阅读说明：本技术 一种高性能陶瓷内衬复合钢管的生产工艺 (Production process of high-performance ceramic lining composite steel pipe ) 是由 金明成 金士伟 于 2021-07-20 设计创作，主要内容包括：本发明公开了一种高性能陶瓷内衬复合钢管的生产工艺,涉及钢管领域,通过将2,4-二氨基甲苯加入到三口烧瓶中,加入干燥的均苯四甲酸二酐,得到产物B,将SiO-2和B-4C混合均匀,加入硅烷偶联剂,超声分散,得到产物C,将产物C加入到产物B中,得到该添加剂A；解决了现有的陶瓷钢材料不能满足耐高温的需求,在受到冲击和振动过程中易产生裂纹,原料易发生团聚分散性差的问题；当陶瓷钢管受到冲击时,分散在基体中的Si0-2可吸收基体中微裂纹的冲击能,阻止裂纹扩大,从而增强体系的力学性能,熔融状态的B-20-3会流动到陶瓷界面裂纹处抑制裂纹扩散,使陶瓷界面更加致密化,从而达到陶瓷钢管耐高温且不易产生裂纹的目的。(The invention discloses a production process of a high-performance ceramic lining composite steel pipe, which relates to the field of steel pipes and comprises the steps of adding 2, 4-diaminotoluene into a three-neck flask, adding dry pyromellitic dianhydride to obtain a product B, and adding SiO 2 And B 4 C, uniformly mixing, adding a silane coupling agent, performing ultrasonic dispersion to obtain a product C, and adding the product C into a product B to obtain the additive A; the problems that the existing ceramic steel material can not meet the requirement of high temperature resistance, cracks are easy to generate in the process of being impacted and vibrated, and the raw materials are easy to generate poor agglomeration and dispersion are solved; ceramic steel pipeSi0 dispersed in the matrix upon impact 2 Can absorb the impact energy of the microcrack in the matrix and prevent the crack from expanding, thereby enhancing the mechanical property of the system and B in a molten state 2 0 3 The ceramic steel pipe can flow to the crack of the ceramic interface to inhibit crack diffusion, so that the ceramic interface is more densified, and the aims of high temperature resistance and difficult crack generation of the ceramic steel pipe are fulfilled.)

1. The production process of the high-performance ceramic lining composite steel pipe is characterized by comprising the following preparation processes:

s1: crushing aluminum powder, iron oxide red, iron oxide, mica powder, an additive A and an additive B, and then uniformly stirring the mixture in a stirrer to obtain a blend;

s2: filling the steel pipe into a pipe die of a pipe making machine, and adding the blend into the steel pipe;

s3: and opening a tube making machine, heating the steel tube, sintering under the action of centrifugal force, and cooling to room temperature to obtain the high-performance ceramic lining composite steel tube.

2. The production process of the high-performance ceramic-lined composite steel pipe as claimed in claim 1, wherein the dosage ratio of the aluminum powder, the iron oxide red, the iron oxide, the mica powder, the additive A and the additive B in the step S1 is 15-20 g: 20-30 g: 20-25 g: 2-5 g: 2-5 g: 1-2 g.

3. The production process of the high-performance ceramic lining composite steel pipe according to claim 1, wherein the preparation steps of the additive A are as follows:

s31: adding 2, 4-diaminotoluene into a three-neck flask, controlling the temperature at 5-7 ℃, adding a solvent N, N-dimethylacetamide, stirring under the protection of nitrogen, adding dry pyromellitic dianhydride, and mechanically stirring for 7-8 hours to obtain a product B;

s32: mixing SiO₂And B₄C, uniformly mixing, adding a silane coupling agent, adding a solvent ethanol, stirring for 1-2h, performing ultrasonic dispersion for 1-2h, and moving to a drying oven at 80-90 ℃ for drying for 4-5h to obtain a product C;

s33: adding the product C into the product B, stirring for 1-2h, heating to 150-200 ℃ at the speed of 5 ℃/min, preserving heat for 1-2h, heating to 250-280 ℃ at the speed of 1 ℃/min, preserving heat for 2-3h, and naturally cooling to room temperature to obtain the additive A.

