Preparation method and application of molybdenum-titanium alloy material

Abstract

The invention relates to the technical field of molybdenum-titanium alloy materials, in particular to a preparation method and application of a molybdenum-titanium alloy material.The preparation method of the molybdenum-titanium alloy material comprises the following steps that 1, molybdenum powder and titanium powder are fully mixed under protection of inert gas through a ball mill; 2, the mixed powder is subjected to pressure forming, and a billet is formed; 3, heating and sintering the billet under the protection of inert gas; and 4, the sintered compact alloy block is machined into a product through forging, rolling or extruding. According to the prepared molybdenum-titanium alloy material, in the preparation process, after molybdenum powder and titanium powder are treated through deionized water, some impurities on the surfaces can be removed, after the molybdenum powder and the titanium powder are wrapped with water, oxygen is not prone to being accumulated on the surfaces, in the subsequent ball milling process, oxygen can be effectively prevented from being clamped between the molybdenum powder and the titanium powder, and the service life of the molybdenum-titanium alloy material is prolonged. And the molybdenum powder and the titanium powder are not prone to being oxidized, finally, the billet is not prone to cracking in the sintering process, and the product quality is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of molybdenum-titanium alloy materials technology, and in particular to a method for preparing molybdenum-titanium alloy materials and their applications. Background Technology

[0002] Molybdenum-titanium alloys are alloys based on molybdenum with the addition of a small amount of titanium. The most famous molybdenum-titanium alloy is Mo-0.5Ti. The main methods for preparing molybdenum-titanium alloys include powder metallurgy and smelting. In powder metallurgy, high-purity molybdenum powder, titanium hydride powder, and graphite powder are mixed according to the required composition, then pressed into ingots using a die or isostatic pressing, and finally sintered under hydrogen protection by vertical melting or indirect heating. In smelting, high-purity molybdenum bars, carbon-containing molybdenum bars, and the alloying element titanium are melted into ingots using vacuum arc melting or electron beam melting according to requirements.

[0003] During the preparation of molybdenum-titanium alloys, cracking of the alloy block may occur during the sintering process. This is mainly because both molybdenum and titanium powders are highly susceptible to oxidation. The oxides on the powder surface (such as TiO2 and MoO3) hinder the diffusion of metal atoms and interparticle bonding during sintering, forming weak zones that become crack initiation sites under stress. Furthermore, the oxygen absorption of titanium can lead to the formation of brittle phases (such as oxygen-stabilized α phases). Therefore, we propose a method for preparing molybdenum-titanium alloy materials and their applications to address these problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for preparing molybdenum-titanium alloy materials and their applications.

[0005] A method for preparing a molybdenum-titanium alloy material includes the following steps:

[0006] Step 1: Use a ball mill to thoroughly mix molybdenum powder and titanium powder under inert gas protection;

[0007] Step 2: The mixed powder is pressed and molded into a billet;

[0008] Step 3: The billet is heated and sintered under inert gas protection at a temperature of 1200-1600℃ for 2-12 hours to form a dense alloy block.

[0009] Step 4: The sintered dense alloy block is processed into products by forging, rolling or extrusion.

[0010] In step 1, the molybdenum powder and titanium powder contain water before mixing, and the water content in the mixture of molybdenum powder and titanium powder is 5%-30%.

[0011] Preferably, in step 1, molybdenum powder and titanium powder are added to deionized water, the deionized water is heated to boiling, kept warm for 20-30 minutes, and after standing, excess water is removed while it is still hot, so that the water content of molybdenum powder and titanium powder is controlled to 5%-30%, and the molybdenum powder and titanium powder are quickly placed into a ball mill.

[0012] Preferably, in step 1, when removing excess moisture from molybdenum powder and titanium powder, the temperature of the mixture should be kept above 80°C, and the excess moisture should be removed by filtration, centrifugation or pouring.

[0013] Preferably, in step 1, the mass fraction of titanium powder in the mixture of molybdenum powder and titanium powder is 0.45%-0.55%.

