Titanium-based amorphous alloy, structural part and method for preparing the structural part

Abstract

The embodiment of the present invention provides a titanium-based amorphous alloy, a structural part and a method for preparing the structural part, which relates to the technical field of amorphous alloys. The titanium-based amorphous alloy has a composition as shown in the following general formula: Ti a Cu b Zr c Hf d Ni e Si f Sn g ; wherein a, b, c, d, e, f and g are all atomic percentages, and the sum of a, b, c, d, e, f and g is 100. The titanium-based amorphous alloy does not contain toxic substances such as Be, which can improve environmental protection. The titanium-based amorphous alloy prepared according to the above proportions and components has the characteristics of high hardness, high tensile strength and low density, and can meet the needs of precision structural parts.

Description

Technical Field

[0001] The present invention relates to the technical field of amorphous alloys, and in particular to a titanium-based amorphous alloy, a structural component and a method for preparing the structural component. Background Art

[0002] Most of the jewelry on the market, such as pendants and bracelets, are made of stainless steel, titanium alloy, aluminum alloy, precious metals and other materials. The density of products made of these materials is high, and the hardness is generally not high, so they need to be hardened. Usually, the process of this type of material is: the first process is the raw material blank molding, the second process is machining, the third process is rough polishing, and the fourth process is fine polishing. The processing technology is complicated, and the materials of these jewelry generally have low hardness and poor wear resistance. They are easily scratched and lose their luster after long-term wear.

[0003] Amorphous alloy is a new type of alloy prepared by rapid cooling. Its atoms are arranged in a topological disordered state in three-dimensional space and connected by metal bonds. There are no ordered crystal planes, crystal directions, grain boundaries, dislocations and twins that are usually present in crystalline alloys, nor are there defects such as segregation and fluctuations in the second phase. The constituent atoms maintain short-range order within the range of several lattice constants, forming a structure similar to an atomic cluster. At the same time, no crystallization occurs during rapid solidification, so it has an atomic arrangement structure similar to that of a liquid. It is precisely because of the special atomic structure of amorphous alloys that it determines its special physical and chemical properties. Compared with traditional crystalline materials, amorphous alloys have high strength, high hardness, low elastic modulus, high wear resistance and high corrosion resistance. Therefore, amorphous alloys can be applied to jewelry to improve the performance of jewelry.

[0004] However, the titanium-based amorphous alloys currently developed have the following disadvantages: the titanium-based amorphous alloy materials contain the toxic element Be, which has environmental issues. In addition, the mechanical properties (such as hardness, tensile strength, density, etc.) of the current titanium-based amorphous alloys are poor. Summary of the invention

[0005] The present invention provides a titanium-based amorphous alloy, a structural part and a method for preparing the structural part, which can improve environmental protection, and can also improve the hardness and tensile strength of the titanium-based amorphous alloy and reduce the density.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the present invention provides a titanium-based amorphous alloy, the composition of the titanium-based amorphous alloy is shown in the following general formula: Ti a Cu b Zr c Hf d Ni e Si f Sn g; wherein a, b, c, d, e, f and g are all atomic percentages, and the sum of a, b, c, d, e, f and g is 100.

[0008] In an optional embodiment, a, b, c, d, e, f and g satisfy: 30<a<50, 20<b<40, 2<c<10, 1<d<10, 1<e<10, 0<f<3, 0<g<6.

[0009] In an optional embodiment, a, b, c, d, e, f and g satisfy: 35<a<45, 35<b<40, 2<c<5, 1<d<6, 5<e<10, 0.5<f<4, 3<g<6.

[0010] In an optional implementation, the value of a is 41.5, the value of b is 37.5, the value of c is 2.5, the value of d is 5, the value of e is 7.5, the value of f is 1, and the value of g is 5;

[0011] Or, the value of a is 40, the value of b is 38.5, the value of c is 3.5, the value of d is 5, the value of e is 7, the value of f is 2, and the value of g is 4;

[0012] Or, the value of a is 41, the value of b is 37, the value of c is 3, the value of d is 4, the value of e is 8, the value of f is 1.5, and the value of g is 5.5;

[0013] Or, the value of a is 44, the value of b is 35, the value of c is 4, the value of d is 3, the value of e is 7, the value of f is 3, and the value of g is 4.

[0014] An embodiment of the present invention further provides a structural component, which is made of the titanium-based amorphous alloy described in any of the above embodiments.

[0015] An embodiment of the present invention further provides a method for preparing a structural member, the method comprising the following steps:

[0016] According to Ti a Cu b Zr c Hf d Ni e Si f Sn g The mass percentage converted from the atomic percentage of , the required raw materials Ti, Cu, Zr, Hf, Ni, Si and Sn are weighed, and the raw materials are evenly mixed to obtain a mixed alloy, wherein a, b, c, d, e, f and g are all atomic percentages, and the sum of a, b, c, d, e, f and g is 100;

[0017] Adding the obtained mixed alloy into a smelting pool with a mold for smelting to obtain a master alloy ingot;

[0018] The master alloy ingot is prepared by suction casting to obtain a titanium-based amorphous alloy structural part.

[0019] In an optional embodiment, the smelting is performed by arc melting.

