Electric corrosion resistant tungsten alloy contact material and preparation method thereof

Abstract

The invention discloses an electric-corrosion-resistant tungsten alloy contact material. The electric-corrosion-resistant tungsten alloy contact material comprises tungsten powder, copper powder and an additive, wherein the substance mass ratio of the tungsten powder to the copper powder to the additive is (93-97): (4.9-2.1): (2.1-0.9). The tungsten alloy contact material is prepared by blending tungsten powder, copper powder and an additive, meanwhile, scandium-cerium continuous effect liquid in the additive and a titanium boride agent are subjected to stirring improvement treatment, and carbon nanotubes, zirconium oxide, a silane coupling agent KH550 and a dopamine hydrochloride solution in the continuous effect liquid are blended and matched; according to the titanium boride agent obtained by blending titanium boride with samarium chloride and graphene, through synergistic improvement and co-coordination of the raw materials, the obtained additive optimizes the ablation resistance, strength performance and hardness coordination of the product in a system, and the temperature change resistance stability effect of the product is remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of contact materials, and in particular to an electrical corrosion resistant tungsten alloy contact material and a preparation method thereof. Background Art

[0002] Contact materials, also known as electrical contact materials, are used in switches, relays, electrical connections, and electrical connectors. They are generally divided into two types: high-voltage contact materials and low-voltage contact materials. Existing contact materials have poor ablation resistance and mediocre strength and hardness. This makes it difficult to achieve a balanced balance of ablation resistance, strength, and hardness. Furthermore, these materials suffer from poor temperature stability, limiting their effectiveness. To address these issues, the present invention provides a tungsten alloy contact material. Summary of the Invention

[0003] In view of the defects of the prior art, the purpose of the present invention is to provide a tungsten alloy contact material and a preparation method thereof to solve the problems raised in the above background technology.

[0004] The present invention solves the technical problem by adopting the following technical solutions: The present invention provides an electro-corrosion-resistant tungsten alloy contact material, wherein the contact material comprises copper powder, tungsten powder and an additive, wherein the mass ratio of the tungsten powder, the copper powder and the additive is (93-97): (4.9-2.1): (2.1-0.9).

[0005] Preferably, the mass ratio of the tungsten powder, copper powder and additive is 95:3.5:1.5.

[0006] Preferably, the preparation method of the additive is: S1: Scandium powder and cerium powder are mixed in a weight ratio of 3:2, and then added to a continuous effect liquid that is 3-5 times the total amount of scandium powder for ultrasonic treatment. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain a scandium-cerium continuous effect liquid; The preparation method of the continuous effect liquid is as follows: 2-4 parts of carbon nanotubes, 3-5 parts of zirconium oxide, 1-2 parts of silane coupling agent KH550 and 5-8 parts of dopamine hydrochloride solution are uniformly mixed to obtain a continuous effect solution; S2: adding titanium boride into the scandium-cerium continuous effect solution in a weight ratio of 4:7 and stirring; after stirring, filtering and drying to obtain the additive.

[0007] Preferably, the ultrasonic power of the ultrasonic treatment is 350-400W, and the ultrasonic treatment is performed for 1 hour; the stirring speed of the stirring treatment is 550-750 r / min, and the stirring is performed for 20 minutes.

[0008] Preferably, the outer diameter of the carbon nanotubes is 10-20 nm and the length is 3-5 μm.

[0009] Preferably, the mass fraction of the dopamine hydrochloride solution is 3-5%.

[0010] Preferably, the preparation method of the titanium boride agent is: Preheat titanium boride at 55-60° C. for 1 hour. After the preheating is completed, preheated titanium boride is obtained. 5-8 parts of the preheated titanium boride, 2-4 parts of samarium chloride and 1-3 parts of graphene are fully mixed, and then sintered. After the sintering is completed, a titanium boride agent is obtained.

[0011] Preferably, the sintering temperature of the sintering treatment is 210-230° C., and the sintering time is 2 hours.

[0012] The present invention also provides a method for preparing an electro-corrosion resistant tungsten alloy contact material, comprising the following steps: Tungsten powder, copper powder and additives are fully mixed, then molded in a mold, and then infiltrated with copper and sintered to obtain tungsten alloy contact material.

