WO2023165187A1 - Alliage à éléments multiples à base de cu-ni-sn pour l'exploitation de pétrole et de gaz et son procédé de préparation - Google Patents

Alliage à éléments multiples à base de cu-ni-sn pour l'exploitation de pétrole et de gaz et son procédé de préparation Download PDF

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WO2023165187A1
WO2023165187A1 PCT/CN2022/135122 CN2022135122W WO2023165187A1 WO 2023165187 A1 WO2023165187 A1 WO 2023165187A1 CN 2022135122 W CN2022135122 W CN 2022135122W WO 2023165187 A1 WO2023165187 A1 WO 2023165187A1
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oil
alloy
source
gas development
melt
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PCT/CN2022/135122
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Chinese (zh)
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周延军
宋克兴
杨少丹
杨冉
周菲
张学宾
张彦敏
郁炎
陈纪东
冯江
张朝民
李韶林
肖柱
郭慧稳
朱倩倩
岳鹏飞
张国赏
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河南科技大学
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon

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  • the invention belongs to the technical field of metal materials, and in particular relates to a multi-component Cu-Ni-Sn-based alloy for oil and gas development and a preparation method thereof.
  • MWD and LWD drilling tools for oil drilling, as well as oil exploration well guide rods, electric pump components, exploration probes, deep sea explosion-proof, separable connection valves and other oil drilling equipment and Equipment components mainly use copper alloy materials, which require high strength, high wear resistance, high temperature resistance, non-magnetic explosion-proof, etc. under harsh service conditions such as high temperature, high pressure, high load, and high stability. characteristic.
  • high-strength, wear-resistant and durable performance of copper alloy materials used in the above fields has been a key issue that plagues the development of the industry.
  • Commonly used wear-resistant copper alloys mainly include brass, tin bronze, aluminum bronze, and beryllium bronze.
  • Cu-Ni-Sn-based alloys are widely used in fields such as oil and gas, marine engineering, electronic appliances, and machinery manufacturing due to their excellent mechanical properties, wear resistance, and corrosion resistance.
  • macroscopic component segregation and microscopic dendritic segregation are easy to occur under conventional casting conditions, which is not conducive to subsequent processing deformation, and at the same time makes it difficult to improve the overall performance of the material. .
  • the object of the present invention is to provide a multi-component Cu-Ni-Sn based alloy for oil and gas development and its preparation method, to solve or improve the Cu-Ni-Sn alloy in the prior art, which is prone to produce macroscopic component segregation or microscopic dendrite segregation, which is not It is beneficial to at least one of the problems of subsequent processing deformation, strength and wear resistance to be improved.
  • the present invention provides the following technical solutions: a multi-component Cu-Ni-Sn-based alloy for oil and gas development, comprising the following components in weight percentage: Ni 7-20%, Sn 4-12%, Si 0.3-1.2%, Al 0.2-3.0%, Nb 0.02-0.5%, Mn 0.2-2.0% and Fe 0.2-2.0%, the balance is Cu.
  • the present invention also provides the above-mentioned method for preparing a multi-component Cu-Ni-Sn-based alloy for oil and gas development, which adopts the following technical scheme: the above-mentioned method for preparing a multi-component Cu-Ni-Sn-based alloy for oil and gas development, Including the following steps: (1) Smelting: first add electrolytic copper to the melting furnace to completely melt the electrolytic copper, then add Ni source, then add Nb source, Mn source, Fe source and Si source, and finally add Al source and Sn source , smelting at 1150-1250°C for 30-50min; (2) pouring: after the melt obtained in step (1) is in a mirror-like shape, let it stand for 1-3min, and pour the melt into a metal mold after standing, The melt is solidified to obtain an ingot; (3) performing homogenization annealing, hot extrusion deformation, solution heat treatment, cold drawing deformation and aging heat treatment on the ingot.
  • the present invention adds silicon (Si), aluminum (Al), niobium (Nb), manganese (Mn), iron (Fe) and other alloying elements to the Cu-Ni-Sn alloy matrix by means of microalloying. Under the synergistic effect of these elements, the micro-segregation in the solidification structure of the alloy is improved, and the strength and wear resistance of the alloy are synergistically improved.
