High-density tungsten alloy binder for 3D printing and preparation method of high-density tungsten alloy binder

Abstract

The invention discloses a high-density tungsten alloy binder for 3D printing. The high-density tungsten alloy binder comprises the following raw materials in parts by weight: 15-20 parts of modified burnt talcum powder, 13-15 parts of paraffin, 12-15 parts of stearic acid, 5-10 parts of polyethylene vinyl acetate and 2-5 parts of high-density polyethylene. According to the tungsten alloy binder, the paraffin, the stearic acid, the polyethylene vinyl acetate and the high-density polyethylene are blended and matched, meanwhile, the modified burnt talcum powder is added and blended into a system, the forming quality of an alloy product in the degreasing process of the product is optimized, and the high temperature resistance and the corrosion resistance of the product are improved.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and more specifically to a high-density tungsten alloy binder for 3D printing and its preparation method. Background Technology

[0002] 3D printing technology, with its advantages of rapid prototyping and customization, has been widely used in aerospace, defense, and medical device industries. High-density tungsten alloys, due to their high specific gravity, good mechanical properties, excellent corrosion resistance, and shielding performance, have become one of the most promising materials in the 3D printing field. However, in the process of 3D printing high-density tungsten alloys, the binder plays a crucial role, directly affecting the molding quality, mechanical properties, and subsequent debinding and sintering effects of the printed parts.

[0003] Existing adhesives have poor stability, poor high-temperature resistance and corrosion resistance, and affect the forming quality of alloy products during degreasing. Therefore, this invention further improves them. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a high-density tungsten alloy binder for 3D printing and its preparation method, thereby solving the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution: This invention provides a high-density tungsten alloy binder for 3D printing, comprising the following raw materials in parts by weight: 15-20 parts modified calcined talc, 13-15 parts paraffin wax, 12-15 parts stearic acid, 5-10 parts vinyl acetate, and 2-5 parts high-density polyethylene.

[0006] Preferably, the tungsten alloy binder comprises the following raw materials in parts by weight: 17.5 parts modified calcined talc, 14 parts paraffin, 13.5 parts stearic acid, 7.5 parts vinyl acetate, and 3.5 parts high-density polyethylene.

[0007] Preferably, the high-density polyethylene has a density of 0.94-0.976 g / cm3 and a melting temperature of 150-250°C; the ethylene-vinyl acetate (7340M) is sourced from Plastics Industry Co., Ltd.

[0008] Preferably, the modified calcined talc powder is prepared by: S1: The preparation method of the second modified liquid is as follows: Yttrium nitrate solution, 5% sodium dodecylbenzenesulfonate solution and lanthanum oxide were mixed evenly in a weight ratio of 2:5:1 to obtain yttrium nitrate solution; Add 3-5 parts of nano mica powder and 1-3 parts of silicon carbide to 5-8 parts of yttrium nitrate solution and stir evenly to obtain the second modified solution; S2: Add the first modified liquid to the second modified liquid at a weight ratio of 3:5 and perform ultrasonic modification. After ultrasonic treatment, the modified liquid is obtained. S3: The calcined talc is preheated at 55-60℃ for 1 hour. The preheated calcined talc is added to the modification liquid and stirred for modification. After stirring, the mixture is filtered and dried to obtain modified calcined talc powder.

[0009] Preferably, the mass fraction of the yttrium nitrate solution is 2-4%; the ultrasonic power for ultrasonic modification is 350-400W, and the ultrasonic treatment lasts for 1 hour.

[0010] Preferably, the preheated calcined talc and the modified liquid are in a weight ratio of 5:(8-9).

[0011] Preferably, the stirring speed for the stirring modification treatment is 450-500 r / min, and the stirring time is 2 h.

[0012] Preferably, the preparation method of the first modified liquid is as follows: S11: Add 3-5 parts of aluminosilicate fiber and 1-2 parts of silane coupling agent KH550 to 5-8 parts of chitosan solution and stir evenly to obtain fiber solution; S12: Irradiate boron nitride in a proton irradiation chamber for 1 hour at an irradiation power of 350-400W. After irradiation, irradiated boron nitride is obtained. The irradiated boron nitride and fiber liquid are stirred evenly at a weight ratio of 3:5 to obtain the first modified liquid.

