Metal material for sleeve composite double-insurance pipeline compensator and processing technology of metal material

Abstract

The invention relates to the technical field of metal materials, in particular to a metal material for a sleeve composite double-insurance pipeline compensator and a machining technology of the metal material. The invention discloses a metal material for a sleeve composite double-insurance pipeline compensator. The metal material consists of the following components in percentage by weight: 65-75% of a titanium-based composite material, 10-15% of elemental copper, 5-15% of elemental aluminum, 1-2% of elemental iron, 0.5-1% of elemental molybdenum, 0.5-1% of elemental zirconium and 0.5-1% of elemental silicon, the high-temperature-resistant corrosion-resistant pipeline has excellent corrosion resistance, can effectively resist corrosion of various corrosive media, prolongs the service life of a pipeline system, can still keep good mechanical properties under the high-temperature condition, effectively absorbs external pressure and impact to prevent damage or cracks caused by external impact, has good high-temperature performance, and is suitable for large-scale popularization and application. Excellent strength and stability can be kept in a high-temperature environment, good creep resistance and oxidation resistance can be shown, faults such as leakage and fracture of a pipeline are effectively prevented, and the overall reliability of a system is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of metal materials, and in particular to a metal material for a sleeve composite double-insurance pipeline compensator and a processing technology thereof. Background Art

[0002] Pipeline compensators are devices used in piping systems to compensate for pipe deformation or displacement caused by factors such as temperature changes, pressure fluctuations, and mechanical movement. During operation, pipes are subject to thermal expansion and contraction, as well as external forces. Pipeline compensators effectively absorb these deformations, reducing stress in the piping system, thereby protecting the safety of the pipeline and related equipment and extending its service life. The development of modern industry, particularly in pipeline systems operating in high-temperature and high-pressure environments such as those in the petroleum, chemical, and electric power industries, has placed higher demands on the performance of pipe compensators.

[0003] Existing metal materials used in pipeline compensators will corrode when exposed to highly corrosive gas or liquid environments. In particular, acidic and alkaline media in pipelines in the petroleum and chemical industries will accelerate the corrosion of the material and affect the normal operation of the compensator. At the same time, in high-temperature environments, the metal materials used in existing pipeline compensators cannot fully cope with excessive thermal expansion, which may cause the compensator to fail and affect the stability of the entire pipeline system.

[0004] In view of the above problems, the present invention provides a solution. Summary of the Invention

[0005] The purpose of the present invention is to provide a metal material for a sleeve composite double insurance pipe compensator and its processing technology, which

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: a metal material for a sleeve composite double-insurance pipeline compensator is composed of the following percentage components: 65-75% titanium-based composite material, 10-15% elemental copper, 5-15% elemental aluminum, 1-2% elemental iron, 0.5-1% elemental molybdenum, 0.5-1% elemental zirconium and 0.5-1% elemental silicon;

[0007] The preparation method of the titanium-based composite material comprises the following steps:

[0008] A1: Add elemental titanium, elemental aluminum, and elemental vanadium into a calcining furnace, raise the temperature to 1600°C, blow nitrogen into the calcining furnace with a blower at a speed of 1.5 m / s, and stir for 30 minutes. Then, maintain the temperature at 1600°C and calcine for 1.5 hours to obtain a mixed metal liquid.

[0009] A2: Inject the mixed metal liquid into the vacuum granulation chamber and adjust the vacuum degree of the vacuum granulation chamber to 10 -2 -10 -3pa, the cooling rate is 15℃ / min, after the temperature of the vacuum cooling chamber drops to 1400℃, the nozzle of the vacuum granulation chamber is opened, and the mixed metal liquid is sprayed out from the nozzle using argon gas to granulate. During the spraying process, the nozzle pressure is controlled at 2-3MPa, and the cooled and solidified mixed metal particles are collected;

[0010] A3: Place silicon nitride and carbon fiber in a mechanical crusher, set the crushing particle size to 500 mesh, and crush for 15 minutes. Collect the crushed products and repeat the crushing once to obtain reinforcement phase particles. Then transfer the reinforcement phase particles and mixed metal particles to a high-speed mixer, set the high-speed mixer speed to 3000 rpm, and mix at high speed for 30 minutes to obtain composite particles.