  • the addition of Si element can inhibit the formation of reverse segregation during solidification of the alloy, obtain fine grains, improve the hot/cold workability of the alloy, and improve the strength of the alloy through the formation of a series of NiSi strengthening phases through Si and Ni;
  • Al and Ni elements can form A series of NiAl strengthening phases can significantly improve the mechanical properties of the alloy;
  • Nb element can promote the decomposition process of the alloy amplitude modulation, improve the resistance of the alloy to recovery and recrystallization softening ability, and the Nb-rich ⁇ phase is formed in the grain and grain boundary, which can be significantly improved during the aging process.
  • Mn element can refine as-cast grain structure, improve age hardening peak strength of alloy, and inhibit grain boundary reaction and grain coarsening, significantly Improve the strength and wear resistance of the alloy; the addition of a small amount of Fe can accelerate the deformation heat treatment process of the alloy and improve the strengthening effect and wear resistance.
  • the multi-element Cu-Ni-Sn-based alloy used for oil and gas development of the present invention (1) the alloy composition is uniform, the dendrite spacing of the as-cast microstructure becomes smaller, the distribution is more uniform, and the arrangement direction is more consistent; (2) the mechanical properties are excellent : Strength ⁇ 1000MPa, elongation ⁇ 3%; (3) Excellent wear resistance: wear rate ⁇ 0.1mg/m.
  • the multi-element Cu-Ni-Sn base alloy for oil and gas exploitation of the invention is especially suitable for key components of oil and gas exploitation.
  • Fig. 1 is the conventional Cu-15Ni-8Sn alloy microstructure diagram prepared
  • Fig. 2 is the microstructural diagram of the multi-element Cu-Ni-Sn based alloy for oil and gas development prepared in Example 1 of the present invention
  • Fig. 3 is the microstructural diagram of the multi-element Cu-Ni-Sn-based alloy for oil and gas development prepared in Example 2 of the present invention
  • Fig. 4 is a microstructure diagram of a multi-element Cu-Ni-Sn-based alloy for oil and gas development prepared in Example 3 of the present invention.
  • the present invention aims at at least one of the problems in the current prior art that Cu-Ni-Sn alloys are prone to macroscopic component segregation or microscopic dendrite segregation, which is not conducive to subsequent processing deformation, and strength and wear resistance need to be improved, and proposes an oil-gas development method.
  • Multi-element Cu-Ni-Sn-based alloy is used, including the following components in weight percentage: Ni 7-20%, Sn 4-12%, Si 0.3-1.2%, Al 0.2-3.0%, Nb 0.02-0.5% , Mn 0.2-2.0% and Fe 0.2-2.0%, the balance is Cu.
  • the contents of trace elements O, S and P are respectively: O ⁇ 5ppm, S ⁇ 3ppm, P ⁇ 3ppm.
  • the multi-component Cu-Ni-Sn based alloy for oil and gas development includes the following components in weight percentage: Ni 15%, Sn 8%, Si 0.8%, Al 1.2%, Nb 0.3%, Mn 0.5% and Fe 0.5%, the balance is Cu.
  • the multi-element Cu-Ni-Sn based alloy used for oil and gas development has a tensile strength ⁇ 1000 Mpa, an elongation ⁇ 3%, and a wear rate ⁇ 0.1 mg/m.
  • the present invention also proposes a method for preparing a multi-component Cu-Ni-Sn-based alloy for oil and gas development.
  • the method for preparing a multi-component Cu-Ni-Sn-based alloy for oil and gas development in an embodiment of the present invention includes the following steps: (1) smelting : First add electrolytic copper to the furnace to melt the electrolytic copper completely, then add Ni source, then Nb source, Mn source, Fe source and Si source, finally add Al source and Sn source, smelting at 1150-1250°C for 30-50min (2) pouring: after the molten solution obtained through the processing of step (1) is mirror-like, it is left to stand for 1-3min, and after the standing is finished, the molten solution is poured into a metal mold, and the molten solution is solidified to obtain an ingot; ( 3) Carry out homogenization annealing, hot extrusion deformation, solution heat treatment, cold drawing deformation and aging heat treatment on the ingot.
  • step (1) Cu ⁇ 99.95wt% in electrolytic copper; Ni source is electrolytic nickel, and Ni ⁇ 99.96 in electrolytic nickel wt%; Nb source is Cu-Nb master alloy; Mn source is Cu-Mn master alloy; Fe source is Cu-Fe master alloy; Si source is pure silicon, Si ⁇ 99.99wt%; Al source is pure aluminum, Al ⁇ 99.7wt%; Sn source is pure tin, Sn ⁇ 99.99wt%.
