CN115404383B - High-strength nickel-based alloy wire for nuclear power, manufacturing method and application - Google Patents
High-strength nickel-based alloy wire for nuclear power, manufacturing method and application Download PDFInfo
- Publication number
- CN115404383B CN115404383B CN202110592180.7A CN202110592180A CN115404383B CN 115404383 B CN115404383 B CN 115404383B CN 202110592180 A CN202110592180 A CN 202110592180A CN 115404383 B CN115404383 B CN 115404383B
- Authority
- CN
- China
- Prior art keywords
- wire
- nuclear power
- temperature
- smelting
- alloy wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/045—Manufacture of wire or bars with particular section or properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
- B21C37/047—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- 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
- C22C1/023—Alloys based on nickel
-
- 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
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a high-strength nickel-based alloy wire for nuclear power, which comprises the following chemical components in percentage by weight: c:0.02-0.06; cr:16.0-19.0; mo:1.8-2.5; w:1.0-2.0; al:0.2-0.8; ti:1.2-1.7; nb:4.0 to 4.6; b is less than or equal to 0.002; mg:0.002-0.003; p:0.010-0.020; fe:16.0-18.0; the balance being nickel and unavoidable impurities; the diameter of the wire is
Description
Technical Field
The invention relates to the related technical field of manufacturing high-strength nickel-based alloy for nuclear power spring wires, in particular to a deformable superalloy wire capable of bearing higher stress and relaxation resistance at a service temperature of more than 350 ℃ and a manufacturing method thereof.
Background
A nuclear reactor is the core of a nuclear power plant, known as the "heart" of the nuclear power plant. Compression springs for nuclear reactors, and wires for their related component springs, are subject to high temperatures (greater than 350 ℃) and high pressures (greater than 17 MPa) for long periods of time, corrosion by reactor coolant, etc., and therefore, impose overall performance requirements on the wires for springs: the material has high temperature resistance, high pressure resistance, enough toughness, plasticity, corrosion resistance and the like. At present, the spring component of the domestic nuclear reactor is mostly prepared from nickel-based deformed superalloy wires. The nickel-based superalloy wire must be prepared by adopting a cold drawing process, and the nickel-based alloy has extremely high strain strengthening coefficient, which results in extremely high difficulty in wire preparation. Therefore, the current domestic nuclear power wire is greatly imported, and the purchasing cost is extremely high. In order to further reduce the manufacturing cost and reduce the import dependence, development of a novel high-strength nickel-based alloy wire is imperative.
Patent document CN 105483448A describes a method for preparing a nickel-base superalloy GH4145 wire for nuclear use, the composition of which is controlled in table 1 below. The manufacturing method mainly emphasizes that the whole manufacturing process is free of acid washing, and meets the nuclear power requirement. However, the GH4145 alloy wire prepared by the method has low strength and can not meet the requirements of the wire for nuclear power of new generation.
Patent document CN 106636848A describes a method for preparing a wear-resistant corrosion-resistant nickel-base alloy wire, the composition of which is controlled in the following table 1. The wire has good high-temperature oxidation resistance, corrosion resistance and higher strength, and can be applied to the fields of aeroengines, gas turbines and the like. However, since the alloy contains noble metal elements such as Co, ta, re, etc., the production cost is extremely high, and the alloy is not economical. The alloy contains higher B element, which can cause neutron attenuation of nuclear fuel, so that the alloy is not suitable for the nuclear power field.
The comparison of the components of the above patent document and the present invention is shown in Table 1.
Table 1 search for alloy Components in patents and alloy Components (wt%) of the present invention
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide the high-strength nickel-based alloy wire for nuclear power.
The invention also provides a manufacturing method of the wire. Also provides application of the high-strength nickel-based alloy wire.