4. The process of claim 3, wherein the molar ratio of 2, 4-diaminotoluene to pyromellitic dianhydride in step S31 is 1.2-1.3: 1.

5. the process for producing a high performance ceramic lined composite steel pipe as claimed in claim 3, wherein said SiO in step S32₂、B₄The dosage ratio of C to the silane coupling agent is 10 g: 10 g: 1g of the total weight of the composition.

6. The production process of the high-performance ceramic-lined composite steel pipe as claimed in claim 3, wherein the dosage ratio of the product C to the product B in the step S33 is 1 g: 1g of the total weight of the composition.

7. The production process of the high-performance ceramic lining composite steel pipe according to claim 1, wherein the preparation steps of the additive B are as follows:

s71: adding hydroxyethyl cellulose and diallyl ammonium chloride into a three-neck flask provided with a stirrer, a reflux condenser tube, a dropping funnel and a nitrogen inlet tube, adding deionized water as a solvent, introducing nitrogen, heating to 75-85 ℃, adding an initiator and 4-pentenoic acid, and reacting for 4-5 hours under heat preservation to obtain a product A;

s72: cooling the product A to 40-50 ℃, and adding sodium hydroxide solution to adjust the pH to 7-8 to obtain the additive B.

8. The process for producing a high-performance ceramic-lined composite steel pipe as claimed in claim 7, wherein the initiator in step S71 is potassium persulfate, the mass of the initiator is 2% of the total mass of hydroxyethyl cellulose, 4-pentenoic acid and diallylammonium chloride, and the ratio of the amount of hydroxyethyl cellulose, 4-pentenoic acid and diallylammonium chloride is 25 g: 17 g: 0.4 g.

9. The process for producing a high-performance ceramic-lined composite steel pipe as claimed in claim 7, wherein the mass fraction of sodium hydroxide in step S72 is 30%.

Technical Field

The invention relates to the field of steel pipes, in particular to a production process of a high-performance ceramic lining composite steel pipe.

Background

The metal-based composite material is a novel high-technology engineering material, has higher specific stiffness, specific strength, excellent high-temperature performance, low thermal expansion coefficient and good wear resistance and friction reduction, is a ceramic steel material, is increasingly applied to our lives, is favored by users due to the fact that the ceramic steel material has multiple advantages of ceramic and steel, is a composite pipe formed by combining ceramic and metal, and has the characteristics of excellent wear resistance and corrosion resistance;

the existing ceramic steel material can not meet the requirement of high temperature resistance, cracks are easy to generate in the process of impact and vibration, so that a ceramic interface is damaged, a steel pipe structure is damaged, the service life is shortened, raw materials are easy to agglomerate in the production process, the dispersibility is poor, and the ceramic interface is uneven in distribution when the ceramic steel material is centrifugally sintered;

therefore, how to improve the problems that the prior ceramic steel material is easy to generate cracks in the process of being impacted and vibrated, the raw materials are easy to agglomerate, the dispersibility is poor, and the ceramic interface distribution is uneven when the ceramic steel material is centrifugally sintered is the problem to be solved by the invention.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a production process of a high-performance ceramic lining composite steel pipe, which comprises the following steps:

(1) adding 2, 4-diaminotoluene into a three-neck flask, adding dried pyromellitic dianhydride to obtain a product B, and adding SiO₂And B₄C, uniformly mixing, adding a silane coupling agent, performing ultrasonic dispersion to obtain a product C, and adding the product C into a product B to obtain the additive A, so that the problems that the existing ceramic steel material cannot meet the requirement of high temperature resistance, cracks are easily generated in the process of impact and vibration, and the service life is shortened are solved;

(2) the additive B is obtained by adding hydroxyethyl cellulose and diallyl ammonium chloride into a three-neck flask, adding an initiator and 4-pentenoic acid to obtain a product A, and adding a sodium hydroxide solution to adjust the pH value, so that the problems that raw materials are easy to agglomerate, the dispersibility is poor, and the ceramic interface is not uniformly distributed during centrifugal sintering of the existing ceramic steel material are solved.