  • step (1) in the melting furnace, the molten liquid surface is completely covered by charcoal, and (in the smelting process) pure phosphorus deoxidizer is used Deoxidation; in the pure phosphorus deoxidizer, the content of phosphorus is 99.85%-99.95%; the amount of pure phosphorus deoxidizer is 0.1%-0.5% of the total weight of the melt.
  • step (2) in the melting furnace, the molten liquid surface is completely covered by charcoal, and (in the smelting process) pure phosphorus deoxidizer is used Deoxidation; in the pure phosphorus deoxidizer, the content of phosphorus is 99.85%-99.95%; the amount of pure phosphorus deoxidizer is 0.1%-0.5% of the total weight of the melt.
  • the step of removing slag with the slag removing stick in the melting furnace, the molten liquid surface is completely covered by charcoal, and (in the smelting process) pure phosphorus deoxidizer is used Deoxidation; in the pure phosphorus deoxidizer, the content of
  • the pouring temperature is 1200-1300°C;
  • the step of the electromagnetic field; the current application range of the electromagnetic field is 20-100A.
  • pouring temperature is an important parameter in the melting and casting process of materials. If the pouring temperature is too low, the fluidity of the melt will be poor, and casting defects such as insufficient pouring or shrinkage cavities, holes, and cold shuts will easily occur; On the other hand, the burning of elements will cause the solidification structure to become coarse and the performance will decrease.
  • the strength of the electromagnetic field is mainly controlled by adjusting the magnitude of the current, which mainly affects the magnitude of the stirring force exerted by the electromagnetic field on the melt, and the magnitude of the stirring force has a direct relationship with the extent to which the solidification process breaks the formation of dendrites. Therefore, the intensity of the electromagnetic field is controlled by different currents, thereby affecting the formation and distribution of the Sn-rich ⁇ phase, suppressing the effect of dendrite segregation, and improving the subsequent comprehensive performance of the alloy.
  • the invention improves the segregation of the as-cast solidified structure through the selection of microalloy elements and combined with electromagnetic stirring.
  • the quality of the as-cast structure directly affects the difficulty of subsequent processing links and will affect the comprehensive performance of the final material.
  • the temperature of homogenization annealing is 900-950°C
  • the temperature of hot extrusion deformation is 850-950°C
  • the temperature of solution heat treatment is 900-950°C.
  • the temperature is 750-900°C
  • the cold drawing deformation is 50%-90%
  • the aging heat treatment temperature is 300-500°C.
  • the oil and gas development of this embodiment uses a multi-component Cu-Ni-Sn based alloy, which consists of the following components in weight percentage: Ni 9%, Sn 6%, Si 1.2%, Al 3%, Nb 0.5%, Mn 2.0% , Fe 2.0%, other trace elements O ⁇ 5ppm, S ⁇ 3ppm, P ⁇ 3ppm, and the balance is Cu.
  • Raw material preparation Select 1# electrolytic copper (Cu ⁇ 99.95%), 1# electrolytic nickel (Ni ⁇ 99.96%), pure tin (Sn ⁇ 99.99%), pure silicon produced by Henan Yixin Nonferrous Metal Materials Co., Ltd. (Si ⁇ 99.99%), pure aluminum (Al ⁇ 99.7%), Cu-Nb master alloy, Cu-Mn master alloy, Cu-Fe master alloy, after cutting, drying and surface degreasing treatment, ready for use.
  • the heating and melting process ensure that the melt surface is completely covered by charcoal, and the charcoal covering layer isolates most of the air to realize the melting process in a micro-oxidizing atmosphere.
  • pure phosphorus deoxidizer is used for deoxidation, and the phosphorus content is 99.85% to 99.95. %, the amount of deoxidizer is 0.1% of the total weight of the melt.
  • graphite stirring rods are used for stirring, and slag removing rods are used for removing slag.
  • FIG. 2 The microstructure diagram of the multi-element Cu-Ni-Sn-based alloy used for oil and gas development in this embodiment is shown in FIG. 2 .
  • the multi-element Cu-Ni-Sn based alloy for oil and gas development prepared in this example the composition is uniform, and the as-cast microstructure is smaller than the dendrite spacing of the conventional Cu-15Ni-8Sn alloy; the tensile strength is 1035 MPa, and the elongation is 6.9 %; wear rate 0.09mg/m.