The technical scheme of the invention is that the high-strength nickel-based alloy wire for nuclear power comprises the following chemical components in percentage by weight:
c:0.02-0.06; cr:16.0-19.0; mo:1.8-2.5; w:1.0-2.0; al:0.2-0.8; ti:1.2-1.7; nb:4.0 to 4.6; b is less than or equal to 0.002; mg:0.002-0.003; p:0.010-0.020; fe:16.0-18.0; the balance being nickel and unavoidable impurities; the diameter of the wire is
Preferably, the diameter of the high-strength nickel-based alloy wire is
The reason why the alloy of the invention selects the chemical composition range is as follows:
C：0.02-0.06％
c is an essential element for carbide formation in nickel-base superalloys. C content lower than 0.02 results in less carbide, is unfavorable for grain structure refinement and performance, and is unfavorable for vacuum smelting deoxidation. An excessive carbide formation with a C content of more than 0.06 causes excessive inclusion and segregation tendency, resulting in uneven grains and deteriorated alloy plasticity.
Cr：16.0-19.0％
The addition amount of Cr element considers two factors, namely ensuring the formation of a single-phase austenitic solid solution, and considering the high-temperature oxidation corrosion resistance, wherein Cr is one of the most effective elements for improving the oxidation of the alloy. The content of Cr is controlled to be 16.0-19.0% by comprehensive consideration.
Mo：1.8-2.5％
Mo is a strong dissolution strengthening element, on one hand, a proper amount of Mo element can be completely dissolved into a single-phase austenite matrix to strengthen the matrix, and on the other hand, the corrosion resistance and the high-temperature stability can be improved. However, too high a Mo content may result in increased steel segregation, reducing forging plasticity. The Mo content is controlled to 1.8-2.5% by comprehensive consideration.
W：1.0-2.0％
The addition of the W element is a large bright spot of the component, especially W, mo composite addition, and the solid solution strengthening effect is better than that of simply increasing the Mo content. In addition, W is used for replacing Mo, so that the defect that Mo element forms gas oxide at high temperature is effectively avoided on the premise of ensuring the mechanical property of the alloy, and the high-temperature oxidation resistance of the alloy is improved.
Al：0.2-0.8％
Al is an essential forming element of the gamma '-phase and gamma' -phase in nickel-base alloys and is the two most important strengthening phases in nickel-base alloys. By controlling proper aluminum element, gamma '/gamma ' coated structure or gamma ' particle with higher stability can be separated out, so that no obvious softening is generated when the temperature is slightly higher than 650 ℃, and the product has good physical and chemical properties and high-temperature strength. The higher the Al content, the larger the precipitation amount of gamma' phase, but the too high Al increases the difficulty of alloy hot working, so that the material is easy to crack. So that Al is controlled to 0.2-0.8%.
Ti：1.2-1.7％
Ti in the alloy is very easy to dissolve in gamma' phase and can replace two thirds of Al atoms. After Ti enters gamma ', the precipitation of gamma' is slowed down, and the overaging effect is effectively prevented, so that the alloy is suitable for long-term use in a high-temperature working environment. However, excessive addition of Ti produces Ni 3 Ti (eta phase), and Ni 3 The Ti phase has no age hardening capacity, and the Ti content of the alloy is controlled in the range of Ti:1.2 to 1.7 percent.
Nb：4.0-4.6％
Nb content is added as a bright spot of the invention. Higher Nb can form gamma-strengthening phase with Ni, so that the strength of the alloy is obviously improved, and in addition, slightly higher Nb can improve the high-temperature stability of the material. However, since the specific gravity of Nb is large, nb is excessively added, and segregation is easily formed in the smelting process, such as generation of metallurgical defects such as black specks. The Nb content of the alloy is controlled to be 4.0-4.6 percent.
Fe：16.0-18.0％
And a proper amount of Fe is added, part of Ni can be replaced, and the alloy cost can be obviously reduced on the premise of not obviously influencing the performance of the alloy. The content of Fe element is controlled to be 16.0-18.0% by comprehensive consideration.
B：≤0.002％
The control of the B element is a big bright point of the invention. Studies have shown that element B has a very adverse effect on neutron attenuation in nuclear fuels. Therefore, the content of B element must be strictly controlled, but B is not more than 0.002% in terms of production economy.
Mg：0.002-0.003％
The Mg element can be biased to a grain boundary and combined with the S element, so that the effect of purifying the grain boundary is achieved, the grain boundary strength is improved, and the high-temperature thermoplastic of the alloy is improved. However, too much Mg element may cause formation of a low melting point detrimental phase in the alloy, deteriorating the alloy thermoplasticity. Comprehensively considering that the content of Mg element is controlled to be 0.002-0.003 percent.