[0020] In an optional embodiment, the process further includes the following steps before the smelting:

[0021] The mixed alloy is placed in an electric arc furnace and the vacuum degree of the electric arc furnace is adjusted to 3×10 -3 Below Pa;

[0022] The electric arc furnace is filled with argon gas having a purity of 99.99%.

[0023] In an optional embodiment, the step of preparing the titanium-based amorphous alloy structural member by suction casting the master alloy ingot comprises the following steps:

[0024] After the smelting, suction casting is started, and after ensuring that the master alloy ingot is completely sucked into the molding cavity of the mold, suction casting is closed;

[0025] After cooling for 20 to 60 minutes, the argon protection is turned on, and the mold is disassembled after the pressure in the equipment returns to normal, to obtain the blank of the titanium-based amorphous alloy structural part;

[0026] The blank is finely processed to obtain a titanium-based amorphous alloy structural part.

[0027] In an optional embodiment, the smelting conditions simultaneously satisfy at least one of the following characteristics (1) to (3):

[0028] (1) The smelting is carried out under vacuum conditions;

[0029] (2) the smelting is carried out under the protection of an inert gas;

[0030] (3) The smelting is performed at least four times.

[0031] The beneficial effects of the titanium-based amorphous alloy, the structural component and the method for preparing the structural component according to the embodiments of the present invention include, for example:

[0032] The titanium-based amorphous alloy has a composition as shown in the following general formula: Ti a Cu b Zr c Hf d Ni e Si f Sn g; wherein a, b, c, d, e, f and g are all atomic percentages, and the sum of a, b, c, d, e, f and g is 100. The titanium-based amorphous alloy does not contain toxic substances such as Be, which can improve environmental protection. The titanium-based amorphous alloy prepared according to the above proportions and components has the characteristics of high hardness, high tensile strength and low density, and can meet the needs of precision structural parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A schematic diagram of a mold provided in an embodiment of the present invention from a first viewing angle;

[0035] Figure 2 A schematic diagram of a mold provided in an embodiment of the present invention from a second viewing angle;

[0036] Figure 3 A schematic diagram of the AA section of a mold provided in an embodiment of the present invention;

[0037] Figure 4 It is a schematic diagram of an ornament manufactured by using the method for preparing a structural member provided in an embodiment of the present invention.

[0038] Icon: 1000-mold; 100-center module; 110-big end; 120-small end; 130-boss; 200-upper mold plate; 210-smelting pool; 220-first accommodating cavity; 230-first screw hole; 300-middle mold plate; 310-second accommodating cavity; 400-gap; 500-first module; 600-second module; 700-product molding cavity; 800-lower mold plate; 810-third accommodating cavity; 820-airway. DETAILED DESCRIPTION

[0039] 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 and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0044] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0045] Most of the jewelry on the market, such as pendants and bracelets, are made of stainless steel, titanium alloy, aluminum alloy, precious metals and other materials. The density of products made of these materials is high, and the hardness is generally not high, so they need to be hardened. Usually, the process of this type of material is: the first process is the raw material blank molding, the second process is machining, the third process is rough polishing, and the fourth process is fine polishing. The processing technology is complicated, and the materials of these jewelry generally have low hardness and poor wear resistance. They are easily scratched and lose their luster after long-term wear.

[0046] Amorphous alloy is a new type of alloy prepared by rapid cooling. Its atomic arrangement is topologically disordered in three-dimensional space and connected by metal bonds. There are no ordered crystal planes, crystal directions, grain boundaries, dislocations and twins that are usually present in crystalline alloys, nor are there defects such as segregation and second phase component fluctuations. The constituent atoms maintain short-range order within several lattice constants, forming a structure similar to an atomic cluster. At the same time, there is no crystallization phenomenon during rapid solidification, so it has an atomic arrangement structure similar to that of a liquid. It is precisely because of the special atomic structure of amorphous alloys that it determines its special physical and chemical properties. Compared with traditional crystalline materials, amorphous alloys have high strength, high hardness, low elastic modulus, high wear resistance and high corrosion resistance. Therefore, amorphous alloys can be applied to jewelry to improve the performance of jewelry. However, the titanium-based amorphous alloys currently developed have the following disadvantages: the titanium-based amorphous alloy materials are added with toxic elements Be, which has environmental protection problems. And the mechanical properties (such as hardness, tensile strength, density, etc.) of the current titanium-based amorphous alloys are not good.

[0047] Based on this, the titanium-based amorphous alloy provided in the embodiments of the present invention can effectively improve the above-mentioned technical problems. The titanium-based amorphous alloy can improve environmental protection, and can also improve the hardness and tensile strength of the titanium-based amorphous alloy, and reduce density. The titanium-based amorphous alloy can be used to make various accessories or other structural parts. The structural parts having the titanium-based amorphous alloy have the same functions as above, which are not limited here.

[0048] The composition of the titanium-based amorphous alloy in this embodiment is shown in the following general formula: Ti a Cu b Zr c Hf d Ni e Si f Sn g ; Wherein, a, b, c, d, e, f and g are all atomic percentages, and the sum of a, b, c, d, e, f and g is 100. The titanium-based amorphous alloy obtained in this way does not contain toxic substances such as Be in its composition, which can improve environmental protection. The titanium-based amorphous alloy obtained according to the above proportions and components has the characteristics of high hardness, high tensile strength and low density, which can meet the needs of precision structural parts. Wherein, a, b, c, d, e, f and g meet: 30<a<50, 20<b<40, 2<c<10, 1<d<10, 1<e<10, 0<f<3, 0<g<6.