[0013] Preferably, the compression molding process has a compression pressure of 35-40 MPa and a compression time of 1 hour; and the infiltration sintering process has a sintering temperature of 1200-1250° C. and a sintering time of 2 hours.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The tungsten alloy contact material of the present invention is prepared by blending tungsten powder, copper powder and additives. At the same time, the scandium-cerium continuous effect liquid in the additive is blended with the titanium boride agent and stirred for improvement. The carbon nanotubes, zirconium oxide and silane coupling agent KH550 and dopamine hydrochloride solution in the continuous effect liquid are blended and coordinated. At the same time, samarium chloride and graphene are blended with titanium boride to obtain the titanium boride agent. Through the synergistic improvement and coordination between the raw materials, the obtained additives optimize the ablation resistance, strength performance and hardness of the product in the system, and have a significant effect on the temperature change stability of the product. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] The present embodiment provides an electro-corrosion-resistant tungsten alloy contact material, comprising tungsten powder, copper powder, and additives, wherein the mass ratio of the tungsten powder, copper powder, and additives is (93-97): (4.9-2.1): (2.1-0.9).

[0017] Preferably, the mass ratio of the tungsten powder, copper powder and additive is 95:3.5:1.5.

[0018] The preparation method of the additive of this embodiment is: S1: Scandium powder and cerium powder are mixed in a weight ratio of 3:2, and then added to a continuous effect liquid that is 3-5 times the total amount of scandium powder for ultrasonic treatment. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain a scandium-cerium continuous effect liquid; The preparation method of the continuous effect liquid is as follows: 2-4 parts of carbon nanotubes, 3-5 parts of zirconium oxide, 1-2 parts of silane coupling agent KH550 and 5-8 parts of dopamine hydrochloride solution are uniformly mixed to obtain a continuous effect solution; S2: adding titanium boride into the scandium-cerium continuous effect solution in a weight ratio of 4:7 and stirring; after stirring, filtering and drying to obtain the additive.

[0019] The ultrasonic power of the ultrasonic treatment in this embodiment is 350-400W, and the ultrasonic treatment is performed for 1 hour; the stirring speed of the stirring treatment is 550-750 r / min, and the stirring is performed for 20 minutes.

[0020] The carbon nanotubes in this embodiment have an outer diameter of 10-20 nm and a length of 3-5 μm.

[0021] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3-5%.

[0022] The preparation method of the titanium boride agent of this embodiment is: Preheat titanium boride at 55-60° C. for 1 hour. After the preheating is completed, preheated titanium boride is obtained. 5-8 parts of the preheated titanium boride, 2-4 parts of samarium chloride and 1-3 parts of graphene are fully mixed, and then sintered. After the sintering is completed, a titanium boride agent is obtained.

[0023] The sintering temperature of the sintering process in this embodiment is 210-230° C., and the sintering time is 2 hours.

[0024] The method for preparing a tungsten alloy contact material resistant to electrical corrosion in this embodiment includes the following steps: Tungsten powder, copper powder and additives are fully mixed, then molded in a mold, and then infiltrated with copper and sintered to obtain tungsten alloy contact material.

[0025] In this embodiment, the compression molding has a compression pressure of 35-40 MPa and a compression time of 1 hour; the infiltration sintering has a sintering temperature of 1200-1250° C. and a sintering time of 2 hours.

[0026] Example 1. The present embodiment provides an electro-corrosion resistant tungsten alloy contact material, comprising tungsten powder, copper powder, and additives, wherein the mass ratio of the tungsten powder, copper powder, and additives is 93:4.9:2.1.

[0027] The preparation method of the additive of this embodiment is: S1: Scandium powder and cerium powder are mixed in a weight ratio of 3:2, and then added to a continuous effect solution that is 3 times the total amount of scandium powder for ultrasonic treatment. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain a scandium-cerium continuous effect solution; The preparation method of the continuous effect liquid is as follows: 2 parts of carbon nanotubes, 3 parts of zirconium oxide, 1 part of silane coupling agent KH550 and 5 parts of dopamine hydrochloride solution were evenly mixed to obtain a continuous effect solution; S2: adding titanium boride into the scandium-cerium continuous effect solution in a weight ratio of 4:7 and stirring; after stirring, filtering and drying to obtain the additive.

[0028] The ultrasonic treatment in this embodiment has an ultrasonic power of 350 W and an ultrasonic treatment time of 1 hour. The stirring treatment has a stirring speed of 550 r / min and an stirring time of 20 minutes.

[0029] The carbon nanotubes in this embodiment have an outer diameter of 10 nm and a length of 3 μm.

[0030] The mass fraction of the dopamine hydrochloride solution in this embodiment is 3%.

[0031] The preparation method of the titanium boride agent of this embodiment is: Titanium boride was preheated at 55° C. for 1 hour. After the preheating was completed, preheated titanium boride was obtained. 5 parts of the preheated titanium boride, 2 parts of samarium chloride and 1 part of graphene were fully mixed, and then sintered. After the sintering was completed, a titanium boride agent was obtained.

[0032] The sintering temperature of the sintering process in this embodiment is 210° C. and the sintering time is 2 hours.