P：0.010-0.020％
The addition of the P trace elements can improve the stability of grain boundaries at high temperature and can obviously improve the high-temperature durability and creep life of the alloy, but excessive P can deteriorate the hot processing performance of the alloy and easily cause microscopic segregation. Comprehensively considering that the content of the P element is controlled to be 0.010-0.020 percent.
According to the high-strength nickel-based alloy wire for nuclear power, the contents of W and Mo are preferably as follows: W+Mo is more than 2.8 and less than 4.
According to the high-strength nickel-based alloy wire for nuclear power, the three elements Al, ti and Nb preferably meet the following conditions: al+Ti+Nb is more than 6.0 and less than 7.0; al/(Ti+Nb) < 0.06 < 0.10.
The alloy composition design of the invention is characterized in that: 1) The alloy component proportion is optimized, and the oxidation corrosion resistance of the alloy is improved while the optimal solid solution strengthening effect is achieved through the interaction of the two elements by the composite addition of Mo and W. Wherein, the content of the two elements is required to be more than 2.8 and less than 4. 2) The Al, ti and Nb elements are gamma '/gamma' phase forming elements, and the invention ensures that two strengthening phases of gamma ', gamma' are simultaneously separated out from the alloy by optimizing the content and the proportion of the Al, ti and Nb elements. On the premise of ensuring that certain toughness is obtained, the alloy has good processing performance so as to facilitate the subsequent cold drawing wire making. To obtain the desired effect, the addition of three elements requires that the following two conditions be satisfied simultaneously: al+Ti+Nb is more than 6.0 and less than 7.0; al/(Ti+Nb) < 0.06 < 0.10. 3) Trace element optimization control: preferably, the content of the trace element Mg is controlled to be 0.002-0.003, so that the optimal effect of strengthening the grain boundary is realized. The P element is controlled between 0.010 and 0.020 percent, and the optimal high-temperature durability and creep life are obtained. In addition, the content of B is controlled below 0.002, so that the influence on the nuclear fuel is reduced.
The invention also provides a manufacturing method of the high-strength nickel-based alloy wire for nuclear power, which comprises vacuum induction smelting, electrode casting, electroslag remelting smelting, forging into a blank, hot rolling a coil, solution treatment, cold drawing process and heat treatment,
1) Vacuum induction smelting process:
firstly, adding Ni, cr, mo, W main materials, simultaneously adding C, carrying out vacuum smelting, and degassing by utilizing a C-O reaction to ensure that the O, H content in molten steel is reduced to the control requirement; after the main materials are completely cleaned, adding Al, ti and Nb alloying elements; taking a finished product sample for component analysis, filling Ar gas after the content of main element meets the index requirement, adding Mg element, tapping and pouring an electrode after smelting for 5-10min, wherein the tapping temperature is 1450-1470 ℃;
2) Electroslag remelting smelting process:
grinding the surface of the induction electrode, smelting the shrinkage cavity of the electrode head downwards, setting the smelting speed at 2.0-4.0Kg/min, and controlling the power to be 100-150KW;
3) Forging process
The heating temperature of the steel ingot is 1100-1130 ℃, during the forging process, the steel ingot is upset once, the upsetting is carried out to 0.5-0.7 of the original height, the forging temperature is not less than 1050 ℃, the final forging temperature is not less than 950 ℃, and the blank is forged to the required specification;
the upsetting of the steel ingot can increase the forging ratio and improve the uniformity of steel;
4) The rolling process comprises the following steps:
in the hot rolling process, the heating temperature of the blank is controlled to be 1100-1130 ℃, the initial rolling temperature is 1060-1100 ℃, and the final rolling temperature is 900-950 ℃;
5) And (3) a solid solution process:
carrying out solution treatment on the alloy blank before cold drawing, wherein the solution treatment process is 1000-1050 ℃, and air cooling is carried out;
thus, the alloy can be ensured to be in a soft state, so that the alloy is favorable for cold drawing and processing into a finished wire;
6) Cold drawing: drawing the wire rod into a finished wire rod;
7) And (3) heat treatment:
the cold drawn wire is subjected to aging heat treatment according to the following process:
aging temperature: preserving heat for 6-9h at 710-750 ℃, cooling to 610-650 ℃, preserving heat for 6-9h, and air cooling.