The purpose of the invention can be realized by the following technical scheme:

a production process of a high-performance ceramic lining composite steel pipe comprises the following preparation processes:

s1: crushing aluminum powder, iron oxide red, iron oxide, mica powder, an additive A and an additive B, and then uniformly stirring the mixture in a stirrer to obtain a blend;

s2: filling the steel pipe into a pipe die of a pipe making machine, and adding the blend into the steel pipe;

s3: and opening a tube making machine, heating the steel tube, sintering under the action of centrifugal force, and cooling to room temperature to obtain the high-performance ceramic lining composite steel tube.

As a further scheme of the invention: in the step S1, the dosage ratio of the aluminum powder, the iron oxide red, the iron oxide, the mica powder, the additive A and the additive B is 15-20 g: 20-30 g: 20-25 g: 2-5 g: 2-5 g: 1-2 g.

As a further scheme of the invention: the preparation steps of the additive A are as follows:

s31: adding 2, 4-diaminotoluene into a three-neck flask, controlling the temperature at 5-7 ℃, adding a solvent N, N-dimethylacetamide, stirring under the protection of nitrogen, adding dry pyromellitic dianhydride, and mechanically stirring for 7-8 hours to obtain a product B;

s32: mixing SiO₂And B₄C, uniformly mixing, adding a silane coupling agent, adding a solvent ethanol, stirring for 1-2h, performing ultrasonic dispersion for 1-2h, and moving to a drying oven at 80-90 ℃ for drying for 4-5h to obtain a product C;

s33: adding the product C into the product B, stirring for 1-2h, heating to 150-200 ℃ at the speed of 5 ℃/min, preserving heat for 1-2h, heating to 250-280 ℃ at the speed of 1 ℃/min, preserving heat for 2-3h, and naturally cooling to room temperature to obtain the additive A.

As a further scheme of the invention: in the step S31, the molar ratio of the 2, 4-diaminotoluene to the pyromellitic dianhydride is 1.2-1.3: 1.

as a further scheme of the invention: SiO in step S32₂、B₄The dosage ratio of C to the silane coupling agent is 10 g: 10 g: 1g of the total weight of the composition.

As a further scheme of the invention: the dosage ratio of the product C to the product B in the step S33 is 1 g: 1g of the total weight of the composition.

As a further scheme of the invention: the preparation steps of the additive B are as follows:

s71: adding hydroxyethyl cellulose and diallyl ammonium chloride into a three-neck flask provided with a stirrer, a reflux condenser tube, a dropping funnel and a nitrogen inlet tube, adding deionized water as a solvent, introducing nitrogen, heating to 75-85 ℃, adding an initiator and 4-pentenoic acid, and reacting for 4-5 hours under heat preservation to obtain a product A;

s72: cooling the product A to 40-50 ℃, and adding sodium hydroxide solution to adjust the pH to 7-8 to obtain the additive B.

As a further scheme of the invention: in the step S71, the initiator is potassium persulfate, the mass of the initiator is 2% of the total mass of the hydroxyethyl cellulose, the 4-pentenoic acid and the diallylammonium chloride, and the dosage ratio of the hydroxyethyl cellulose, the 4-pentenoic acid and the diallylammonium chloride is 25 g: 17 g: 0.4 g.

As a further scheme of the invention: in step S72, the sodium hydroxide is 30% by mass.

