An oxide-strengthened platinum-based composite material

Abstract

The present invention discloses an oxide-strengthened platinum-based composite material, belonging to the technical field of platinum-based materials. The oxide-strengthened platinum-based composite material of the present invention comprises components with the following mass percentages: Hf: 1% to 7.0%, Sc: 0.1% to 2.0%, Y: 0.01% to 0.2%, O: 0.23% to 2.3%, Rh: 0 to 7%, and the balance is platinum; the preparation method includes: arc melting, rolling, annealing treatment, cold drawing, heat treatment, and internal oxidation to obtain the oxide-strengthened platinum-based composite material. The present invention improves the performance of the oxide-strengthened platinum-based composite material by regulating the component content and optimizing the preparation method. Moreover, the preparation method of the oxide-strengthened platinum-based composite material has a simple process and a short preparation time, achieving the purpose of saving time and improving performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of platinum-based materials, and particularly relates to an oxide-strengthened platinum-based composite material. Background Art

[0002] Oxide-strengthened platinum composite materials mainly include platinum and platinum-rhodium-based composite materials strengthened by oxides such as ZrO2, CeO2, and Y2O3. Due to the excellent internal corrosion resistance, oxidation resistance, creep resistance and other properties of such materials, they are widely used in applications such as fiberglass manufacturing, crystal growth, heating wires, and nozzles. The main microstructural characteristics of such composite materials are: fine oxide particles are dispersed in the alloy matrix and grain boundaries, which can effectively pin the grain boundaries and hinder the movement of dislocations, resulting in better creep resistance, stable grain structure and mechanical properties of the material at high temperatures. However, at present, only one of ZrO2, CeO2, and Y2O3 is used as the strengthening phase in such materials, and its strengthening effect is very limited. Moreover, the strengthening phase is mainly distributed at the grain boundary positions, resulting in poor mechanical properties of the material, especially the mechanical properties at high temperatures. Summary of the Invention

[0003] Aiming at the above-mentioned disadvantages of the prior art, the present invention provides an oxide-strengthened platinum-based composite material.

[0004] To achieve the above object, the technical solution adopted by the present invention is: an oxide-strengthened platinum-based composite material, by adjusting the component content and optimizing the preparation method, to improve the performance of the oxide-strengthened platinum-based composite material; the oxide-strengthened platinum-based composite material includes the following components in mass percentage: Hf: 1% - 7.0%, Sc: 0.1% - 2.0%, Y: 0.01% - 0.2%, O: 0.23% - 2.3%, Rh: 0 - 7%, and the balance is platinum.

[0005] The preparation method of the oxide-strengthened platinum-based composite material includes the following steps:

[0006] (1) Weigh the raw materials according to the component content of the oxide-strengthened platinum-based composite material, and perform arc melting processing on the raw materials in an argon atmosphere to obtain a button-shaped ingot.

[0007] (2) Use an X-ray fluorescence analyzer to measure whether the alloy content on both sides of the button-shaped ingot is uniform. If it is not uniform, place the bottom surface of the ingot upward, and perform multiple meltings through the arc melting process in step (1) until the alloy content on both sides of the ingot is uniform.

[0008] (3) Then perform rolling, annealing treatment, cold drawing, and heat treatment in sequence to obtain wire or sheet platinum materials.

[0009] (4) Place the wire or sheet platinum material in the atmosphere at 1100 - 1250 °C for 5 - 70 hours.

[0010] As a preferred embodiment of the present invention, the raw materials are metal Hf, metal Sc, metal Y, and a substrate raw material; the substrate raw material is pure Pt or a mixture of pure Pt and metal Rh. Compared with the raw materials being oxides, all the raw materials of the present invention are in a metallic state, and the compositional uniformity of the alloy formed by arc melting can be better controlled, and there is no compositional segregation and non-uniform microstructure.

[0011] As a preferred embodiment of the present invention, the arc melting specifically includes the following steps: First, the pre-vacuum degree is <1×10 -2 Pa, and then argon gas with a pressure of 0.9 - 1.0 atmospheres is filled for melting. The melting current is 50 - 300 A, the melting time is 10 - 60 seconds, and finally a button-shaped ingot is obtained.

[0012] As a preferred embodiment of the present invention, in the step (3), the rolling temperature is room temperature, and the reduction per pass of rolling is 1% - 5%.