[0011] A4: The composite particles are loaded into a pressing mold, and the pressing mold is then transferred to a static press. The static press is adjusted to a temperature of 540-620°C and a pressure of 360-420 MPa for 30 minutes to obtain a titanium-based composite body.

[0012] A5: Transfer the titanium-based composite material green body to a sintering chamber, heat the sintering chamber to 1200-1300° C., and sinter for 1.5-2 hours to obtain the titanium-based composite material.

[0013] Furthermore, the mass ratio of elemental titanium, elemental aluminum, and elemental vanadium in step A1 is 45:3:2; the mass ratio of silicon nitride and carbon fiber in step A3 is 2:1; and the mass ratio of the reinforcing phase particles and the mixed metal particles in step A3 is 10:3;

[0014] Furthermore, a processing technology for metal materials for sleeve composite double insurance pipeline compensators includes the following steps:

[0015] B1: Add titanium-based composite materials, elemental copper, elemental aluminum, elemental iron, elemental molybdenum, elemental zirconium, and elemental silicon into a melting furnace, raise the temperature to 2700°C, and melt for 30 minutes. Then, use a blower to blow nitrogen into the melting furnace at a blower speed of 1.5 m / s, and stir with blowing for 30 minutes to obtain a metal premix.

[0016] B2: Pour the metal premix into a sand mold and cool it for 45-60 minutes, then take it out to form a metal preform for a sleeve composite double insurance pipe compensator. Take the cooled metal preform for the sleeve composite double insurance pipe compensator out of the sand mold and transfer it to an incinerator, heat it to 1000°C and hold it for 3 hours, then take it out and immerse it in a sand pile to slowly cool it to room temperature. After cooling, add the metal preform for the sleeve composite double insurance pipe compensator back into the incinerator, heat it to 2200°C, hold it for 10 minutes, then take it out and transfer it to an air cooling room, set the wind speed to 2m / s, and quickly cool it at room temperature to obtain a metal pre-piece for the sleeve composite double insurance pipe compensator.

[0017] B3: Place the metal front part of the sleeve composite double insurance pipe compensator in an ultrasonic cleaner, set the ultrasonic frequency to 80-100KHz, add 1.5-2L deionized water and ultrasonically clean for 20 minutes. After cleaning, transfer it to an oven, set the oven wind speed to 1.5m / s, and dry at 60℃ for 15 minutes;

[0018] B4: Place the dried sleeve composite double insurance pipe compensator metal front part into the coating spraying room, heat the high temperature anti-oxidation coating to a molten state, then open the spraying room nozzle, spray the high temperature anti-oxidation coating on the sleeve composite double insurance pipe compensator metal front part, the spraying thickness is 2mm, and place it in room temperature environment to cool naturally to obtain the sleeve composite double insurance pipe compensator metal material.

[0019] Furthermore, the high temperature oxidation resistant coating in step B4 is composed of the following percentage components: 45-50% elemental aluminum, 25-30% elemental silicon, 2-5% elemental nickel, and 2-5% elemental cobalt;

[0020] Furthermore, the preparation method of the high-temperature anti-oxidation coating described in step B4 is to put elemental aluminum, elemental silicon, elemental nickel and elemental cobalt into a high-speed mixer and shear mix them at 3500 rpm for 15 minutes;

[0021] In summary, due to the adoption of the above technical solution, the beneficial effect of the present invention is that the present invention has excellent corrosion resistance, can effectively resist the erosion of various corrosive media and extend the service life of the pipeline system, while still maintaining good mechanical properties under high temperature conditions, effectively absorbing external pressure and impact to prevent damage or cracks caused by external impact, and has good high-temperature performance, can maintain excellent strength and stability in high-temperature environments, can show good creep resistance and oxidation resistance, effectively prevent pipeline leakage and rupture and other failures to enhance the overall reliability of the system. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific examples.

[0023] Unless otherwise specified, the experimental methods in the following examples are conventional methods and were performed according to the techniques or conditions described in literature in the field or according to product specifications. The materials and reagents used in the following examples are all commercially available unless otherwise specified.