  • the observation of the microstructure adopts common conventional testing methods in the field of materials science and engineering. Firstly, the prepared sample is cut and sampled, polished and corroded, and the microstructure is observed with a Zeiss Axio Vert A1 optical microscope.
  • the oil and gas development of this embodiment uses a multi-component Cu-Ni-Sn based alloy, which consists of the following components in weight percentage: Ni 15%, Sn 8%, Si 0.8%, Al 1.2%, Nb 0.3%, Mn 0.5% , Fe 0.5%, other trace elements O ⁇ 5ppm, S ⁇ 3ppm, P ⁇ 3ppm, and the balance is Cu.
  • Raw material preparation Select 1# electrolytic copper (Cu ⁇ 99.95%), 1# electrolytic nickel (Ni ⁇ 99.96%), pure tin (Sn ⁇ 99.99%), pure silicon produced by Henan Yixin Nonferrous Metal Materials Co., Ltd. (Si ⁇ 99.99%), pure aluminum (Al ⁇ 99.7%), Cu-Nb master alloy, Cu-Mn master alloy, Cu-Fe master alloy, after cutting, drying and surface degreasing treatment, ready for use.
  • the heating and melting process ensure that the melt surface is completely covered by charcoal, and the charcoal covering layer isolates most of the air to realize the melting process in a micro-oxidizing atmosphere.
  • pure phosphorus deoxidizer is used for deoxidation, and the phosphorus content is 99.85% to 99.95. %, the amount of deoxidizer is 0.3% of the total weight of the melt.
  • graphite stirring rods are used for stirring, and slag removing rods are used for removing slag.
  • the metal mold is preheated, and the preheating temperature is 300°C.
  • the homogenization annealing temperature is 920°C
  • the hot extrusion deformation temperature is 900°C
  • the solution heat treatment temperature is 840°C
  • the cold drawing deformation is 70%
  • the aging heat treatment temperature is 420°C.
  • FIG. 3 The microstructure diagram of the multi-element Cu-Ni-Sn-based alloy used for oil and gas development in this embodiment is shown in FIG. 3 .
  • the multi-component Cu-Ni-Sn-based alloy prepared in this example for oil and gas development the composition is uniform, and the as-cast microstructure is smaller than that of the conventional Cu-15Ni-8Sn alloy, the dendrite spacing is smaller, the distribution is more uniform, and the arrangement direction is more consistent;
  • Mechanics and wear resistance test the tensile strength is 1150MPa, the elongation is 4.1%; the wear rate is 0.02mg/m.
  • the oil and gas development of this embodiment uses a multi-component Cu-Ni-Sn based alloy, which consists of the following components in weight percentage: Ni 20%, Sn 12%, Si 0.3%, Al 0.2%, Nb 0.02%, Mn 0.2% , Fe 0.2%, other trace elements O ⁇ 5ppm, S ⁇ 3ppm, P ⁇ 3ppm, and the balance is Cu.
  • Raw material preparation Select 1# electrolytic copper (Cu ⁇ 99.95%), 1# electrolytic nickel (Ni ⁇ 99.96%), pure tin (Sn ⁇ 99.99%), pure silicon produced by Henan Yixin Nonferrous Metal Materials Co., Ltd. (Si ⁇ 99.99%), pure aluminum (Al ⁇ 99.7%), Cu-Nb master alloy, Cu-Mn master alloy, Cu-Fe master alloy, after cutting, drying and surface degreasing treatment, ready for use.
  • the heating and melting process ensure that the melt surface is completely covered by charcoal, and the charcoal covering layer isolates most of the air to realize the melting process in a micro-oxidizing atmosphere.
  • pure phosphorus deoxidizer is used for deoxidation, and the phosphorus content is 99.85% to 99.95. %, the amount of deoxidizer is 0.5% of the total weight of the melt.
  • graphite stirring rods are used for stirring, and slag removing rods are used for removing slag.
  • the homogenization annealing temperature is 950°C
  • the hot extrusion deformation temperature is 950°C
  • the solution heat treatment temperature is 900°C
  • the cold drawing deformation is 90%
  • the aging heat treatment temperature is 500°C.
  • FIG. 4 The microstructure diagram of the multi-element Cu-Ni-Sn-based alloy used for oil and gas development in this embodiment is shown in FIG. 4 .