[0013] As a preferred embodiment of the present invention, in the step (3), the reduction per pass of cold drawing is 1% - 5%.

[0014] As a preferred embodiment of the present invention, in the step (3), the annealing treatment temperature is 1100 °C, and the time is 2 hours.

[0015] As a preferred embodiment of the present invention, in the step (3), the heat treatment temperature is 1100 °C.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, Hf, Sc, and Y are alloy-melted through processes such as arc melting, rolling, annealing, drawing, heat treatment, and internal oxidation to obtain three oxides, HfO2, Sc2O3, and Y2O3, as strengthening phases to strengthen the platinum-based material, and the distribution of the oxides in the platinum-based material is regulated. Among them, HfO2 and Sc2O3 are mainly distributed inside the Pt grains, and Y2O3 is mainly distributed at the grain boundary positions. The comprehensive strengthening effect of the three oxides is significantly improved. Moreover, the preparation method of the oxide-strengthened platinum-based composite material has a simple process. By combining the regulation of the ratios of the three alloying elements, the purpose of adjusting the preparation time and controlling the generation positions of the three oxides is achieved, thereby improving the performance of the material. Specific Embodiments

[0017] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0018] Example 1

[0019] A method for preparing an oxide-strengthened platinum-based composite material includes the following steps:

[0020] (1) Weigh the raw materials for the ingot blank according to the material ratio of 7% of metallic Hf, 0.1% of metallic Sc, 0.01% of metallic Y, and the balance being pure Pt.

[0021] (2) Put the ingot blank raw materials into an arc furnace for arc melting; the specific process is as follows: First, the preliminary vacuum degree is <1×10 -1 Pa, and then fill it with argon gas with a pressure of 1.0 atmospheric pressure and a purity of 99.999% for melting. The vacuum pumping and gas filling are repeated 4 times; then carry out arc melting. The melting current is 300 A and the melting time is 10 seconds. After observing that a button-shaped ingot is formed, stop the melting to obtain a button-shaped ingot.

[0022] (3) After taking out and polishing the upper and lower surfaces of the button-shaped ingot, use an X-ray fluorescence analyzer to measure whether the contents of Hf, Sc, and Y on both sides of the ingot are uniform and whether the concentrations reach 7%, 0.1%, and 0.01%. If they are not uniform and the concentrations do not reach the requirements, place the bottom surface of the ingot upward and carry out arc melting, repeating steps (1) and (2) until the contents of Hf, Sc, and Y on both sides of the ingot are basically uniform.

[0023] (4) Roll the ingot at room temperature with a pass reduction of 1% to roll it into a wire with a diameter of 10 mm, and anneal it at 1100 °C for 2 hours.

[0024] (5) Then carry out cold drawing with a pass reduction of 1%, and then heat treat it at 1100 °C. The sample is repeatedly processed in this way, and finally a wire with a diameter of 0.1 mm is obtained.

[0025] (6) Oxidize the wire in the air at 1250 °C for 5 hours to prepare an oxide-strengthened platinum-based composite material.

[0026] In the oxide-strengthened platinum-based composite material prepared in Example 1, HfO2 and Sc2O3 are mainly distributed inside the matrix grains, and Y2O3 is mainly distributed at the grain boundaries. The tensile strength of the oxide-strengthened platinum-based composite material at 1100 °C is 150 MPa, and the tensile strength at room temperature is 350 MPa.

[0027] Example 2

[0028] A method for preparing an oxide-strengthened platinum-based composite material includes the following steps:

[0029] (1) Weigh the raw materials for the ingot blank according to the material ratio of 1% of metallic Hf, 2% of metallic Sc, 0.2% of metallic Y, and the balance being pure Pt.

[0030] (2) Put the ingot blank raw materials into an arc furnace for arc melting; the specific process is as follows: First, the preliminary vacuum degree is <1×10-1 Pa, and then charge it with argon at a pressure of 1.0 atm and a purity of 99.999% for melting. Repeat the processes of evacuating and charging four times; then carry out arc melting with a melting current of 100 A and a melting time of 50 s. Stop melting after observing the formation of a button-shaped ingot to obtain a button-shaped ingot.