[0014] Preferably, in step 1, a vacuum process is performed before the inert gas is introduced into the ball mill. After ball milling, the ball milling endpoint is reached when no water vapor is detected at the gas outlet, and the ball milling temperature is 60-80℃.

[0015] Preferably, the inert gas in step 1 is one of nitrogen, helium, neon and argon, and the inert gas in step 2 is one of helium, neon and argon.

[0016] Preferably, in step 2, the pressure applied during molding is 150-400 MPa.

[0017] Preferably, in step 4, when the dense alloy block is processed into a product, the deformation is controlled within 40%–80%.

[0018] Preferably, in step 4, after obtaining the product, the product is subjected to annealing treatment.

[0019] Preferably, the above-mentioned molybdenum-titanium alloy material is used in the field of target materials.

[0020] The beneficial effects of this invention are as follows: In the preparation process of the molybdenum-titanium alloy material used in this invention, after the molybdenum powder and titanium powder are treated with deionized water, some impurities on the surface can be removed. After the molybdenum powder and titanium powder are coated with water, oxygen is not easily accumulated on the surface. In the subsequent ball milling process, oxygen can be effectively avoided from being trapped between the molybdenum powder and titanium powder. The molybdenum powder and titanium powder are not easily oxidized, and the ingot is not easy to crack during the final sintering process, thus ensuring the quality of the product. Detailed Implementation

[0021] The present invention will be further explained below with reference to specific embodiments.

[0022] In Example 1, a method for preparing a molybdenum-titanium alloy material includes the following steps:

[0023] Step 1: Use a ball mill to thoroughly mix molybdenum powder and titanium powder under inert gas protection;

[0024] Step 2: The mixed powder is pressed and molded into a billet;

[0025] Step 3: The billet is heated and sintered under inert gas protection at a temperature of 1200℃ for 12 hours to form a dense alloy block.

[0026] Step 4: The sintered dense alloy block is processed into products by forging, rolling or extrusion.

[0027] In step 1, the molybdenum powder and titanium powder contained water before mixing, and the water content in the mixture of molybdenum powder and titanium powder was 5%.

[0028] In step 1, molybdenum powder and titanium powder are added to deionized water, the deionized water is heated to boiling, kept warm for 20 minutes, and after standing, excess water is removed while it is still hot, and the water content of molybdenum powder and titanium powder is controlled to 5%. The molybdenum powder and titanium powder are then quickly placed into a ball mill.

[0029] In step 1, when removing excess moisture from molybdenum powder and titanium powder, the temperature of the mixture should be kept above 80°C, and filtration should be used to remove excess moisture.

[0030] In step 1, the mass fraction of titanium powder in the mixture of molybdenum powder and titanium powder is 0.45%.

[0031] In step 1, before introducing inert gas into the ball mill, a vacuum process is performed. After ball milling, the ball milling endpoint is reached when no water vapor is detected at the gas outlet. The ball milling temperature is 60-80℃.

[0032] The inert gas in step 1 is nitrogen, and the inert gas in step 2 is helium.

[0033] In step 2, the pressure for pressure molding is 150 MPa.

[0034] In step 4, when the dense alloy block is processed into a product, the deformation is controlled within 40%.

[0035] In step 4, after obtaining the product, it undergoes annealing treatment.

[0036] In Example 2, a method for preparing a molybdenum-titanium alloy material includes the following steps:

[0037] Step 1: Use a ball mill to thoroughly mix molybdenum powder and titanium powder under inert gas protection;

[0038] Step 2: The mixed powder is pressed and molded into a billet;

[0039] Step 3: The billet is heated and sintered under inert gas protection at a temperature of 1600℃ for 2 hours to form a dense alloy block.

[0040] Step 4: The sintered dense alloy block is processed into products by forging, rolling or extrusion.

