A high temperature resistant tungsten alloy material for engines

Abstract

The invention discloses a high temperature resistant tungsten alloy material for an engine, wherein the tungsten alloy material is prepared by preparing tungsten powder, a composite modification coordinator, and a treatment regulating liquid in a weight ratio of (19-21):2:(12-15). The tungsten alloy of the invention uses tungsten powder and a composite modification coordinator as coordination aids, and is coordinated and modified by Si powder, Ti, and modified graphene to make up for the defects of the tungsten powder alloy and enhance the high temperature resistance of the alloy. After being treated and modified by the treatment regulating liquid, the raw material interface of the product is enhanced, and the coordination performance effect between the raw materials is improved, thereby the high temperature resistance and corrosion resistance of the prepared product are coordinated and improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tungsten alloys, and in particular to a high temperature resistant tungsten alloy material for engines. Background Art

[0002] Tungsten alloy is an alloy composed of tungsten as the base and other elements. Among metals, tungsten has the highest melting point, high temperature strength and creep resistance, as well as good thermal conductivity, electrical conductivity and electron emission properties. It has a high specific gravity. In addition to being used in large quantities to make hard alloys and as alloy additives, tungsten and its alloys are widely used in the electronics and electric light source industries, and are also used in aerospace, casting, weapons and other departments to make rocket nozzles, die-casting molds, armor-piercing projectile cores, contacts, heating elements and heat shields.

[0003] Existing tungsten alloys have poor high temperature resistance and are easily corroded. The inventor optimizes product performance under high temperature conditions to coordinately improve its high temperature and corrosion performance. Based on this, the present invention provides a high temperature resistant tungsten alloy material for engines. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a high temperature resistant tungsten alloy material for an engine to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] The present invention provides a high temperature resistant tungsten alloy material for an engine. The tungsten alloy material is prepared by preparing and modifying tungsten powder, a composite modification coordinating agent and a treatment regulating liquid in a weight ratio of (19-21):2:(12-15).

[0007] Preferably, the particle size of the tungsten powder is 0.2-0.8 um.

[0008] Preferably, the preparation method of the composite modified coordinator is:

[0009] S01: adding graphene to a hydrochloric acid solution at a weight ratio of 1:5, then adding 5-10% of sodium alkyl sulfonate and 1-5% of sodium oxalate based on the total amount of graphene, stirring evenly, washing with water, and drying to obtain modified graphene;

[0010] S02: Add Si powder into 3-6 times the compound liquid, then add 2-5% Ti and 1-5% modified graphene to the total amount of Si powder, stir evenly, and finally wash and dry to obtain a composite modified coordinator.

[0011] Preferably, the mass fraction of the hydrochloric acid solution is 5-10%.

[0012] Preferably, the preparation method of the compound liquid is:

[0013] Add sodium dodecyl sulfate solution to 2-3 times of sodium alginate solution, then add lanthanum sulfate which is 10-20% of the weight of the sodium dodecyl sulfate solution, and finally add phosphate buffer solution which is 5-10% of the total weight of the sodium dodecyl sulfate solution, stir well to obtain a composite solution.

[0014] The inventors of the present invention have found that when the composite modified coordinator is replaced by Si powder and modified graphene is not added in the preparation of the composite modified coordinator, the high temperature resistance and acid resistance stability of the product are significantly deteriorated. At the same time, when the modified graphene is replaced by graphene, the performance change is not large compared with the composite modified coordinator without adding modified graphene. Therefore, the modified graphene prepared by the method of the present invention can have a significant effect on the performance of the product.

[0015] Preferably, the mass fraction of the sodium dodecyl sulfate solution is 20-30%, and the mass fraction of the sodium alginate solution is 15-20%.

[0016] Preferably, the pH value of the phosphate buffer solution is 5.5-6.0.