The invention has the beneficial effects that:

the invention adds 2, 4-diaminotoluene into a three-neck flask, adds dried pyromellitic dianhydride to obtain a product B, and adds SiO₂And B₄C, uniformly mixing, adding a silane coupling agent, performing ultrasonic dispersion to obtain a product C, adding the product C into the product B to obtain the additive A, synthesizing a polyimide resin matrix by using 2, 4-diaminotoluene and pyromellitic dianhydride, and synthesizing small-size nano Si0₂Uniformly dispersed in the matrix to play a role of dispersion strengthening in the matrix, and when the ceramic steel pipe is impacted, Si0 dispersed in the matrix₂Can absorb the impact energy of the microcrack in the matrix and prevent the crack from expanding, thereby enhancing the mechanical property of the system, namely the nano Si0₂Dispersed in polyimide resin matrix, and used as physical adsorption and chemical reaction active points of the system, firm connection is established between polymer molecular chains and nanometer active points, and chemical bonds are generatedAnd a physical adsorption mode, wherein stress is transferred in the compression shearing process to block slippage between high molecular chain segments, so that the bonding strength is improved, the polyimide resin matrix plays a main bonding role at the low temperature of 400 ℃, and when the temperature is increased to above 400 ℃, B₄C starts to generate oxidation reaction to react with oxygen in the air and gas micromolecules generated by thermal decomposition of polyimide to generate B with high-temperature fluidity and good wettability₂0₃，B₄C and Si0₂Not only is uniformly dispersed in the resin matrix through physical adsorption, but also can generate chemical reaction with the resin matrix to generate chemical bonding force with higher bond energy;

at the temperature of over 600 ℃, nano Si0₂And B₂0₃The reaction generates xSimOn.yB₂0₃And xSi0₂·yB₂0₃When the glass phase is equal, the system begins to be converted from an organic structure to an inorganic structure, the generated glass phase has good fluidity and interface wettability at high temperature, and can play a role in the whole high-temperature stage, when the temperature is increased to be more than 800 ℃, B₂0₃Chemically react with the ceramic interface to generate 2Al₂0₃-B₂0₃High chemical bonding force is formed, volume expansion occurs, volume contraction generated during thermal cracking of a resin matrix can be effectively inhibited, microcracks generated in ceramics can be healed, the integrity of a ceramic interface is ensured, and the temperature is over 1100 ℃, 2Al₂0₃-B₂0₃With Al₂0₃The ceramic interface continues to react, and B-O-Al bonds with large bond energy exist in the aluminum borate generated by the reaction, so that the mechanical property of the ceramic steel pipe at high temperature is improved, the ceramic steel pipe has good impact resistance, and the nano Si0₂Has good heat resistance, and B is high temperature of over 1100 DEG C₂0₃Begin to volatilize, Si0₂It also retains structural integrity, uniformly disperses in the adhesive system, and has adhesive effect at high temperature, and molten state B₂0₃Can flow to the crack of the ceramic interface to inhibit crack diffusion and enable the ceramic interface to be more densified, thereby achieving the purposes of high temperature resistance and no cracking of the ceramic steel pipeThe purpose of easy generation of cracks is achieved;

hydroxyethyl cellulose and diallyl ammonium chloride are added into a three-neck flask, an initiator and 4-pentenoic acid are added to obtain a product A, sodium hydroxide solution is added to adjust pH value to obtain an additive B, the additive B dissociates out quaternary ammonium ions with positive charges in a weak alkaline aqueous solution, and dissociates out carboxylate ions with negative charges to be adsorbed on the raw material, so that the molecular chain of the additive B has more adsorption points, the molecular chain wraps the surface of the raw material to form an organic protective layer to hinder aggregation of particles, and a branched chain part extends into the solution to form a steric hindrance effect to remove flocculation among particles, thereby achieving the purpose of improving the dispersibility of the raw material.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

the embodiment is a production process of a high-performance ceramic lining composite steel pipe, which comprises the following preparation processes:

s1: crushing aluminum powder, iron oxide red, iron oxide, mica powder, an additive A and an additive B, and then uniformly stirring the mixture in a stirrer to obtain a blend;

s2: filling the steel pipe into a pipe die of a pipe making machine, and adding the blend into the steel pipe;

