Zr-based amorphous alloy material, vibrating wire and vibrating wire strain gauge

Abstract

The invention provides a Zr-based amorphous alloy material, a vibrating wire and a vibrating wire strain gauge. Specifically, the invention provides a Zr-based amorphous alloy material, the Zr-based amorphous alloy material comprises Zr, Co, Fe and Ni, and the atomic ratio of Zr to Co to Fe to Ni is (32-57): (12-26): (6-18): (6-13). The invention further provides application of the Zr-based amorphous alloy material in a vibrating wire strain gauge. The vibrating wire strain gauge provided by the invention has the characteristics of high sensitivity and high precision, and also has high range and high stability. Compared with other vibrating wire strain gauge optimization technologies, the vibrating wire strain gauge has higher dynamic and static precision, the structure of the strain gauge is simpler, and the production cost is lower.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibrating wire strain gauges. Specifically, the present invention relates to a Zr-based amorphous alloy material and its use. More specifically, the present invention relates to a Zr-based amorphous alloy material, a vibrating wire and a vibrating wire strain gauge. Background Art

[0002] Vibrating wire strain gauges are commonly used for strain monitoring in the construction industry, such as roads and bridges. They can not only evaluate the bearing capacity of buildings, but also be used for early warning of sudden situations such as bridge fractures and deformations, playing an important role in ensuring the safe operation of buildings. When the structure under test is strained, the vibrating wire strain gauge will generate strain synchronously, and the deformation will be transmitted to the tensioned vibrating wire through the front and rear end seats, thereby converting into changes in the stress of the vibrating wire, and ultimately changing the vibration frequency of the vibrating wire. The frequency signal is transmitted to the reading device via a cable, and the strain inside the structure under test can be measured.

[0003] As one of the most commonly used strain gauges in the construction industry, the vibrating-wire strain gauge is required to have the characteristics of high sensitivity, good consistency, and good linearity. At the same time, due to the diversity of working environments, the vibrating-wire strain gauge is also required to have high strength, good temperature stability, and easy installation. Therefore, as a structural component of the strain gauge, the vibrating wire needs to have a high yield strength and elastic limit, and a low Young's modulus and thermal expansion coefficient. The vibrating wires on the market usually use wires such as stainless steel, nickel-chromium alloy, and tungsten-rhenium alloy. Due to the inherent characteristics of crystalline materials, the Young's modulus of these high-strength alloys is usually high, not less than 200GPa, resulting in a low sensitivity of the vibrating-wire strain gauge. At the same time, changes in external temperature will cause the thermal expansion and contraction of the vibrating wire, affecting the natural frequency of the steel wire.

[0004] In view of the limitations of existing vibrating wires, researchers are committed to improving the accuracy, sensitivity and stability of vibrating wire strain gauges through algorithm compensation and structural compensation.

[0005] For example, Kang Jingfu's team can improve the accuracy of vibrating-wire strain gauges by calculating temperature stress and simulating elastic constraints to obtain temperature correction coefficients. NARI Group controls the effective elastic modulus of the strain gauge to 300-500 MPa through structural design, greatly improving the sensitivity of the strain gauge. In the technical solution disclosed in CN 116697867A, the measuring unit is fixed on the steel string, which amplifies the natural frequency of the steel string and thus improves the sensitivity of the strain gauge. Although these subsequent processing such as structural compensation, temperature compensation, and algorithm compensation can effectively improve the accuracy, sensitivity, and stability of the strain gauge, they will also significantly increase its manufacturing cost and processing complexity, which is not conducive to the promotion of market-oriented applications.

[0006] Based on the above problems, how to design a vibrating-wire strain gauge with low cost, high precision, high sensitivity and high thermal stability is of great significance for reducing detection costs and improving the reliability of monitoring data. Summary of the invention

[0007] The object of the present invention is to provide a Zr-based amorphous alloy material having excellent mechanical properties and forming ability.

[0008] Another object of the present invention is to provide a vibrating wire strain gauge, which has high sensitivity and high precision, as well as high range and high stability. Compared with other vibrating wire strain gauge optimization technologies, the vibrating wire strain gauge of the present invention has higher dynamic and static accuracy, a simpler structure of the strain gauge, and lower production cost, and is suitable for the development and performance optimization of various types of vibrating wire strain gauges.

[0009] The above-mentioned object of the present invention is achieved through the following technical solutions.