[0017] Preferably, the preparation method of the treatment conditioning solution is:

[0018] S11: adding 2-5 parts of silane coupling agent to 10-15 parts of sulfuric acid aqueous solution, and then adding 1-4 parts of chitosan, and stirring evenly;

[0019] S12: Add 1-3 parts of sodium phenol sulfonate and 1-2 parts of pentadecylphenol to 10-15 parts of deionized water, then add 0.2-0.5 parts of hydrochloric acid and stir thoroughly; stir the S12 product and the S11 product in a weight ratio of 1:5 to obtain a treated conditioning solution.

[0020] The inventors of the present invention also found that when the composite modified coordinator was not treated with a compound liquid or a treatment regulating liquid in the preparation of the composite modified coordinator, the performance of the product showed a trend of deterioration. When the treatment regulating liquid was not used, the performance of the product showed a trend of deterioration. Only when the composite modified coordinator was prepared by the method of the present invention and treated with a treatment regulating liquid at the same time, the performance of the product was significantly improved.

[0021] Preferably, the alkane coupling agent is coupling agent KH560; and the mass fraction of the aqueous sulfuric acid solution is 20-30%.

[0022] Preferably, the specific operation steps in the modification preparation are:

[0023] The tungsten powder and the composite modified coordinator are fully stirred, and finally sent into the treatment adjustment liquid and stirred evenly, and then washed with water, dried, and hot-pressed sintered at 1250-1310°C for 1-2h, and the sintering pressure is 10-15Mpa. When the sintering is completed, it is ready.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The tungsten alloy of the present invention uses tungsten powder and a composite modified coordinator as coordination aids, and is coordinated and modified by Si powder, Ti, and modified graphene to make up for the defects of the tungsten powder alloy and enhance the high temperature resistance of the alloy. After being treated and modified by a regulating liquid, the raw material interface of the product is enhanced, and the coordination performance effect between the raw materials is improved, thereby the high temperature resistance and corrosion resistance of the prepared product are coordinated and improved. DETAILED DESCRIPTION

[0026] 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 creative work are within the scope of protection of the present invention.

[0027] The present embodiment provides a high temperature resistant tungsten alloy material for an engine. The tungsten alloy material is prepared by modifying tungsten powder, a composite modification coordinator, and a treatment regulating liquid in a weight ratio of (19-21):2:(12-15).

[0028] The particle size of the tungsten powder in this embodiment is 0.2-0.8 um.

[0029] The preparation method of the composite modified coordinating agent of this embodiment is:

[0030] S01: adding graphene to a hydrochloric acid solution at a weight ratio of 1:5, then adding 5-10% of sodium alkyl sulfonate and 1-5% of sodium oxalate based on the total amount of graphene, stirring evenly, washing with water, and drying to obtain modified graphene;

[0031] S02: Add Si powder into 3-6 times the compound liquid, then add 2-5% Ti and 1-5% modified graphene to the total amount of Si powder, stir evenly, and finally wash and dry to obtain a composite modified coordinator.

[0032] The mass fraction of the hydrochloric acid solution in this embodiment is 5-10%.

[0033] The preparation method of the composite liquid of the present embodiment is:

[0034] Add sodium dodecyl sulfate solution to 2-3 times of sodium alginate solution, then add lanthanum sulfate which is 10-20% of the weight of the sodium dodecyl sulfate solution, and finally add phosphate buffer solution which is 5-10% of the total weight of the sodium dodecyl sulfate solution, stir well to obtain a composite solution.

[0035] The mass fraction of the sodium dodecyl sulfate solution in this embodiment is 20-30%, and the mass fraction of the sodium alginate solution is 15-20%.

[0036] The pH value of the phosphate buffer solution of this embodiment is 5.5-6.0.

[0037] The preparation method of the treatment conditioning solution of this embodiment is:

[0038] S11: adding 2-5 parts of silane coupling agent to 10-15 parts of sulfuric acid aqueous solution, and then adding 1-4 parts of chitosan, and stirring evenly;

[0039] S12: Add 1-3 parts of sodium phenol sulfonate and 1-2 parts of pentadecylphenol to 10-15 parts of deionized water, then add 0.2-0.5 parts of hydrochloric acid and stir thoroughly; stir the S12 product and the S11 product in a weight ratio of 1:5 to obtain a treated conditioning solution.