s3: starting a tube making machine, heating the steel tube, sintering under the action of centrifugal force, and cooling to room temperature to obtain the high-performance ceramic lining composite steel tube;

the preparation steps of the additive A are as follows:

s31: adding 2, 4-diaminotoluene into a three-neck flask, controlling the temperature at 5 ℃, adding a solvent N, N-dimethylacetamide, stirring under the protection of nitrogen, adding dry pyromellitic dianhydride, and mechanically stirring for 7 hours to obtain a product B;

s32: mixing SiO₂And B₄C, uniformly mixing, adding a silane coupling agent, adding a solvent ethanol, stirring for 1h, ultrasonically dispersing for 1h, and moving to a drying oven at the temperature of 80 ℃ for drying for 4h to obtain a product C;

s33: adding the product C into the product B, stirring for 1h, heating to 150 ℃ at the speed of 5 ℃/min, preserving heat for 1h, heating to 250 ℃ at the speed of 1 ℃/min, preserving heat for 2h, and naturally cooling to room temperature to obtain the additive A;

the preparation steps of the additive B are as follows:

s71: adding hydroxyethyl cellulose and diallyl ammonium chloride into a three-neck flask provided with a stirrer, a reflux condenser tube, a dropping funnel and a nitrogen inlet tube, adding deionized water as a solvent, introducing nitrogen, heating to 75 ℃, adding an initiator and 4-pentenoic acid, and reacting for 4 hours under heat preservation to obtain a product A;

s72: the product A was cooled to 40 ℃ and sodium hydroxide solution was added to adjust the pH to 7 to give the additive B.

Example 2:

the embodiment is a production process of a high-performance ceramic lining composite steel pipe, which comprises the following preparation processes:

s1: crushing aluminum powder, iron oxide red, iron oxide, mica powder, an additive A and an additive B, and then uniformly stirring the mixture in a stirrer to obtain a blend;

s2: filling the steel pipe into a pipe die of a pipe making machine, and adding the blend into the steel pipe;

s3: starting a tube making machine, heating the steel tube, sintering under the action of centrifugal force, and cooling to room temperature to obtain the high-performance ceramic lining composite steel tube;

the preparation steps of the additive A are as follows:

s31: adding 2, 4-diaminotoluene into a three-neck flask, controlling the temperature at 5 ℃, adding a solvent N, N-dimethylacetamide, stirring under the protection of nitrogen, adding dry pyromellitic dianhydride, and mechanically stirring for 7 hours to obtain a product B;

s32: mixing SiO₂And B₄C mixUniformly mixing, adding a silane coupling agent, adding a solvent ethanol, stirring for 1h, ultrasonically dispersing for 1h, and moving to a drying oven at 80 ℃ for drying for 4h to obtain a product C;

s33: adding the product C into the product B, stirring for 1h, heating to 150 ℃ at the speed of 5 ℃/min, preserving heat for 1h, heating to 250 ℃ at the speed of 1 ℃/min, preserving heat for 2h, and naturally cooling to room temperature to obtain the additive A;

the preparation steps of the additive B are as follows:

s71: adding hydroxyethyl cellulose and diallyl ammonium chloride into a three-neck flask provided with a stirrer, a reflux condenser tube, a dropping funnel and a nitrogen inlet tube, adding deionized water as a solvent, introducing nitrogen, heating to 75 ℃, adding an initiator and 4-pentenoic acid, and reacting for 4 hours under heat preservation to obtain a product A;

s72: the product A was cooled to 40 ℃ and sodium hydroxide solution was added to adjust the pH to 7 to give the additive B.