[0010] Before describing the present invention, the terms used herein are defined as follows:

[0011] The term "amorphous alloy" means that: when the alloy solidifies by ultra-rapid cooling, the atoms do not have time to arrange themselves in an orderly manner and crystallize. The solid alloy obtained has a long-range disordered structure. The molecules (or atoms, ions) that make up the material do not have regular spatial periodicity, and there are no grains or grain boundaries of crystalline alloys.

[0012] The term "electromagnetic induction" means that when a vibrating wire is strained, the conductor arranged on the vibrating wire moves accordingly, the conductor and the fixed magnetic field produce relative motion, and an electromotive force is generated.

[0013] The term "excitation frequency" means that applying external excitation to a vibrating wire in a tensioned state changes its vibration frequency, and the frequency of the excitation signal is the excitation frequency.

[0014] In a first aspect, the present invention provides a Zr-based amorphous alloy material, wherein the Zr-based amorphous alloy material comprises Zr, Co, Fe and Ni, and the atomic ratio of Zr, Co, Fe and Ni is:

[0015] Zr:Co:Fe:Ni=(32~57):(12~26):(6~18):(6~13).

[0016] The inventors of the present application unexpectedly found that the amorphous alloy of the present invention exhibits mechanical performance significantly superior to that of crystalline materials, and can simultaneously have high yield strength, low Young's modulus, small thermal expansion coefficient, and excellent wear resistance. In addition, due to its glass properties, the amorphous alloy can be superplasticly formed at the temperature of the supercooled liquid phase, which can not only achieve extremely high surface finish and reach the roughness standard of the nanometer level, but also effectively avoid common preparation defects such as shrinkage, looseness, and pores.

[0017] The Zr-based amorphous alloy material of the present invention is very suitable for being made into filamentary products.

[0018] Preferably, in the Zr-based amorphous alloy material of the present invention, the Zr-based amorphous alloy material further comprises Cr, and the atomic ratio of Zr, Co, Fe, Ni and Cr is:

[0019] Zr:Co:Fe:Ni:Cr=(32~51):(12~26):(6~18):(6~12):(>0~7); that is, Zr:Co:Fe:Ni:Cr=(32~51):(12~26):(6~18):(6~12):(greater than 0 and less than or equal to 7).

[0020] Preferably, in the Zr-based amorphous alloy material of the present invention, the Zr-based amorphous alloy material further comprises Si, and the atomic ratio of Zr, Co, Fe, Ni and Si is:

[0021] Zr:Co:Fe:Ni:Si=(32~55):(12~26):(6~18):(6~9):(>0~8); that is, Zr:Co:Fe:Ni:Si=(32~55):(12~26):(6~18):(6~9):(greater than 0 and less than or equal to 8).

[0022] Preferably, in the Zr-based amorphous alloy material of the present invention, the Zr-based amorphous alloy material further comprises B, and the atomic ratio of Zr, Co, Fe, Ni and B is:

[0023] Zr:Co:Fe:Ni:B=(32~57):(12~26):(6~18):(6~9):(>0~5), that is, Zr:Co:Fe:Ni:B=(32~57):(12~26):(6~18):(6~9):(greater than 0 and less than or equal to 5).

[0024] Preferably, in the Zr-based amorphous alloy material of the present invention, the Zr-based amorphous alloy material further comprises S, and the atomic ratio of Zr, Co, Fe, Ni and S is:

[0025] Zr:Co:Fe:Ni:S=(32~55):(12~26):(6~18):(6~12):(>0~3), that is, Zr:Co:Fe:Ni:S=(32~55):(12~26):(6~18):(6~12):(greater than 0 and less than or equal to 3).

[0026] In the present invention, the proportion of each element has a significant impact on the performance of the amorphous alloy. If the Cr content is too high, it will not only cause catalysis of the amorphous alloy, but also have an adverse effect on the intergranular corrosion sensitivity of the heat-affected zone of the subsequent welding of the vibration wire.

[0027] If the Si content is too high, it will not only reduce the plasticity of the alloy, but also lead to an increase in the melting point, increase the difficulty of preparing the vibrating wire, and may cause inclusions or component segregation.

[0028] Excessive B will lead to reduced hardenability and crystallization of the alloy.