[0033] The method for preparing a tungsten alloy contact material resistant to electrical corrosion in this embodiment includes the following steps: Copper powder, tungsten powder and additives are fully mixed, then molded in a mold, and then infiltrated and sintered to obtain tungsten alloy contact material.

[0034] The compression molding of this embodiment has a compression pressure of 35 MPa and a duration of 1 hour; the infiltration sintering has a sintering temperature of 1200° C. and a duration of 2 hours.

[0035] Example 2. The present embodiment provides an electro-corrosion resistant tungsten alloy contact material, comprising tungsten powder, copper powder, and additives, wherein the mass ratio of the tungsten powder, copper powder, and additives is 97:2.1:0.9.

[0036] The preparation method of the additive of this embodiment is: S1: Scandium powder and cerium powder are mixed in a weight ratio of 3:2, and then added to a continuous effect liquid with a volume of 5 times the total amount of scandium powder for ultrasonic treatment. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain a scandium-cerium continuous effect liquid; The preparation method of the continuous effect liquid is as follows: 4 parts of carbon nanotubes, 5 parts of zirconium oxide, 2 parts of silane coupling agent KH550 and 8 parts of dopamine hydrochloride solution were evenly mixed to obtain a continuous effect solution; S2: adding titanium boride into the scandium-cerium continuous effect solution in a weight ratio of 4:7 and stirring; after stirring, filtering and drying to obtain the additive.

[0037] The ultrasonic treatment in this embodiment has an ultrasonic power of 400 W and an ultrasonic treatment time of 1 hour. The stirring treatment has a stirring speed of 750 r / min and a stirring time of 20 minutes.

[0038] The carbon nanotubes in this embodiment have an outer diameter of 20 nm and a length of 5 μm.

[0039] The mass fraction of the dopamine hydrochloride solution in this embodiment is 5%.

[0040] The preparation method of the titanium boride agent of this embodiment is: Titanium boride was preheated at 60° C. for 1 hour. After the preheating was completed, preheated titanium boride was obtained. 8 parts of the preheated titanium boride, 4 parts of samarium chloride and 3 parts of graphene were fully mixed, and then sintered. After the sintering was completed, a titanium boride agent was obtained.

[0041] The sintering temperature of the sintering process in this embodiment is 230° C. and the sintering time is 2 hours.

[0042] The method for preparing a tungsten alloy contact material resistant to electrical corrosion in this embodiment includes the following steps: Tungsten powder, copper powder and additives are fully mixed, then molded in a mold, and then infiltrated with copper and sintered to obtain tungsten alloy contact material.

[0043] The compression molding of this embodiment has a compression pressure of 40 MPa and a duration of 1 hour; the infiltration sintering has a sintering temperature of 1250° C. and a duration of 2 hours.

[0044] Example 3. The present embodiment provides an electro-corrosion resistant tungsten alloy contact material, which includes tungsten powder, copper powder, and additives. The mass ratio of the tungsten powder, copper powder, and additives is 95:3.5:1.5.

[0045] The preparation method of the additive of this embodiment is: S1: Scandium powder and cerium powder are mixed in a weight ratio of 3:2, and then added to a continuous effect liquid of 4 times the total amount of scandium powder for ultrasonic treatment. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain a scandium-cerium continuous effect liquid; The preparation method of the continuous effect liquid is as follows: 3 parts of carbon nanotubes, 4 parts of zirconium oxide, 1.5 parts of silane coupling agent KH550 and 6.5 parts of dopamine hydrochloride solution were uniformly mixed to obtain a continuous effect solution; S2: adding titanium boride into the scandium-cerium continuous effect solution in a weight ratio of 4:7 and stirring; after stirring, filtering and drying to obtain the additive.

[0046] The ultrasonic treatment in this embodiment has an ultrasonic power of 375 W and an ultrasonic treatment time of 1 hour. The stirring treatment has a stirring speed of 600 r / min and a stirring time of 20 minutes.

[0047] The carbon nanotubes in this embodiment have an outer diameter of 15 nm and a length of 4 μm.

[0048] The mass fraction of the dopamine hydrochloride solution in this embodiment is 4%.

[0049] The preparation method of the titanium boride agent of this embodiment is: Titanium boride was preheated at 57.5° C. for 1 hour. After the preheating was completed, preheated titanium boride was obtained. 6.5 parts of the preheated titanium boride, 3 parts of samarium chloride and 2 parts of graphene were fully mixed, and then sintered. After the sintering was completed, a titanium boride agent was obtained.

[0050] The sintering temperature of the sintering process in this embodiment is 220° C. and the sintering time is 2 hours.

[0051] The method for preparing a tungsten alloy contact material resistant to electrical corrosion in this embodiment includes the following steps: Tungsten powder, copper powder and additives are fully mixed, then molded in a mold, and then infiltrated with copper and sintered to obtain tungsten alloy contact material.