  • the multi-component Cu-Ni-Sn based alloy for oil and gas development prepared in this example the composition is uniform, and the as-cast microstructure is smaller than the dendrite spacing of the conventional Cu-15Ni-8Sn alloy; the mechanical and wear resistance tests: tensile strength 1092MPa, elongation 5.3%; wear rate 0.06mg/m.
  • the oil and gas development of this embodiment uses a multi-component Cu-Ni-Sn based alloy, which consists of the following components in weight percentage: Ni 7%, Sn 4%, Si 1.2%, Al 3.0%, Nb 0.5%, Mn 2.0% , Fe 0.8%, other trace elements O ⁇ 4ppm, S ⁇ 3ppm, P ⁇ 3ppm, and the balance is Cu.
  • Raw material preparation Select 1# electrolytic copper (Cu ⁇ 99.95%), 1# electrolytic nickel (Ni ⁇ 99.96%), pure tin (Sn ⁇ 99.99%), pure silicon produced by Henan Yixin Nonferrous Metal Materials Co., Ltd. (Si ⁇ 99.99%), pure aluminum (Al ⁇ 99.7%), Cu-Nb master alloy, Cu-Mn master alloy, Cu-Fe master alloy, after cutting, drying and surface degreasing treatment, ready for use.
  • the heating and melting process ensure that the molten liquid surface is completely covered by charcoal, and the charcoal covering layer isolates most of the air to realize the melting process in a micro-oxidizing atmosphere.
  • pure phosphorus deoxidizer is used for deoxidation, and the phosphorus content is 99.85% ⁇ 99.95%, the amount of deoxidizer is 0.5% of the total weight of the melt.
  • graphite stirring rods are used for stirring, and slag removing rods are used for removing slag.
  • the homogenization annealing temperature is 920°C
  • the hot extrusion deformation temperature is 930°C
  • the solution heat treatment temperature is 870°C
  • the cold drawing deformation is 85%
  • the aging heat treatment temperature is 400°C.
  • the multi-element Cu-Ni-Sn-based alloy for oil and gas development prepared in this example the composition is uniform, and the as-cast microstructure is smaller than the dendrite spacing of the conventional Cu-15Ni-8Sn alloy; the tensile strength is 1033 MPa, and the elongation is 7.1%; Wear rate 0.09mg/m.
  • the oil and gas development of this embodiment uses a multi-component Cu-Ni-Sn based alloy, which consists of the following components in weight percentage: Ni 12%, Sn 10%, Si 0.5%, Al 2.4%, Nb 0.08%, Mn 0.8% , Fe 2.0%, other trace elements O ⁇ 5ppm, S ⁇ 3ppm, P ⁇ 3ppm, and the balance is Cu.
  • Raw material preparation Select 1# electrolytic copper (Cu ⁇ 99.95%), 1# electrolytic nickel (Ni ⁇ 99.96%), pure tin (Sn ⁇ 99.99%), pure silicon produced by Henan Yixin Nonferrous Metal Materials Co., Ltd. (Si ⁇ 99.99%), pure aluminum (Al ⁇ 99.7%), Cu-Nb master alloy, Cu-Mn master alloy, Cu-Fe master alloy, after cutting, drying and surface degreasing treatment, ready for use.
  • the heating and melting process ensure that the molten liquid surface is completely covered by charcoal, and the charcoal covering layer isolates most of the air to realize the melting process in a micro-oxidizing atmosphere.
  • pure phosphorus deoxidizer is used for deoxidation, and the phosphorus content is 99.85% ⁇ 99.95%, the amount of deoxidizer is 0.4% of the total weight of the melt.
  • graphite stirring rods are used for stirring, and slag removing rods are used for removing slag.
  • the homogenization annealing temperature is 900°C
  • the hot extrusion deformation temperature is 920°C
  • the solution heat treatment temperature is 840°C
  • the cold drawing deformation is 80%
  • the aging heat treatment temperature is 420°C.
  • the multi-element Cu-Ni-Sn-based alloy prepared in this example for oil and gas development the composition is uniform, and the as-cast microstructure is smaller than the dendrite spacing of the conventional Cu-15Ni-8Sn alloy; the tensile strength is 1148MPa, and the elongation is 4.5%; Wear rate 0.03mg/m.