[0031] (3) After grinding the upper and lower surfaces of the button-shaped ingot, use an X-ray fluorescence analyzer to measure whether the contents of Hf, Sc, and Y on both sides of the ingot are uniform and whether the concentrations reach 1%, 2%, and 0.2%. If they are not uniform and the concentrations do not reach the requirements, place the bottom surface of the ingot upward and carry out arc melting. Repeat steps (1) and (2) until the contents of Hf, Sc, and Y on both sides of the ingot are basically uniform.

[0032] (4) Roll the ingot at room temperature with a pass reduction of 3% into a wire with a diameter of 5 mm, and anneal it at 1100 °C for 2 hours.

[0033] (5) Then carry out cold drawing with a pass reduction of 3%, and then heat-treat it at 1100 °C. Repeat this treatment process for the sample until a wire with a diameter of 0.1 mm is finally obtained.

[0034] (6) Oxidize the wire in air at 1100 °C for 70 hours to prepare an oxide-strengthened platinum-based composite material.

[0035] In the oxide-strengthened platinum-based composite material prepared in Example 2, HfO2 and Sc2O3 are mainly distributed inside the matrix grains, and Y2O3 is mainly distributed at the grain boundaries. The tensile strength of the oxide-strengthened platinum-based composite material at 1100 °C is 148 MPa, and the tensile strength at room temperature is 352 MPa.

[0036] Example 3

[0037] A preparation method of an oxide-strengthened platinum-based composite material includes the following steps:

[0038] (1) According to the material ratio of 4% of metal Hf, 1% of metal Sc, 0.2% of metal Y, and the balance being pure Pt, weigh the raw materials for the melting ingot blank.

[0039] (2) Put the ingot blank raw materials into an arc furnace for arc melting; the specific process is as follows: First, the pre-evacuated vacuum degree is <1×10 -1 Pa, and then charge it with argon at a pressure of 1.0 atm and a purity of 99.999% for melting. Repeat the processes of evacuating and charging four times; then carry out arc melting with a melting current of 100 A and a melting time of 40 s. Stop melting after observing the formation of a button-shaped ingot to obtain a button-shaped ingot.

[0040] (3) After polishing the upper and lower surfaces of the button-shaped ingot, use an X-ray fluorescence analyzer to measure whether the contents of Hf, Sc, and Y on both sides of the ingot are uniform and whether the concentrations reach 4%, 1%, and 0.2%. If they are not uniform and the concentrations do not reach the requirements, place the bottom surface of the ingot upward and perform arc melting. Repeat steps (1) and (2) until the contents of Hf, Sc, and Y on both sides of the ingot are basically uniform.

[0041] (4) Roll the ingot at room temperature with a pass deformation of 5% into a sheet with a thickness of 10 mm, and anneal it at 1100 °C for 2 hours.

[0042] (5) Then, perform cold drawing with a pass deformation of 5%, and then perform heat treatment at 1100 °C. Repeat this treatment process for the sample until a sheet with a diameter of 0.07 mm is finally obtained.

[0043] (6) Oxidize the sheet in the atmosphere at 1150 °C for 50 hours to prepare an oxide-strengthened platinum-based composite material.

[0044] In the oxide-strengthened platinum-based composite material prepared in Example 3, HfO2 and Sc2O3 are mainly distributed inside the matrix grains, and Y2O3 is mainly distributed at the grain boundaries. The tensile strength of the oxide-strengthened platinum-based composite material at 1100 °C is 151 MPa, and the tensile strength at room temperature is 348 MPa.

[0045] Example 4

[0046] A preparation method of an oxide-strengthened platinum-based composite material includes the following steps:

[0047] (1) According to the material ratio of 1% of metal Hf, 0.1% of metal Sc, 0.01% of metal Y, 7% of metal Rh, and the balance being pure Pt, weigh the raw materials for the melting ingot blank.

[0048] (2) Place the ingot blank raw materials into an arc furnace for arc melting; the specific process is as follows: First, the pre-vacuum degree is <1×10 -1 Pa, and then fill it with argon with a pressure of 99.999% of 1.0 atmospheric pressure for melting. Repeat the vacuum pumping and gas filling 4 times in total; then perform arc melting. The melting current is 300 A, and the melting time is 10 seconds. After observing that a button-shaped ingot is formed, stop melting to obtain a button-shaped ingot.