[0024] Example 1

[0025] 1: Add 4.5 kg of elemental titanium, 3 kg of elemental aluminum, and 2 kg of elemental vanadium into a calcining furnace, raise the temperature to 1600 ° C, blow nitrogen into the calcining furnace with a blower, set the blower speed to 1.5 m / s, blow and stir for 30 minutes, then maintain 1600 ° C, and calcine at high temperature for 1.5 hours to obtain a mixed metal liquid;

[0026] 2: Inject the mixed metal liquid into the vacuum granulation chamber and adjust the vacuum degree of the vacuum granulation chamber to 10 -2 pa, the cooling rate is 15℃ / min, after the temperature of the vacuum cooling chamber drops to 1400℃, the nozzle of the vacuum granulation chamber is opened, and the mixed metal liquid is sprayed out from the nozzle using argon gas to granulate. During the spraying process, the nozzle pressure is controlled at 2MPa, and the cooled and solidified mixed metal particles are collected;

[0027] 3: Place 2 kg of silicon nitride and 1 kg of carbon fiber into a mechanical crusher, set the crushing particle size to 500 mesh, and the crushing time to 15 minutes. Collect the crushed products and repeat the crushing once to obtain reinforcement phase particles. Then, transfer 3 kg of reinforcement phase particles and 10 kg of mixed metal particles into a high-speed mixer, set the high-speed mixer speed to 3000 rpm, and mix at high speed for 30 minutes to obtain composite particles.

[0028] 4: The composite particles were loaded into a pressing mold, and then the pressing mold was transferred to a static press. The static press temperature was adjusted to 540°C and the pressure was adjusted to 360 MPa for 30 minutes to obtain a titanium-based composite body.

[0029] 5: Transfer the titanium-based composite material green body to a sintering chamber, raise the temperature of the sintering chamber to 1200° C., and sinter for 1.5 hours to obtain the titanium-based composite material prepared in Example 1.

[0030] Example 2

[0031] 1: Add 4.5 kg of elemental titanium, 3 kg of elemental aluminum, and 2 kg of elemental vanadium into a calcining furnace, raise the temperature to 1600 ° C, blow nitrogen into the calcining furnace with a blower, set the blower speed to 1.5 m / s, blow and stir for 30 minutes, then maintain 1600 ° C, and calcine at high temperature for 1.5 hours to obtain a mixed metal liquid;

[0032] 2: Inject the mixed metal liquid into the vacuum granulation chamber and adjust the vacuum degree of the vacuum granulation chamber to 10 -3 pa, the cooling rate is 15℃ / min, after the temperature of the vacuum cooling chamber drops to 1400℃, the nozzle of the vacuum granulation chamber is opened, and the mixed metal liquid is sprayed out from the nozzle using argon gas to granulate. During the spraying process, the nozzle pressure is controlled at 3MPa, and the cooled and solidified mixed metal particles are collected;

[0033] 3: Place 2 kg of silicon nitride and 1 kg of carbon fiber into a mechanical crusher, set the crushing particle size to 500 mesh, and the crushing time to 15 minutes. Collect the crushed products and repeat the crushing once to obtain reinforcement phase particles. Then, transfer 3 kg of reinforcement phase particles and 10 kg of mixed metal particles into a high-speed mixer, set the high-speed mixer speed to 3000 rpm, and mix at high speed for 30 minutes to obtain composite particles.

[0034] 4: The composite particles were loaded into a pressing mold, and then the pressing mold was transferred to a static press. The static press temperature was adjusted to 620°C and the pressure was adjusted to 420 MPa for 30 minutes to obtain a titanium-based composite body.

[0035] 5: Transfer the titanium-based composite material green body to a sintering chamber, raise the temperature of the sintering chamber to 1300° C., and sinter for 2 h to obtain the titanium-based composite material prepared in Example 2.