[0029] S is considered to be a harmful impurity. When the S content is too high, the alloy becomes hot brittle and forms sulfide solid solution impurities with Fe, resulting in reduced plasticity and fatigue strength of the alloy.

[0030] The present invention does not impose any particular limitation on the preparation method of the amorphous alloy, and the amorphous alloy can be prepared by conventional methods in the art, such as water spinning or spindle spinning. The cooling rate during the preparation process reaches more than one million degrees per second.

[0031] In a second aspect, the present invention provides use of the Zr-based amorphous alloy material of the present invention in a vibrating-wire strain gauge.

[0032] In a third aspect, the present invention provides a vibrating wire, which is composed of the Zr-based amorphous alloy material of the present invention.

[0033] The diameter of the Zr-based amorphous alloy vibrating wire of the present invention is 100-200 μm, and the length is 160-250 mm.

[0034] In a fourth aspect, the present invention provides a vibrating wire strain gauge comprising the vibrating wire of the present invention.

[0035] In the present invention, the structure of the amorphous alloy vibrating wire strain gauge includes:

[0036] The end seat, used as a tensioning device for the vibrating wire, is made of low thermal expansion stainless steel;

[0037] Amorphous alloy vibrating string;

[0038] Electromagnetic coil, when the conductor at the upper end of the vibrating string moves relative to the magnetic field, a measurable electrical signal is generated through electromagnetic induction;

[0039] Transmission cable, used for signal transmission between strain gauge and display instrument;

[0040] The housing, which encapsulates and protects the internal structure of the strain gage, is made of corrosion-resistant, high-strength stainless steel.

[0041] The principle of use of the vibrating wire strain gauge of the present invention is as follows: the vibrating wire is tensioned on the front and rear end seats by clamping or welding, and the vibration is completed through a weak excitation circuit. The vibration frequency of the vibrating wire is recorded as f0. When the measured component produces strain, the end seat of the vibrating wire strain gauge fixed on the measured component will produce a certain strain, which is converted into the deformation of the internal vibrating wire, thereby changing the basic natural frequency of the vibrating wire. By exciting the vibrating wire through an electromagnetic coil, its vibration frequency can be measured and recorded as f i The obtained frequency signal is transmitted to the external display instrument through the cable, and the strain ε of the measured component can be calculated by formula (1). Among them, K represents the coefficient of the original calibration of the strain gauge, which is the ratio of the tension force of the vibrating wire to f0.

[0042]

[0043] The performance test steps of the vibrating wire strain gauge of the present invention are as follows: the vibrating wire strain gauge is mounted on a calibration device, a weak excitation current is passed, and the initial vibration frequency f0 of the vibrating wire is obtained. i , apply pressure to the end seat on one side of the strain gauge until the target range, and then unload the pressure to 0 with the same step length, and repeat the whole process more than 3 times. Refer to the calibration specification (GB / T 13606-2007) and calculate ε according to the corresponding formula i -f i The data can be used to obtain the performance parameters of the amorphous alloy vibrating wire strain gauge in this range, including resolution, sensitivity, repeatability, linearity error and hysteresis. Under no pressure loading, change the ambient temperature of the vibrating wire strain gauge, record and keep the fluctuation of the strain gauge output frequency within 1% FS, then this temperature range is the applicable temperature of the strain gauge.

[0044] The measuring range of the amorphous alloy vibrating wire strain gauge of the present invention has different ranges, preferably, the measuring range is 1000 to 6000 με;

[0045] The resolution of the strain gauge of the present invention has a required range, and advantageously, the resolution is 0.01% FS to 0.2% FS;

[0046] The sensitivity of the strain gauge of the present invention has a required range, and advantageously, the sensitivity is not less than 2 Hz / με;

[0047] The repeatability of the strain gauge of the present invention has a required range, and advantageously, the repeatability is 0.01% FS to 0.5% FS;

[0048] The linear error of the strain gauge of the present invention has a required range, and advantageously, the linear error is 0.01% FS to 2% FS;

[0049] The hysteresis of the strain gauge of the present invention has a required range, and advantageously, the hysteresis is 0.01% FS to 0.5% FS;

[0050] The applicable temperature of the strain gauge of the present invention has different range requirements. Preferably, the temperature range is -20°C to 80°C, more preferably -20°C to 50°C;

[0051] The present invention has the following beneficial effects:

[0052] 1. The present invention uses amorphous alloy materials to prepare vibrating wires. Compared with traditional vibrating wires, amorphous alloys exhibit significantly superior mechanical properties, and can simultaneously possess high yield strength, low Young's modulus, and high elastic limit. Therefore, the strain gauge of the present invention can achieve at least a two-fold increase in range without the need for subsequent processing such as algorithm compensation and structural compensation, and the sensitivity is increased by more than two times. In addition, amorphous alloys have excellent elastic behavior and thermal stability, which ensures that the signal drift of the strain gauge under temperature changes and long-term use is effectively controlled, thereby further improving the test accuracy.