In this way, the aging treatment can separate out a certain amount of strengthening phases with certain sizes, and the strength of the alloy wire is improved.
According to the manufacturing method of the high-strength nickel-based alloy wire for nuclear power, the argon pressure in the step 1) is preferably 9000-13000Pa.
Further, the argon pressure in the step 1) is 9000-11000Pa.
The main material smelting in the step 1) is high-vacuum and high-power smelting.
According to the method for manufacturing the high-strength nickel-base alloy wire for nuclear power, in the heat treatment of the step 7), the cooling is preferably furnace cooling.
Further, the cooling speed of the furnace cooling is 40-60 ℃/h.
The invention also provides application of the high-strength nickel-based alloy wire in nuclear power, especially nuclear reactor.
The invention provides a high-strength nickel-based alloy wire for nuclear power, which has the highest use temperature of 650 ℃, and can be used for a long time in a high-temperature high-pressure corrosion environment at 350 ℃/17 MPa. The alloy wire (cold drawing + aging state) can reach the following indexes: the room temperature tensile strength is more than or equal to 1550MPa, and the elongation is more than or equal to 5%; the tensile strength at 350 ℃ is more than or equal to 1380MPa; the room temperature torsion is more than or equal to 5 times, and the components such as a nuclear reactor compression spring, a spring wire and the like can be satisfied. The successful development of the alloy can meet the use requirement of key materials for nuclear power in China, and lays a foundation for the autonomous and domestic development of nuclear power technology in China.
The alloy wire prepared by the chemical composition, the production process and the heat treatment method provided by the technology has the performance reaching the expected index through detection, is hopeful to be applied to a new generation of nuclear power plate spring assembly, and solves the problem of nuclear power key materials.
Drawings
Fig. 1 is a photograph of the grain structure of the finished wire (solid solution state).
Detailed Description
The chemical composition and production method designed according to the present invention produced 5-furnace alloy wires, the specific composition of the alloy is shown in table 2. The grains of the finished wire after heat treatment are finer than 7 grades, and the tissue photograph is shown in figure 1. The mechanical property index reaches the expected target, and the actual detection result is shown in Table 3.
Example 1:
(1) The vacuum induction smelting process comprises the following steps:
firstly, adding main materials such as Ni, cr, mo, W and the like, simultaneously adding C, carrying out high-vacuum and high-power smelting, and degassing by utilizing a C-O reaction to ensure that the O, H content in molten steel is reduced to the control requirement. After the main materials are completely cleaned, alloying elements such as Al, ti, nb and the like are added. Taking a finished product sample for component analysis, filling Ar gas when the main element content meets the index requirement, adding Mg element under 10000Pa, smelting for 5-10min, tapping and pouring an electrode, wherein the tapping temperature is 1450 ℃.
(2) Electroslag remelting smelting process:
the surface of the induction electrode is ground cleanly, shrinkage holes at the head of the electrode are smelted downwards, the smelting speed is set at 2.5Kg/min, and the power is controlled to be 100KW.
(3) Forging process
The steel ingot heating temperature is 1100 ℃, during the forging process, the steel ingot is upset once, and the upsetting is carried out to 0.6 of the original height, so that the forging ratio is increased, and the uniformity of the steel is improved. The forging temperature is equal to or higher than 1050 ℃, the final forging temperature is equal to or higher than 950 ℃, and the blank is forged to the required specification.
(4) The rolling process comprises the following steps:
the blank heating temperature is controlled at 1100 ℃, the initial rolling temperature is 1070 ℃, and the final rolling temperature is 910 ℃.
(5) And (3) a solid solution process:
and (3) carrying out solution treatment on the alloy blank before cold drawing, wherein the solution treatment process is 1020 ℃, and air cooling is carried out, so that the alloy is ensured to be in a soft state, and the cold drawing is facilitated to be processed into a finished wire.
(6) Cold drawing process: drawing the wire rod into a diameter according to a conventional processAnd (5) a wire material.
(7) And (3) heat treatment of the wire: aging temperature: preserving heat at 750 ℃ for 6 hours, furnace cooling to 650 ℃ for 8 hours, and air cooling; the cooling rate of the furnace cooling is 50 ℃/h.