[0052] The compression molding of this embodiment has a compression pressure of 37.5 MPa and a compression time of 1 hour; the infiltration sintering has a sintering temperature of 1225° C. and a sintering time of 2 hours.

[0053] Comparative Example 1. The difference from Example 3 is that no additives were added.

[0054] Comparative Example 2. The difference from Example 3 is that no continuous effect liquid is added during the preparation of the additive.

[0055] Comparative Example 3. The difference from Example 3 is that no carbon nanotubes or zirconium oxide is added to the continuous effect solution.

[0056] Comparative Example 4. The difference from Example 3 is that no titanium boride agent is added.

[0057] Comparative Example 5. The difference from Example 3 is that samarium chloride and graphene are not added in the preparation of the titanium boride agent.

[0058] The product performance tests of Examples 1-3 and Comparative Examples 1-5 are as follows:

[0059] From the tests of Examples 1-3 and Comparative Examples 1-5, the hardness, bending strength and ablation resistance of the product of Example 3 of the present invention are improved in a coordinated manner, and the product has a significant effect on temperature stability. When no additives are added to the product, the performance of the product deteriorates significantly. When no continuous-effect liquid is added in the preparation of the additive, no carbon nanotubes, zirconium oxide, titanium boride agent is added in the continuous-effect liquid, and no samarium chloride and graphene are added in the preparation of the titanium boride agent, the performance of the product tends to deteriorate to varying degrees. The additive obtained by the specific method of the present invention has the most significant performance effect on the product.

[0060] 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 embodied 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 illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0061] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A tungsten alloy contact material resistant to electrical corrosion, characterized in that: The contact material includes tungsten powder, copper powder and additives, and the mass ratio of the tungsten powder, copper powder and additives is (93-97): (4.9-2.1): (2.1-0.9).

2. The tungsten alloy contact material resistant to electrical corrosion according to claim 1, characterized in that: The mass ratio of the tungsten powder, copper powder and additive is 95:3.5:1.

5.

3. The tungsten alloy contact material resistant to electrical corrosion according to claim 1, characterized in that: The preparation method of the additive is: S1: Scandium powder and cerium powder are mixed in a weight ratio of 3:2, and then added to a continuous effect liquid that is 3-5 times the total amount of scandium powder for ultrasonic treatment. After the ultrasonic treatment is completed, the mixture is filtered and dried to obtain a scandium-cerium continuous effect liquid; The preparation method of the continuous effect liquid is as follows: 2-4 parts of carbon nanotubes, 3-5 parts of zirconium oxide, 1-2 parts of silane coupling agent KH550 and 5-8 parts of dopamine hydrochloride solution are uniformly mixed to obtain a continuous effect solution; S2: adding titanium boride into the scandium-cerium continuous effect solution in a weight ratio of 4:7 and stirring; after stirring, filtering and drying to obtain the additive.

4. The tungsten alloy contact material resistant to electrical corrosion according to claim 3, characterized in that: The ultrasonic power of the ultrasonic treatment is 350-400W, and the ultrasonic treatment is performed for 1 hour; the stirring speed of the stirring treatment is 550-750 r / min, and the stirring is performed for 20 minutes.

5. The tungsten alloy contact material resistant to electrical corrosion according to claim 3, characterized in that: The outer diameter of carbon nanotubes is 10-20 nm and the length is 3-5 μm.

6. The tungsten alloy contact material resistant to electrical corrosion according to claim 3, characterized in that: The mass fraction of the dopamine hydrochloride solution is 3-5%.

7. The tungsten alloy contact material resistant to electrical corrosion according to claim 3, characterized in that: The preparation method of the titanium boride agent is: Preheat titanium boride at 55-60° C. for 1 hour. After the preheating is completed, preheated titanium boride is obtained. 5-8 parts of the preheated titanium boride, 2-4 parts of samarium chloride and 1-3 parts of graphene are fully mixed, and then sintered. After the sintering is completed, a titanium boride agent is obtained.

8. The tungsten alloy contact material resistant to electrical corrosion according to claim 7, characterized in that: The sintering temperature of the sintering treatment is 210-230° C., and the sintering time is 2 hours.

9. A method for preparing the galvanic corrosion resistant tungsten alloy contact material according to any one of claims 1 to 8, characterized in that: The following steps are involved: Tungsten powder, copper powder and additives are fully mixed, then molded in a mold, and then infiltrated with copper and sintered to obtain tungsten alloy contact material.

10. The method for preparing a tungsten alloy contact material resistant to electrical corrosion according to claim 9, characterized in that: The compression molding process has a compression pressure of 35-40 MPa and a duration of 1 hour. The copper infiltration sintering process has a sintering temperature of 1200-1250° C. and a duration of 2 hours.

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