  • the oil and gas development of this embodiment uses a multi-component Cu-Ni-Sn based alloy, which consists of the following components in weight percentage: Ni 20%, Sn 4%, Si 0.3%, Al 0.2%, Nb 0.02%, Mn 0.2% , Fe 0.2%, other trace elements O ⁇ 4ppm, S ⁇ 3ppm, P ⁇ 3ppm, and the balance is Cu.
  • Raw material preparation Select 1# electrolytic copper (Cu ⁇ 99.95%), 1# electrolytic nickel (Ni ⁇ 99.96%), pure tin (Sn ⁇ 99.99%), pure silicon produced by Henan Yixin Nonferrous Metal Materials Co., Ltd. (Si ⁇ 99.99%), pure aluminum (Al ⁇ 99.7%), Cu-Nb master alloy, Cu-Mn master alloy, Cu-Fe master alloy, after cutting, drying and surface degreasing treatment, ready for use.
  • the heating and melting process ensure that the melt surface is completely covered by charcoal, and the charcoal covering layer isolates most of the air to realize the melting process in a micro-oxidizing atmosphere.
  • pure phosphorus deoxidizer is used for deoxidation, and the phosphorus content is 99.85% to 99.95. %, the amount of deoxidizer is 0.5% of the total weight of the melt.
  • graphite stirring rods are used for stirring, and slag removing rods are used for removing slag.
  • the homogenization annealing temperature is 910°C
  • the hot extrusion deformation temperature is 900°C
  • the solution heat treatment temperature is 830°C
  • the cold drawing deformation is 75%
  • the aging heat treatment temperature is 370°C.
  • the multi-element Cu-Ni-Sn-based alloy for oil and gas development prepared in this example the composition is uniform, and the as-cast microstructure is smaller than the dendrite spacing of the conventional Cu-15Ni-8Sn alloy; the tensile strength is 1076MPa, and the elongation is 4.9%; Wear rate 0.05mg/m.
  • the conventional Cu-15Ni-8Sn alloy of this comparative example consists of the following components in weight percentage: Ni 15% and Sn 8%, and the balance is Cu.
  • the conventional Cu-15Ni-8Sn alloy of this comparative example is prepared by a method comprising the following steps:
  • Electrolytic copper Cu ⁇ 99.95%), electrolytic nickel (Ni ⁇ 99.96%), and pure tin (Sn ⁇ 99.99%) are melted in a non-vacuum melting furnace. No addition of Al, Nb, Mn, Fe, etc. during the melting process is conducive to improvement Alloying elements for solidification structure segregation and performance; at the same time, the control range for other trace elements O, S, and P is relatively wide. Generally, the O content is greater than 10ppm, the S content is greater than 8ppm, and the P content is greater than 8ppm.
  • the melt After the melt is completely melted, it is directly poured into the metal mold without applying electromagnetic field stirring, and the ingot is obtained through cooling and solidification; then subsequent homogenization annealing ⁇ hot extrusion deformation ⁇ solution heat treatment ⁇ cold drawing Deformation ⁇ aging heat treatment. Due to the serious segregation problem in the solidification structure of the conventional process in the melting and casting stage, the subsequent deformation is more difficult and the yield of the material is reduced.
  • the homogenization annealing temperature is 950°C
  • the hot extrusion deformation temperature is 950°C
  • the solution heat treatment temperature is 900°C
  • the cold drawing deformation 90%
  • the aging heat treatment temperature is 500°C.
  • Example 1 The difference between this comparative example and Example 1 is only that the addition amount of Si element is: 0.28% (less than 0.3%), and the rest are consistent with Example 1.
  • Example 2 The difference between this comparative example and Example 2 is only that the addition amount of Al element is: 0.19% (less than 0.2%), and the rest are consistent with Example 2.
  • Example 3 The difference between this comparative example and Example 3 is only that the addition amount of Nb element is: 0.017% (less than 0.02%), and the rest are consistent with Example 3.
  • Example 4 The difference between this comparative example and Example 4 is only that the addition amount of Mn element is: 0.18% (less than 0.2%), and the rest are consistent with Example 4.
  • Example 5 The difference between this comparative example and Example 5 is only that the addition amount of Fe element is: 0.19% (less than 0.2%), and the rest are consistent with Example 5.
  • the test method of tensile strength is: use SHIMADZU (Shimadzu) AG-I250KN precision universal testing machine to carry out tensile test, the tensile rate is 1mm/min, and obtain the stress-strain curve and tensile strength value of the alloy.