[0040] The alkane coupling agent in this embodiment is coupling agent KH560; the mass fraction of the sulfuric acid aqueous solution is 20-30%.

[0041] The specific steps in the modification preparation of this embodiment are:

[0042] The tungsten powder and the composite modified coordinator are fully stirred, and finally sent into the treatment adjustment liquid and stirred evenly, and then washed with water, dried, and hot-pressed sintered at 1250-1310°C for 1-2h, and the sintering pressure is 10-15Mpa. When the sintering is completed, it is ready.

[0043] Example 1.

[0044] The present embodiment provides a high temperature resistant tungsten alloy material for an engine, wherein the tungsten alloy material is prepared by modifying tungsten powder, a composite modification coordinating agent, and a treatment regulating liquid in a weight ratio of 19:2:12.

[0045] The particle size of the tungsten powder in this embodiment is 0.2 um.

[0046] The preparation method of the composite modified coordinating agent of this embodiment is:

[0047] S01: adding graphene to a hydrochloric acid solution at a weight ratio of 1:5, then adding 5% sodium alkyl sulfonate and 1% sodium oxalate based on the total amount of graphene, stirring evenly, washing with water, and drying to obtain modified graphene;

[0048] S02: Add Si powder into 3 times the compound liquid, then add 2% Ti and 1% modified graphene to the total amount of Si powder, stir evenly, and finally wash and dry to obtain a composite modified coordinator.

[0049] The mass fraction of the hydrochloric acid solution in this embodiment is 5-10%.

[0050] The preparation method of the composite liquid of the present embodiment is:

[0051] Add sodium dodecyl sulfate solution to 2 times sodium alginate solution, then add lanthanum sulfate which is 10% of the weight of the sodium dodecyl sulfate solution, and finally add phosphate buffer solution which is 5% of the total weight of the sodium dodecyl sulfate solution, stir well, and obtain a composite solution.

[0052] The mass fraction of the sodium dodecyl sulfate solution in this embodiment is 20%, and the mass fraction of the sodium alginate solution is 15%.

[0053] The pH value of the phosphate buffer solution in this example is 5.5.

[0054] The preparation method of the treatment conditioning solution of this embodiment is:

[0055] S11: adding 2 parts of silane coupling agent to 10 parts of sulfuric acid aqueous solution, and then adding 1 part of chitosan, and stirring evenly;

[0056] S12: Add 1 part of sodium phenol sulfonate and 1 part of pentadecylphenol to 10 parts of deionized water, then add 0.2 parts of hydrochloric acid and stir thoroughly; stir the S12 product and the S11 product in a weight ratio of 1:5 to obtain a treated conditioning solution.

[0057] The alkane coupling agent in this embodiment is coupling agent KH560; the mass fraction of the sulfuric acid aqueous solution is 20%.

[0058] The specific steps in the modification preparation of this embodiment are:

[0059] The tungsten powder and the composite modified coordinator are fully stirred, and finally sent into the treatment adjustment liquid and stirred evenly, and then washed with water, dried, and hot-pressed sintered at 1250°C for 1 hour with a sintering pressure of 10Mpa. The sintering is completed.

[0060] Example 2.

[0061] The present embodiment provides a high temperature resistant tungsten alloy material for an engine, wherein the tungsten alloy material is prepared by modifying tungsten powder, a composite modification coordinator, and a treatment regulating liquid in a weight ratio of 21:2:15.

[0062] The particle size of the tungsten powder in this embodiment is 0.8 um.

[0063] The preparation method of the composite modified coordinating agent of this embodiment is:

[0064] S01: adding graphene to a hydrochloric acid solution at a weight ratio of 1:5, then adding 10% sodium alkyl sulfonate and 5% sodium oxalate based on the total amount of graphene, stirring evenly, washing with water, and drying to obtain modified graphene;

[0065] S02: Add Si powder into 6 times the compound liquid, then add 5% Ti and 5% modified graphene to the total amount of Si powder, stir evenly, and finally wash and dry to obtain a composite modified coordinator.

[0066] The mass fraction of the hydrochloric acid solution in this embodiment is 10%.