[0049] (3) After polishing the upper and lower surfaces of the button-shaped ingot, use an X-ray fluorescence analyzer to measure whether the contents of Hf, Sc, and Y on both sides of the ingot are uniform and whether the concentrations reach 1%, 0.1%, and 0.01%. If they are not uniform and the concentrations do not reach the requirements, place the bottom surface of the ingot upward and perform arc melting. Repeat steps (1) and (2) until the contents of Hf, Sc, and Y on both sides of the ingot are basically uniform.

[0050] (4) Roll the spindle at room temperature with a per-pass deformation of 5% to form a wire with a diameter of 4 mm, and anneal it at 1100 °C for 2 hours.

[0051] (5) Then, perform cold drawing with a per-pass deformation of 5%, and then perform heat treatment at 1100 °C. Repeat this treatment process for the sample until a wire with a diameter of 0.01 mm is finally obtained.

[0052] (6) Oxidize the wire in air at 1200 °C for 10 hours to prepare an oxide-strengthened platinum-based composite material.

[0053] In the oxide-strengthened platinum-based composite material prepared in Example 4, HfO2 and Sc2O3 are mainly distributed inside the matrix grains, and Y2O3 is mainly distributed at the grain boundaries. The tensile strength of the oxide-strengthened platinum-based composite material at 1100 °C is 145 MPa, and the tensile strength at room temperature is 346 MPa.

[0054] Comparative Example 1

[0055] The preparation method of an oxide-strengthened platinum-based composite material is only different from that in Example 1 in that: in step (1), according to the material ratio of 7% metal Hf, 0.1% metal Sc, and the balance being pure Pt, weigh the raw materials for the melting ingot blank;

[0056] In step (6), oxidize the wire in air at 1250 °C for 80 hours to prepare an oxide-strengthened platinum-based composite material.

[0057] Compared with the example, in the microstructure of the oxide-strengthened platinum-based composite material obtained in this Comparative Example 1, the formed HfO2 and Sc2O3 oxides are mainly located inside the grains, and the distribution of oxides at the grain boundaries is less, lacking the grain boundary strengthening effect, thus affecting the high-temperature strengthening effect of the material. The tensile strength of the oxide-strengthened platinum-based composite material prepared in this comparative example at 1100 °C is 100 MPa, and the tensile strength at room temperature is 246 MPa.

[0058] Comparative Example 2

[0059] The preparation method of an oxide-strengthened platinum-based composite material is only different from that in Example 1 in that: in step (1), according to the material ratio of 7% metal Hf, 0.01% metal Y, and the balance being pure Pt, weigh the raw materials for the melting ingot blank;

[0060] In step (6), oxidize the wire in air at 1250 °C for 85 hours to prepare an oxide-strengthened platinum-based composite material.

[0061] Compared with the example, in the microstructure of the oxide-strengthened platinum-based composite material obtained in this comparative example 2, the formed HfO2 oxide is mainly located inside the grains, Y2O3 is mainly distributed at the grain boundaries and the quantity is small, the distribution of the oxides at the grain boundaries is less, and the strengthening effect of Sc2O3 oxide on the grains and grain boundaries is lacking, thus affecting the high-temperature strengthening effect of the material. The tensile strength of the oxide-strengthened platinum-based composite material prepared in this comparative example is 96 MPa at 1100 °C and 240 MPa at room temperature.

[0062] Comparative Example 3

[0063] The only difference between the preparation method of an oxide-strengthened platinum-based composite material and Example 1 is that in step (1), according to the material ratio of 0.1% of metal Sc, 0.01% of metal Y, and the balance being pure Pt, the raw materials for the melting ingot blank are weighed.

[0064] In step (6), the wire is internally oxidized in the atmosphere at 1250 °C for 100 hours to prepare the oxide-strengthened platinum-based composite material.

[0065] Compared with the example, in the microstructure of the oxide-strengthened platinum-based composite material obtained in this comparative example 3, a small amount of Sc2O3 oxide is mainly located inside the grains, Y2O3 is distributed at the grain boundaries and the quantity is small, and the dispersion strengthening effect of a large amount of HfO2 oxide in the grains is lacking, thus affecting the high-temperature strengthening effect of the material. The tensile strength of the oxide-strengthened platinum-based composite material prepared in this comparative example is 80 MPa at 1100 °C and 221 MPa at room temperature.

