Amorphous alloy, amorphous alloy working tip and preparation method and application of amorphous alloy working tip

Abstract

The invention provides an amorphous alloy, an amorphous alloy work tip and a preparation method and application of the amorphous alloy work tip, and relates to the technical field of medical materials, the amorphous alloy is composed of Fe, Nb, B and Ti, the amorphous alloy comprises 8 wt%-15 wt% of Nb, 25 wt%-35 wt% of B, 4 wt%-8 wt% of Ti and the balance Fe, and the amorphous alloy work tip is prepared through the amorphous alloy. The prepared amorphous alloy containing Fe, Nb, B and Ti is good in mechanical property, the hardness reaches 2000 Hv or above, the amorphous alloy is greatly superior to existing martensitic stainless steel and other materials, meanwhile, the good anti-fatigue performance is achieved, and the service life is 250 h or above. Meanwhile, the prepared amorphous alloy containing Fe, Nb, B and Ti is good in corrosion resistance, the ion dissolution capacity is equivalent to that of stainless steel, and good biological safety is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of medical materials, and in particular to an amorphous alloy, an amorphous alloy working tip, and a preparation method and application thereof. Background Art

[0002] Ultrasonic bone scalpel is a medical device that uses high-intensity focused ultrasound technology to perform precise bone cutting in orthopedic surgery. It converts electrical energy into mechanical energy through a transducer, generating high-frequency ultrasonic oscillations, which vaporize water in the contacted bone tissue cells and break protein hydrogen bonds, thereby completely destroying the bone tissue. This technology is widely used in multiple departments, including spinal surgery, neurosurgery, bone tumors, etc., and is particularly suitable for high-precision surgeries such as minimally invasive spinal surgery, craniotomy, and fracture repair. The ultrasonic bone scalpel has selective cutting capabilities and can accurately cut bone tissue without damaging surrounding soft tissues such as blood vessels and nerves. At the same time, it generates almost no heat during the cutting process, keeping the temperature of the blade below 38°C, reducing thermal damage to surrounding tissues and maintaining a clear surgical field of view.

[0003] However, ultrasonic bone scalpels face some challenges in practical applications, mainly the low cutting efficiency of the working tip and the tendency of fatigue cracks to form on the working tip under high-frequency oscillation, leading to abnormal fractures and affecting surgical results and patient safety. Although the currently used materials such as martensitic stainless steel and Ti-6Al-4V titanium alloy have good biocompatibility, they are deficient in hardness, fatigue performance and wear resistance, resulting in cutting efficiency and service life that cannot meet clinical needs. Therefore, the development of new high-hardness, long-life materials and their preparation methods is crucial to improving the performance and reliability of ultrasonic bone scalpels. Summary of the invention

[0004] The present application provides an amorphous alloy, an amorphous alloy working tip, and a preparation method and application thereof to solve the above-mentioned problems existing in the prior art.

[0005] In a first aspect, the present application proposes an amorphous alloy, which is composed of Fe, Nb, B and Ti, and the amorphous alloy includes 8wt%~15wt% Nb, 25wt%~35wt% B, 4wt%~8wt% Ti, and the balance is Fe.

[0006] In an optional embodiment, the amorphous alloy includes 8wt%~10wt% Nb, 25wt%~29wt% B, 4wt%~6wt% Ti, and the balance is Fe.

[0007] In an optional embodiment, the amorphous alloy includes 9 wt % Nb, 27 wt % B, 5 wt % Ti and 59 wt % Fe.

[0008] In a second aspect, the present application provides an amorphous alloy working tip, wherein the amorphous alloy working tip is prepared by using the amorphous alloy described in any one of the first aspects above.

[0009] In an optional embodiment, the amorphous alloy working tip has a compressive strength ranging from 2620 MPa to 3250 MPa, a compressive deformation ranging from 4% to 5%, a hardness ranging from 2250 Hv to 2600 Hv, and a fatigue life ranging from 255 h to 320 h.

[0010] In an optional embodiment, the Fe ion dissolution range of the amorphous alloy working tip is 0.2 μg / dm 2 -1.5 μg / dm 2 .