  • the test method of elongation is: use SHIMADZU (Shimadzu) AG-I250KN precision universal testing machine to carry out the tensile test, the tensile rate is 1mm/min, obtain the stress-strain curve of the alloy, and measure the alloy before and after stretching by the extensometer Changes in the gauge length to obtain the elongation value.
  • the test method of the wear rate is: using a pin-on-disk friction and wear testing machine, by applying different loads and speeds, the prepared alloy is used as a pin sample, and the dry friction and wear test is carried out with the auxiliary disc.
  • the friction and wear test is carried out for a certain period of time Or after a certain distance, measure the quality damage of the alloy pin sample before and after friction and wear, and then calculate the wear rate.
  • Example 1 1035 6.9 0.09
  • Example 2 1150 4.1 0.02
  • Example 3 1092 5.3 0.06
  • Example 4 1033 7.1 0.09
  • Example 5 1148 4.5 0.03
  • Example 6 1076 4.9 0.05 Comparative example 1 1007 7.2 0.13 Comparative example 2 984 8.7 0.17 Comparative example 3 981 8.9 0.18
  • Comparative example 4 973 9.2 0.27 Comparative example 5 987 8.6 0.25 Comparative example 6 986 8.6 0.28 Comparative example 7 995 2.1 0.15
  • the multi-component Cu-Ni-Sn-based alloy for oil and gas development of the present invention has better tensile strength and significantly lower wear rate than the conventional Cu-15Ni-8Sn alloy, and is suitable for Used in key components of oil and gas extraction.
  • the Nb element can promote the alloy's amplitude modulation decomposition process, improve the alloy's ability to resist recovery and recrystallization softening, and form a Nb-rich ⁇ phase in the grain and grain boundary, which can be significantly inhibited during the aging heat treatment process. Grain growth and the formation of discontinuous precipitation improve the strength and wear resistance of the alloy. If the content of Nb element is too low (less than 0.02%), the strength and wear resistance of the alloy will be weakened.
  • the Mn element can refine the as-cast grain structure, increase the peak age hardening strength of the alloy, inhibit the grain boundary reaction and grain coarsening, and significantly improve the alloy strength and wear resistance. If the Mn element If the content is too low (less than 0.2%), it will lead to coarse grains in the as-cast structure and weaken the strength and wear resistance of the alloy.
  • the present invention adds silicon (Si), silicon (Si), Aluminum (Al), niobium (Nb), manganese (Mn), iron (Fe) and other alloying elements, under the synergistic effect of various elements, while maintaining good elongation (elongation ⁇ 3%), Synergistically improves the strength and wear resistance of the alloy: the tensile strength is ⁇ 1000MPa, and the wear rate is ⁇ 0.1mg/m, which can meet the requirements of the comprehensive performance of the alloy in the field of oil and gas exploitation.
  • the addition of the above alloying elements effectively inhibits the segregation of the solidified structure and refines the grains of the as-cast structure, which is more conducive to the subsequent hot extrusion deformation and heat treatment strengthening effect.

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Abstract

Alliage à éléments multiples à base de Cu-Ni-Sn pour l'exploitation de pétrole et de gaz et son procédé de préparation. L'alliage à éléments multiples à base de Cu-Ni-Sn pour l'exploitation de pétrole et de gaz comprend les composants suivants en teneur en pourcentage : de 7 à 20 % de Ni, de 4 à 12 % de Sn, de 0,3 à 1,2 % de Si, de 0,2 à 3,0 % d'Al, de 0,02 à 0,5 % de Nb, de 0,2 à 2,0 % de Mn, de 0,2 à 2,0 % de Fe, le reste étant du Cu. Les composants d'alliage de l'alliage à éléments multiples à base de Cu-Ni-Sn pour l'exploitation de pétrole et de gaz sont uniformes ; les cristaux dendritiques d'une microstructure à l'état brut de coulée ont un espacement plus étroit, une distribution plus uniforme et des directions de distribution plus cohérentes ; et l'alliage présente de bonnes propriétés mécaniques et une bonne résistance à l'usure, et est particulièrement approprié pour une utilisation dans des composants clés pour l'exploitation de pétrole et de gaz.
PCT/CN2022/135122 2022-11-23 2022-11-29 Alliage à éléments multiples à base de cu-ni-sn pour l'exploitation de pétrole et de gaz et son procédé de préparation WO2023165187A1 (fr)

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