Example 2:
(1) The vacuum induction smelting process comprises the following steps:
firstly, adding main materials such as Ni, cr, mo, W and the like, simultaneously adding C, carrying out high-vacuum and high-power smelting, and degassing by utilizing a C-O reaction to ensure that the O, H content in molten steel is reduced to the control requirement. After the main materials are completely cleaned, alloying elements such as Al, ti, nb and the like are added. Taking a finished product sample for component analysis, filling Ar gas after the content of main elements meets the index requirement, adding Mg element under 11000Pa, tapping and pouring an electrode after smelting for 5-10min, wherein the tapping temperature is 1460 ℃.
(2) Electroslag remelting smelting process:
the surface of the induction electrode is ground cleanly, shrinkage holes at the head of the electrode are smelted downwards, the smelting speed is set at 3.0Kg/min, and the power is controlled to 120KW.
(3) Forging process
The steel ingot heating temperature is 1120 ℃, during the forging process, the steel ingot is upset once, and the upsetting is 0.5 of the original height, so that the forging ratio is increased, and the uniformity of the steel is improved. The forging temperature is equal to or higher than 1050 ℃, the final forging temperature is equal to or higher than 950 ℃, and the blank is forged to the required specification.
(4) The rolling process comprises the following steps:
the blank heating temperature is controlled at 1120 ℃, the initial rolling temperature is 1080 ℃, and the final rolling temperature is 910 ℃.
(5) And (3) a solid solution process:
and (3) carrying out solution treatment on the alloy blank before cold drawing, wherein the solution treatment process is 1010 ℃, and air cooling is carried out, so that the alloy is ensured to be in a soft state, and the cold drawing is facilitated to be processed into a finished wire.
(6) Cold drawing toolThe process comprises the following steps: drawing the wire rod into a diameter according to a conventional processAnd (5) a wire material.
(7) And (3) heat treatment of the wire: aging temperature: preserving heat for 9h at 730 ℃ and furnace cooling to 620 ℃ for 7h, and air cooling; the cooling rate of the furnace cooling is 55 ℃/h.
Example 3:
(1) The vacuum induction smelting process comprises the following steps:
firstly, adding main materials such as Ni, cr, mo, W and the like, simultaneously adding C, carrying out high-vacuum and high-power smelting, and degassing by utilizing a C-O reaction to ensure that the O, H content in molten steel is reduced to the control requirement. After the main materials are completely cleaned, alloying elements such as Al, ti, nb and the like are added. Taking a finished product sample for component analysis, filling Ar gas after the content of main elements meets the index requirement, adding Mg element under 13000Pa, tapping and pouring an electrode after smelting for 5-10min, wherein the tapping temperature is 1460 ℃.
(2) Electroslag remelting smelting process:
the surface of the induction electrode is ground cleanly, shrinkage holes at the head of the electrode are smelted downwards, the smelting speed is set at 3.5Kg/min, and the power is controlled to 140KW.
(3) Forging process
The steel ingot heating temperature is 1110 ℃, during the forging process, the steel ingot is upset once, and the upsetting is 0.7 of the original height, so that the forging ratio is increased, and the uniformity of the steel is improved. The forging temperature is equal to or higher than 1050 ℃, the final forging temperature is equal to or higher than 950 ℃, and the blank is forged to the required specification.
(4) The rolling process comprises the following steps:
the blank heating temperature is controlled at 1110 ℃, the initial rolling temperature is 1060 ℃, and the final rolling temperature is 910 ℃.
(5) And (3) a solid solution process:
and (3) carrying out solution treatment on the alloy blank before cold drawing, wherein the solution treatment process is 1040 ℃, and air cooling is carried out, so that the alloy is ensured to be in a soft state, and the cold drawing is facilitated to be processed into a finished wire.
(6) Cold drawing process: drawing the wire rod into a diameter according to a conventional processAnd (5) a wire material.
(7) And (3) heat treatment of the wire: aging temperature: preserving heat at 750 ℃ for 8 hours, furnace cooling to 620 ℃ for 9 hours, and air cooling; the cooling rate of the furnace cooling is 60 ℃/h.