[0049] Wherein, the value of a can be any value between 30 and 50, such as 30.5, 31, 32, 32.5, 33, 33.5, 34, 34.5, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 47.5, 48, 48.5, 49, 49.5, etc., and is not limited here. The value of b can be any value between 20 and 40, such as 20.5, 21, 21.5, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 35.5, 36, 36.5, 37, 37.5, 38, 38.5, 39, 39.5, etc., and is not limited here. The value of c can be 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, etc., any value between 2 and 10, and is not limited here. The value of d can be 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, etc., any value between 1 and 10, and is not limited here. The value of e can be 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, etc., any value between 1 and 10, and is not limited here. The value of f can be 0.5, 1, 1.5, 2, 2.5, etc., and any value between 0 and 3, and is not limited here. The value of g can be 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, etc., and any value between 0 and 6, and is not limited here.

[0050] Furthermore, a, b, c, d, e, f and g satisfy: 35<a<45, 35<b<40, 2<c<5, 1<d<6, 5<e<10, 0.5<f<4, 3<g<6.

[0051] Preferably, the value of a is 41.5, the value of b is 37.5, the value of c is 2.5, the value of d is 5, the value of e is 7.5, the value of f is 1, and the value of g is 5; that is, the composition expression of the titanium-based amorphous alloy at this time is: Ti 41.5 Cu 37.5 Zr 2.5 Hf5 7.5 Si1Sn5.

[0052] Preferably, the value of a is 40, the value of b is 38.5, the value of c is 3.5, the value of d is 5, the value of e is 7, the value of f is 2, and the value of g is 4; that is, the composition expression of the titanium-based amorphous alloy at this time is: Ti 40 Cu 38.5 Zr 3.5Hf5Ni7Si2Sn4.

[0053] Preferably, the value of a is 41, the value of b is 37, the value of c is 3, the value of d is 4, the value of e is 8, the value of f is 1.5, and the value of g is 5.5; that is, the composition expression of the titanium-based amorphous alloy at this time is: Ti 41 Cu 37 Zr3Hf4Ni8Si 1.5 Sn 5.5 .

[0054] Preferably, the value of a is 44, the value of b is 35, the value of c is 4, the value of d is 3, the value of e is 7, the value of f is 3, and the value of g is 4; that is, the composition expression of the titanium-based amorphous alloy at this time is: Ti 44 Cu 35 Zr4Hf3Ni7Si3Sn4.

[0055] An embodiment of the present invention further provides a structural component, which is made of the above-mentioned titanium-based amorphous alloy.

[0056] Figure 4 Schematic diagram of a structural member manufactured by a method for manufacturing a structural member provided in an embodiment of the present invention, such as Figure 4 As shown, the ornament is made by the following preparation method. Specifically, an embodiment of the present invention also provides a method for preparing a structural part, and the preparation method includes the following steps:

[0057] According to Ti a Cu b Zr c Hf d Ni e Si f Sn g The mass percentage converted from the atomic percentage of , the required raw materials Ti, Cu, Zr, Hf, Ni, Si and Sn are weighed, and the raw materials are evenly mixed to obtain a mixed alloy, wherein a, b, c, d, e, f and g are all atomic percentages, and the sum of a, b, c, d, e, f and g is 100;

[0058] The obtained mixed alloy is added into a smelting pool 210 having a mold 1000 for smelting to obtain a master alloy ingot;

[0059] The smelting conditions simultaneously meet at least one of the following characteristics (1) to (3):

[0060] (1) Melting is carried out under vacuum conditions;

[0061] (2) The smelting is carried out under the protection of inert gas;

[0062] (3) The smelting is performed at least four times.

[0063] The number of smelting in this embodiment is not less than 4 times, and can be smelted 4 times, 5 times, 6 times, 7 times or more times, which is not limited here. The uniformity of the chemical composition of the master alloy ingot can be ensured by multiple smelting, thereby ensuring the performance of the product. Of course, the number of smelting can also be 1 time, 2 times, 3 times, etc., but in order to ensure the uniformity of the chemical composition of the master alloy ingot and to smelt thoroughly, multiple smelting is required. Preferably, the number of smelting is 4 times.

[0064] The smelting time is generally greater than or equal to 20 minutes. The longer the smelting time, the better the purity and quality of the alloy obtained. If the smelting time is too short, some impurities may still exist in the alloy, affecting its quality and purity. However, if the smelting time is too long, the quality of the alloy will also decrease. At extremely high temperatures, the alloy may undergo chemical reactions, resulting in a decrease in quality. Preferably, the smelting time is 30 to 45 minutes. More preferably, the smelting time is 30 minutes.

[0065] The master alloy ingot is prepared by suction casting to obtain a titanium-based amorphous alloy structural part.