[0067] The preparation method of the composite liquid of the present embodiment is:

[0068] Add sodium dodecyl sulfate solution to 3 times sodium alginate solution, then add lanthanum sulfate which is 20% of the weight of the sodium dodecyl sulfate solution, and finally add phosphate buffer solution which is 10% of the total weight of the sodium dodecyl sulfate solution, stir well, and obtain a composite solution.

[0069] The mass fraction of the sodium dodecyl sulfate solution in this embodiment is 30%, and the mass fraction of the sodium alginate solution is 20%.

[0070] The pH value of the phosphate buffer solution in this example is 6.0.

[0071] The preparation method of the treatment conditioning solution of this embodiment is:

[0072] S11: adding 5 parts of silane coupling agent to 15 parts of sulfuric acid aqueous solution, and then adding 4 parts of chitosan, and stirring evenly;

[0073] S12: Add 3 parts of sodium phenol sulfonate and 2 parts of pentadecylphenol to 15 parts of deionized water, then add 0.5 parts of hydrochloric acid and stir thoroughly; stir the S12 product and the S11 product in a weight ratio of 1:5 to obtain a treated conditioning solution.

[0074] The alkane coupling agent in this embodiment is coupling agent KH560; the mass fraction of the sulfuric acid aqueous solution is 20-30%.

[0075] The specific steps in the modification preparation of this embodiment are:

[0076] The tungsten powder and the composite modified coordinator are fully stirred, and finally sent into the treatment adjustment liquid and stirred evenly, and then washed with water, dried, and hot-pressed sintered at 1310°C for 2h with a sintering pressure of 15Mpa. The sintering is completed.

[0077] Example 3.

[0078] The present embodiment provides a high temperature resistant tungsten alloy material for an engine, wherein the tungsten alloy material is prepared by modifying tungsten powder, a composite modification coordinator, and a treatment regulating liquid in a weight ratio of 20:2:13.

[0079] The particle size of the tungsten powder in this embodiment is 0.5 um.

[0080] The preparation method of the composite modified coordinating agent of this embodiment is:

[0081] S01: adding graphene to a hydrochloric acid solution at a weight ratio of 1:5, then adding 7.5% of sodium alkyl sulfonate and 3% of sodium oxalate based on the total amount of graphene, stirring evenly, washing with water, and drying to obtain modified graphene;

[0082] S02: Add Si powder into 4.5 times the compound liquid, then add 3.5% Ti and 3% modified graphene to the total amount of Si powder, stir evenly, and finally wash and dry to obtain a composite modified coordinator.

[0083] The mass fraction of the hydrochloric acid solution in this embodiment is 7.5%.

[0084] The preparation method of the composite liquid of the present embodiment is:

[0085] Add sodium dodecyl sulfate solution to 2.5 times sodium alginate solution, then add lanthanum sulfate which is 15% of the weight of the sodium dodecyl sulfate solution, and finally add phosphate buffer solution which is 7.5% of the total weight of the sodium dodecyl sulfate solution, stir well, and obtain a composite solution.

[0086] The mass fraction of the sodium dodecyl sulfate solution in this embodiment is 25%, and the mass fraction of the sodium alginate solution is 17.5%.

[0087] The pH value of the phosphate buffer solution in this example is 5.7.

[0088] The preparation method of the treatment conditioning solution of this embodiment is:

[0089] S11: adding 3.5 parts of silane coupling agent to 12.5 parts of sulfuric acid aqueous solution, and then adding 2.5 parts of chitosan, and stirring evenly;

[0090] S12: Add 2 parts of sodium phenol sulfonate and 1.5 parts of pentadecylphenol to 12.5 parts of deionized water, then add 0.35 parts of hydrochloric acid and stir thoroughly; stir the S12 product and the S11 product in a weight ratio of 1:5 to obtain a treated conditioning solution.

[0091] The alkane coupling agent in this embodiment is coupling agent KH560; the mass fraction of the sulfuric acid aqueous solution is 25%.