[0066] Comparative Example 4

[0067] The only difference between the preparation method of an oxide-strengthened platinum-based composite material and Example 1 is that in step (1), according to the material ratio of 7% of metal Hf, 0.11% of metal Y, and the balance being pure Pt, the raw materials for the melting ingot blank are weighed.

[0068] In step (6), the wire is internally oxidized in the atmosphere at 1250 °C for 85 hours to prepare the oxide-strengthened platinum-based composite material.

[0069] Compared with the example, in the microstructure of the oxide-strengthened platinum-based composite material obtained in this comparative example 4, the formed HfO2 oxide is mainly located inside the grains, Y2O3 is mainly distributed at the grain boundaries and the quantity is small, and the strengthening effect of Sc2O3 oxide on the grains and grain boundaries is lacking, thus affecting the high-temperature strengthening effect of the material. The tensile strength of the oxide-strengthened platinum-based composite material prepared in this comparative example is 110 MPa at 1100 °C and 252 MPa at room temperature.

[0070] Comparative Example 5

[0071] The preparation method of an oxide-strengthened platinum-based composite material is only different from Example 1 in that: in step (1), according to the material ratio of 7.11% of metal Hf and the balance being pure Pt, the raw materials for the melting ingot blank are weighed.

[0072] In step (6), the wire is subjected to internal oxidation in air at 1250 °C for 85 hours to prepare the oxide-strengthened platinum-based composite material.

[0073] Compared with the example, in the structure of the oxide-strengthened platinum-based composite material obtained in this Comparative Example 5, the formed HfO2 oxide is mainly located inside the grains, lacking the strengthening effect of Y2O3 and Sc2O3 on the grain boundaries, thus affecting the high-temperature strengthening effect of the material. The tensile strength of the oxide-strengthened platinum-based composite material prepared in this comparative example is 72 MPa at 1100 °C and 213 MPa at room temperature.

[0074] Comparative Example 6

[0075] A preparation method of an oxide-strengthened platinum-based composite material comprises the following steps:

[0076] (1) According to the material ratio of 7% of metal Hf, 0.1% of metal Sc, 0.01% of metal Y, and the balance being pure Pt, the raw materials for the melting ingot blank are weighed.

[0077] (2) The ingot blank raw materials are put into an electric arc furnace for electric arc melting; the specific process is: first, the vacuum degree is pumped to <1×10 -1 Pa, and then argon gas containing 0.01% (volume ratio) oxygen at a pressure of 1.0 atmospheric pressure is filled for melting. The vacuum pumping and gas filling are repeated 4 times in total; then electric arc melting is carried out. The melting current is 300 A and the melting time is 10 seconds. After observing that a button-shaped ingot is formed, the melting is stopped to obtain a button-shaped ingot.

[0078] (3) After taking out and polishing the upper and lower surfaces of the button-shaped ingot, an X-ray fluorescence analyzer is used to measure whether the contents of Hf, Sc, and Y on both sides of the ingot are uniform and whether the concentrations reach 7%, 0.1%, and 0.01%. If they are not uniform and the concentrations do not reach, the bottom surface of the ingot is facing up, and electric arc melting is carried out. Repeat steps (1) and (2) until the contents of Hf, Sc, and Y on both sides of the ingot are basically uniform.

[0079] (4) The ingot is rolled at room temperature with a pass deformation of 1% into a wire with a diameter of 10 mm and annealed at 1100 °C for 2 hours.

[0080] (5) Then, it is cold drawn with a per-pass deformation of 1%, and then heat treated at 1100 °C. The sample is repeatedly processed in this way, and finally a wire with a diameter of 0.1 mm is obtained, which is the oxide-strengthened platinum-based composite material.

[0081] Due to the oxygen in the atmosphere during the arc melting process, a large amount of Hf and Sc with relatively high contents in the alloying elements are oxidized, forming oxides and floating to the surface of the ingot, which seriously affects the quality of the ingot, resulting in insufficient oxides, a significant decrease in the strengthening effect, deviation of the ingot composition, and ultimately serious deterioration of the material properties. The tensile strength of the oxide-strengthened platinum-based composite material prepared in this comparative example at 1100 °C is 102 MPa, and the tensile strength at room temperature is 238 MPa.

[0082] Comparative Example 7

[0083] A preparation method of an oxide-strengthened platinum-based composite material includes the following steps:

[0084] (1) According to the material ratio of 7% of metal Hf, 0.1% of metal Sc, 0.01% of metal Y, and the balance being pure Pt, the raw materials for the melting ingot blank are weighed.