[0066] Specifically, preparing a titanium-based amorphous alloy structural part by suction casting from a master alloy ingot comprises the following steps:

[0067] After smelting, suction casting is turned on to ensure that the master alloy ingot is completely sucked into the molding cavity of the mold 1000 and then the suction casting is turned off;

[0068] With the help of arc melting furnace suction casting equipment, structural parts such as titanium-based amorphous alloy jewelry can be quickly produced on the equipment, and through the arc suction casting processing method, a high-gloss surface can be formed on the surface of the structural parts to reduce the subsequent polishing of the product, simplify the processing process, save processing time, and improve processing efficiency.

[0069] After cooling for 20 to 60 minutes, the argon protection is turned on, and the mold 1000 is disassembled after the pressure in the equipment is normal, to obtain a blank of a titanium-based amorphous alloy structural part;

[0070] Preferably, the cooling time is 30 minutes.

[0071] The blank is finely processed to obtain a titanium-based amorphous alloy structural part.

[0072] The finishing here refers to grinding the parting line of the rough mold and polishing the surface.

[0073] In order to improve the surface brightness and reduce the subsequent polishing of the product, the melting in this embodiment adopts arc melting.

[0074] The following steps are also included before smelting:

[0075] Place the mixed alloy into an electric arc furnace and adjust the vacuum degree of the electric arc furnace to 3 x 10 -3 Below Pa;

[0076] Turn off the arc furnace, make sure the equipment and seal are normal, first use a mechanical pump to pump the vacuum in the arc furnace to below 20Pa, and then use a molecular pump to continue to pump the vacuum in the furnace to 3×10 -3 Below Pa.

[0077] The electric arc furnace is filled with argon gas with a purity of 99.99%.

[0078] Argon is used to provide inert gas protection for the subsequent arc melting of the master alloy ingot. Of course, as long as high-purity argon is injected into the arc furnace, the concentration of argon can be greater than 99%, and the specific purity of argon used is not limited here. In addition, in addition to filling argon, argon can also be replaced by inert gases such as helium and krypton, which are not limited here.

[0079] The titanium-based amorphous alloy prepared by the above processing method, that is, the titanium-based amorphous alloy prepared by arc suction casting, can form a high-gloss surface, reduce the subsequent polishing of the product, and can quickly realize the production of titanium-based amorphous alloy jewelry, saving labor time. Therefore, titanium-based amorphous alloy can be used as a new option for wear-resistant and high-gloss jewelry materials.

[0080] Example 1

[0081] Ti 40 Cu 38.5 Zr 3.5 Production of Hf5Ni7Si2Sn4 titanium-based amorphous alloy jewelry:

[0082] 1) preparing alloy raw materials according to the above mass percentage, and then adding the alloy raw materials into the smelting pool 210 in which the mold 1000 has been assembled;

[0083] 2) Close the chamber and ensure that the equipment and seal are normal; first use a mechanical pump to pump the vacuum in the furnace to below 20Pa, and then use a molecular pump to continue to pump the vacuum to 3×10 -3 Pa, and then close all valves and fill with high-purity argon (purity 99.99%) to provide inert atmosphere protection for the subsequent arc melting of the master alloy ingot;

[0084] 3) Melt the alloy raw materials in the smelting pool 210, and electromagnetic stirring can be used during the smelting process. Note that each smelting time should not be too long to prevent the volatilization of some components in the alloy. The smelting time in this embodiment is 30 minutes. In order to ensure the uniformity of the chemical composition of the master alloy ingot, each alloy ingot is turned over and re-smelted with a turning spoon after smelting, and each alloy ingot is smelted no less than four times. The more uniform the alloy smelting is, the more conducive it is to the subsequent preparation of amorphous alloy samples. Specifically, the number of smelting times in this embodiment is 4 times;

[0085] 4) Turn on the suction casting function of the equipment to ensure that the titanium-based amorphous alloy raw material melt is completely sucked into the molding cavity of the mold 1000, and then turn off the suction casting function. After cooling for 30 minutes, turn on the argon protection, and after the pressure in the arc furnace returns to normal, open the arc furnace door and disassemble the mold 1000 device;

[0086] 5) Take out the product in the core mold 1000, grind the parting line of the product, polish the surface, and complete the product processing.

[0087] Example 2

[0088] Ti 41.5 Cu 37.5 Zr 2.5 Hf5 7.5 Production of Si1Sn5 titanium-based amorphous alloy jewelry:

[0089] 1) preparing alloy raw materials according to the above mass percentage, and then adding the alloy raw materials into the smelting pool 210 in which the mold 1000 has been assembled;

[0090] 2) Close the chamber, ensure that the equipment and seal are normal, first use a mechanical pump to pump the vacuum in the furnace to below 20Pa, and then use a molecular pump to continue to pump the vacuum to 3.0×10 -3 Pa, and then close all valves and fill with high-purity argon (purity 99.99%) to provide inert atmosphere protection for the subsequent arc melting of the master alloy ingot;

[0091] 3) Melting the alloy raw materials in the smelting pool 210. Electromagnetic stirring can be used during the smelting process. The smelting time is 30 minutes. After smelting, each alloy ingot is turned over by a turning spoon and re-smelted. Each alloy ingot is smelted no less than four times. Specifically, the number of smelting times in this embodiment is 4 times;

[0092] 4) Turn on the suction casting function of the equipment to ensure that the titanium-based amorphous alloy raw material melt is completely sucked into the molding cavity of the mold 1000, and then turn off the suction casting function. After cooling for 30 minutes, turn on the argon protection, and after the pressure of the arc furnace returns to normal, open the arc furnace chamber door and disassemble the mold 1000 device;

[0093] 5) Take out the product in the core mold 1000, grind the parting line of the product, polish the surface, and complete the product processing.