[0092] The specific steps in the modification preparation of this embodiment are:

[0093] The tungsten powder and the composite modified coordinator are fully stirred, and finally sent into the treatment adjustment liquid and stirred evenly, and then washed with water, dried, and hot-pressed sintered at 1250-1310°C for 1-2h, and the sintering pressure is 10-15Mpa. When the sintering is completed, it is ready.

[0094] Example 4.

[0095] The present embodiment provides a high temperature resistant tungsten alloy material for an engine, wherein the tungsten alloy material is prepared by modifying tungsten powder, a composite modification coordinating agent, and a treatment regulating liquid in a weight ratio of 10:2:13.

[0096] The particle size of the tungsten powder in this embodiment is 0.3 um.

[0097] The preparation method of the composite modified coordinating agent of this embodiment is:

[0098] S01: adding graphene to a hydrochloric acid solution at a weight ratio of 1:5, then adding 6% sodium alkyl sulfonate and 2% sodium oxalate based on the total amount of graphene, stirring evenly, washing with water, and drying to obtain modified graphene;

[0099] S02: Add Si powder into 4 times the compound liquid, then add 2-5% Ti and 1-5% modified graphene to the total amount of Si powder, stir evenly, and finally wash and dry to obtain a composite modified coordinator.

[0100] The mass fraction of the hydrochloric acid solution in this embodiment is 6%.

[0101] The preparation method of the composite liquid of the present embodiment is:

[0102] The sodium dodecyl sulfate solution was added to 2.2 times of the sodium alginate solution, and then 12% of lanthanum sulfate by weight of the sodium dodecyl sulfate solution was added, and finally 6% of the total amount of the sodium dodecyl sulfate solution was added to the phosphate buffer solution, and the mixture was stirred thoroughly to obtain a composite solution.

[0103] The mass fraction of the sodium dodecyl sulfate solution in this embodiment is 22%, and the mass fraction of the sodium alginate solution is 18%.

[0104] The pH value of the phosphate buffer solution in this example is 5.5.

[0105] The preparation method of the treatment conditioning solution of this embodiment is:

[0106] S11: adding 3 parts of silane coupling agent to 12 parts of sulfuric acid aqueous solution, and then adding 2 parts of chitosan, and stirring evenly;

[0107] S12: Add 1.2 parts of sodium phenol sulfonate and 1.2 parts of pentadecylphenol to 12 parts of deionized water, then add 0.3 parts of hydrochloric acid and stir thoroughly; stir the S12 product and the S11 product in a weight ratio of 1:5 to obtain a treated conditioning solution.

[0108] The alkane coupling agent in this embodiment is coupling agent KH560; the mass fraction of the sulfuric acid aqueous solution is 22%.

[0109] The specific steps in the modification preparation of this embodiment are:

[0110] The tungsten powder and the composite modified coordinator are fully stirred, and finally sent into the treatment adjustment liquid and stirred evenly, and then washed with water, dried, and hot-pressed sintered at 1260°C for 1.2h with a sintering pressure of 12Mpa. The sintering is completed.

[0111] Comparative Example 1.

[0112] The difference from Example 3 is that the composite modified coordinating agent is replaced by Si powder.

[0113] Comparative Example 2.

[0114] The difference from Example 3 is that no modified graphene is added in the preparation of the composite modified coordinating agent.

[0115] Comparative Example 3.

[0116] The difference from Example 3 is that the modified graphene is replaced by graphene.

[0117] Comparative Example 4.

[0118] The difference from Example 3 is that no compounding liquid treatment is used in the preparation of the composite modified coordinating agent.

[0119] Comparative Example 5.

[0120] The difference from Example 3 is that no treatment with a treatment conditioning liquid is used.