[0053] 2. The amorphous alloy vibrating wire of the present invention has unique processing properties. The amorphous alloy wire prepared by the water spinning method and the spindle method has small residual stress, high roundness and excellent surface finish. This preparation technology not only improves the processing accuracy of the vibrating wire and ensures the consistency of the product, but also is suitable for mass production, significantly reducing the preparation cost and production cycle.

[0054] 3. The present invention successfully solves the problem of the difficulty in reconciling stiffness and sensitivity of traditional strain gauges by optimizing the technical solution of vibrating wire materials. By utilizing the isotropy and unique microstructure of amorphous alloys, the vibrating wire strain gauge of the present invention can significantly improve the performance of the strain gauge without complicating the structural design. In addition, the present invention has universal applicability and can be combined with other technologies to further enhance the overall performance of the vibrating wire strain gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0056] Figure 1 shows the X-ray diffraction patterns of Examples 1-9;

[0057] Figure 2 shows the stress-strain curve of the amorphous alloy wire of Example 1;

[0058] Figure 3A schematic diagram showing the structure of an amorphous alloy vibrating wire strain gauge according to a specific embodiment of the present invention is shown;

[0059] Figure 4 A schematic diagram showing the appearance of an amorphous alloy vibrating wire strain gauge according to a specific embodiment of the present invention;

[0060] Figure 5 The X-ray diffraction patterns of Comparative Examples 2-7 are shown;

[0061] Description of reference numerals:

[0062] 1-end seat; 2-amorphous alloy vibrating string; 3-housing; 4-transmission cable; 5-excitation circuit; 6-conductor; 7-electromagnetic coil. DETAILED DESCRIPTION

[0063] The present invention is further described in detail below in conjunction with specific embodiments. The given examples are only for illustrating the present invention, but not for limiting the scope of the present invention.

[0064] Figure 1 The X-ray diffraction patterns of the amorphous alloy wires prepared in Examples 1 to 9 are shown. As shown in the figure, the surface of the amorphous alloy wires was X-ray diffracted using a Rigaku X-ray diffractometer equipped with a Cu-Kα radiation source, and its diffuse diffraction peak confirmed the amorphous structure of the material.

[0065] Figure 2 The quasi-static tensile stress-strain diagram of the amorphous alloy wire of Example 1 is shown; wherein the diameter of the amorphous alloy wire is 130 μm, and the strain rate is 0.005 s -1 As shown in the figure, the yield strength of the amorphous alloy wire of Example 1 is as high as 3200 MPa, and the Young's modulus can be as low as 142.2 GPa.

[0066] Figure 3 and Figure 4 The structure and appearance schematic diagram of the amorphous alloy vibrating wire strain gauge are shown respectively. As shown in the figure, the characteristic structure of the strain gauge mainly includes an end seat 1, an amorphous alloy vibrating wire 2, a housing 3, a transmission cable 4, an excitation circuit 5, a conductor 6, and an electromagnetic coil 7. The amorphous alloy vibrating wire 2 is tensioned on the front and rear end seats 1 by clamping or welding, and the excitation is completed through a weak excitation circuit 5. When the measured component generates strain, the end seat 1 of the vibrating wire strain gauge fixed on the measured component generates a certain strain, which is converted into the deformation of the internal amorphous alloy vibrating wire 2, thereby changing the basic natural frequency of the vibrating wire 2. The conductor 6 on the vibrating wire 2 moves relative to the electromagnetic coil 7, and the changing vibration frequency of the strain gauge is measured. The obtained frequency signal is transmitted to the external display instrument through the transmission cable 4, and the strain of the measured component can be obtained by calculation.