[0011] In a third aspect, the present application provides a method for preparing an amorphous alloy working tip as described in any one of the second aspects above, the method comprising the following steps: Step 1: Obtain Nb, B, Ti and Fe according to the following mass percentages, and obtain an amorphous alloy ingot by vacuum consumable smelting of Nb, B, Ti and Fe three times, wherein the mass percentages are: Nb is 8% to 15%, B is 25% to 35%, Ti is 4% to 8%, and the balance is Fe; Step 2: performing vacuum suction casting on the amorphous alloy ingot to prepare an amorphous alloy rod; Step 3: Processing the amorphous alloy rod by a machining method to prepare an amorphous alloy working tip.

[0012] In an optional embodiment, in step 2, the vacuum suction casting is performed by water-cooled copper crucible suction casting, and the vacuum suction casting is performed in an argon environment of 0.05 MPa.

[0013] In an optional embodiment, in step 2, the diameter of the amorphous alloy rod is 3 mm-5 mm.

[0014] In a fourth aspect, an embodiment of the present application proposes an application of an amorphous alloy working tip, wherein the amorphous alloy working tip is used as a working tip of an ultrasonic bone knife, a surgical knife, or a rotary cutter.

[0015] The present application has the following advantages: The present application proposes an amorphous alloy, an amorphous alloy working tip, and a preparation method and application thereof, wherein the amorphous alloy is composed of Fe, Nb, B and Ti, and the amorphous alloy includes 8wt% to 15wt% Nb, 25wt% to 35wt% B, 4wt% to 8wt% Ti, and the remainder is Fe. The amorphous alloy working tip is prepared by using the amorphous alloy. The advantages are as follows: 1) The amorphous alloy containing Fe, Nb, B and Ti prepared in this application has good mechanical properties and a hardness of more than 2000 Hv, which is much better than existing martensitic stainless steel and other materials. It also has good fatigue resistance and a service life of more than 250 hours. 2) The amorphous alloy containing Fe, Nb, B and Ti prepared in this application has good corrosion resistance, an ion dissolution capacity comparable to that of stainless steel, and good biosafety; 3) The amorphous alloy containing Fe, Nb, B and Ti prepared in the present application does not contain harmful elements that are toxic to the human body and has good biological safety; 4) The amorphous alloy containing Fe, Nb, B and Ti prepared in the present application does not contain precious or rare elements and has a low manufacturing cost.

[0016] 5) The amorphous alloy containing Fe, Nb, B and Ti prepared in this application has good technical application and market prospects in the biomedical field, especially in the field of ultrasonic bone knife working tips. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] The ultrasonic bone scalpel uses high-intensity focused ultrasound technology to convert electrical energy into mechanical energy through a transducer. Through high-frequency ultrasonic vibrations, the water in the contacted tissue cells is vaporized and the protein hydrogen bonds are broken, thereby completely destroying the bone tissue that needs to be cut during surgery. When in use, the temperature of the ultrasonic scalpel head is lower than 38°C and the surrounding propagation distance is less than 200 microns. Since this high-intensity focused ultrasound only has a destructive effect on bone tissue of a specific hardness, it will not only not damage blood vessels and nerve tissues, but also stop bleeding at the surgical wound, further reducing the incision of minimally invasive surgery, greatly improving the accuracy, reliability and safety of the surgery.

[0019] The ultrasonic bone knife working tip is the output part of the ultrasonic bone knife, which directly acts on the surface of bone tissue. In actual application, the cutting efficiency of the working tip is low, resulting in long surgery time and poor patient experience. In addition, during the cutting process, due to the high-frequency oscillation caused by ultrasound, the working tip is subjected to high-cycle fatigue with high stress, and fatigue cracks are very easy to initiate and expand. Abnormal fracture of the working tip during the treatment process not only affects the treatment effect and the patient's surgical experience, but also brings unnecessary surgical risks.

[0020] The main problem restricting the improvement of ultrasonic bone knife performance is the insufficient material performance, which is also the core problem faced by the upgrading of ultrasonic bone knife working tips. The martensitic stainless steel and Ti-6Al-4V titanium alloy currently in practical use have good biocompatibility, but low hardness, and relatively poor high-cycle fatigue performance and wear resistance. In actual applications, the cutting efficiency is not high, and wear and fatigue fracture often occur. Therefore, it is urgent to develop a high-hardness and long-life material for the working tip, and improve the corresponding preparation method to meet the urgent needs of the working tip for high efficiency and long life.