[0094] Example 3

[0095] Ti 41 Cu 37 Zr3Hf4Ni8Si 1.5 Sn 5.5 Production of titanium-based amorphous alloy jewelry:

[0096] 1) preparing alloy raw materials according to the above mass percentage, and then adding the alloy raw materials into the smelting pool 210 in which the mold 1000 has been assembled;

[0097] 2) Close the chamber, ensure that the equipment and seal are normal, first use a mechanical pump to pump the vacuum in the furnace to below 20Pa, and then use a molecular pump to continue to pump the vacuum to 3.0×10 -3 Pa, and then close all valves and fill with high-purity argon (purity 99.99%) to provide inert atmosphere protection for the subsequent arc melting of the master alloy ingot;

[0098] 3) Melting the alloy raw materials in the smelting pool 210. Electromagnetic stirring can be used during the smelting process. The smelting time is 30 minutes. After smelting, each alloy ingot is turned over by a turning spoon and re-smelted. Each alloy ingot is smelted no less than four times. Specifically, the number of smelting times in this embodiment is 4 times;

[0099] 4) Turn on the suction casting function of the equipment to ensure that the titanium-based amorphous alloy raw material melt is completely sucked into the molding cavity of the mold 1000, and then turn off the suction casting function. After cooling for 30 minutes, turn on the argon protection, and after the pressure in the arc furnace returns to normal, open the chamber door of the arc furnace and disassemble the mold 1000 device;

[0100] 5) Take out the product in the core mold 1000, grind the parting line of the product, polish the surface, and complete the product processing.

[0101] Example 4

[0102] Ti 44 Cu 35 Production of Zr4Hf3Ni7Si3Sn4 titanium-based amorphous alloy jewelry:

[0103] 1) preparing alloy raw materials according to the above mass percentage, and then adding the alloy raw materials into the smelting pool 210 in which the mold 1000 has been assembled;

[0104] 2) Close the chamber, ensure that the equipment and seal are normal, first use a mechanical pump to pump the vacuum in the furnace to below 20Pa, and then use a molecular pump to continue to pump the vacuum to 3.0×10 -3Pa, and then close all valves and fill with high-purity argon (purity 99.99%) to provide inert atmosphere protection for the subsequent arc melting of the master alloy ingot;

[0105] 3) Melting the alloy raw materials in the smelting pool 210. Electromagnetic stirring can be used during the smelting process. The smelting time is 30 minutes. After smelting, each alloy ingot is turned over by a turning spoon and re-smelted. Each alloy ingot is smelted no less than four times. Specifically, the number of smelting times in this embodiment is 4 times;

[0106] 4) Turn on the suction casting function of the equipment to ensure that the titanium-based amorphous alloy raw material melt is completely sucked into the molding cavity of the mold 1000, and then turn off the suction casting function. After cooling for 30 minutes, turn on the argon protection, and after the pressure in the arc furnace returns to normal, open the chamber door of the arc furnace and disassemble the mold 1000 device;

[0107] 5) Take out the product in the core mold 1000, grind the parting line of the product, polish the surface, and complete the product processing.

[0108] Comparative Example 1

[0109] This comparative example provides a titanium-based amorphous alloy, the composition of which is shown in the following general formula: Ti 68.8 Zr 11.6 Cu 5.1 Co6Al 6.5 Ta2. The hardness and tensile strength of this titanium-based amorphous alloy are both relatively low.

[0110] Comparative Example 2

[0111] This comparative example provides a titanium-based amorphous alloy, the composition of which is shown in the following general formula: Ti 50 Cu 25 Ni 22 Al3. The tensile strength of this titanium-based amorphous alloy is relatively low.

[0112] Comparative Example 3

[0113] This comparative example provides a titanium-based amorphous alloy, the composition of which is shown in the following general formula: Ti 66 Zr8Cu 15 Ni 10 Al 0.5 Si 0.5 The tensile strength of the titanium-based amorphous alloy is relatively low.

[0114] Stainless steel SUS316 alloy has good corrosion resistance, especially chloride corrosion resistance, but the production cost is high. Stainless steel SUS316 alloy has low strength, high processing difficulty, high weight, and relatively poor wear resistance. Stainless steel SUS316 alloy should not be used in working environments that need to withstand high friction.

[0115] The raw materials and production process of titanium alloy TC4 are relatively complex, resulting in its cost being much higher than common steel materials and aluminum alloys. In particular, the smelting, processing and surface treatment of titanium alloys require special technology and equipment, which makes the application cost of TC4 alloy relatively high. Moreover, titanium alloy TC4 may exhibit brittleness under certain conditions, especially at high temperatures or after certain improper processing and welding, which may cause stress corrosion cracking, especially in a chlorine-containing environment. In addition, the wear resistance of titanium alloy TC4 is poor. The surface treatment technology of titanium alloys is also demanding, especially in terms of corrosion protection and aesthetics, requiring anodizing, spraying and other treatments, which increases the difficulty of production and maintenance.