[0067] Figure 5 The X-ray diffraction patterns of the alloy wires prepared in Comparative Examples 2 to 7 are shown. As shown in the figure, the surface of the alloy wire is subjected to X-ray diffraction using a Rigaku X-ray diffractometer equipped with a Cu-Kα radiation source, and its sharp Bragg scattering peak indicates that the material is crystallized.

[0068] Example 1

[0069] In this example, zirconium-cobalt-iron-nickel-chromium amorphous alloy wires are prepared by water spinning to prepare amorphous alloy vibrating strings.

[0070] The preparation process characteristics of zirconium-cobalt-iron-nickel-chromium amorphous alloy wire are as follows: the specific composition Zr 49 Co 25 Fe 12 Ni9Cr5 amorphous alloy. This alloy has good forming ability, high yield strength and low Young's modulus. According to the mass ratio of the alloy elements, the accurately weighed alloy element raw materials are treated to remove the surface oxide layer and then placed in the crucible of the vacuum arc furnace. Further, the vacuum arc furnace cavity is evacuated to a vacuum of not less than 3×10 -3 Pa vacuum degree, and then use electric arc to repeatedly melt the raw materials until an alloy ingot with uniform composition is formed. The alloy ingot is placed in a quartz tube with a lower opening diameter of 0.3mm, and fixed in a high vacuum single-roller quenching and spray-casting equipment. The distance between the quartz tube nozzle and the copper rod is 15cm. The alloy ingot is heated by induction to molten metal liquid, and the temperature is not less than 1800℃. 1MPa argon gas is filled to control the injection pressure of the molten metal to ensure the diameter and surface quality of the amorphous wire finally formed. The molten metal is sprayed through the nozzle in the form of a thin stream onto the high-speed rotating copper wheel, and the injection speed is controlled at 10m / s. Under the action of water cooling (>10 6 K / s), the surface of the molten alloy is rapidly cooled and drawn into a slender wire by the liquid metal flowing inside, and finally gradually stabilizes to form an amorphous alloy wire with a diameter of 130μm.

[0071] like Figure 1 As shown in Figure 2, the amorphous state of the wire is confirmed by X-ray diffraction, that is, there is no obvious diffraction peak. The mechanical properties of the material are evaluated by quasi-static tensile testing, such as Figure 2 As shown, the Zr 49 Co 25 Fe 12 The yield strength of the Ni9Cr5 amorphous alloy is about 3200 MPa, the Young's modulus is about 142.2 GPa, and the Poisson's ratio is about 0.3.

[0072] Example 2

[0073] In this example, a zirconium-cobalt-iron-nickel-chromium amorphous alloy wire is prepared by water spinning, and the wire is used to prepare an amorphous alloy vibrating wire. The amorphous alloy material is composed of the following elements in atomic proportions: Zr 50%, Co 23%, Fe 14%, Ni 7% and Cr 6%.

[0074] The preparation and characterization steps of the amorphous alloy wire in this embodiment refer to those in Embodiment 1, wherein the induction heating temperature is not less than 1730° C., and the diameter of the prepared amorphous wire is 135 μm.

[0075] Example 3

[0076] In this example, a zirconium-cobalt-iron-nickel-silicon amorphous alloy wire is prepared by water spinning, and the wire is used to prepare an amorphous alloy vibrating string. The amorphous alloy material is composed of the following elements in atomic proportions: Zr 53%, Co 17%, Fe 14%, Ni 9% and Si7%.

[0077] The preparation and characterization steps of the amorphous alloy wire in this embodiment refer to those of Embodiment 1, wherein the induction heating temperature is not less than 1690° C., and the diameter of the prepared amorphous wire is 125 μm.

[0078] Example 4

[0079] In this example, a zirconium-cobalt-iron-nickel-silicon amorphous alloy wire is prepared by water spinning, and the wire is used to prepare an amorphous alloy vibrating string. The amorphous alloy material is composed of the following elements in atomic proportions: Zr 45%, Co 23%, Fe 18%, Ni 8% and Si 6%.

[0080] The preparation and characterization steps of the amorphous alloy wire in this embodiment refer to those in Embodiment 1, wherein the induction heating temperature is not less than 1660° C., and the diameter of the prepared amorphous wire is 120 μm.

[0081] Example 5

[0082] In this example, a zirconium-cobalt-iron-nickel-boron amorphous alloy wire is prepared by water spinning, and the wire is used to prepare an amorphous alloy vibrating string. The amorphous alloy material is composed of the following elements in atomic proportions: Zr 57%, Co 22%, Fe 13%, Ni 6% and B2%.