Example 3:

the embodiment is a production process of a high-performance ceramic lining composite steel pipe, which comprises the following preparation processes:

s1: crushing aluminum powder, iron oxide red, iron oxide, mica powder, an additive A and an additive B, and then uniformly stirring the mixture in a stirrer to obtain a blend;

s2: filling the steel pipe into a pipe die of a pipe making machine, and adding the blend into the steel pipe;

s3: starting a tube making machine, heating the steel tube, sintering under the action of centrifugal force, and cooling to room temperature to obtain the high-performance ceramic lining composite steel tube;

the preparation steps of the additive A are as follows:

s31: adding 2, 4-diaminotoluene into a three-neck flask, controlling the temperature at 7 ℃, adding a solvent N, N-dimethylacetamide, stirring under the protection of nitrogen, adding dry pyromellitic dianhydride, and mechanically stirring for 8 hours to obtain a product B;

s32: mixing SiO₂And B₄C, uniformly mixing, adding a silane coupling agent, adding a solvent ethanol, stirring for 2 hours, ultrasonically dispersing for 2 hours, transferring to a drying oven at 90 ℃ and drying for 5 hours to obtain the modified starchTo product C;

s33: adding the product C into the product B, stirring for 2h, heating to 200 ℃ at the speed of 5 ℃/min, preserving heat for 2h, heating to 280 ℃ at the speed of 1 ℃/min, preserving heat for 3h, and naturally cooling to room temperature to obtain the additive A;

the preparation steps of the additive B are as follows:

s71: adding hydroxyethyl cellulose and diallyl ammonium chloride into a three-neck flask provided with a stirrer, a reflux condenser tube, a dropping funnel and a nitrogen inlet tube, adding deionized water as a solvent, introducing nitrogen, heating to 85 ℃, adding an initiator and 4-pentenoic acid, and reacting for 5 hours under the condition of heat preservation to obtain a product A;

s72: the product A was cooled to 50 ℃ and sodium hydroxide solution was added to adjust the pH to 8 to give the additive B.

Comparative example 1:

compared with the example 3, the comparative example does not add the additive A, and the rest steps are the same;

comparative example 2:

in this comparative example, compared with example 3, additive B was not added, and the rest of the procedure was the same;

measuring the compressive shear strength of the ceramic inner liners of the composite pipelines of the embodiments 1-3 and the comparative examples 1-2 by adopting a universal testing machine, cutting off a steel pipe layer of the composite pipeline, applying a certain pressure on the ceramic inner liner, carrying out heat treatment in a muffle furnace at 900 ℃, simulating an acid environment by using a sulfuric acid solution with the mass fraction of 30%, simulating an organic environment by using an ethanol solvent, taking out the ceramic inner liner after soaking the ceramic inner liner in the solution for several days, and testing the compressive shear strength of the ceramic inner liner;

the results are shown in the following table:

as can be seen from the above table, under the same test conditions, the initial shear strength of the experimental example reached 25 to 26MPa, while the initial shear strength of the comparative example was 15 to 18MPa, the shear strength of the experimental example soaked in a 30% by mass sulfuric acid solution for 5d was 23 to 24MPa, the shear strength of the comparative example soaked in a 30% by mass sulfuric acid solution for 5d was 14 to 16MPa, the shear strength of the experimental example soaked in a 30% by mass sulfuric acid solution for 15d was 12 to 13MPa, the shear strength of the comparative example soaked in a 30% by mass sulfuric acid solution for 15d was 6 to 9MPa, the shear strength of the experimental example soaked in a 30% by mass sulfuric acid solution for 25d was 10 to 11MPa, and the shear strength of the comparative example soaked in a 30% by mass sulfuric acid solution for 25d was 5 to 7MPa, the shear strength of an experimental example soaked in an ethanol solvent for 5d is 22-24MPa, the shear strength of a comparative example soaked in the ethanol solvent for 5d is 16MPa, the shear strength of an experimental example soaked in the ethanol solvent for 15d is 19-20MPa, the shear strength of a comparative example soaked in the ethanol solvent for 15d is 9-10MPa, the shear strength of an experimental example soaked in the ethanol solvent for 25d is 10-12MPa, the shear strength of a comparative example soaked in the ethanol solvent for 25d is 7-8MPa, and all data of the experimental examples are obviously superior to those of the comparative examples.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.