Example 4:
(1) The vacuum induction smelting process comprises the following steps:
firstly, adding main materials such as Ni, cr, mo, W and the like, simultaneously adding C, carrying out high-vacuum and high-power smelting, and degassing by utilizing a C-O reaction to ensure that the O, H content in molten steel is reduced to the control requirement. After the main materials are completely cleaned, alloying elements such as Al, ti, nb and the like are added. Taking a finished product sample for component analysis, filling Ar gas after the content of main elements meets the index requirement, adding Mg element under 11000Pa, tapping and pouring an electrode after smelting for 5-10min, wherein the tapping temperature is 1455 ℃.
(2) Electroslag remelting smelting process:
the surface of the induction electrode is ground cleanly, shrinkage holes at the head of the electrode are smelted downwards, the smelting speed is set at 3.5Kg/min, and the power is controlled to 140KW.
(3) Forging process
The steel ingot heating temperature is 1130 ℃, during the forging process, the steel ingot is upset once, and the upset is 0.5 of the original height, so that the forging ratio is increased, and the uniformity of the steel is improved. The forging temperature is equal to or higher than 1050 ℃, the final forging temperature is equal to or higher than 950 ℃, and the blank is forged to the required specification.
(4) The rolling process comprises the following steps:
the blank heating temperature is controlled at 1130 ℃, the initial rolling temperature is 1080 ℃, and the final rolling temperature is 920 ℃.
(5) And (3) a solid solution process:
and (3) carrying out solution treatment on the alloy blank before cold drawing, wherein the solution treatment process is 1030 ℃, and air cooling is carried out, so that the alloy is ensured to be in a soft state, and the cold drawing is facilitated to be processed into a finished wire.
(6) Cold drawing process: drawing the wire rod into a diameter according to a conventional processAnd (5) a wire material.
(7) And (3) heat treatment of the wire: aging temperature: preserving heat for 7h at 720 ℃ and cooling to 630 ℃ for 8h, and cooling in air; the cooling rate of the furnace cooling is 45 ℃/h.
Example 5:
(1) The vacuum induction smelting process comprises the following steps:
firstly, adding main materials such as Ni, cr, mo, W and the like, simultaneously adding C, carrying out high-vacuum and high-power smelting, and degassing by utilizing a C-O reaction to ensure that the O, H content in molten steel is reduced to the control requirement. After the main materials are completely cleaned, alloying elements such as Al, ti, nb and the like are added. Taking a finished product sample for component analysis, filling Ar gas after the content of main elements meets the index requirement, adding Mg element under the pressure of 12000Pa, tapping and pouring an electrode after smelting for 5-10min, wherein the tapping temperature is 1455 ℃.
(2) Electroslag remelting smelting process:
the surface of the induction electrode is ground cleanly, shrinkage holes at the head of the electrode are smelted downwards, the smelting speed is set at 3.0Kg/min, and the power is controlled to 120KW.
(3) Forging process
The steel ingot heating temperature is 1130 ℃, during the forging process, the steel ingot is upset once, and the upset is 0.6 of the original height, so that the forging ratio is increased, and the uniformity of the steel is improved. The forging temperature is equal to or higher than 1050 ℃, the final forging temperature is equal to or higher than 950 ℃, and the blank is forged to the required specification.
(4) The rolling process comprises the following steps:
the blank heating temperature is controlled at 1130 ℃, the initial rolling temperature is 1080 ℃, and the final rolling temperature is 920 ℃.
(5) And (3) a solid solution process:
and (3) carrying out solution treatment on the alloy blank before cold drawing, wherein the solution treatment process is 1040 ℃, and air cooling is carried out, so that the alloy is ensured to be in a soft state, and the cold drawing is facilitated to be processed into a finished wire.
(6) Cold drawing process: drawing the wire rod into a diameter according to a conventional processAnd (5) a wire material.
(7) And (3) heat treatment of the wire: aging temperature: preserving heat for 6h at 710 ℃ and cooling to 610 ℃ for 6h in a furnace, and cooling in air; the cooling rate of the furnace cooling is 55 ℃/h.
TABLE 2 chemical compositions, wt%, of the alloys of the present invention
TABLE 3 mechanical properties test results of the alloys of the present invention
The invention provides a high-strength nickel-based alloy wire for nuclear power and a manufacturing method thereof, and the alloy can be used for a long time under the high-temperature and high-pressure corrosion environment of 350 ℃ and 17 MPa.