[0083] The preparation and characterization steps of the amorphous alloy wire in this embodiment refer to those of Embodiment 1, wherein the induction heating temperature is not less than 1750° C., and the diameter of the prepared amorphous wire is 145 μm.

[0084] Example 6

[0085] In this example, a zirconium-cobalt-iron-nickel-boron amorphous alloy wire is prepared by water spinning, and the wire is used to prepare an amorphous alloy vibrating wire. The amorphous alloy material is composed of the following elements in atomic proportions: Zr 43%, Co 26%, Fe 18%, Ni 9% and B4%.

[0086] The preparation and characterization steps of the amorphous alloy wire in this embodiment refer to those of Embodiment 1, wherein the induction heating temperature is not less than 1700° C., and the diameter of the prepared amorphous wire is 127 μm.

[0087] Example 7

[0088] In this example, a zirconium-cobalt-iron-nickel-sulfur amorphous alloy wire is prepared by water spinning, and the wire is used to prepare an amorphous alloy vibrating string. The amorphous alloy material is composed of the following elements in atomic proportions: Zr 53%, Co 18%, Fe 16%, Ni 11% and S2%.

[0089] The preparation and characterization steps of the amorphous alloy wire in this embodiment refer to those in Embodiment 1, wherein the induction heating temperature is not less than 1660° C., and the diameter of the prepared amorphous wire is 151 μm.

[0090] Example 8

[0091] In this example, a zirconium-cobalt-iron-nickel-sulfur amorphous alloy wire is prepared by water spinning, and the wire is used to prepare an amorphous alloy vibrating string. The amorphous alloy material is composed of the following elements in atomic proportions: Zr 49%, Co 23%, Fe 16%, Ni 9% and S3%.

[0092] The preparation and characterization steps of the amorphous alloy wire in this embodiment refer to those of Embodiment 1, wherein the induction heating temperature is not less than 1640° C., and the diameter of the prepared amorphous wire is 150 μm.

[0093] Example 9

[0094] In this example, a zirconium-cobalt-iron-nickel amorphous alloy wire is prepared by water spinning, and the wire is used to prepare an amorphous alloy vibrating wire. The amorphous alloy material is composed of the following elements in atomic proportions: Zr 53%, Co 21%, Fe 13% and Ni 13%.

[0095] The preparation and characterization steps of the amorphous alloy wire in this embodiment refer to those of Embodiment 1, wherein the induction heating temperature is not less than 1820° C., and the diameter of the prepared amorphous wire is 130 μm.

[0096] Example 10

[0097] In this example, a zirconium-cobalt-iron-nickel-chromium amorphous alloy wire is used as a vibrating wire to prepare a novel vibrating wire strain gauge of this embodiment.

[0098] Figure 3 and Figure 4 The structure and appearance of the amorphous zirconium-cobalt-iron-nickel-chromium alloy vibrating wire strain gauge of this embodiment are shown respectively. Among them, the amorphous alloy vibrating wire 2 selects the composition of embodiment 1. 49 Co 25 Fe12 The diameter of Ni9Cr5 amorphous alloy wire is 130μm, the length is 200mm, the tensile yield strength is 3200MPa, and the Young's modulus is 142.2GPa.

[0099] The amorphous alloy vibrating string 2 is tensioned on the front and rear end seats 1 by clamping, and the excitation is completed through the weak excitation circuit 5. When the component under test generates strain, the end seat 1 of the vibrating string strain gauge fixed on the component under test generates a certain strain, which is converted into the deformation of the internal amorphous alloy vibrating string 2, thereby changing the basic natural frequency of the vibrating string 2. The conductor 6 on the vibrating string 2 moves relative to the electromagnetic coil 7, and the changing vibration frequency of the strain gauge is measured. The obtained frequency signal is transmitted to the external display instrument through the transmission cable 4, and the strain of the component under test can be obtained by calculation.

[0100] The vibrating wire strain gauge is mounted on the calibration equipment, and a weak excitation current is passed to obtain the initial vibration frequency f0 = 1157 Hz of the vibrating wire. i =500με, apply pressure to the end seat on one side of the strain gauge until the target range is 3000με, and then unload the pressure to 0 with the same step size. Repeat the whole process for more than 3 times to obtain ε i -f i The data are shown in Table 2. Referring to the calibration specification (GB / T 13606-2007), according to the corresponding formula, it can be obtained that the amorphous alloy vibrating wire strain gauge of this embodiment has a resolution of 0.02% FS, a sensitivity of 2.7 Hz / με, a repeatability deviation of 0.1% FS, a linear error of 0.1% FS and a hysteresis of 0.5% FS at a range of 3000με.