[0116] Titanium-based amorphous alloys have great advantages over stainless steel and titanium alloys. Titanium-based amorphous alloys have high hardness, high tensile strength and moderate density. Alloys with high hardness can withstand stronger friction and therefore have better wear resistance. Alloys with high tensile strength can withstand greater tensile forces without breaking or deforming, and therefore have higher structural stability and reliability. Alloys with high hardness and tensile strength can effectively prevent deformation, breakage or fracture during long-term use, thereby improving the safety and durability of the product. Alloys with high hardness and tensile strength are also corrosion-resistant. In addition, moderate density can reduce weight without sacrificing strength and rigidity. Moreover, alloys with medium density are generally easier to process than high-density alloys. Alloys with moderate density have good corrosion resistance and fatigue resistance.

[0117] In addition, the surface of products formed by titanium-based amorphous alloys also has a very mirror-like luster. Compared with other materials, titanium-based amorphous alloys are very suitable raw materials for jewelry.

[0118] The titanium amorphous alloys prepared in Examples 1-4 were subjected to room temperature hardness tests, tensile strength tests, and density tests. The following is a performance comparison of the titanium-based amorphous alloys of Examples 1-4 and other components and commonly used alloys on the market, see Table 1: Performance test comparison table.

[0119]

[0120] Table 1. Performance test comparison table

[0121] The structure of the mold 1000 mentioned in the preparation method is described in detail below.

[0122] Figure 1 It is a schematic diagram of a mold 1000 provided in an embodiment of the present invention from a first viewing angle; Figure 2 A schematic diagram of a mold 1000 provided in an embodiment of the present invention from a second viewing angle; Figure 3 Schematic diagram of the cross section of mold 1000-A provided in an embodiment of the present invention.

[0123] like Figure 1 , Figure 2 and Figure 3 As shown, the mold 1000 in this embodiment includes a central module 100, an upper mold plate 200, a middle mold plate 300, a first module 500 and a second module 600. The upper mold plate 200 is provided with a smelting pool 210; the smelting pool 210 is used to place raw materials. The upper mold plate 200 is provided with a first accommodating cavity 220, and the first accommodating cavity 220 is connected to the smelting pool 210; the middle mold plate 300 is connected to the upper mold plate 200 and is stacked. The middle mold plate 300 is provided with a second accommodating cavity 310, and the second accommodating cavity 310 is connected to the first accommodating cavity 220. The first accommodating chamber 220 and the second accommodating chamber 310 are used to place the central module 100; there is a gap 400 between the central module 100 and the inner wall of the first accommodating chamber 220; the first module 500 and the second module 600 are arranged around the central module 100 and are located in the second accommodating chamber 310; the first module 500, the second module 600 and the central module 100 are enclosed together to form a product forming chamber 700. That is, the raw material is placed in the smelting pool 210, flows from the gap 400 through the first accommodating chamber 220, and flows into the product forming chamber 700 to form a product blank. By setting up the central module 100 and providing a gap 400 between the central module 100 and the inner wall of the first accommodating cavity 220, the raw material flows from the smelting pool 210 through the gap 400 into the product molding cavity 700, which can slow down the flow rate and flow velocity of the raw material entering the product molding cavity 700, thereby achieving the purpose of buffering, thereby effectively alleviating the erosion of the raw material on the product molding cavity 700 of the mold 1000, thereby increasing the service life of the mold 1000.

[0124] In order to improve the cushioning effect of the raw materials on the product molding cavity 700, please refer to Figure 3, the shape of the central module 100 in this embodiment is a truncated cone, and the central template includes a large end 110 and a small end 120, and the small end 120 is close to the smelting pool 210. That is, the central module 100 has an inclined surface, and the axis of the gap 400 formed by the central module 100 and the first accommodating cavity 220 is also inclined, and the straight-line distance from the axis of the gap 400 to the central axis of the mold 1000 gradually increases along the direction from the upper mold plate 200 to the middle mold plate 300. The above design can further slow down the flow rate of the raw materials, alleviate the erosion of the raw materials on the product molding cavity 700 of the mold 1000, and further improve the service life of the mold 1000. Of course, the central module 100 can also be designed as a cone or other shape with the above-mentioned inclined surface, which is not limited here.

[0125] Please continue reading Figure 3 In this embodiment, a boss 130 is further provided on one side of the large end 110 of the central module 100, and the diameter of the boss 130 is larger than the diameter of the large end 110. In this embodiment, the boss 130 is located in the second accommodating cavity 310, and the surface formed by the connection between the boss 130 and the central module 100 and the inner wall of the first module 500 and the second module 600 together enclose the product molding cavity 700. That is, the central module 100 and the boss 130 are completely located in the upper mold plate 200 and the middle mold plate 300.