Claims (8)
1. The utility model provides a nuclear power is with high strength nickel base alloy wire material which characterized in that: the alloy comprises the following chemical components in percentage by weight:
c:0.02-0.06; cr:16.0-19.0; mo:1.8-2.5; w:1.0-2.0; al:0.2-0.8; ti:1.2-1.7; nb:4.0 to 4.6; b is less than or equal to 0.002; mg:0.002-0.003; p:0.010-0.020; fe:16.0-18.0; the balance being nickel and unavoidable impurities; the diameter of the wire is phi 3 mm-phi 10mm; the three elements Al, ti and Nb meet the following conditions: al+Ti+Nb is more than 6.0 and less than 7.0; al/(Ti+Nb) < 0.06 < 0.10; the contents of W and Mo satisfy the following conditions: W+Mo is more than 2.8 and less than 4.
2. The nuclear power high strength nickel-based alloy wire according to claim 1, wherein: the diameter of the wire is phi 4 mm-phi 7mm.
3. The method for manufacturing the high-strength nickel-base alloy wire for nuclear power according to claim 1, comprising the steps of vacuum induction smelting, electrode casting, electroslag remelting smelting, forging into a blank, hot rolling a coil, solution treatment, cold drawing process and heat treatment, and is characterized in that:
1) The vacuum induction smelting process comprises the following steps:
firstly, adding Ni, cr, mo, W main materials, simultaneously adding C, carrying out vacuum smelting, and degassing by utilizing a C-O reaction to ensure that the O, H content in molten steel is reduced to the control requirement; after the main materials are completely cleaned, adding Al, ti and Nb alloying elements; taking a finished product sample for component analysis, filling Ar gas after the content of main element meets the index requirement, adding Mg element, tapping and pouring an electrode after smelting for 5-10min, wherein the tapping temperature is 1450-1470 ℃;
2) Electroslag remelting smelting process:
the surface of the induction electrode is ground cleanly, shrinkage holes at the head of the electrode are smelted downwards, the smelting speed is set to be 2.0-4.0kg/min, and the power is controlled to be 100-150kW;
3) Forging process
The steel ingot heating temperature is 1100-1130 ℃, during the forging process, the steel ingot is upset once, the upsetting is carried out to 0.5-0.7 of the original height, the forging temperature is more than or equal to 1050 ℃, the final forging temperature is more than or equal to 950 ℃, and the blank is forged to the required specification;
4) The rolling process comprises the following steps:
in the hot rolling process, the heating temperature of the blank is controlled to be 1100-1130 ℃, the initial rolling temperature is 1060-1100 ℃, and the final rolling temperature is 900-950 ℃;
5) And (3) a solid solution process:
carrying out solution treatment on the alloy blank before cold drawing, wherein the solution treatment process is 1000-1050 ℃, and air cooling is carried out;
6) Cold drawing: drawing the wire rod into a finished wire rod;
7) And (3) heat treatment:
the cold drawn wire is subjected to aging heat treatment according to the following process:
aging temperature: preserving heat at 710-750deg.C for 6-9h, cooling to 610-650deg.C for 6-9h, and air cooling.
4. The method for manufacturing the high-strength nickel-based alloy wire for nuclear power according to claim 3, wherein the method comprises the following steps of: the argon pressure in the step 1) is 9000-13000Pa.
5. The method for manufacturing the high-strength nickel-based alloy wire for nuclear power according to claim 3, wherein the method comprises the following steps of: the argon pressure in the step 1) is 10000-11000Pa.
6. The method for manufacturing the high-strength nickel-based alloy wire for nuclear power according to claim 3, wherein the method comprises the following steps of: in the heat treatment of step 7), the cooling is furnace cooling.
7. The method for manufacturing the high-strength nickel-based alloy wire for nuclear power according to claim 6, wherein the method comprises the following steps: the cooling speed of the furnace cooling is 40-60 ℃/h.