[0013] Preferably, the chitosan solution has a mass fraction of 2-5%.

[0014] The present invention also provides a method for preparing a high-density tungsten alloy binder for 3D printing, comprising the following steps: weighing raw materials according to the weight parts, mixing the raw materials thoroughly, and obtaining the tungsten alloy binder.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention relates to a tungsten alloy binder that uses paraffin wax, stearic acid, and polyvinyl acetate in combination with high-density polyethylene. Modified calcined talc powder is also added to the system to optimize the molding quality of the alloy product during degreasing and improve its high-temperature resistance and corrosion resistance. The modified calcined talc powder is obtained by preheating calcined talc and then modifying it with a modifying liquid. The first and second modifying liquids are blended together. Simultaneously, the aluminum silicate fiber in the first modifying liquid is combined with chitosan solution to form a fiber liquid, which is then irradiated with boron nitride to activate its activity. This fiber liquid is then blended to form the first modified liquid. Through the coordinated combination of raw materials, the performance of the product is optimized and improved. Furthermore, the nano-mica powder and silicon carbide in the second modifying liquid are blended with yttrium nitrate solution. Through the synergistic effect of the raw materials, the functionality of the modified calcined talc powder in the system is enhanced. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] This embodiment provides a high-density tungsten alloy binder for 3D printing, comprising the following raw materials in parts by weight: 15-20 parts modified calcined talc, 13-15 parts paraffin wax, 12-15 parts stearic acid, 5-10 parts vinyl acetate, and 2-5 parts high-density polyethylene.

[0018] The tungsten alloy binder in this embodiment consists of the following raw materials in parts by weight: 17.5 parts modified calcined talc, 14 parts paraffin, 13.5 parts stearic acid, 7.5 parts vinyl acetate, and 3.5 parts high-density polyethylene.

[0019] The high-density polyethylene in this embodiment has a density of 0.94-0.976 g / cm3 and a melting temperature of 150-250°C; the ethylene-vinyl acetate (7340M) is sourced from Plastics Industry Co., Ltd.

[0020] The preparation method of the modified calcined talc powder in this embodiment is as follows: S1: The preparation method of the second modified liquid is as follows: Yttrium nitrate solution, 5% sodium dodecylbenzenesulfonate solution and lanthanum oxide were mixed evenly in a weight ratio of 2:5:1 to obtain yttrium nitrate solution; Add 3-5 parts of nano mica powder and 1-3 parts of silicon carbide to 5-8 parts of yttrium nitrate solution and stir evenly to obtain the second modified solution; S2: Add the first modified liquid to the second modified liquid at a weight ratio of 3:5 and perform ultrasonic modification. After ultrasonic treatment, the modified liquid is obtained. S3: The calcined talc is preheated at 55-60℃ for 1 hour. The preheated calcined talc is added to the modification liquid and stirred for modification. After stirring, the mixture is filtered and dried to obtain modified calcined talc powder.

[0021] In this embodiment, the mass fraction of the yttrium nitrate solution is 2-4%; the ultrasonic power for ultrasonic modification is 350-400W, and the ultrasonic treatment lasts for 1 hour.

[0022] In this embodiment, the preheated calcined talc and modified liquid are prepared in a weight ratio of 5:(8-9).

[0023] In this embodiment, the stirring speed for the stirring modification treatment is 450-500 r / min, and the stirring time is 2 h.

[0024] The preparation method of the first modified liquid in this embodiment is as follows: S11: Add 3-5 parts of aluminosilicate fiber and 1-2 parts of silane coupling agent KH550 to 5-8 parts of chitosan solution and stir evenly to obtain fiber solution; S12: Irradiate boron nitride in a proton irradiation chamber for 1 hour at an irradiation power of 350-400W. After irradiation, irradiated boron nitride is obtained. The irradiated boron nitride and fiber liquid are stirred evenly at a weight ratio of 3:5 to obtain the first modified liquid.

[0025] The chitosan solution in this embodiment has a mass fraction of 2-5%.

[0026] This embodiment provides a method for preparing a high-density tungsten alloy binder for 3D printing, comprising the following steps: weighing raw materials according to weight parts, mixing the raw materials thoroughly, and obtaining the tungsten alloy binder.