[0021] In a first aspect, an embodiment of the present application proposes an amorphous alloy composed of Fe (iron), Nb (niobium), B (boron) and Ti (titanium), wherein the amorphous alloy includes 8wt%~15wt% of Nb, 25wt%~35wt% of B, 4wt%~8wt% of Ti, and the balance is Fe.

[0022] Among them, the Nb content can be 8wt%, 9wt%, 10wt%, 11wt%, 12wt%, 13wt%, 14wt%, 15wt% and the like; the B content can be 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, 30wt%, 31wt%, 32wt%, 33wt%, 34wt%, 35wt% and the like; the Ti content can be 4wt%, 5wt%, 6wt%, 7wt%, 8wt% and the like; and the balance is Fe.

[0023] In one example, the amorphous alloy may include 8 wt % Nb, 25 wt % B, 4 wt % Ti, and 63 wt % Fe.

[0024] In one example, the amorphous alloy may include 9 wt % Nb, 26 wt % B, 5 wt % Ti, and 60 wt % Fe.

[0025] In one example, the amorphous alloy may include 10 wt % Nb, 27 wt % B, 6 wt % Ti, and 57 wt % Fe.

[0026] In one example, the amorphous alloy may include 11 wt % Nb, 28 wt % B, 7 wt % Ti, and 54 wt % Fe.

[0027] In one example, the amorphous alloy may include 12 wt % Nb, 29 wt % B, 8 wt % Ti, and 51 wt % Fe.

[0028] In one example, the amorphous alloy may include 15 wt % Nb, 35 wt % B, 8 wt % Ti, and 52 wt % Fe.

[0029] It can be seen that in this amorphous alloy, Fe is used as the matrix element. Due to the characteristics of Fe itself, the hardness value of Fe is usually between 80-650 HB (Brinell hardness), and the tensile strength of Fe is usually between 370-550 MPa. The strength of Fe changes with the treatment form and treatment process of iron. For example, the hardness of pure Fe is low, but the hardness of quenched high-carbon steel can reach above HRC60. Fe can determine the strength and hardness of the overall material. In addition, the addition of Nb element can form a Nb2O5 passivation film on the surface of the amorphous alloy, which has good corrosion resistance and greatly reduces the ion dissolution ability. At the same time, Ti is a passivating metal, and a TiO2 passivation film is easily formed on the surface, which is coupled with the Nb2O5 passivation film formed by the Nb element, greatly reducing the ion dissolution rate. The above components can greatly improve the hardness and corrosion resistance of the amorphous alloy.

[0030] In a preferred embodiment, the amorphous alloy includes 8wt% to 10wt% Nb, 25wt% to 29wt% B, 4wt% to 6wt% Ti, and the balance is Fe.

[0031] In one example, the amorphous alloy may include 10 wt % Nb, 29 wt % B, 6 wt % Ti, and 55 wt % Fe.

[0032] In a preferred embodiment, the amorphous alloy includes 9 wt % Nb, 27 wt % B, 5 wt % Ti and 59 wt % Fe.

[0033] In another preferred embodiment, the amorphous alloy includes 10 wt % Nb, 25 wt % B, 6 wt % Ti and 59 wt % Fe.

[0034] In an optional embodiment, the amorphous alloy can be represented as follows: Fe a Nb b B c Ti d , abcd is the mass percentage of each element in the amorphous alloy, a+b+c+d=100%, the mass percentage of each element: 52%≤a≤63%, 8%≤b≤15%, 25%≤c≤35%, 4%≤d≤8%.

[0035] Optionally, the composition of the amorphous alloy is Fe 59 Nb9 27 Ti5、Fe 59 Nb 10 B 25 Ti6、Fe 59 8B 29 Ti4、Fe 53 8B35 Ti4、Fe 52 Nb 15 B 25 At least one of Ti8.

[0036] In a second aspect, an embodiment of the present application provides an amorphous alloy working tip, which is prepared by using the amorphous alloy described in any one of the first aspects above.

[0037] In an optional embodiment, the compressive strength of the amorphous alloy working tip ranges from 2620 MPa to 3250 MPa, the compressive deformation ranges from 4% to 5%, the hardness ranges from 2250 Hv to 2600 Hv, and the fatigue life ranges from 255 h to 320 h.