[0041] In step 1, the molybdenum powder and titanium powder contained water before mixing, and the water content of the mixture of molybdenum powder and titanium powder was 30%.

[0042] In step 1, molybdenum powder and titanium powder are added to deionized water, the deionized water is heated to boiling, kept warm for 30 minutes, and after standing, excess water is removed while it is still hot, and the water content of molybdenum powder and titanium powder is controlled to 30%. The molybdenum powder and titanium powder are then quickly placed into a ball mill.

[0043] In step 1, when removing excess moisture from molybdenum powder and titanium powder, the temperature of the mixture should be kept above 80°C. Excess moisture can be removed by filtration, centrifugation, or pouring.

[0044] In step 1, the mass fraction of titanium powder in the mixture of molybdenum powder and titanium powder is 0.55%.

[0045] In step 1, before introducing inert gas into the ball mill, a vacuum process is performed. After ball milling, the ball milling endpoint is reached when no water vapor is detected at the gas outlet. The ball milling temperature is 60-80℃.

[0046] The inert gas in step 1 is helium, and the inert gas in step 2 is helium.

[0047] In step 2, the pressure for pressure molding is 400 MPa.

[0048] In step 4, when processing the dense alloy block into a product, the deformation is controlled at 80%.

[0049] In step 4, after obtaining the product, it undergoes annealing treatment.

[0050] Example 3 describes a method for preparing a molybdenum-titanium alloy material, comprising the following steps:

[0051] Step 1: Use a ball mill to thoroughly mix molybdenum powder and titanium powder under inert gas protection;

[0052] Step 2: The mixed powder is pressed and molded into a billet;

[0053] Step 3: The billet is heated and sintered under inert gas protection at a temperature of 1400℃ for 6 hours to form a dense alloy block.

[0054] Step 4: The sintered dense alloy block is processed into products by forging, rolling or extrusion.

[0055] In step 1, the molybdenum powder and titanium powder contained water before mixing, and the water content in the mixture of molybdenum powder and titanium powder was 15%.

[0056] In step 1, molybdenum powder and titanium powder are added to deionized water, the deionized water is heated to boiling, kept warm for 25 minutes, and after standing, excess water is removed while it is still hot, and the water content of molybdenum powder and titanium powder is controlled to 15%. The molybdenum powder and titanium powder are then quickly placed into a ball mill.

[0057] In step 1, when removing excess moisture from molybdenum powder and titanium powder, the temperature of the mixture should be kept above 80°C. Excess moisture can be removed by filtration, centrifugation, or pouring.

[0058] In step 1, the mass fraction of titanium powder in the mixture of molybdenum powder and titanium powder is 0.5%.

[0059] In step 1, before introducing inert gas into the ball mill, a vacuum process is performed. After ball milling, the ball milling endpoint is reached when no water vapor is detected at the gas outlet. The ball milling temperature is 70℃.

[0060] The inert gas in step 1 is neon, and the inert gas in step 2 is neon.

[0061] In step 2, the pressure for pressure molding is 300 MPa.

[0062] In step 4, when the dense alloy block is processed into a product, the deformation is controlled at 60%.

[0063] In step 4, after obtaining the product, it undergoes annealing treatment.

[0064] In Example 4, a method for preparing a molybdenum-titanium alloy material includes the following steps:

[0065] Step 1: Use a ball mill to thoroughly mix molybdenum powder, titanium powder, and carbon powder under inert gas protection;

[0066] Step 2: The mixed powder is pressed and molded into a billet;

[0067] Step 3: The billet is heated and sintered under inert gas protection at a temperature of 1400℃ for 6 hours to form a dense alloy block.

[0068] Step 4: The sintered dense alloy block is processed into products by forging, rolling or extrusion.

[0069] In step 1, the molybdenum powder, titanium powder and carbon powder contained water before mixing, and the water content in the mixture of molybdenum powder, titanium powder and carbon powder was 15%.