[0027] Example 1 This embodiment provides a high-density tungsten alloy binder for 3D printing, comprising the following raw materials in parts by weight: 15 parts modified calcined talc, 13 parts paraffin wax, 12 parts stearic acid, 5 parts vinyl acetate, and 2 parts high-density polyethylene.

[0028] The high-density polyethylene in this embodiment has a density of 0.94 g / cm3 and a melting temperature of 150°C; the ethylene-vinyl acetate (7340M) is sourced from Plastics Industry Co., Ltd.

[0029] The preparation method of the modified calcined talc powder in this embodiment is as follows: S1: The preparation method of the second modified liquid is as follows: Yttrium nitrate solution, 5% sodium dodecylbenzenesulfonate solution and lanthanum oxide were mixed evenly in a weight ratio of 2:5:1 to obtain yttrium nitrate solution; Three parts of nano-mica powder and one part of silicon carbide were added to five parts of yttrium nitrate solution and stirred evenly to obtain the second modified solution; S2: Add the first modified liquid to the second modified liquid at a weight ratio of 3:5 and perform ultrasonic modification. After ultrasonic treatment, the modified liquid is obtained. S3: The calcined talc is preheated at 55℃ for 1 hour. The preheated calcined talc is added to the modification liquid and stirred for modification. After stirring, the mixture is filtered and dried to obtain modified calcined talc powder.

[0030] In this embodiment, the mass fraction of the yttrium nitrate solution is 2%; the ultrasonic power for ultrasonic modification is 350W, and the ultrasonic treatment lasts for 1 hour.

[0031] In this embodiment, the preheated calcined talc and modified liquid are prepared in a weight ratio of 5:8.

[0032] In this embodiment, the stirring speed for the stirring modification treatment is 450 r / min, and the stirring time is 2 h.

[0033] The preparation method of the first modified liquid in this embodiment is as follows: S11: Add 3 parts of aluminum silicate fiber and 1 part of silane coupling agent KH550 to 5 parts of chitosan solution and stir evenly to obtain fiber liquid; S12: Irradiate boron nitride in a proton irradiation chamber for 1 hour at an irradiation power of 350W. After irradiation, irradiated boron nitride is obtained. The irradiated boron nitride and fiber liquid are stirred evenly at a weight ratio of 3:5 to obtain the first modified liquid.

[0034] The chitosan solution in this embodiment has a mass fraction of 2%.

[0035] This embodiment provides a method for preparing a high-density tungsten alloy binder for 3D printing, comprising the following steps: weighing raw materials according to weight parts, mixing the raw materials thoroughly, and obtaining the tungsten alloy binder.

[0036] Example 2 This embodiment provides a high-density tungsten alloy binder for 3D printing, comprising the following raw materials in parts by weight: 20 parts modified calcined talc, 15 parts paraffin wax, 15 parts stearic acid, 10 parts vinyl acetate, and 5 parts high-density polyethylene.

[0037] The high-density polyethylene in this embodiment has a density of 0.976 g / cm3 and a melting temperature of 250°C; the ethylene-vinyl acetate (7340M) is sourced from Plastics Industry Co., Ltd.

[0038] The preparation method of the modified calcined talc powder in this embodiment is as follows: S1: The preparation method of the second modified liquid is as follows: Yttrium nitrate solution, 5% sodium dodecylbenzenesulfonate solution and lanthanum oxide were mixed evenly in a weight ratio of 2:5:1 to obtain yttrium nitrate solution; Five parts of nano-mica powder and three parts of silicon carbide were added to eight parts of yttrium nitrate solution and stirred evenly to obtain the second modified solution; S2: Add the first modified liquid to the second modified liquid at a weight ratio of 3:5 and perform ultrasonic modification. After ultrasonic treatment, the modified liquid is obtained. S3: The calcined talc is preheated at 60℃ for 1 hour. The preheated calcined talc is added to the modification liquid and stirred for modification. After stirring, the mixture is filtered and dried to obtain modified calcined talc powder.

[0039] In this embodiment, the mass fraction of the yttrium nitrate solution is 4%; the ultrasonic power for ultrasonic modification is 400W, and the ultrasonic treatment lasts for 1 hour.

[0040] In this embodiment, the preheated calcined talc and modified liquid are prepared in a weight ratio of 5:9.