[0085] (2) Put the ingot blank raw materials into a high-frequency induction furnace for melting. When melting, the pre-vacuum degree is <1×10 -1 Pa, and then argon gas with a pressure of 1.0 atmospheric pressure and a purity of 99.999% is charged for melting, and it is cast into a crystallization mold.

[0086] (3) Then take out the ingot, and use an X-ray fluorescence analyzer to measure whether the contents of Hf, Sc, and Y on both sides of the ingot are uniform and whether the concentrations reach 7%, 0.1%, and 0.01%. If they are not uniform and the concentrations do not reach the requirements, turn the bottom of the ingot upwards and perform arc melting. Repeat steps (1) and (2) until the contents of Hf, Sc, and Y on both sides of the ingot are basically uniform.

[0087] (4) Roll the ingot into a wire with a diameter of 10 mm at room temperature and anneal it at 1100 °C for 2 hours.

[0088] (5) Then, it is cold drawn with a per-pass deformation of 1%, and then heat treated at 1100 °C. The sample is repeatedly processed in this way, and finally a wire with a diameter of 0.1 mm is obtained.

[0089] (6) Oxidize the wire in the atmosphere at 1250 °C for 50 hours to prepare the oxide-strengthened platinum-based composite material.

[0090] Since the melting of Hf metal in a high-frequency induction furnace takes a long time, a large amount of rare earths Sc and Y are easily ablated during the melting process, resulting in a significant reduction in the amount of Sc and Y that can be oxidized during subsequent internal oxidation, and the process parameters are difficult to control, resulting in poor consistency of the ingot quality. The tensile strength of the oxide-reinforced platinum-based composite material prepared in this comparative example is 62 MPa at 1100 °C and 205 MPa at room temperature.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A platinum-based composite material strengthened by an oxide, characterized in that, By regulating the component content and optimizing the preparation method, the performance of the oxide-strengthened platinum-based composite material is improved; The oxide-strengthened platinum-based composite material comprises components with the following mass percentages: Hf: 1% to 7.0%, Sc: 0.1% to 2.0%, Y: 0.01% to 0.2%, O: 0.23% to 2.3%, Rh: 0 to 7%, and the balance is platinum; The preparation method of the oxide-strengthened platinum-based composite material comprises the following steps: (1) Weigh raw materials according to the component content of the oxide-strengthened platinum-based composite material, and perform arc melting on the raw materials in an argon atmosphere to obtain a button-shaped ingot; (2) Use an X-ray fluorescence analyzer to measure whether the alloy content on both sides of the button-shaped ingot is uniform. If it is not uniform, place the bottom surface of the ingot upward, and perform multiple meltings through the arc melting process in step (1) until the alloy content on both sides of the ingot is uniform; (3) Then perform rolling, annealing treatment, cold drawing, and heat treatment in sequence to obtain wire or sheet platinum materials; (4) Place the wire or sheet platinum material in the atmosphere at 1100 - 1250 °C for 5 - 70 hours.

2. The oxide-reinforced platinum-based composite material according to claim 1, wherein The raw materials are metallic Hf, metallic Sc, metallic Y, and a base raw material; the base raw material is pure Pt or a mixture of pure Pt and metallic Rh.

3. The oxide-strengthened platinum-based composite material according to claim 1, wherein The arc melting specifically includes the following steps: First, the preliminary vacuum degree is <1×10 -2 Pa, then argon gas with a pressure of 0.9 - 1.0 atmospheres is filled for melting. The melting current is 50 - 300 A, and the melting time is 10 - 60 seconds. Finally, a button-shaped ingot is obtained.

4. The oxide-strengthened platinum-based composite material according to claim 1, wherein In step (3), the rolling temperature is room temperature, and the pass deformation amount of rolling is 1% - 5%.

5. The oxide-strengthened platinum-based composite material according to claim 1, wherein In step (3), the pass deformation amount of cold drawing is 1% - 5%.

6. The oxide-strengthened platinum-based composite material according to claim 1, wherein In step (3), the annealing treatment temperature is 1100 °C, and the time is 2 hours.

7. The oxide-strengthened platinum-based composite material according to claim 1, wherein In step (3), the heat treatment temperature is 1100 °C.