[0036] Example 3

[0037] 1: 6.5 kg of the titanium-based composite material prepared in Example 1, 1 kg of elemental copper, 0.5 kg of elemental aluminum, 0.1 kg of elemental iron, 50 g of elemental molybdenum, 50 g of elemental zirconium, and 50 g of elemental silicon were added to a smelting furnace, heated to 2700° C., and smelted for 30 min. Subsequently, nitrogen was blown into the smelting furnace using a blower, the blower speed was set to 1.5 m / s, and the mixture was stirred for 30 min to obtain a metal premix;

[0038] 2: Pour the metal premix into a sand mold and cool it for 45 minutes, then take it out to form a metal preform for a sleeve composite double insurance pipe compensator. Take the cooled metal preform for the sleeve composite double insurance pipe compensator out of the sand mold and transfer it to an incinerator, heat it to 1000°C and hold it for 3 hours, then take it out and immerse it in a sand pile and slowly cool it to room temperature. After cooling, add the metal preform for the sleeve composite double insurance pipe compensator back into the incinerator, heat it to 2200°C, hold it for 10 minutes, then take it out and transfer it to an air cooling room, set the wind speed to 2m / s, and quickly cool it at room temperature to obtain a metal pre-installed part for the sleeve composite double insurance pipe compensator.

[0039] 3: Place the metal front part of the sleeve composite double insurance pipe compensator into an ultrasonic cleaner, set the ultrasonic frequency to 80KHz, add 1.5L deionized water and ultrasonically clean for 20 minutes. After cleaning, transfer it to an oven, set the oven wind speed to 1.5m / s, and dry it at 60℃ for 15 minutes;

[0040] 4: Put 500g of elemental aluminum, 300g of elemental silicon, 50g of elemental nickel and 50g of elemental cobalt into a high-speed mixer, shear and mix at 3500rpm for 15min to obtain a high-temperature anti-oxidation coating, then put the dried sleeve composite double-insurance pipe compensator metal material front part into the coating spray chamber, heat the high-temperature anti-oxidation coating to a molten state, then open the spray chamber nozzle, spray the high-temperature anti-oxidation coating on the surface of the sleeve composite double-insurance pipe compensator metal material front part, the spraying thickness is 2mm, and place it in a room temperature environment for natural cooling to obtain the sleeve composite double-insurance pipe compensator metal material prepared in Example 3.

[0041] Example 4

[0042] 1: 7.5 kg of the titanium-based composite material prepared in Example 2, 1.5 kg of elemental copper, 1.5 kg of elemental aluminum, 0.2 kg of elemental iron, 0.1 kg of elemental molybdenum, 0.1 kg of elemental zirconium, and 0.1 kg of elemental silicon were added to a smelting furnace, heated to 2700° C., and smelted for 30 min. Subsequently, nitrogen was blown into the smelting furnace using a blower, the blower speed was set to 1.5 m / s, and the mixture was stirred for 30 min to obtain a metal premix;

[0043] 2: Pour the metal premix into a sand mold and cool it for 60 minutes, then take it out to form a metal preform for a sleeve composite double insurance pipe compensator. Take the cooled metal preform for the sleeve composite double insurance pipe compensator out of the sand mold and transfer it to an incinerator, heat it to 1000°C and hold it for 3 hours, then take it out and immerse it in a sand pile and slowly cool it to room temperature. After cooling, add the metal preform for the sleeve composite double insurance pipe compensator back into the incinerator, heat it to 2200°C, hold it for 10 minutes, then take it out and transfer it to an air cooling room, set the wind speed to 2m / s, and quickly cool it at room temperature to obtain a metal pre-installed part for the sleeve composite double insurance pipe compensator.

[0044] 3: Place the metal front part of the sleeve composite double insurance pipe compensator into the ultrasonic cleaning instrument, set the ultrasonic frequency to 100KHz, add 2L of deionized water and ultrasonically clean it for 20 minutes. After cleaning, transfer it to the oven, set the oven wind speed to 1.5m / s, and dry it at 60℃ for 15 minutes;

[0045] 4: Put 450g of elemental aluminum, 250g of elemental silicon, 20g of elemental nickel and 20g of elemental cobalt into a high-speed mixer, shear and mix at 3500rpm for 15min to obtain a high-temperature anti-oxidation coating, then put the dried sleeve composite double-insurance pipe compensator metal material front part into the coating spraying chamber, heat the high-temperature anti-oxidation coating to a molten state, then open the spraying chamber nozzle, spray the high-temperature anti-oxidation coating on the sleeve composite double-insurance pipe compensator metal material front part, the spraying thickness is 2mm, and place it in a room temperature environment to cool naturally to obtain the sleeve composite double-insurance pipe compensator metal material prepared in Example 4.

[0046] Comparative Example 1

[0047] The specific implementation method of the Chinese patent publication number CN102410423B was selected as comparative example 1.