[0041] In this embodiment, the stirring speed for the stirring modification treatment is 500 r / min, and the stirring time is 2 h.

[0042] The preparation method of the first modified liquid in this embodiment is as follows: S11: Add 5 parts of aluminum silicate fiber and 2 parts of silane coupling agent KH550 to 8 parts of chitosan solution and stir evenly to obtain fiber liquid; S12: Irradiate boron nitride in a proton irradiation chamber for 1 hour at an irradiation power of 400W. After irradiation, irradiated boron nitride is obtained. The irradiated boron nitride and fiber liquid are stirred evenly at a weight ratio of 3:5 to obtain the first modified liquid.

[0043] The chitosan solution in this embodiment has a mass fraction of 5%.

[0044] This embodiment provides a method for preparing a high-density tungsten alloy binder for 3D printing, comprising the following steps: weighing raw materials according to weight parts, mixing the raw materials thoroughly, and obtaining the tungsten alloy binder.

[0045] Example 3 This embodiment provides a high-density tungsten alloy binder for 3D printing, comprising the following raw materials in parts by weight: 17.5 parts modified calcined talc, 14 parts paraffin, 13.5 parts stearic acid, 7.5 parts vinyl acetate, and 3.5 parts high-density polyethylene.

[0046] The high-density polyethylene in this embodiment has a density of 0.95 g / cm3 and a melting temperature of 200°C; the ethylene-vinyl acetate (7340M) is sourced from Plastics Industry Co., Ltd.

[0047] The preparation method of the modified calcined talc powder in this embodiment is as follows: S1: The preparation method of the second modified liquid is as follows: Yttrium nitrate solution, 5% sodium dodecylbenzenesulfonate solution and lanthanum oxide were mixed evenly in a weight ratio of 2:5:1 to obtain yttrium nitrate solution; Four parts of nano-mica powder and two parts of silicon carbide were added to 6.5 parts of yttrium nitrate solution and stirred evenly to obtain the second modified solution; S2: Add the first modified liquid to the second modified liquid at a weight ratio of 3:5 and perform ultrasonic modification. After ultrasonic treatment, the modified liquid is obtained. S3: The calcined talc is preheated at 57.5℃ for 1 hour. The preheated calcined talc is added to the modification liquid and stirred for modification. After stirring, the mixture is filtered and dried to obtain modified calcined talc powder.

[0048] In this embodiment, the mass fraction of the yttrium nitrate solution is 3%; the ultrasonic power for ultrasonic modification is 375W, and the ultrasonic treatment lasts for 1 hour.

[0049] In this embodiment, the preheated calcined talc and modified liquid are prepared in a weight ratio of 5:8.5.

[0050] In this embodiment, the stirring speed for the stirring modification treatment was 470 r / min, and the stirring time was 2 h.

[0051] The preparation method of the first modified liquid in this embodiment is as follows: S11: Add 4 parts of aluminosilicate fiber and 1.5 parts of silane coupling agent KH550 to 6.5 parts of chitosan solution and stir evenly to obtain fiber solution; S12: Irradiate boron nitride in a proton irradiation chamber for 1 hour at an irradiation power of 375W. After irradiation, irradiated boron nitride is obtained. The irradiated boron nitride and fiber liquid are stirred evenly at a weight ratio of 3:5 to obtain the first modified liquid.

[0052] The chitosan solution in this embodiment has a mass fraction of 3.5%.

[0053] This embodiment provides a method for preparing a high-density tungsten alloy binder for 3D printing, comprising the following steps: weighing raw materials according to weight parts, mixing the raw materials thoroughly, and obtaining the tungsten alloy binder.

[0054] Comparative Example 1. Unlike Example 3, no modified calcined talc was added.

[0055] Comparative Example 2. Unlike Example 3, no modifying liquid was added during the preparation of the modified calcined talc powder.

[0056] Comparative Example 3. Unlike Example 3, the first modified liquid was not added to the modified liquid.

[0057] Comparative Example 4. Unlike Example 3, no fiber liquid was added to the first modified liquid.

[0058] Comparative Example 5. Unlike Example 3, no second modifying liquid was added to the modified liquid.

[0059] Comparative Example 6. Unlike Example 3, the second modified liquid did not contain nano-mica powder or silicon carbide.