[0101] Under no pressure loading, the vibrating wire strain gauge is heated to 80℃ and stored for 12 hours, and then placed in a -20℃ environmental box for 12 hours after cooling. During the whole process, the fluctuation of the strain gauge output frequency is kept within 0.01% FS, so the applicable temperature range of the strain gauge is -20℃-80℃.

[0102] Therefore, the amorphous alloy vibrating wire strain gauge in this example can provide high-response, high-precision, and stable strain measurement within a high range due to its excellent resolution, sensitivity, linearity, repeatability, and hysteresis, which is significantly superior to similar vibrating wire strain gauges currently available on the market.

[0103] Comparative Example 1

[0104] Commercial vibrating wire materials are usually made of NP010 steel wire, which is prepared by a stretching method. In this comparative example, NP010 steel wire is used as a vibrating wire to prepare a vibrating wire strain gauge, and the performance is compared with the vibrating wire strain gauge of the present invention. Among them, the tensile yield strength of NP010 steel wire is 2100MPa, the Young's modulus is 220GPa, the diameter is 200μm, and the length is 200mm.

[0105] The commercial vibrating wire strain gauge was installed on the calibration equipment, and the performance test was carried out according to the same steps as in Example 10. According to calculation, the wire strain gauge of the comparative example has a resolution of 0.5% FS, a sensitivity of 1.74 Hz / με, a repeatability deviation of 0.2% FS, a linear error of 1.0% FS, and a hysteresis of 0.5% FS at a range of 1000 με. Its range, accuracy, and sensitivity are far lower than those of the amorphous alloy vibrating wire strain gauge of the present invention.

[0106] Comparative Example 2

[0107] This comparative example shows an alloy wire prepared by water spinning, which is used to prepare an alloy vibrating wire. The alloy material is composed of the following elements in atomic percentages: Ti 53%, Co 21%, Fe 13% and Ni 13%.

[0108] The preparation and characterization steps of the alloy wire in this comparative example refer to Example 1. The induction heating temperature is not less than 1820° C., and the diameter of the prepared alloy wire is 47 μm.

[0109] Ti of this comparative example 53 Co 21 Fe 13 Ni 13 The alloy has a yield strength of 900MPa and a Young's modulus of 200GPa. Figure 5 As shown, X-ray diffraction confirmed that the wire was obviously crystallized, and there may be a large number of defects such as crystal planes and phase changes.

[0110] Comparative Example 3

[0111] This comparative example shows an alloy wire prepared by water spinning, which is used to prepare a vibrating wire. The alloy material is composed of the following elements in atomic percentages: Zr 73%, Co 12%, Fe 9% and Ni 6%.

[0112] The preparation and characterization steps of the alloy wire in this comparative example refer to Example 1. The induction heating temperature is not less than 1820° C., and the diameter of the prepared alloy wire is 70 μm.

[0113] The Zr 73 Co 12 Fe9Ni6 alloy has a yield strength of 600MPa and a Young's modulus of 170GPa. Figure 5 As shown, X-ray diffraction confirmed that the wire was obviously crystallized, and there may be a large number of defects such as crystal planes and phase changes.

[0114] Comparative Example 4

[0115] This comparative example shows an alloy wire prepared by water spinning, which is used to prepare a vibrating wire. The alloy material is composed of the following elements in atomic percentages: Zr 41%, Co 19%, Fe 15%, Ni 11% and Cr 14%.

[0116] The preparation and characterization steps of the alloy wire in this comparative example refer to Example 1. The induction heating temperature is not less than 1570° C., and the diameter of the prepared alloy wire is 90 μm.

[0117] The Zr 41 Co 19 Fe 15 Ni 11 Cr 14 The alloy has a yield strength of 1100MPa and a Young's modulus of 164GPa. Figure 5 As shown, X-ray diffraction confirmed that the wire was obviously crystallized, and there may be a large number of defects such as crystal planes and phase changes.