[0048] Comparative Example 2

[0049] The embodiment of the Chinese patent publication number CN102109074A was selected as comparative example 2.

[0050] Mechanical properties testing

[0051] Mechanical properties tests were performed on Example 3, Example 4, Comparative Example 1, and Comparative Example 2 in accordance with the "Standard for Mechanical Properties of Composite Materials" specified in GB / T17671-1999.

[0052] Table 1, Mechanical properties test results

[0053] tensile strength Yield strength Elongation hardness Example 3 872MPa 642MPa 18％ 341HB Example 4 886MPa 658MPa 18％ 348HB Comparative Example 1 587MPa 361MPa 34％ 217HB Comparative Example 2 606MPa 432MPa 16％ 264HB

[0054] By analyzing Table 1, it can be seen that the metal materials used for the sleeve composite double insurance pipe compensators prepared in Example 3 and Example 4 have better mechanical properties and meet practical standards.

[0055] Corrosion resistance test

[0056] According to the GB / T 9239-2007 standard "Test methods for water immersion resistance and corrosion resistance of composite materials", the corrosion resistance of Example 3, Example 4, Comparative Example 1 and Comparative Example 2 were tested;

[0057] Table 2, Corrosion resistance test results

[0058]

[0059] From the analysis of Table 6, it can be seen that the waterproof casings prepared in Example 3 and Example 4 have better corrosion resistance and are less likely to be damaged by corrosion during long-term use.

[0060] According to the requirements of the high temperature resistance and operating temperature range of the pipeline compensator material specified in the GB / T12777-2017 "Pipeline Compensator" standard, the high temperature resistance performance test was conducted on Example 3, Example 4, Comparative Example 1 and Comparative Example 2;

[0061] The high temperature tensile test was conducted according to GB / T228-2010 "Metallic Materials Tensile Test Methods". Example 3, Example 4, Comparative Example 1 and Comparative Example 2 were heated to 540°C, and then a tensile force of 200N was applied to the samples using a tensile testing machine to record the tensile strength.

[0062] High-temperature fatigue testing was performed according to GB / T 2791-2014 "Metallic Materials High-Temperature Fatigue Test Methods." Example 3, Example 4, Comparative Example 1, and Comparative Example 2 were heated to 540°C. A tensile force of 200 N was applied every 15 seconds, and crack initiation and propagation were recorded until the sample failed.

[0063] The high temperature static pressure is obtained by heating Example 3, Example 4, Comparative Example 1 and Comparative Example 2 to 540° C. and recording the maximum withstanding pressure value;

[0064] Thermal cycling test was conducted with reference to GB / T15256-2008 "High-temperature metal material thermal cycling test method". Example 3, Example 4, Comparative Example 1 and Comparative Example 2 were subjected to repeated thermal cycling at 500°C and room temperature to observe the occurrence of cracks in the samples.

[0065] Table 3, high temperature resistance test results

[0066]

[0067]

[0068] By analyzing Table 3, it can be seen that in the thermal cycle test, the metal materials for the sleeve composite double insurance pipe compensators prepared in Example 3 and Example 4 have good heat resistance and are basically not affected by temperature rise.

[0069] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal material for a sleeve composite double insurance pipeline compensator, characterized in that: Composed of the following percentages: 65-75% titanium matrix composite material, 10-15% elemental copper, 5-15% elemental aluminum, 1-2% elemental iron, 0.5-1% elemental molybdenum, 0.5-1% elemental zirconium and 0.5-1% elemental silicon; The preparation method of the titanium-based composite material comprises the following steps: A1: Add elemental titanium, elemental aluminum, and elemental vanadium into a calcining furnace, raise the temperature to 1600°C, blow nitrogen into the calcining furnace with a blower at a speed of 1.5 m / s, and stir for 30 minutes. Then, maintain the temperature at 1600°C and calcine for 1.5 hours to obtain a mixed metal liquid. A2: Inject the mixed metal liquid into the vacuum granulation chamber and adjust the vacuum degree of the vacuum granulation chamber to 10 -2 -10 -3 Pa, the cooling rate is 15℃ / min, after the temperature of the vacuum cooling chamber drops to 1400℃, the vacuum granulation chamber nozzle is opened, and the mixed metal liquid is sprayed out of the nozzle using argon gas to granulate. During the spraying process, the nozzle pressure is controlled at 2-3MPa, and the cooled and solidified mixed metal particles are collected; A3: Place silicon nitride and carbon fiber in a mechanical crusher, set the crushing particle size to 500 mesh, and crush for 15 minutes. Collect the crushed products and repeat the crushing once to obtain reinforcement phase particles. Then transfer the reinforcement phase particles and mixed metal particles to a high-speed mixer, set the high-speed mixer speed to 3000 rpm, and mix at high speed for 30 minutes to obtain composite particles. A4: The composite particles are loaded into a pressing mold, and the pressing mold is then transferred to a static press. The static press is adjusted to a temperature of 540-620°C and a pressure of 360-420 MPa for 30 minutes to obtain a titanium-based composite body. A5: Transfer the titanium-based composite material body to a sintering chamber, heat the sintering chamber to 1200-1300° C., and sinter for 1.5-2 hours to obtain the titanium-based composite material.

