CN108588540B - Method for manufacturing nuclear power 1Cr15Ni36W3Ti alloy forged and rolled bar - Google Patents
Method for manufacturing nuclear power 1Cr15Ni36W3Ti alloy forged and rolled bar Download PDFInfo
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- CN108588540B CN108588540B CN201810316209.7A CN201810316209A CN108588540B CN 108588540 B CN108588540 B CN 108588540B CN 201810316209 A CN201810316209 A CN 201810316209A CN 108588540 B CN108588540 B CN 108588540B
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- cogging
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- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0nMS4wJyBlbmNvZGluZz0naXNvLTg4NTktMSc/Pgo8c3ZnIHZlcnNpb249JzEuMScgYmFzZVByb2ZpbGU9J2Z1bGwnCiAgICAgICAgICAgICAgeG1sbnM9J2h0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnJwogICAgICAgICAgICAgICAgICAgICAgeG1sbnM6cmRraXQ9J2h0dHA6Ly93d3cucmRraXQub3JnL3htbCcKICAgICAgICAgICAgICAgICAgICAgIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJwogICAgICAgICAgICAgICAgICB4bWw6c3BhY2U9J3ByZXNlcnZlJwp3aWR0aD0nMzAwcHgnIGhlaWdodD0nMzAwcHgnIHZpZXdCb3g9JzAgMCAzMDAgMzAwJz4KPCEtLSBFTkQgT0YgSEVBREVSIC0tPgo8cmVjdCBzdHlsZT0nb3BhY2l0eToxLjA7ZmlsbDojRkZGRkZGO3N0cm9rZTpub25lJyB3aWR0aD0nMzAwLjAnIGhlaWdodD0nMzAwLjAnIHg9JzAuMCcgeT0nMC4wJz4gPC9yZWN0Pgo8dGV4dCB4PScxMzguMCcgeT0nMTcwLjAnIGNsYXNzPSdhdG9tLTAnIHN0eWxlPSdmb250LXNpemU6NDBweDtmb250LXN0eWxlOm5vcm1hbDtmb250LXdlaWdodDpub3JtYWw7ZmlsbC1vcGFjaXR5OjE7c3Ryb2tlOm5vbmU7Zm9udC1mYW1pbHk6c2Fucy1zZXJpZjt0ZXh0LWFuY2hvcjpzdGFydDtmaWxsOiMzQjQxNDMnID5BPC90ZXh0Pgo8dGV4dCB4PScxNjUuNicgeT0nMTcwLjAnIGNsYXNzPSdhdG9tLTAnIHN0eWxlPSdmb250LXNpemU6NDBweDtmb250LXN0eWxlOm5vcm1hbDtmb250LXdlaWdodDpub3JtYWw7ZmlsbC1vcGFjaXR5OjE7c3Ryb2tlOm5vbmU7Zm9udC1mYW1pbHk6c2Fucy1zZXJpZjt0ZXh0LWFuY2hvcjpzdGFydDtmaWxsOiMzQjQxNDMnID5sPC90ZXh0Pgo8dGV4dCB4PScxNzQuOCcgeT0nMTU0LjAnIGNsYXNzPSdhdG9tLTAnIHN0eWxlPSdmb250LXNpemU6MjZweDtmb250LXN0eWxlOm5vcm1hbDtmb250LXdlaWdodDpub3JtYWw7ZmlsbC1vcGFjaXR5OjE7c3Ryb2tlOm5vbmU7Zm9udC1mYW1pbHk6c2Fucy1zZXJpZjt0ZXh0LWFuY2hvcjpzdGFydDtmaWxsOiMzQjQxNDMnID4zPC90ZXh0Pgo8dGV4dCB4PScxODguNycgeT0nMTU0LjAnIGNsYXNzPSdhdG9tLTAnIHN0eWxlPSdmb250LXNpemU6MjZweDtmb250LXN0eWxlOm5vcm1hbDtmb250LXdlaWdodDpub3JtYWw7ZmlsbC1vcGFjaXR5OjE7c3Ryb2tlOm5vbmU7Zm9udC1mYW1pbHk6c2Fucy1zZXJpZjt0ZXh0LWFuY2hvcjpzdGFydDtmaWxsOiMzQjQxNDMnID4rPC90ZXh0Pgo8L3N2Zz4K data:image/svg+xml;base64,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 [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 title claims abstract description 31
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- 238000005096 rolling process Methods 0.000 claims abstract description 13
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[Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
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- 239000011572 manganese Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
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- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
-
- 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
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- 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
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- 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
Abstract
The invention discloses a method for manufacturing a 1Cr15Ni36W3Ti alloy forged material and a rolled bar material for nuclear power, aiming at improving the room temperature and high temperature strength of the alloy. The technical scheme is as follows: the smelting method of non-vacuum induction and electroslag is adopted, and the strength of the alloy at room temperature and high temperature is improved through dispersion strengthening of carbide in the alloy; forging and cogging, forging into a material and rolling to control the heating temperature, so that fine crystal grains can be obtained; controlling the temperature of finish forging, finish forging of forged materials and finish rolling to recrystallize crystal grains; the single-hammer reduction amount of the rapid forging machine in the cogging process is controlled to be 60-80 mm, the processing ratio reaches 3-5, and the total deformation amount of the precision forging is controlled to be 30-50%. Reasonable processing ratio and deformation are beneficial to uniform uniformity of internal structure and performance of the alloy, and phenomena of coarse crystals and mixed crystals are effectively avoided. The invention has the beneficial effects that: fills the blank of the domestic 1Cr15Ni36W3Ti alloy production process, improves the room temperature and high temperature performance of the alloy, and is successfully applied to the manufacture of domestic nuclear power equipment.