[0070] In step 1, molybdenum powder, titanium powder and carbon powder are added to deionized water, the deionized water is heated to boiling, kept warm for 25 minutes, and after standing, excess water is removed while it is still hot, and the water content of molybdenum powder and titanium powder is controlled to 15%. The molybdenum powder and titanium powder are then quickly placed into a ball mill.

[0071] In step 1, when removing excess moisture from molybdenum powder, titanium powder, and carbon powder, the temperature of the mixture should be kept above 80°C. Excess moisture can be removed by filtration, centrifugation, or pouring.

[0072] In step 1, the mass fraction of titanium powder in the mixture of molybdenum powder, titanium powder and carbon powder is 0.5% and the mass fraction of carbon powder is 0.02%.

[0073] In step 1, before introducing inert gas into the ball mill, a vacuum process is performed. After ball milling, the ball milling endpoint is reached when no water vapor is detected at the gas outlet. The ball milling temperature is 70℃.

[0074] The inert gas in step 1 is argon, and the inert gas in step 2 is argon.

[0075] In step 2, the pressure for pressure molding is 300 MPa.

[0076] In step 4, when the dense alloy block is processed into a product, the deformation is controlled at 60%.

[0077] In step 4, after obtaining the product, it undergoes annealing treatment.

[0078] The above-mentioned molybdenum-titanium alloy materials are used in the field of target materials.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for preparing a molybdenum-titanium alloy material, characterized in that, Includes the following steps: Step 1: Use a ball mill to thoroughly mix molybdenum powder and titanium powder under inert gas protection; Step 2: The mixed powder is pressed and molded into a billet; Step 3: The billet is heated and sintered under inert gas protection at a temperature of 1200-1600℃ for 2-12 hours to form a dense alloy block. Step 4: The sintered dense alloy block is processed into products by forging, rolling or extrusion. In step 1, the molybdenum powder and titanium powder contain water before mixing, and the water content in the mixture of molybdenum powder and titanium powder is 5%-30%.

2. The method for preparing a molybdenum-titanium alloy material according to claim 1, characterized in that, In step 1, molybdenum powder and titanium powder are added to deionized water, the deionized water is heated to boiling, kept warm for 20-30 minutes, and after standing, excess water is removed while it is still hot, and the water content of molybdenum powder and titanium powder is controlled to 5%-30%. The molybdenum powder and titanium powder are then quickly placed into a ball mill.

3. The method for preparing a molybdenum-titanium alloy material according to claim 2, characterized in that, In step 1, when removing excess moisture from molybdenum powder and titanium powder, the temperature of the mixture should be kept above 80°C. The excess moisture can be removed by filtration, centrifugation, or pouring.

4. The method for preparing a molybdenum-titanium alloy material according to claim 3, characterized in that, In step 1, the mass fraction of titanium powder in the mixture of molybdenum powder and titanium powder is 0.45%-0.55%.

5. The method for preparing a molybdenum-titanium alloy material according to claim 4, characterized in that, In step 1, before the inert gas is introduced into the ball mill, a vacuum treatment is performed. After ball milling, the ball milling end point is when no water vapor is detected at the gas outlet. The ball milling temperature is 60-80℃.

6. The method for preparing a molybdenum-titanium alloy material according to claim 1, characterized in that, The inert gas in step 1 is one of nitrogen, helium, neon, and argon, and the inert gas in step 2 is one of helium, neon, and argon.

7. The method for preparing a molybdenum-titanium alloy material according to claim 1, characterized in that, In step 2, the pressure for pressurization is 150-400 MPa.

8. The method for preparing a molybdenum-titanium alloy material according to claim 1, characterized in that, In step 4, when the dense alloy block is processed into a product, the deformation is controlled within 40%–80%.

9. The method for preparing a molybdenum-titanium alloy material according to claim 1, characterized in that, In step 4, after obtaining the product, the product is subjected to annealing treatment.

10. The application of the molybdenum-titanium alloy material according to any one of claims 1-9 in the field of target materials.