanium sponge in the second copper crucible to remove the residual impurity gas in the furnace, and then repeatedly melt the raw materials in the first copper crucible at a melting temperature of 3100 ° C to obtain a master alloy ingot with uniform composition; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and melted at a heating and melting temperature of 1600° C., and then suction-casted into a water-cooled copper mold with an inner cavity diameter of 1.5 mm. After cooling, a 1.5 mm sample is obtained.

[0039] Comparative Example 2: An iron-based amorphous alloy, the chemical formula of the iron-based amorphous alloy is: Fe a Ni b Cr c (W+Nb+Ta) d M e C 10B4, where M is Y, and the atomic percentages of the components are: Fe: 43.5%, Ni: 10.5%, Cr: 23%, W: 2.5%, Nb: 2.5%, Ta: 2.5%, C: 10%, B: 4%, Y: 1.5%, i.e., Fe 43.5 Ni 10.5 Cr 23 W 2.5 Nb 2.5 Ta 2.5 Y 1.5 C 10 B4.

[0040] The specific preparation method includes: Step S1, weighing raw materials: accurately weighing each raw material according to the above atomic percentage, and the raw materials use elemental iron, nickel, chromium, tungsten, niobium, tantalum, carbon, boron and yttrium with a purity of not less than 99.9wt.%; Step S2, preparing a master alloy ingot: placing the raw materials weighed in step S1 into the first copper crucible of the arc melting furnace, placing titanium sponge into the second copper crucible, and evacuating the arc melting furnace to a vacuum of 6×10 -3 Pa, turn off the molecular pump, fill with argon to positive pressure, melt the titanium sponge in the second copper crucible to remove the residual impurity gas in the furnace, and then repeatedly melt the raw materials in the first copper crucible at a melting temperature of 3100 ° C to obtain a master alloy ingot with uniform composition; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and melted at a heating and melting temperature of 1600° C., and then suction-casted into a water-cooled copper mold with an inner cavity diameter of 1.5 mm. After cooling, a 1.5 mm sample is obtained.

[0041] Comparative Example 3: An iron-based amorphous alloy, the chemical formula of the iron-based amorphous alloy is: Fe a (Co+Ni) b Cr c W d M e C 10 B4, where M is Y, and the atomic percentages of the components are: Fe: 43.5%, Co: 7%, Ni: 3.5%, Cr: 23%, W: 7.5%, C: 10%, B: 4%, Y: 1.5%, i.e., Fe 43.5 Co7Ni 3.5 Cr 23 W 7.5 Y 1.5 C 10 B4.

[0042] The specific preparation method includes: Step S1, weighing raw materials: accurately weighing each raw material according to the above atomic percentage, and the raw materials use elemental iron, cobalt, nickel, chromium, tungsten, carbon, boron and yttrium with a purity of not less than 99.9wt.%; Step S2, preparing a master alloy ingot: placing the raw materials weighed in step S1 into the first copper crucible of the arc melting furnace, placing titanium sponge into the second copper crucible, and evacuating the arc melting furnace to a vacuum of 6×10 -3 Pa, turn off the molecular pump, fill with argon to positive pressure, melt the titanium sponge in the second copper crucible to remove the residual impurity gas in the furnace, and then repeatedly melt the raw materials in the first copper crucible at a melting temperature of 3100 ° C to obtain a master alloy ingot with uniform composition; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and melted at a heating and melting temperature of 1600° C., and then suction-casted into a water-cooled copper mold with an inner cavity diameter of 1.5 mm. After cooling, a 1.5 mm sample is obtained.

[0043] Comparative Example 4: An iron-based amorphous alloy, the chemical formula of the iron-based amorphous alloy is: Fe a (Co+Ni) b Cr c Nb d M e C 10 B4, where M is Y, and the atomic percentages of the components are: Fe: 43.5%, Co: 7%, Ni: 3.5%, Cr: 23%, Nb: 7.5%, C: 10%, B: 4%, Y: 1.5%, i.e., Fe 43.5 Co7Ni 3.5 Cr 23 Nb 7.5 Y 1.5 C 10 B4.

[0044] The specific preparation method includes: Step S1, weighing raw materials: accurately weighing each raw material according to the above atomic percentage, and the raw materials use elemental iron, cobalt, nickel, chromium, niobium, carbon, boron and yttrium with a purity of not less than 99.9wt.%; Step S2, preparing a master alloy ingot: placing the raw materials weighed in step S1 into the first copper crucible of the arc melting furnace, placing titanium sponge into the second copper crucible, and evacuating the arc melting furnace to a vacuum of 6×10 -3 Pa, turn off the molecular pump, fill with argon to positive pressure, melt the titanium sponge in the second copper crucible to remove the residual impurity gas in the furnace, and then repeatedly melt the raw materials in the first copper crucible at a melting temperature of 3100 ° C to obtain a master alloy ingot with uniform composition; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and melted at a heating and melting temperature of 1600° C., and then suction-casted into a water-cooled copper mold with an inner cavity diameter of 1.5 mm. After cooling, a 1.5 mm sample is obtained.