8. Use of a high strength nickel-based alloy wire as claimed in claim 1 for nuclear power, in particular nuclear reactors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110592180.7A CN115404383B (en) | 2021-05-28 | 2021-05-28 | High-strength nickel-based alloy wire for nuclear power, manufacturing method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110592180.7A CN115404383B (en) | 2021-05-28 | 2021-05-28 | High-strength nickel-based alloy wire for nuclear power, manufacturing method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115404383A CN115404383A (en) | 2022-11-29 |
| CN115404383B true CN115404383B (en) | 2023-09-08 |
Family
ID=84155903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110592180.7A Active CN115404383B (en) | 2021-05-28 | 2021-05-28 | High-strength nickel-based alloy wire for nuclear power, manufacturing method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115404383B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173658A (en) * | 2011-12-22 | 2013-06-26 | 株式会社日立制作所 | Nickel based forged alloy, gas turbine member using said alloy and gas turbine using said member |
| CN104109780A (en) * | 2013-04-19 | 2014-10-22 | 宝钢特钢有限公司 | Nickel-based high-temperature alloy and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6821147B2 (en) * | 2018-09-26 | 2021-01-27 | 日立金属株式会社 | Ni-based super heat-resistant alloy for aircraft engine cases and aircraft engine cases made of this |
-
2021
- 2021-05-28 CN CN202110592180.7A patent/CN115404383B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103173658A (en) * | 2011-12-22 | 2013-06-26 | 株式会社日立制作所 | Nickel based forged alloy, gas turbine member using said alloy and gas turbine using said member |
| CN104109780A (en) * | 2013-04-19 | 2014-10-22 | 宝钢特钢有限公司 | Nickel-based high-temperature alloy and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115404383A (en) | 2022-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111187946B (en) | Nickel-based wrought superalloy with high aluminum content and preparation method thereof | |
| CN110551920B (en) | High-performance easy-processing nickel-based wrought superalloy and preparation method thereof | |
| CN108315599B (en) | A kind of high cobalt nickel base superalloy and preparation method thereof | |
| CN111074100A (en) | Nickel-based high-temperature alloy bar and preparation method thereof | |
| CN104630597B (en) | A kind of iron nickel and chromium high temperature alloy and its manufacture method | |
| CN110983111A (en) | Nickel-based high-temperature alloy plate and preparation method thereof | |
| CN114196854B (en) | High-strength and difficult-to-deform nickel-based high-temperature alloy and preparation method thereof | |
| CN105821250A (en) | High-strength nickel-base superalloy and manufacturing method thereof | |
| CN109136652B (en) | Nickel-based alloy large-section bar for nuclear power key equipment and manufacturing method thereof | |
| CN111057934A (en) | High-performance hot-work die steel and production process thereof | |
| CN104878248B (en) | High temperature alloy 625H and its manufacturing process | |
| CN106636848A (en) | Preparation method of abrasion-proof and corrosion-resistant nickel-based alloy wire | |
| CN112725688B (en) | Cold and hot dual-purpose steel for thread rolling die and preparation method thereof | |
| CN109136719A (en) | A kind of ageing strengthening type Ni-Cr base high-temperature corrosion-resistant alloy and heat treatment method | |
| CN111733346B (en) | High-temperature alloy for hydrogen fuel cell air compressor bearing and preparation method thereof | |
| CN114231765A (en) | Preparation method and application of high-temperature alloy bar | |
| CN115537603B (en) | High-temperature-resistant nickel-based alloy, manufacturing method and application thereof | |
| CN114592142A (en) | Medium-strength high-toughness titanium alloy with yield strength of 800MPa for ocean engineering and preparation process thereof | |
| CN114645159B (en) | High-temperature oxidation-resistant high-strength nickel-tungsten-cobalt-chromium alloy and preparation method thereof | |
| CN115404383B (en) | High-strength nickel-based alloy wire for nuclear power, manufacturing method and application | |
| CN114540731B (en) | GH4169 alloy bar and preparation method and fastener thereof | |
| CN112853222B (en) | 06Cr18Ni11Ti austenitic stainless steel and preparation method thereof | |
| CN114032420A (en) | High-performance cast high-temperature alloy | |
| CN114635075A (en) | High-strength high-ductility and toughness blade material | |
| CN111910104A (en) | Economical nickel-chromium-based high-temperature alloy for hydrogen fuel cell air compressor and foil thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |