A platinum-based multi-component alloy wire for x-ray imaging and a method for manufacturing the same

Abstract

The present application relates to the field of medical intervention X-ray imaging technology, and provides a platinum-based multi-element alloy wire for X-ray imaging and a preparation method thereof.The platinum-based multi-element alloy wire for X-ray imaging comprises, by mass percentage, Pt: 88-90%, Ir: 0-8%, W: 1-7%, and Ni: 1-3%.The preparation method of the platinum-based multi-element alloy wire for X-ray imaging comprises the following steps: refining Pt, Ir, W and Ni or Pt, W and Ni after mixing to obtain an intermediate alloy;melting and casting the intermediate alloy to obtain a platinum-based multi-element alloy ingot;homogenizing heat treating the ingot and then rolling to obtain a φ6-10 mm rod;drawing the rod to obtain a φ0.1-1 mm wire;heat treating the wire and then drawing to obtain a φ0.01-0.1 mm wire;annealing the wire to obtain a finished platinum-based multi-element alloy wire.The present application can improve the strength, elasticity, oxidation resistance and imaging clarity of the platinum-based multi-element alloy wire when used for X-ray imaging.

Description

Technical Field

[0001] This invention relates to the field of X-ray imaging technology for medical intervention, and in particular to a high-strength, superelastic platinum-based multi-element alloy wire for X-ray imaging and its preparation method. Background Technology

[0002] Medical interventional X-ray imaging materials, such as imaging springs and braided filaments, are essential key materials for all interventional medical devices. Currently, the mainstream products are PtW8 and PtNi10 filaments. PtW8 filaments have good stability, but poor elasticity and ductility, resulting in poor material flexibility during use. PtNi10 filaments, on the other hand, have relatively better flexibility, but their overall imaging effect is not as good, and they are prone to oxidation. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a platinum-based multi-element alloy wire for X-ray development and its preparation method, which can improve the strength, elasticity, oxidation resistance, and development clarity of the platinum-based multi-element alloy wire when used for X-ray development.

[0004] The technical solution of this invention is as follows:

[0005] A platinum-based multi-element alloy wire for X-ray imaging, comprising, by weight percentage:

[0006] Pt: 88-90%, Ir: 0-8%, W: 1-7%, Ni: 1-3%.

[0007] A method for preparing the platinum-based multi-element alloy wire for X-ray imaging includes the following steps:

[0008] Step 1: Refining

[0009] The metals Pt, Ir, W, and Ni, or Pt, W, and Ni, are mixed in the above mass percentages and then refined to obtain Pt-Ir-Ni master alloys and Pt-W-Ni master alloys or Pt-Ni master alloys and Pt-W master alloys.

[0010] Step 2: Melting and Casting

[0011] The intermediate alloy is melted and cast to obtain a platinum-based multi-element alloy ingot;

[0012] Step 3: Homogenization

[0013] The platinum-based multi-element alloy ingot is subjected to homogenization heat treatment;

[0014] Step 4: Rolling

[0015] The platinum-based multi-element alloy ingots after homogenization heat treatment are rolled to obtain platinum-based multi-element alloy bars with a diameter of φ6-10mm.

[0016] Step 5: One pull

[0017] The platinum-based multi-element alloy rod is drawn to obtain a platinum-based multi-element alloy wire with a diameter of φ0.1-1mm;

[0018] Step 6: Heat treatment

[0019] The platinum-based multi-element alloy wire obtained in step 5 is subjected to heat treatment;

[0020] Step 7: Secondary pulling

[0021] The platinum-based multi-element alloy wire after heat treatment in step 6 is drawn to obtain a platinum-based multi-element alloy wire with a diameter of φ0.01-0.1mm.

[0022] Step 8: Annealing

[0023] The platinum-based multi-element alloy wire obtained in step 7 is annealed to obtain the finished platinum-based multi-element alloy wire.

[0024] Optionally, in step 1, a vacuum non-consumable arc furnace is used for refining, and the vacuum level is 10 before refining. -4 Pa~10 -3 Pa, argon gas is introduced until the vacuum degree is (7-8)×10. -1 For the preparation of Pt-Ir-Ni master alloy, the refining current is 140-250A and the refining time is 5-10min; for the preparation of Pt-W-Ni master alloy, the refining current is 160-270A and the refining time is 5-10min; for the preparation of Pt-Ni master alloy, the refining current is 140-220A and the refining time is 5-10min; and for the preparation of Pt-W master alloy, the refining current is 170-280A and the refining time is 5-10min.

[0025] Optionally, in step 2, a vacuum induction melting furnace is used for melting, and a water-cooled copper mold is used for casting.

[0026] Optionally, in step 3, the homogenization heat treatment is performed at a temperature of 1000-1300℃ for 180-240 minutes, using a vacuum heat treatment method.

[0027] Optionally, in step 4, when the deformation amount of each rolling pass is 10-15% and the total deformation amount is 60-70%, annealing is performed at a temperature of 800-1000℃ and an annealing time of 160-360min.

[0028] Optionally, in step 5, when the deformation of the drawing pass is 5%-10% and the total deformation is 60%-70%, annealing is performed at a temperature of 800-1000℃, an annealing time of 160-360 min, and a vacuum heat treatment method.

[0029] Optionally, in step 6, the heat treatment involves holding the platinum-based multi-element alloy wire obtained in step 5 at 720-750℃ for 2-6 hours, and the heat treatment method is vacuum heat treatment.

[0030] Optionally, in step 7, the deformation amount of each drawing pass is 5%-10%.

[0031] Optionally, in step 8, the annealing temperature is 410-430℃, the annealing time is 10-20s, and the annealing method is continuous annealing under argon protection.

[0032] The beneficial effects of this invention are as follows:

[0033] (1) The platinum-based multi-element alloy wire of the present invention achieves alloy ratio control by setting 88-90% Pt, 0-8% Ir, 1-7% W, and 1-3% Ni to obtain a high-performance X-ray imaging wire. Compared with traditional binary alloys such as platinum-tungsten alloy, platinum-nickel alloy, and platinum-iridium alloy, the addition of a small amount of Ni to platinum-tungsten alloy and platinum-iridium alloy improves the elasticity of the material. The addition of W and Ni to platinum-iridium alloy improves the oxidation resistance and strength of the material. Therefore, compared with traditional imaging wires (such as PtNi10 wire and PtW8 wire), it has the advantages of clear X-ray imaging effect, high strength (greater than 1600 MPa), super elasticity (elongation > 10%), high oxidation resistance and excellent biocompatibility, which can meet the requirements of medical intervention materials and achieve a breakthrough effect.

[0034] (2) The platinum-based multi-element alloy wire preparation method of the present invention first refines before melting, which can remove low melting point impurity metal elements, carbon and oxygen elements, etc. from the metal material, and avoid the breakage of the multi-element alloy ultrafine wire obtained later due to impurities and oxides; the melting adopts the intermediate alloy pre-melting method, which can obtain a more uniform ingot structure; after homogenization heat treatment, the platinum-based multi-element alloy ingot is rolled to obtain platinum-based multi-element alloy rods, and the platinum-based multi-element alloy rods are drawn once, heat treated, drawn twice, and annealed to obtain platinum-based multi-element alloy finished wires. The temperature and time of each stage of heat treatment and the deformation amount of each pass in the rolling and drawing process are designed to realize the heat treatment control of the platinum-based multi-element alloy wires, so that the obtained platinum-based multi-element alloy ultrafine wires have superior performance, further improving the tensile strength, elasticity, oxidation resistance and the clarity of X-ray development of the platinum-based multi-element alloy wires. Detailed Implementation

[0035] The present invention will be further described below with reference to specific embodiments.

[0036] Example 1

[0037] In this embodiment 1, the platinum-based multi-element alloy wire for X-ray imaging of the present invention comprises, by mass percentage: Pt: 88%, Ir: 8%, W: 1%, Ni: 3%.

[0038] In this embodiment 1, the preparation method of the platinum-based multi-element alloy wire for X-ray imaging of the present invention includes the following steps: mixing metals Pt, Ir, W, and Ni according to the above-mentioned mass percentages, and then refining them in a vacuum non-consumable arc furnace to obtain uniformly composed Pt-Ir-Ni master alloys and Pt-W-Ni master alloys. Before refining, the vacuum degree is evacuated to 10. -4 Pa, argon gas was introduced until the vacuum degree was 7×10⁻⁶. -1 The refining current for preparing the Pt-Ir-Ni master alloy was 250A, and the refining time was 10 min. The refining current for preparing the Pt-W-Ni master alloy was 270A, and the refining time was 10 min. The master alloys were melted and cast in a vacuum induction melting furnace, and the casting cooling method was water-cooled copper mold, resulting in a platinum-based multi-element alloy ingot with a fine equiaxed grain structure. The platinum-based multi-element alloy ingot was subjected to homogenization heat treatment at a temperature of 1200℃ for 180 min in a vacuum heat treatment method. The platinum-based multi-element alloy ingot after homogenization heat treatment was rolled. The deformation per rolling pass was 15%, and the total deformation was 70%. Annealing was then performed at a temperature of 800℃ for 160 min, resulting in a φ10mm platinum-based multi-element alloy bar. The platinum-based multi-element alloy bar is drawn with a deformation of 10% per drawing pass and a total deformation of 70%. Then, it undergoes annealing at 800℃ for 160 minutes using vacuum heat treatment to obtain a φ1mm platinum-based multi-element alloy wire. This wire undergoes a special heat treatment: holding it at 720℃ for 4 hours using vacuum heat treatment. The heat-treated wire is then drawn again with a deformation of 10% per drawing pass to obtain a φ0.02mm platinum-based multi-element alloy wire. Finally, the φ0.02mm wire undergoes annealing at 410℃ for 10 seconds using continuous argon protection to obtain the finished platinum-based multi-element alloy wire.

[0039] In this Example 1, the platinum-based multi-element alloy finished wire has a clear X-ray imaging effect, a strength of 1650 MPa, an elongation of 14%, and strong oxidation resistance.

[0040] Example 2

[0041] In this embodiment 2, the platinum-based multi-element alloy wire for X-ray imaging of the present invention comprises, by mass percentage: Pt: 89%, Ir: 3%, W: 6%, Ni: 2%.

[0042] In this embodiment 2, the preparation method of the platinum-based multi-element alloy wire for X-ray imaging of the present invention includes the following steps: mixing metals Pt, Ir, W, and Ni according to the above-mentioned mass percentages, and then refining them in a vacuum non-consumable arc furnace to obtain uniformly composed Pt-Ir-Ni master alloys and Pt-W-Ni master alloys. Before refining, the vacuum degree is evacuated to 10. -3 Pa, argon gas was introduced until the vacuum degree was 8×10⁻⁶. -1 The refining current for preparing the Pt-Ir-Ni master alloy was 140 A, and the refining time was 5 min. The refining current for preparing the Pt-W-Ni master alloy was 160 A, and the refining time was 5 min. The master alloys were melted and cast in a vacuum induction melting furnace, and the casting cooling method was water-cooled copper mold, resulting in a platinum-based multi-element alloy ingot with a fine equiaxed grain structure. The platinum-based multi-element alloy ingot was subjected to homogenization heat treatment at a temperature of 1000 °C for 240 min in a vacuum heat treatment manner. The platinum-based multi-element alloy ingot after homogenization heat treatment was rolled, and the deformation per rolling pass was 10%. When the total deformation was 60%, annealing was performed at a temperature of 1000 °C for 360 min, resulting in a φ6 mm platinum-based multi-element alloy bar. The bar stock is drawn with a deformation of 5% per drawing pass and a total deformation of 60%. Then, it undergoes annealing at 1000℃ for 360 minutes using vacuum heat treatment to obtain a φ0.5mm platinum-based multi-element alloy wire. This wire undergoes a special heat treatment: holding it at 750℃ for 2 hours using vacuum heat treatment. The heat-treated wire is then drawn again with a deformation of 5% per drawing pass to obtain a φ0.1mm platinum-based multi-element alloy wire. Finally, this wire undergoes annealing at 430℃ for 20 seconds using continuous argon protection to obtain the finished platinum-based multi-element alloy wire.

[0043] In this Example 2, the platinum-based multi-element alloy finished wire has a clear X-ray imaging effect, a strength of 1820 MPa, an elongation of 10.7%, and strong oxidation resistance.

[0044] Example 3

[0045] In this embodiment 3, the platinum-based multi-element alloy wire for X-ray imaging of the present invention comprises, by mass percentage: Pt: 90%, Ir: 2%, W: 7%, Ni: 1%.

[0046] In this embodiment 3, the preparation method of the platinum-based multi-element alloy wire for X-ray imaging of the present invention includes the following steps: mixing metals Pt, Ir, W, and Ni according to the above mass percentages, and then refining them in a vacuum non-consumable arc furnace to obtain uniformly composed Pt-Ir-Ni master alloys and Pt-W-Ni master alloys. Before refining, the vacuum degree is evacuated to 10. -3.5 Pa, filled with argon gas to a vacuum of 7.5 × 10⁻⁶. -1 The refining current for preparing the Pt-Ir-Ni master alloy was 200 A, and the refining time was 8 min. The refining current for preparing the Pt-W-Ni master alloy was 220 A, and the refining time was 8 min. The master alloys were melted and cast in a vacuum induction melting furnace, and the casting cooling method was water-cooled copper mold, resulting in a platinum-based multi-element alloy ingot with a fine equiaxed grain structure. The platinum-based multi-element alloy ingot was subjected to homogenization heat treatment at a temperature of 1300 °C for 200 min in a vacuum heat treatment method. The platinum-based multi-element alloy ingot after homogenization heat treatment was rolled. The deformation per rolling pass was 12%, and the total deformation was 65%. Annealing was then performed at a temperature of 900 °C for 240 min, resulting in a φ6 mm platinum-based multi-element alloy bar. The platinum-based multi-element alloy bar was then... The material is drawn with a deformation of 6% per drawing pass and a total deformation of 65%. Then, it is annealed at 900℃ for 250 minutes using vacuum heat treatment to obtain a φ0.1mm platinum-based multi-element alloy wire. The φ0.1mm platinum-based multi-element alloy wire undergoes a special heat treatment: holding it at 730℃ for 6 hours using vacuum heat treatment. After this special heat treatment, the platinum-based multi-element alloy wire is drawn again with a deformation of 6% per drawing pass to obtain a φ0.01mm platinum-based multi-element alloy wire. Finally, the φ0.01mm platinum-based multi-element alloy wire is annealed at 420℃ for 15 seconds using continuous argon protection to obtain the finished platinum-based multi-element alloy wire.

[0047] In this Example 3, the platinum-based multi-element alloy finished wire has a clear X-ray imaging effect, a strength of 1836 MPa, an elongation of 10.5%, and strong oxidation resistance.

[0048] Example 4

[0049] In this embodiment 4, the platinum-based multi-element alloy wire for X-ray imaging of the present invention comprises, by mass percentage: Pt: 90%, W: 7%, and Ni: 3%.

[0050] In this embodiment 4, the preparation method of the platinum-based multi-element alloy wire for X-ray imaging of the present invention includes the following steps: mixing metals Pt, W, and Ni according to the above-mentioned mass percentages and then refining them in a vacuum non-consumable arc furnace to obtain uniformly composed Pt-Ni master alloys and Pt-W master alloys. Before refining, the vacuum degree is evacuated to 10. -3 Pa, argon gas was introduced until the vacuum degree was 8×10⁻⁶. -1 The refining current for preparing the Pt-Ni master alloy was 220 A, and the refining time was 10 min. The refining current for preparing the Pt-W master alloy was 280 A, and the refining time was 10 min. The master alloys were melted and cast in a vacuum induction melting furnace, and the casting cooling method was water-cooled copper mold, resulting in a platinum-based multi-element alloy ingot with a fine equiaxed grain structure. The platinum-based multi-element alloy ingot was subjected to homogenization heat treatment at a temperature of 1000 °C for 220 min in a vacuum heat treatment method. The platinum-based multi-element alloy ingot after homogenization heat treatment was rolled. The deformation per rolling pass was 12%, and the total deformation was 65%. Annealing was then performed at a temperature of 900 °C for 200 min, resulting in a φ10 mm platinum-based multi-element alloy bar. The bar stock is drawn with a deformation of 10% per drawing pass and a total deformation of 70%. Then, it undergoes annealing at 900℃ for 200 minutes using vacuum heat treatment to obtain a φ1mm platinum-based multi-element alloy wire. This wire undergoes a special heat treatment: holding it at 730℃ for 4 hours using vacuum heat treatment. The heat-treated wire is then drawn again with a deformation of 8% per drawing pass to obtain a φ0.05mm platinum-based multi-element alloy wire. Finally, the φ0.05mm wire undergoes annealing at 420℃ for 10 seconds using continuous argon protection to obtain the finished platinum-based multi-element alloy wire.

[0051] In this Example 4, the platinum-based multi-element alloy finished wire has a clear X-ray imaging effect, a strength of 1700 MPa, an elongation of 12%, and strong oxidation resistance.

[0052] Example 5

[0053] In this embodiment 5, the platinum-based multi-element alloy wire for X-ray imaging of the present invention comprises, by mass percentage: Pt: 90%, W: 7%, and Ni: 3%.

[0054] In this embodiment 5, the preparation method of the platinum-based multi-element alloy wire for X-ray imaging of the present invention includes the following steps: mixing metals Pt, W, and Ni according to the above-mentioned mass percentages, and then refining them in a vacuum non-consumable arc furnace to obtain uniformly composed Pt-Ni master alloys and Pt-W master alloys. Before refining, the vacuum degree is evacuated to 10. -4 Pa, argon gas was introduced until the vacuum degree was 7×10⁻⁶. -1 The refining current for preparing the Pt-Ni master alloy was 140 A, and the refining time was 5 min. The refining current for preparing the Pt-W master alloy was 170 A, and the refining time was 5 min. The master alloys were melted and cast in a vacuum induction furnace, with water-cooled copper molds used for cooling, resulting in platinum-based multi-element alloy ingots with fine equiaxed grain structures. The platinum-based multi-element alloy ingots underwent homogenization heat treatment at 1300 °C for 180 min using a vacuum heat treatment method. The homogenized platinum-based multi-element alloy ingots were then rolled, with a deformation per rolling pass of 10% and a total deformation of 60%. Annealing was then performed at 800 °C for 160 min, yielding φ7 mm platinum-based multi-element alloy bars. The platinum-based multi-element alloy bars were then further processed... The wire was drawn with a deformation of 5% per pass and a total deformation of 60%. Then, it underwent annealing at 800℃ for 360 minutes under vacuum heat treatment to obtain a φ0.6mm platinum-based multi-element alloy wire. This wire underwent a special heat treatment at 720℃ for 6 hours under vacuum heat treatment. The heat-treated wire was then drawn again with a deformation of 5% per pass to obtain a φ0.1mm platinum-based multi-element alloy wire. Finally, the wire was annealed at 410℃ for 20 seconds under argon protection to obtain the finished platinum-based multi-element alloy wire.

[0055] In this Example 5, the platinum-based multi-element alloy finished wire exhibits clear X-ray imaging, a strength of 1720 MPa, an elongation of 11.5%, and strong oxidation resistance.

[0056] Example 6

[0057] In this embodiment 6, the platinum-based multi-element alloy wire for X-ray imaging of the present invention comprises, by mass percentage: Pt: 90%, W: 7%, and Ni: 3%.

[0058] In this embodiment 6, the preparation method of the platinum-based multi-element alloy wire for X-ray imaging of the present invention includes the following steps: mixing metals Pt, W, and Ni according to the above-mentioned mass percentages and then refining them in a vacuum non-consumable arc furnace to obtain uniformly composed Pt-Ni master alloys and Pt-W master alloys. Before refining, the vacuum degree is evacuated to 10. -3.5 Pa, filled with argon gas to a vacuum of 7.5 × 10⁻⁶. -1 The refining current for preparing the Pt-Ni master alloy was 200 A, and the refining time was 6 min. The refining current for preparing the Pt-W master alloy was 240 A, and the refining time was 6 min. The master alloys were melted and cast in a vacuum induction melting furnace, and the casting cooling method was water-cooled copper mold, resulting in a platinum-based multi-element alloy ingot with a fine equiaxed grain structure. The platinum-based multi-element alloy ingot was subjected to homogenization heat treatment at 1200 °C for 240 min in a vacuum heat treatment method. The platinum-based multi-element alloy ingot after homogenization heat treatment was rolled. The deformation per rolling pass was 15%, and the total deformation was 70%. Annealing was then performed at 1000 °C for 360 min, resulting in a φ6 mm platinum-based multi-element alloy bar. The platinum-based multi-element alloy bar was then further processed... The wire was drawn with a deformation of 7% per pass and a total deformation of 66%. Annealing was then performed at 1000℃ for 160 minutes using vacuum heat treatment to obtain a φ0.1mm platinum-based multi-element alloy wire. This wire underwent a special heat treatment: holding it at 750℃ for 2 hours using vacuum heat treatment. The heat-treated wire was then drawn again with a deformation of 10% per pass to obtain a φ0.01mm platinum-based multi-element alloy wire. Finally, this wire was annealed at 430℃ for 15 seconds using continuous argon protection to obtain the finished platinum-based multi-element alloy wire.

[0059] In this Example 6, the platinum-based multi-element alloy finished wire has a clear X-ray imaging effect, a strength of 1670 MPa, an elongation of 13.5%, and strong oxidation resistance.

[0060] Obviously, the above embodiments are merely some, not all, of the embodiments of the present invention. The above embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without inventive effort, that is, all modifications, equivalent substitutions, and improvements made within the spirit and principle of this application, fall within the scope of protection claimed by the present invention.

Claims

1. A platinum-based multi-element alloy wire for X-ray imaging, characterized in that, The material is composed of the following components by mass percentage: Pt: 88-90%, Ir: 0-8%, W: 1-7%, Ni: 1-3%; the tensile strength of the platinum-based multi-element alloy wire for X-ray imaging is greater than 1600 MPa and the elongation is greater than 10%.

2. A method for preparing the platinum-based multi-element alloy wire for X-ray imaging as described in claim 1, characterized in that, Includes the following steps: Step 1: Refining The metals Pt, Ir, W, and Ni are mixed in the above mass percentages and then refined to obtain Pt-Ir-Ni master alloys and Pt-W-Ni master alloys; or the metals Pt, W, and Ni are mixed and then refined to obtain Pt-Ni master alloys and Pt-W master alloys. Step 2: Melting and Casting The intermediate alloy is melted and cast to obtain a platinum-based multi-element alloy ingot; Step 3: Homogenization The platinum-based multi-element alloy ingot is subjected to homogenization heat treatment; Step 4: Rolling The platinum-based multi-element alloy ingots after homogenization heat treatment are rolled to obtain platinum-based multi-element alloy bars with a diameter of φ 6-10mm. Step 5: One pull The platinum-based multi-element alloy rod is drawn to obtain a platinum-based multi-element alloy wire with a diameter of φ 0.1-1mm; Step 6: Heat treatment The platinum-based multi-element alloy wire obtained in step 5 is subjected to heat treatment. The heat treatment is to keep the platinum-based multi-element alloy wire obtained in step 5 at 720-750℃ for 2-6 hours. The heat treatment method is vacuum heat treatment. Step 7: Secondary pulling The platinum-based multi-element alloy wire after heat treatment in step 6 is drawn to obtain a platinum-based multi-element alloy wire with a diameter of φ 0.01-0.1mm. Step 8: Annealing The platinum-based multi-element alloy wire obtained in step 7 is annealed to obtain the finished platinum-based multi-element alloy wire.

3. The method for preparing platinum-based multi-element alloy wire for X-ray imaging according to claim 2, characterized in that, In step 1, a vacuum non-consumable arc furnace is used for refining. Before refining, the vacuum level is evacuated to 10. -4 Pa~10 -3 Pa, argon gas is introduced until the vacuum degree is (7-8)×10. -1 For the preparation of Pt-Ir-Ni master alloy, the refining current is 140-250A and the refining time is 5-10min; for the preparation of Pt-W-Ni master alloy, the refining current is 160-270A and the refining time is 5-10min; for the preparation of Pt-Ni master alloy, the refining current is 140-220A and the refining time is 5-10min; and for the preparation of Pt-W master alloy, the refining current is 170-280A and the refining time is 5-10min.

4. The method for preparing platinum-based multi-element alloy wire for X-ray imaging according to claim 2, characterized in that, In step 2, a vacuum induction melting furnace is used for melting, and a water-cooled copper mold is used for casting.

5. The method for preparing platinum-based multi-element alloy wire for X-ray imaging according to claim 2, characterized in that, In step 3, the homogenization heat treatment is carried out at a temperature of 1000-1300℃ for 180-240 minutes, and is performed by vacuum heat treatment.

6. The method for preparing platinum-based multi-element alloy wire for X-ray imaging according to claim 2, characterized in that, In step 4, when the deformation amount of each rolling pass is 10-15% and the total deformation amount is 60-70%, annealing is performed at a temperature of 800-1000℃ and an annealing time of 160-360min.

7. The method for preparing platinum-based multi-element alloy wire for X-ray imaging according to claim 2, characterized in that, In step 5, when the deformation of each drawing pass is 5%-10% and the total deformation is 60%-70%, annealing is performed. The annealing temperature is 800-1000℃, the annealing time is 160-360min, and the annealing method is vacuum heat treatment.

8. The method for preparing platinum-based multi-element alloy wire for X-ray imaging according to claim 2, characterized in that, In step 7, the deformation amount of each drawing pass is 5%-10%.

9. The method for preparing platinum-based multi-element alloy wire for X-ray imaging according to claim 2, characterized in that, In step 8, the annealing temperature is 410-430℃, the annealing time is 10-20s, and the annealing method is continuous annealing under argon protection.