[0045] Comparative Example 5: An iron-based amorphous alloy, the chemical formula of the iron-based amorphous alloy is: Fe a (Co+Ni) b Cr c Ta d M e C 10 B4, where M is Y, and the atomic percentages of the components are: Fe: 43.5%, Co: 7%, Ni: 3.5%, Cr: 23%, Ta: 7.5%, C: 10%, B: 4%, Y: 1.5%, i.e., Fe 43.5 Co7Ni 3.5 Cr 23 Ta 7.5 Y 1.5 C 10 B4.

[0046] The specific preparation method includes: Step S1, weighing raw materials: accurately weighing each raw material according to the above atomic percentages, and the raw materials use elemental iron, cobalt, nickel, chromium, tantalum, carbon, boron and yttrium with a purity of not less than 99.9wt.%; Step S2, preparing a master alloy ingot: placing the raw materials weighed in step S1 into the first copper crucible of the arc melting furnace, placing titanium sponge into the second copper crucible, and evacuating the arc melting furnace to a vacuum of 6×10 -3 Pa, turn off the molecular pump, fill with argon to positive pressure, melt the titanium sponge in the second copper crucible to remove the residual impurity gas in the furnace, and then repeatedly melt the raw materials in the first copper crucible at a melting temperature of 3100 ° C to obtain a master alloy ingot with uniform composition; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and melted at a heating and melting temperature of 1600° C., and then suction-casted into a water-cooled copper mold with an inner cavity diameter of 1.5 mm. After cooling, a 1.5 mm sample is obtained.

[0047] The samples prepared in Examples 1 to 3 and Comparative Examples 1 to 5 were subjected to various performance tests, and the test results are shown in the following table:

[0048] It is obvious from the above table that the iron-based amorphous alloy prepared by using the specific elements of the present invention has excellent amorphous forming ability and corrosion resistance and wear resistance. That is, the critical size of amorphous formation exceeds 2 mm, and the self-corrosion current density in 3.5% NaCl solution is as low as 1.32x10 -6 A / cm 2 At room temperature, the friction coefficient is as low as 0.49 and the wear rate is as low as 6.17x10 -6 mm 3 / Nm.

Claims

1. A super wear-resistant high-temperature iron-based amorphous alloy, characterized by: The chemical formula of the iron-based amorphous alloy is: Fe a (Co+Ni) b Cr c (W+Nb+Ta) d M e C 10 B4, wherein M is any one of Y, Dy, Er, Tm, and Yb.

2. The super wear-resistant high-temperature iron-based amorphous alloy according to claim 1, characterized in that: a=35-52, b=6-12, c=15-27, d=6-9, e=1.5-2.5, and a+b+c+d+e=86.

3. The super wear-resistant high-temperature iron-based amorphous alloy according to claim 1 or 2, characterized in that: The ratio of Co to Ni is 2:

1.

4. The super wear-resistant high-temperature iron-based amorphous alloy according to claim 1 or 3, characterized in that: The ratio of W, Nb and Ta is 1:1:

1.

5. The super wear-resistant high-temperature iron-based amorphous alloy according to claim 1, characterized in that: The form of the super wear-resistant high-temperature iron-based amorphous alloy includes any one of powder, film, wire, strip or block, or a combination of two or more.

6. The super wear-resistant high-temperature iron-based amorphous alloy according to claim 1, characterized in that: The critical diameter of the block of the super wear-resistant high-temperature iron-based amorphous alloy is not less than 2 mm.

7. The method for preparing a super wear-resistant high-temperature iron-based amorphous alloy according to any one of claims 1 to 6, characterized in that: include: Step S1, weighing raw materials: according to Fe a (Co+Ni) b Cr c (W+Nb+Ta) d C 10 B4M e , where: a=35~52, b=6~12, c=15~27, d=6~9, e=1.5~2.5, and the alloy composition of a+b+c+d+e=86 is weighed; Step S2, preparing a master alloy ingot: uniformly melting the raw materials weighed in step S1 in an atmosphere that is first evacuated and then filled with a protective gas to prepare a master alloy ingot; Step S3, copper mold suction casting: the master alloy prepared in step S2 is heated and smelted, and then suction-casted into a water-cooled copper mold for cooling to obtain a super-wear-resistant high-temperature iron-based amorphous alloy.

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