[0126] The above-mentioned "middle mold plate 300 is connected to upper mold plate 200", for details, please refer to Figure 3 , the upper mold plate 200 and the middle mold plate 300 in this embodiment are connected by threads. The upper mold plate 200 in this embodiment is provided with a first screw hole 230, and the middle mold plate 300 is provided with a second screw hole, and the first screw hole 230 and the second screw hole are arranged correspondingly; the first screw hole 230 and the second screw hole are used to install threaded fasteners to connect the upper mold plate 200 and the middle mold plate 300. The threaded fasteners here can be bolts, screws, etc., which are not limited here. In order to ensure the stability of the connection between the upper mold plate 200 and the middle mold plate 300, the number of the first screw hole 230 and the second screw hole in this embodiment are both multiple, and the multiple first screw holes 230 and the multiple second screw holes are arranged one by one, and the multiple first screw holes 230 are arranged at intervals. Specifically, the number of the first screw hole 230 and the second screw hole in this embodiment is both two, and the two first screw holes 230 are respectively located on both sides of the upper mold plate 200, and correspondingly, the two second screw holes are respectively located on both sides of the middle mold plate 300. The number of the first screw hole 230 and the second screw hole can also be three, four, five, etc., which is not limited here. Of course, the upper mold plate 200 and the middle mold plate 300 can also be connected by welding, clamping, etc., which is determined according to actual processing conditions and is not limited here.

[0127] See also Figure 3, the mold 1000 in this embodiment also includes a lower mold plate 800, which is connected to the middle mold plate 300 and is stacked. In order to reduce the defects of pores, cracks and the like in the product during the molding process of the mold 1000, the lower mold plate 800 in this embodiment is provided with an air channel 820, which is used to connect the second accommodating cavity 310 and the outside. During the molding process of the mold 1000, gas (such as air or water vapor) will be generated. If the gas in the mold 1000 cannot be effectively discharged, bubbles may be formed on the surface of the molded product, or pores may be generated in the molded product, affecting the production quality of the molded product. By setting the air channel 820, the gas generated in the mold 1000 can be discharged from the mold 1000 in time to prevent the product in the mold 1000 from forming defects such as pores, bubbles, cracks and the like. In addition, when the molten metal is mixed with the gas, inclusions may be generated, and these inclusions may adhere to the surface or inside of the casting. By providing the gas channel 820, the gas can be effectively discharged to avoid mixing of the gas with the molten metal to produce inclusions, thereby improving the overall quality of the molded product. When the gas cannot be discharged in time during the casting process, the gas expansion may cause deformation of the casting, especially in complex shapes or thin-walled castings. By providing the gas channel 820, the risk of deformation of the molded product can be reduced to ensure product accuracy.

[0128] In addition, in the suction casting process, the air channel 820 can be used to connect with a vacuum pump to ensure that the vacuum degree in the mold 1000 meets the processing requirements.

[0129] See also Figure 3 In order to expand the space of the product molding cavity 700, the lower mold plate 800 in this embodiment is provided with a third accommodating cavity 810, the boss 130 is located in the third accommodating cavity 810, and the surface formed by the connection between the boss 130 and the central module 100 is flush with the surface of the middle mold plate 300 away from the upper mold plate 200.

[0130] The above-mentioned "lower mold plate 800 is connected to the middle mold plate 300", specifically, the lower mold plate 800 and the middle mold plate 300 in this embodiment are connected by threads. In detail, the lower mold plate 800 is provided with a third screw hole, the third screw hole is arranged corresponding to the second screw hole, and the second screw hole and the third screw hole are used to install threaded fasteners to connect the middle mold plate 300 and the lower mold plate 800. The threaded fasteners here can be bolts, screws, etc., which are not limited here. In order to ensure the stability of the connection between the middle mold plate 300 and the lower mold plate 800, the number of the second screw hole and the third screw hole in this embodiment are both multiple, and the multiple second screw holes and the multiple third screw holes are arranged one by one, and the multiple second screw holes are arranged at intervals. Specifically, the number of the second screw hole and the third screw hole in this embodiment is two, and the two second screw holes are respectively located on both sides of the middle mold plate 300, and correspondingly, the two third screw holes are respectively located on both sides of the lower mold plate 800. The number of the second screw hole and the third screw hole can also be three, four, five, etc., which are not limited here. Of course, the middle mold plate 300 and the lower mold plate 800 can also be connected by welding, clamping or other connection methods, which are determined according to actual processing conditions and are not limited here. In addition, the positions of the plurality of first screw holes 230, the plurality of second screw holes and the plurality of third screw holes can be set in a one-to-one correspondence.

[0131] According to processing requirements, the lower mold plate 800 in this embodiment is made of magnesium alloy or aluminum alloy. The upper mold plate 200 is made of copper alloy, and / or the middle mold plate 300 is made of mold 1000 steel. Of course, according to actual processing requirements, the upper mold plate 200, the middle mold plate 300 and the lower mold plate 800 can also be made of one or more materials such as plastic, titanium alloy, alloy steel, aluminum alloy, hardened tool steel, etc., which are not limited here.