2. The metal material for a sleeve composite double insurance pipeline compensator according to claim 1 is characterized in that: The mass ratio of elemental titanium, elemental aluminum, and elemental vanadium in step A1 is 45:3:

2.

3. The metal material for a sleeve composite double insurance pipeline compensator according to claim 1 is characterized in that: The mass ratio of silicon nitride to carbon fiber described in step A3 is 2:

1.

4. The metal material for a sleeve composite double insurance pipeline compensator according to claim 1 is characterized in that: The mass ratio of the reinforcement phase particles to the mixed metal particles in step A3 is 10:

3.

5. The processing technology of metal material for sleeve composite double insurance pipeline compensator according to claim 1 is characterized in that: The following steps are involved: B1: Add titanium-based composite materials, elemental copper, elemental aluminum, elemental iron, elemental molybdenum, elemental zirconium, and elemental silicon into a melting furnace, raise the temperature to 2700°C, and melt for 30 minutes. Then, use a blower to blow nitrogen into the melting furnace at a blower speed of 1.5 m / s, and stir with blowing for 30 minutes to obtain a metal premix. B2: Pour the metal premix into a sand mold and cool it for 45-60 minutes, then take it out to form a metal preform for a sleeve composite double insurance pipe compensator. Take the cooled metal preform for the sleeve composite double insurance pipe compensator out of the sand mold and transfer it to an incinerator, heat it to 1000°C and hold it for 3 hours, then take it out and immerse it in a sand pile to slowly cool it to room temperature. After cooling, add the metal preform for the sleeve composite double insurance pipe compensator back into the incinerator, heat it to 2200°C, hold it for 10 minutes, then take it out and transfer it to an air cooling room, set the wind speed to 2m / s, and quickly cool it at room temperature to obtain a metal pre-piece for the sleeve composite double insurance pipe compensator. B3: Place the metal front part of the sleeve composite double insurance pipe compensator in an ultrasonic cleaner, set the ultrasonic frequency to 80-100KHz, add 1.5-2L deionized water and ultrasonically clean for 20 minutes. After cleaning, transfer it to an oven, set the oven wind speed to 1.5m / s, and dry at 60℃ for 15 minutes; B4: Place the dried sleeve composite double insurance pipe compensator metal front part into the coating spraying room, heat the high temperature anti-oxidation coating to a molten state, then open the spraying room nozzle, spray the high temperature anti-oxidation coating on the sleeve composite double insurance pipe compensator metal front part, the spraying thickness is 2mm, and place it in room temperature environment to cool naturally to obtain the sleeve composite double insurance pipe compensator metal material.

6. The processing technology of metal material for sleeve composite double insurance pipeline compensator according to claim 5 is characterized in that: The high temperature oxidation resistant coating in step B4 is composed of the following percentage components: 45-50% elemental aluminum, 25-30% elemental silicon, 2-5% elemental nickel and 2-5% elemental cobalt.

7. The processing technology of metal material for sleeve composite double insurance pipeline compensator according to claim 5 is characterized in that: The preparation method of the high-temperature anti-oxidation coating described in step B4 is to put elemental aluminum, elemental silicon, elemental nickel and elemental cobalt into a high-speed mixer and shear mix them at 3500 rpm for 15 minutes.

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