[0060] The products of Examples 1-3 and Comparative Examples 1-6 were added to tungsten alloy powder at a weight ratio of 1:20, and sintered and demolded using conventional processes. The performance tests are as follows:

[0061] As can be seen from Examples 1-3 and Comparative Examples 1-6, the product of Example 3 of the present invention showed no deformation or cracking, and its corrosion resistance and heat resistance were significantly improved. The product did not contain modified calcined talc, and its performance deteriorated significantly. Furthermore, the product's performance deteriorated when the modified calcined talc was not prepared with the addition of a modifying liquid, the first modifying liquid, the fiber liquid, the second modifying liquid, or the nano-mica powder and silicon carbide. The modified calcined talc improved by the modifying liquid obtained by the specific method of the present invention showed the most significant performance improvement.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0063] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-density tungsten alloy binder for 3D printing, characterized in that, Including the following parts by weight of raw materials: 15-20 parts modified calcined talc, 13-15 parts paraffin wax, 12-15 parts stearic acid, 5-10 parts vinyl acetate, and 2-5 parts high-density polyethylene.

2. The high-density tungsten alloy binder for 3D printing according to claim 1, characterized in that, The tungsten alloy binder comprises the following raw materials in parts by weight: 17.5 parts modified calcined talc, 14 parts paraffin, 13.5 parts stearic acid, 7.5 parts vinyl acetate, and 3.5 parts high-density polyethylene.

3. The high-density tungsten alloy binder for 3D printing according to claim 1, characterized in that, The high-density polyethylene has a density of 0.94-0.976 g / cm3 and a melting temperature of 150-250°C; the ethylene-vinyl acetate (7340M) is sourced from Plastics Industry Co., Ltd.

4. The high-density tungsten alloy binder for 3D printing according to claim 1, characterized in that, The preparation method of the modified calcined talc powder is as follows: S1: The preparation method of the second modified liquid is as follows: Yttrium nitrate solution, 5% sodium dodecylbenzenesulfonate solution and lanthanum oxide were mixed evenly in a weight ratio of 2:5:1 to obtain yttrium nitrate solution; Add 3-5 parts of nano mica powder and 1-3 parts of silicon carbide to 5-8 parts of yttrium nitrate solution and stir evenly to obtain the second modified solution; S2: Add the first modified liquid to the second modified liquid at a weight ratio of 3:5 and perform ultrasonic modification. After ultrasonic treatment, the modified liquid is obtained. S3: The calcined talc is preheated at 55-60℃ for 1 hour. The preheated calcined talc is added to the modification liquid and stirred for modification. After stirring, the mixture is filtered and dried to obtain modified calcined talc powder.

5. The high-density tungsten alloy binder for 3D printing according to claim 4, characterized in that, The mass fraction of the yttrium nitrate solution is 2-4%; the ultrasonic power for ultrasonic modification is 350-400W, and the ultrasonic treatment lasts for 1 hour.

6. The high-density tungsten alloy binder for 3D printing according to claim 4, characterized in that, The preheated talc and modified liquid are prepared in a weight ratio of 5:(8-9).

7. The high-density tungsten alloy binder for 3D printing according to claim 4, characterized in that, The stirring speed for the stirring modification treatment is 450-500 r / min, and the stirring time is 2 h.

8. The high-density tungsten alloy binder for 3D printing according to claim 4, characterized in that, The preparation method of the first modified liquid is as follows: S11: Add 3-5 parts of aluminosilicate fiber and 1-2 parts of silane coupling agent KH550 to 5-8 parts of chitosan solution and stir evenly to obtain fiber solution; S12: Irradiate boron nitride in a proton irradiation chamber for 1 hour at an irradiation power of 350-400W. After irradiation, irradiated boron nitride is obtained. The irradiated boron nitride and fiber liquid are stirred evenly at a weight ratio of 3:5 to obtain the first modified liquid.

9. The high-density tungsten alloy binder for 3D printing according to claim 8, characterized in that, The chitosan solution has a mass fraction of 2-5%.

10. A method for preparing a high-density tungsten alloy binder for 3D printing as described in any one of claims 1-9, characterized in that, The process includes the following steps: weighing the raw materials according to their weight proportions, mixing the raw materials thoroughly, and obtaining a tungsten alloy binder.

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