[0132] The mold 1000 provided in this embodiment includes a central module 100, an upper mold plate 200, a middle mold plate 300, a first module 500 and a second module 600. The upper mold plate 200 is provided with a smelting pool 210; the smelting pool 210 is used for placing raw materials. The upper mold plate 200 is provided with a first accommodating cavity 220, which is connected to the smelting pool 210; the middle mold plate 300 is connected to the upper mold plate 200 and is stacked; the middle mold plate 300 is provided with a second accommodating cavity 310, which is connected to the first accommodating cavity 220; the first accommodating cavity 220 and the second accommodating cavity 310 are used together to place the central module 100; there is a gap 400 between the central module 100 and the inner wall of the first accommodating cavity 220; the first module 500 and the second module 600 are arranged at intervals around the central module 100 and are located in the second accommodating cavity 310; the first module 500, the second module 600 and the central module 100 together enclose a product molding cavity 700. By setting up the central module 100 and providing a gap 400 between the central module 100 and the inner wall of the first accommodating cavity 220, the raw material flows from the smelting pool 210 through the gap 400 into the product molding cavity 700, which can slow down the flow rate and flow velocity of the raw material entering the product molding cavity 700, thereby achieving the purpose of buffering, thereby effectively alleviating the erosion of the raw material on the product molding cavity 700 of the mold 1000, thereby increasing the service life of the mold 1000.

[0133] In summary, the titanium-based amorphous alloy has a composition as shown in the following general formula: Ti a Cu b Zr c Hf d Ni e Si f Sn g ; Wherein, a, b, c, d, e, f and g are all atomic percentages, and the sum of a, b, c, d, e, f and g is 100. The titanium-based amorphous alloy does not contain toxic substances such as Be in its composition, which can improve environmental protection. The titanium-based amorphous alloy prepared according to the above proportions and components has the characteristics of high hardness, high tensile strength and low density, which can meet the needs of precision structural parts. And the preparation method of arc melting and suction casting is used to process titanium-based amorphous alloy structural parts, which can quickly realize the production of titanium-based amorphous alloy jewelry, and can form a high-gloss surface on the structural parts, reduce the subsequent polishing of the product, simplify the processing process, save processing time, and improve processing efficiency.

[0134] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A titanium-based amorphous alloy, characterized in that: The composition of the titanium-based amorphous alloy is shown in the following general formula: Ti a Cu b Zr c Hf d Ni e Si f Sn g ; wherein a, b, c, d, e, f and g are all atomic percentages, and the sum of a, b, c, d, e, f and g is 100.

2. The titanium-based amorphous alloy according to claim 1, characterized in that: a, b, c, d, e, f and g satisfy: 30<a<50, 20<b<40, 2<c<10, 1<d<10, 1<e<10, 0<f<4, 0<g<6.

3. The titanium-based amorphous alloy according to claim 2, characterized in that: a, b, c, d, e, f and g satisfy: 35<a<45, 35<b<40, 2<c<5, 1<d<6, 5<e<10, 0.5<f<4, 3<g<6.

4. The titanium-based amorphous alloy according to claim 2, characterized in that: The value of a is 41.5, the value of b is 37.5, the value of c is 2.5, the value of d is 5, the value of e is 7.5, the value of f is 1, and the value of g is 5; Or, the value of a is 40, the value of b is 38.5, the value of c is 3.5, the value of d is 5, the value of e is 7, the value of f is 2, and the value of g is 4; Or, the value of a is 41, the value of b is 37, the value of c is 3, the value of d is 4, the value of e is 8, the value of f is 1.5, and the value of g is 5.5; Or, the value of a is 44, the value of b is 35, the value of c is 4, the value of d is 3, the value of e is 7, the value of f is 3, and the value of g is 4.

5. A structural member, characterized in that: The titanium-based amorphous alloy is prepared from any one of claims 1 to 4.

6. A method for preparing a structural part, characterized in that: The preparation method comprises the following steps: According to Ti a Cu b Zr c Hf d Ni e Si f Sn g The mass percentage converted from the atomic percentage of , the required raw materials Ti, Cu, Zr, Hf, Ni, Si and Sn are weighed, and the raw materials are evenly mixed to obtain a mixed alloy, wherein a, b, c, d, e, f and g are all atomic percentages, and the sum of a, b, c, d, e, f and g is 100; Adding the obtained mixed alloy into a smelting pool (210) having a mold (1000) for smelting to obtain a master alloy ingot; The master alloy ingot is prepared by suction casting to obtain a titanium-based amorphous alloy structural part.

7. The method for preparing a structural member according to claim 6, characterized in that: The smelting is performed by arc melting.

8. The method for preparing a structural member according to claim 7, characterized in that: Before carrying out the smelting, the following steps are also included: The mixed alloy is placed in an electric arc furnace and the vacuum degree of the electric arc furnace is adjusted to 3×10 -3 Below Pa; The electric arc furnace is filled with argon gas having a purity of 99.99%.

9. The method for preparing a structural member according to claim 6, characterized in that: The step of preparing the titanium-based amorphous alloy structural member by the suction casting method comprises the following steps: After the smelting, suction casting is started, and after ensuring that the master alloy ingot is completely sucked into the molding cavity of the mold (1000), suction casting is closed; After cooling for 20 to 60 minutes, the argon protection is turned on, and after the pressure in the equipment returns to normal, the mold (1000) is disassembled to obtain the blank of the titanium-based amorphous alloy structural part; The blank is finely processed to obtain a titanium-based amorphous alloy structural part.

10. The method for preparing a structural member according to claim 6, characterized in that: The smelting conditions simultaneously satisfy at least one of the following characteristics (1) to (3): (1) The smelting is carried out under vacuum conditions; (2) the smelting is carried out under the protection of an inert gas; (3) The smelting is performed at least four times.

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