[0118] Comparative Example 5

[0119] This comparative example shows an alloy wire prepared by water spinning, which is used to prepare a vibrating wire. The alloy material is composed of the following elements in atomic percentages: Zr 44%, Co 21%, Fe 17%, Ni 7% and Si 11%.

[0120] The preparation and characterization steps of the alloy wire in this comparative example refer to Example 1. The induction heating temperature is not less than 1760° C., and the diameter of the prepared alloy wire is 80 μm.

[0121] The Zr 44 Co 21 Fe 17 Ni7Si 11 The alloy has a yield strength of 1200MPa and a Young's modulus of 214GPa. Figure 5 As shown, X-ray diffraction confirmed that the wire was obviously crystallized, and there may be a large number of defects such as crystal planes and phase changes.

[0122] Comparative Example 6

[0123] This comparative example shows an alloy wire prepared by water spinning, which is used to prepare a vibrating wire. The alloy material is composed of the following elements in atomic percentages: Zr 53%, Co 17%, Fe 14%, Ni 7% and B 9%.

[0124] The preparation and characterization steps of the alloy wire in this comparative example refer to Example 1. The induction heating temperature is not less than 1800° C., and the diameter of the prepared alloy wire is 110 μm.

[0125] The Zr 53 Co 17 Fe 14 Ni7B9 alloy has a yield strength of 1400MPa and a Young's modulus of 200GPa. Figure 5 As shown, X-ray diffraction confirmed that the wire was obviously crystallized, and there may be a large number of defects such as crystal planes and phase changes.

[0126] Comparative Example 7

[0127] This comparative example shows an alloy wire prepared by water spinning, which is used to prepare a vibrating wire. The alloy material is composed of the following elements in atomic percentages: Zr 47%, Co 21%, Fe 15%, Ni 11% and S 6%.

[0128] The preparation and characterization steps of the alloy wire in this comparative example refer to Example 1. The induction heating temperature is not less than 1800° C., and the diameter of the prepared alloy wire is 110 μm.

[0129] The Zr 47 Co 21 Fe 15 Ni 11 The yield strength of S6 alloy is 1100MPa and Young's modulus is 246GPa. Figure 5 As shown, X-ray diffraction confirmed that the wire was obviously crystallized, and there may be a large number of defects such as crystal planes and phase changes.

[0130] Table 1 shows the material properties and sensitivity properties of the vibrating wires of Examples 1-9 of the present invention and Comparative Examples 1-7.

[0131] Table 1

[0132]

[0133]

[0134] Table 2 shows the calibration test data of the amorphous alloy vibrating wire according to Example 10 of the present invention.

[0135]

Claims

1. A Zr-based amorphous alloy material, comprising Zr, Co, Fe and Ni, and the atomic ratio of Zr, Co, Fe and Ni is: Zr:Co:Fe:Ni=(32~57):(12~26):(6~18):(6~13).

2. The Zr-based amorphous alloy material according to claim 1, wherein: The Zr-based amorphous alloy material further contains Cr, and the atomic ratio of Zr, Co, Fe, Ni and Cr is: Zr:Co:Fe:Ni:Cr=(32~51):(12~26):(6~18):(6~12):(>0~7).

3. The Zr-based amorphous alloy material according to claim 1, wherein: The Zr-based amorphous alloy material further contains Si, and the atomic ratio of Zr, Co, Fe, Ni and Si is: Zr:Co:Fe:Ni:Si=(32~55):(12~26):(6~18):(6~9):(>0~8).

4. The Zr-based amorphous alloy material according to claim 1, wherein: The Zr-based amorphous alloy material further contains B, and the atomic ratio of Zr, Co, Fe, Ni and B is: Zr:Co:Fe:Ni:B=(32~57):(12~26):(6~18):(6~9):(>0~5).

5. The Zr-based amorphous alloy material according to claim 1, wherein: The Zr-based amorphous alloy material further contains S, and the atomic ratio of Zr, Co, Fe, Ni and S is: Zr:Co:Fe:Ni:S=(32~55):(12~26):(6~18):(6~12):(>0~3).

6. Use of the Zr-based amorphous alloy material according to any one of claims 1 to 5 in a vibrating-wire strain gauge.

7. A vibrating wire, which is composed of the Zr-based amorphous alloy material according to any one of claims 1 to 5.

8. A vibrating wire strain gauge comprising the vibrating wire according to claim 7.

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