[0038] It can be seen that the mechanical properties of the amorphous alloy working tip are excellent, and the hardness can reach more than 2000 Hv, which greatly improves the hardness of the existing martensitic stainless steel. At the same time, the amorphous alloy working tip has good fatigue resistance and a service life of more than 255 h.

[0039] The amorphous alloy used to prepare the amorphous alloy working tip does not contain any harmful elements that are toxic to the human body, and has good biological safety. It also does not contain any precious or rare elements, and has a low manufacturing cost.

[0040] In an optional embodiment, the Fe ion dissolution range of the amorphous alloy working tip is 0.2 μg / dm 2 -1.5 μg / dm 2 The ions of other elements were not dissolved, and the ion dissolution amount of the amorphous gold alloy working tip was comparable to that of martensitic stainless steel, indicating that the amorphous alloy working tip prepared from the amorphous alloy had good corrosion resistance and good biosafety.

[0041] In a third aspect, an embodiment of the present application provides a method for preparing an amorphous alloy working tip as described in any one of the second aspects above, the method comprising the following steps: Step 1: Obtain Nb, B, Ti and Fe according to the following mass percentages, and obtain an amorphous alloy ingot by vacuum consumable smelting of Nb, B, Ti and Fe three times, wherein the mass percentages are: Nb is 8% to 15%, B is 25% to 35%, Ti is 4% to 8%, and the balance is Fe; Step 2: performing vacuum suction casting on the amorphous alloy ingot to prepare an amorphous alloy rod; Step 3: Processing the amorphous alloy rod by a machining method to prepare an amorphous alloy working tip.

[0042] Among them, the vacuum consumable melting in the above steps is a metal melting technology carried out in a vacuum environment. In this process, the molten material serves as an electrode, and the water-cooled copper crucible serves as another electrode, and the material is melted by the high temperature of the arc. The molten metal is gradually condensed into an ingot. This method can significantly improve the uniformity of the amorphous alloy, reduce the inclusion content, and help remove volatile impurities.

[0043] Vacuum suction casting is a casting method that creates a vacuum in the mold cavity, allowing the molten metal to fill the mold cavity from bottom to top under the action of negative pressure and solidify. This method can effectively reduce the pores and defects of the casting, ensure the density and uniformity of the casting, and improve the quality of the casting.

[0044] The machining method is to perform cutting, grinding and other processing on the formed metal materials to obtain the desired shape and size. When processing amorphous alloy bars, the machining methods used include milling, turning and grinding, etc. The above methods can ensure the accuracy and surface quality of the amorphous alloy working tip to meet specific application requirements. In the embodiment of the present application, the above machining method adopts a method of machine tool combined with tool turning. The specific operation is a common machining operation, which will not be repeated here.

[0045] Through the above steps, an amorphous alloy working tip that meets the requirements can be effectively prepared, and its performance and reliability in subsequent applications can be ensured.

[0046] In the above step 1, the conditions for the three vacuum consumable melting selected in the embodiment of the present application are: processing in an environment with a vacuum degree not higher than 1 Pa and a temperature greater than 2500° C.

[0047] In the above step 2, the vacuum casting process is water-cooled copper crucible casting, and the vacuum casting is carried out in an argon environment of 0.05 MPa, specifically, in an argon environment of 0.5 atmospheres in the melt zone and a vacuum environment of less than 1 Pa in the casting zone. In the above step 2, the diameter of the prepared amorphous alloy rod is 3 mm-5 mm, which can be 3 mm, 4 mm and 5 mm. Amorphous alloy rods with a diameter of 3 mm-5 mm have the ability to form an amorphous structure, and amorphous alloy rods with a smaller diameter are not easy to form an amorphous structure.

[0048] In the embodiment of the present application, a small amount of Ti is added to the amorphous system containing only Fe, Nb, and B. The atomic diameter of Ti is quite different from that of Fe, Nb, and B, which improves the amorphous forming ability and can realize the preparation of amorphous rods with a diameter of 5 mm. Compared with the amorphous system containing only Fe, Nb, and B, the rod diameter is increased by more than 400%, reaching the size specifications required for the preparation of the working tip; in addition, Ti is a passivation metal, and a TiO2 passivation film is easily formed on the surface, which is mutually coupled with the Nb2O5 passivation film formed by the Nb element, greatly reducing the ion dissolution rate. In addition, the amorphous alloy working tip prepared in the embodiment of the present application uses Fe as the matrix material, which is the basis of the high strength and high hardness of the overall amorphous alloy working tip; the atomic radius of B atoms is quite different from that of Fe atoms, which is one of the foundations of the amorphous system and improves the amorphous forming ability; the addition of Nb elements, on the one hand, has a large difference in atomic radius from Fe and B atoms, which is the basis of the amorphous system. In addition, the addition of Nb elements can form a Nb2O5 passivation film on the surface of the amorphous alloy, which has good corrosion resistance and greatly reduces the ion dissolution ability.

[0049] Since the working tip of the ultrasonic bone knife directly acts on the surface of bone tissue, the cutting efficiency of the working tip is low, resulting in a long operation time and poor patient experience. In addition, the working tip will be subjected to high-stress high-cycle fatigue, and fatigue cracks are very easy to initiate and expand. The amorphous alloy working tip prepared in this application not only has ultra-high hardness, but also has good fatigue resistance.

[0050] Therefore, based on the same application concept, the embodiment of the present application also proposes an application of an amorphous alloy working tip, which is used as an ultrasonic bone knife or a medical tool with the same requirements as an ultrasonic bone knife, such as a scalpel or a rotary cutter. At the same time, the amorphous alloy can also be used for minimally invasive instruments, biomedical implants, wrist joint implants, medical instruments (such as medical sutures), etc.

[0051] Since scalpels or dental tool components require high precision, high strength, high elasticity, high hardness, scratch resistance, corrosion resistance and other properties, and a long service life, amorphous alloy working tips are also very suitable for medical devices such as scalpels or tool components.

[0052] Next, the preparation method and performance of an amorphous alloy working tip proposed in the embodiment of the present application are described through the following examples. The materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained from commercial channels. The percentages used in the following examples, unless otherwise specified, are all weight percentages.

[0053] Example 1 An amorphous alloy working tip includes the following components in mass percentage: 9% Nb, 27% B, 5% Ti, and the balance is Fe, which can be expressed as Fe 59Nb9 27 Ti5.

[0054] The manufacturing method of the amorphous alloy working tip specifically includes: Step 1: Obtain Nb, B, Ti and Fe according to the following mass percentages, and obtain an amorphous alloy ingot by vacuum consumable melting of Nb, B, Ti and Fe three times, wherein the mass percentages are: 9% Nb, 27% B, 5% Ti, and the remainder is Fe, wherein the above Nb, B, Ti and Fe are selected as pure metals or intermediate alloys corresponding to each element, and vacuum consumable melting is performed in an environment of a vacuum degree not higher than 1 Pa and greater than 2500° C. to obtain an amorphous alloy ingot; Step 2: in an argon environment of 0.5 atmospheres in the melt zone and a vacuum environment of less than 1 Pa in the suction casting zone, the amorphous alloy ingot is treated by suction casting with a water-cooled copper crucible to prepare an amorphous alloy rod; Step 3: The amorphous alloy rod is processed by a machining method to prepare an amorphous alloy working tip.

[0055] Embodiment 2: An amorphous alloy working tip includes the following components in mass percentage: 10% Nb, 25% B, 6% Ti, and the balance is Fe, which can be expressed as Fe 59 Nb 10 B 25 Ti6.

[0056] The manufacturing method of the amorphous alloy working tip specifically includes: Step 1: Obtain Nb, B, Ti and Fe according to the following mass percentages, and obtain an amorphous alloy ingot by vacuum consumable melting of Nb, B, Ti and Fe three times, wherein the mass percentages are: 10% Nb, 25% B, 6% Ti, and the remainder is Fe, wherein the above Nb, B, Ti and Fe are selected as pure metals or intermediate alloys corresponding to each element, and vacuum consumable melting is performed in an environment of a vacuum degree not higher than 1 Pa and a temperature greater than 2500° C. to obtain an amorphous alloy ingot; Step 2: in an argon environment of 0.5 atmospheres in the melt zone and a vacuum environment of less than 1 Pa in the suction casting zone, the amorphous alloy ingot is treated by suction casting with a water-cooled copper crucible to prepare an amorphous alloy rod; Step 3: The amorphous alloy rod is processed by a machining method to prepare an amorphous alloy working tip.

[0057] Embodiment 3: An amorphous alloy working tip includes the following components in percentage by mass: 8% Nb, 29% B, 4% Ti, and the balance is Fe, which can be expressed as Fe 59 8B 29 Ti4.

[0058] The manufacturing method of the amorphous alloy working tip specifically includes: Step 1: Obtain Nb, B, Ti and Fe according to the following mass percentages, and obtain an amorphous alloy ingot by vacuum consumable melting of Nb, B, Ti and Fe three times, wherein the mass percentages are: 8% Nb, 29% B, 4% Ti, and the remainder is Fe, wherein the above Nb, B, Ti and Fe are selected as pure metals or intermediate alloys corresponding to each element, and vacuum consumable melting is performed in an environment of a vacuum degree not higher than 1 Pa and a temperature greater than 2500° C. to obtain an amorphous alloy ingot; Step 2: in an argon environment of 0.5 atmospheres in the melt zone and a vacuum environment of less than 1 Pa in the suction casting zone, the amorphous alloy ingot is treated by suction casting with a water-cooled copper crucible to prepare an amorphous alloy rod; Step 3: The amorphous alloy rod is processed by a machining method to prepare an amorphous alloy working tip.

[0059] Embodiment 4: An amorphous alloy working tip includes the following components in percentage by mass: 8% Nb, 35% B, 4% Ti, and the balance is Fe, which can be expressed as Fe 53 8B 35 Ti4.

[0060] The manufacturing method of the amorphous alloy working tip specifically includes: Step 1: Obtain Nb, B, Ti and Fe according to the following mass percentages, and obtain an amorphous alloy ingot by vacuum consumable melting of Nb, B, Ti and Fe three times, wherein the mass percentages are: 8% Nb, 35% B, 4% Ti, and the remainder is Fe, wherein the above Nb, B, Ti and Fe are selected as pure metals or intermediate alloys corresponding to each element, and vacuum consumable melting is performed in an environment of a vacuum degree not higher than 1 Pa and a temperature greater than 2500° C. to obtain an amorphous alloy ingot; Step 2: in an argon environment of 0.5 atmospheres in the melt zone and a vacuum environment of less than 1 Pa in the suction casting zone, the amorphous alloy ingot is treated by suction casting with a water-cooled copper crucible to prepare an amorphous alloy rod; Step 3: The amorphous alloy rod is processed by a machining method to prepare an amorphous alloy working tip.

[0061] Embodiment 5: An amorphous alloy working tip includes the following components in percentage by mass: 15% Nb, 25% B, 8% Ti, and the balance is Fe, which can be expressed as Fe 52 Nb 15 B 25 Ti8.

[0062] The manufacturing method of the amorphous alloy working tip specifically includes: Step 1: Obtain Nb, B, Ti and Fe according to the following mass percentages, and obtain an amorphous alloy ingot by vacuum consumable melting of Nb, B, Ti and Fe three times, wherein the mass percentages are: 15% Nb, 25% B, 8% Ti, and the remainder is Fe, wherein the above Nb, B, Ti and Fe are selected as pure metals or intermediate alloys corresponding to each element, and vacuum consumable melting is performed in an environment of a vacuum degree not higher than 1 Pa and a temperature greater than 2500° C. to obtain an amorphous alloy ingot; Step 2: in an argon environment of 0.5 atmospheres in the melt zone and a vacuum environment of less than 1 Pa in the suction casting zone, the amorphous alloy ingot is treated by suction casting with a water-cooled copper crucible to prepare an amorphous alloy rod; Step 3: The amorphous alloy rod is processed by a machining method to prepare an amorphous alloy working tip.

[0063] Comparative Example 1 An amorphous alloy comprises the following components in percentage by mass: 6% Nb, 23% B, and the balance Fe, which can be expressed as Fe 71 Nb6 23 .

[0064] The method for manufacturing the amorphous alloy specifically comprises: Step 1: Obtain Nb, B, Ti and Fe according to the following mass percentages, and obtain an amorphous alloy ingot by vacuum consumable melting of Nb, B, Ti and Fe three times, wherein the mass percentages are: 6% Nb, 23% B, and the remainder Fe, wherein the above Nb, B and Fe are selected as pure metals or intermediate alloys corresponding to each element, and vacuum consumable melting is performed in an environment of a vacuum degree not higher than 1 Pa and a temperature greater than 2500° C. to obtain an amorphous alloy ingot; Step 2: In an argon environment of 0.5 atmospheres in the melt zone and a vacuum environment of less than 1 Pa in the suction casting zone, the amorphous alloy ingot is treated by suction casting with a water-cooled copper crucible to prepare an amorphous alloy rod.

[0065] Example 6 Taking commercially available 13Cr martensitic stainless steel as comparative example 2, the amorphous alloy working tips prepared in Examples 1 to 5 and comparative examples 1 and 2 were characterized in terms of performance, including amorphous forming ability, mechanical properties and ion dissolution ability, wherein the mechanical properties include compressive strength, compressive deformation, hardness and fatigue life, and the amorphous forming ability was obtained by characterizing the diameter of the amorphous alloy rod prepared in each example.

[0066] Specifically, the diameter of the amorphous alloy rod is measured by XRD (X-ray diffractometer), the compressive yield strength and compressive deformation of the mechanical properties of the above materials are tested by compression experiments; the hardness is tested by a microhardness tester; the fatigue life is measured at a frequency of 30 kHz; the ion dissolution experiment is to immerse the sample in a 3.5% NaCl solution with a pH of 5, and then measure the ion concentration by inductively coupled plasma atomic emission spectrometry and convert it to obtain the ion dissolution concentration.

[0067] It should be noted that the specific experimental steps used in the above characterization experiment are the same as those in conventional techniques and will not be repeated here.

[0068] The characterization results are shown in Tables 1 and 2.

[0069] Table 1 Performance characterization results of Example 1 to Example 6 and Comparative Examples 1 and 2

[0070] Table 2 Performance Characterization Results 2 of Examples 1 to 6 and Comparative Examples 1 and 2

[0071] It can be seen from Table 1 that, compared with 13Cr martensitic stainless steel, the amorphous alloy working tip in the present invention has good mechanical properties, a hardness of more than 2000 Hv, and a maximum of 2600 Hv. It also has good fatigue resistance and a service life of more than 255 h, and a maximum of 320 h.

[0072] Compared with Comparative Example 1, no Ti is added to Comparative Example 1, and only three elements: Fe, Nb and B are included. The preparation method proposed in the embodiment of the present application cannot prepare an amorphous gold alloy working tip. The prepared amorphous alloy rod is characterized, and it can be seen that the diameter of the amorphous alloy rod is only 1 mm, and its amorphous forming ability is insufficient. At the same time, its hardness is only 1800Hv, which makes it impossible to prepare an amorphous alloy working tip. This shows that Ti is very important for the formation of the overall amorphous alloy working tip. This is because the atomic diameter of Ti is quite different from that of Fe, Nb, and B, which improves the amorphous forming ability and can achieve the preparation of amorphous rods with a diameter of 5 mm (as shown in Example 1). Compared with the amorphous system containing Fe, Nb, and B, the rod diameter is increased by more than 400%.

[0073] All the amorphous gold alloy working tips prepared in this application have both high plasticity (compression deformation of 5%) and good fatigue limit when the hardness is higher than 2600 HV, especially the fatigue life is more than 255 h, indicating that the amorphous alloy working tips prepared in this application have high hardness and long service life.

[0074] It can be seen from Table 2 that under the same immersion environment, the Fe ion dissolution amount of the amorphous alloy rod of Comparative Example 1 is 3.5 μg / dm 2 The dissolution amount of Nb ions is 0.03 μg / dm 2 The Fe ion dissolution amount of 13Cr martensitic stainless steel in comparative example 2 is 1.1 μg / dm 2 , the amount of Cr ions released is 0.3 μg / dm 2 , while the amorphous alloy working tip in the embodiment of the present application only dissolves Fe ions, and the dissolution amount is 0.2-1.5 μg / dm 2 The ion dissolution capacity is comparable to that of 13Cr martensitic stainless steel, indicating that the amorphous alloy working tip prepared in the present application has good biosafety. In addition, the amorphous alloy working tip prepared in the present application does not contain harmful elements that are toxic to the human body, further increasing biosafety.

[0075] It can be seen from the characterization results in Table 1 and Table 2 that the performance of the amorphous alloy working tips prepared in Examples 1 and 2 of the present application are both very excellent, among which the amorphous alloy working tip (Fe 59 Nb9 27 Ti5) has a compression strength of 3250 MPa, a compression deformation of 5%, a hardness of 2600 Hv, and a fatigue life of 320 h, which is the best amorphous gold alloy working tip. The amorphous alloy working tip prepared in Example 2 (Fe 59 Nb 10 B 25 Ti6) has a compression strength of 3220 MPa, a compression deformation of 5%, a hardness of 2320 Hv, and a fatigue life of 300 h, making it the preferred amorphous gold alloy working tip.

[0076] Since the amorphous alloy working tip prepared in the embodiment of the present application has a wide range of applications, the amorphous alloy working tip prepared in the embodiment of the present application has extremely high hardness and good elasticity. It is not easy to produce fatigue cracks under high-frequency oscillation, and it is not easy to cause abnormal fractures. It has high cutting efficiency and good surgical effect. The amorphous alloy also has good fatigue resistance and a long service life. It can be seen that the amorphous alloy prepared in the present application has high hardness and long service life at the same time, and the ion dissolution ability of the amorphous alloy is comparable to that of martensitic stainless steel, and it does not contain harmful elements that are toxic to the human body, and has good biological safety. At the same time, the preparation method proposed in the present application is simple, and the elements used to prepare the amorphous alloy do not contain precious and rare elements, and the manufacturing cost is low. Therefore, the amorphous alloy working tip prepared in the embodiment of the present application has good technical applications and market prospects in the biomedical field, especially in the field of ultrasonic bone knife working tips.

[0077] The above descriptions are merely embodiments of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention are equivalent replacement methods and are included in the protection scope of the present invention.

[0078] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0079] The above is a detailed introduction to an amorphous alloy, an amorphous alloy working tip, and a preparation method and application thereof provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An amorphous alloy, characterized in that: The amorphous alloy is composed of Fe, Nb, B and Ti, wherein the amorphous alloy includes 8wt% to 15wt% of Nb, 25wt% to 35wt% of B, 4wt% to 8wt% of Ti, and the balance is Fe.

2. The amorphous alloy according to claim 1, characterized in that: The amorphous alloy includes 8wt% to 10wt% of Nb, 25wt% to 29wt% of B, 4wt% to 6wt% of Ti, and the balance is Fe.

3. The amorphous alloy according to claim 1, characterized in that: The amorphous alloy includes 9 wt % of Nb, 27 wt % of B, 5 wt % of Ti and 59 wt % of Fe.

4. An amorphous alloy working tip, characterized in that: The amorphous alloy working tip is prepared by using the amorphous alloy described in any one of claims 1 to 3.

5. The amorphous alloy working tip according to claim 4, characterized in that: The amorphous alloy working tip has a compressive strength range of 2620 MPa-3250 MPa, a compressive deformation range of 4%-5%, a hardness range of 2250 Hv-2600 Hv, and a fatigue life range of 255 h-320 h.

6. The amorphous alloy working tip according to claim 4, characterized in that: The Fe ion dissolution range of the amorphous alloy working tip is 0.2 μg / dm 2 -1.5 μg / dm 2 .

7. A method for preparing an amorphous alloy working tip according to any one of claims 4 to 6, characterized in that: The method comprises the following steps: Step 1: Obtain Nb, B, Ti and Fe according to the following mass percentages, and obtain an amorphous alloy ingot by vacuum consumable smelting of Nb, B, Ti and Fe three times, wherein the mass percentages are: Nb is 8% to 15%, B is 25% to 35%, Ti is 4% to 8%, and the balance is Fe; Step 2: performing vacuum suction casting on the amorphous alloy ingot to prepare an amorphous alloy rod; Step 3: Processing the amorphous alloy rod by a machining method to prepare an amorphous alloy working tip.

8. The method for preparing an amorphous alloy working tip according to claim 7, characterized in that: In step 2, the vacuum suction casting is performed by water-cooled copper crucible suction casting, and the vacuum suction casting is performed in an argon environment of 0.05 MPa.

9. The method for preparing an amorphous alloy working tip according to claim 7, characterized in that: In step 2, the diameter of the amorphous alloy rod is 3 mm-5 mm.

10. An application of an amorphous alloy working tip, characterized in that: The amorphous alloy working tip is used as a working tip of an ultrasonic bone knife, a surgical knife, and a rotary cutter.

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