[0121] The products of Examples 1-4 and Comparative Examples 1-5 were placed at 100°C for 10 hours, cooled, and then placed in a 5% hydrochloric acid solution for 24 hours. The performance tests were then performed as follows:

[0122]

[0123] It can be seen from Examples 1-4 and Comparative Examples 1-5 that the product of Example 3 of the present invention has excellent tensile strength and elongation, and the product has stable high temperature resistance and acid resistance;

[0124] It can be seen from Comparative Examples 1-5 that the composite modified coordinator is replaced by Si powder, and modified graphene is not added in the preparation of the composite modified coordinator, and the high temperature resistance and acid resistance stability of the product are significantly deteriorated. At the same time, the modified graphene is replaced by graphene, and the performance change is not large compared with the composite modified coordinator. Therefore, the modified graphene prepared by the method of the present invention can have a significant effect on the performance of the product;

[0125] In addition, in the preparation of the composite modified coordinator, no compound liquid treatment and no treatment regulating liquid treatment were used, and the performance of the products showed a trend of deterioration. Only when the composite modified coordinator prepared by the method of the present invention is used in combination with the treatment regulating liquid treatment, the performance of the product is significantly improved.

[0126] 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0127] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high temperature resistant tungsten alloy material for an engine, characterized in that: The tungsten alloy material is prepared by preparing tungsten powder, a composite modification coordinator, and a treatment adjustment liquid in a weight ratio of (19-21):2:(12-15); The preparation method of the composite modified coordinating agent is: S01: adding graphene to a hydrochloric acid solution, wherein the weight ratio of graphene to the hydrochloric acid solution is 1:5, then adding 5-10% of sodium alkyl sulfonate and 1-5% of sodium oxalate based on the weight of graphene, stirring evenly, washing with water and drying to obtain modified graphene; S02: Adding Si powder to the compound liquid, wherein the weight ratio of Si powder to compound liquid is 1:(3-6), then adding 2-5% of Ti by weight of Si powder and 1-5% of modified graphene by weight of Si powder, stirring evenly, and finally washing and drying to obtain a composite modified coordinator; The preparation method of the composite liquid is: Adding sodium dodecyl sulfate solution to sodium alginate solution, wherein the weight ratio of sodium dodecyl sulfate solution to sodium alginate solution is 1:(2-3), then adding lanthanum sulfate in an amount of 10-20% by weight of the sodium dodecyl sulfate solution, and finally adding phosphate buffer solution in an amount of 5-10% by weight of the sodium dodecyl sulfate solution, and stirring thoroughly to obtain a composite solution; The preparation method of the treatment regulating solution is: S11: adding 2-5 parts by weight of a silane coupling agent to 10-15 parts by weight of an aqueous sulfuric acid solution, and then adding 1-4 parts by weight of chitosan, and stirring evenly; S12: adding 1-3 parts by weight of sodium phenol sulfonate and 1-2 parts by weight of pentadecylphenol to 10-15 parts by weight of deionized water, and then adding 0.2-0.5 parts by weight of hydrochloric acid, and stirring thoroughly; S13: The product of S12 and the product of S11 are fully stirred at a weight ratio of 1:5 to obtain a treated conditioned liquid.

2. According to claim 1, a high temperature resistant tungsten alloy material for an engine, characterized in that: The particle size of the tungsten powder is 0.2-0.8 μm.

3. According to claim 1, a high temperature resistant tungsten alloy material for an engine, characterized in that: The mass fraction of the hydrochloric acid solution is 5-10%.

4. The high temperature resistant tungsten alloy material for an engine according to claim 1, characterized in that: The mass fraction of the sodium dodecyl sulfate solution is 20-30% and the mass fraction of the sodium alginate solution is 15-20%.

5. The high temperature resistant tungsten alloy material for an engine according to claim 1, characterized in that: The pH value of the phosphate buffer solution is 5.5-6.

0.

6. The high temperature resistant tungsten alloy material for an engine according to claim 1, characterized in that: The alkane coupling agent is coupling agent KH560; the mass fraction of the sulfuric acid aqueous solution is 20-30%.

7. The high temperature resistant tungsten alloy material for an engine according to claim 1, characterized in that: The specific operation steps in the modification preparation are: The tungsten powder and the composite modified coordinator are fully stirred, and finally sent into the treatment adjustment liquid and stirred evenly, then washed and dried, and hot-pressed sintered at 1250-1310°C for 1-2h, with a sintering pressure of 10-15MPa, and the sintering is completed.

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