Description
Technical Field
The invention belongs to the field of metal material manufacturing, and particularly relates to a method for manufacturing 1Cr15Ni36W3Ti alloy forged materials and rolled bars for nuclear power.
Background
The alloy belongs to an iron-nickel-based heat-strengthening alloy, the original Russian brand is З, the PirNt 35, the alloy is a single austenite structure, solid solution strengthening is performed through chromium and tungsten elements, high-content manganese in the alloy plays a role in oxidation resistance, and titanium elements with proper content are favorable for forming a gamma' phase and improving the room temperature and high-temperature strength of the alloy.
Disclosure of Invention
The invention discloses a method for manufacturing 1Cr15Ni36W3Ti alloy forged materials and rolled bars for nuclear power, and aims to control the heating temperature and deformation of forging and rolling and improve the room temperature and high temperature strength of the alloy by adopting a non-vacuum induction and electroslag remelting smelting process.
The invention adopts the following technical scheme:
1. the process route is as follows:
1) smelting in a non-vacuum induction furnace → electroslag remelting → 3150t quick forging machine cogging → 1800t fine forging machine forging bar → finished product heat treatment → finishing → flaw detection → surface inspection → packaging;
2) non-vacuum induction furnace smelting → electroslag remelting smelting → 3150t fast forging machine cogging → 1800t fine forging machine cogging → blank finishing → rolled bar → finished product heat treatment → finishing → flaw detection → surface inspection → packaging
2. The specific process measures are as follows:
1) smelting
The alloy is produced by adopting a non-vacuum induction and electroslag remelting process, and the size of an electroslag ingot isThe chemical composition of the finished product conforms to the specification of table 1.
TABLE 1
2)3150t quick forging and cogging
Forging an octagonal blank with the forging cogging size of 210mm of the forged bar, wherein the heating temperature is 1020-1060 ℃ in the forging cogging process, the single-hammer reduction is controlled at 60-80 mm, the processing ratio reaches 3-5, and the forging finish forging temperature is 800-820 ℃.
3)1800t precision forging cogging/finished product
The heating temperature is 1010-1030 ℃ in the cogging and forming process, the total deformation is 30-50%, and the forging finish forging temperature is 830-850 ℃.
4) Blank finishing
And carrying out surface finishing treatment on the bar billet, and carrying out full-surface polishing on the surface to ensure that the surface quality of the bar billet meets the requirement of subsequent rolling.
5) Rolling of
The rolling heating temperature of the bar is 1020-1040 ℃, the temperature of the blank is ensured to be uniform in the heating process, and the finishing temperature is 850-880 ℃.
6) Heat treatment of finished product
The heat treatment system of the finished product is as follows: controlling the solid solution temperature at 1080-1100 ℃, keeping the temperature for 30 minutes, and then cooling by water; the aging temperature is controlled to be 690-710 ℃, and the air cooling is carried out after the heat preservation time is 50 h.
The invention has the innovation points that:
1) the smelting method of non-vacuum induction and electroslag is adopted, and the strength of the alloy at room temperature and high temperature is improved through dispersion strengthening of carbide in the alloy.
2) The forging cogging, the forging forming and the rolling heating temperature are respectively controlled within the ranges of 1020-1060 ℃, 1010-1030 ℃ and 1020-1040 ℃, so that finer crystal grains can be obtained; the final forging, the forging finished material final forging and the final rolling temperature are respectively controlled within the ranges of 800-820 ℃, 830-850 ℃ and 850-880 ℃, so that the crystal grains can be recrystallized, and the alloy has good heredity.
3) The single-hammer reduction amount of the rapid forging machine in the cogging process is controlled to be 60-80 mm, the processing ratio reaches 3-5, and the total deformation amount of the precision forging is controlled to be 30-50%. Reasonable processing ratio and deformation are beneficial to uniform internal structure of the alloy, the phenomena of coarse grains and mixed grains are effectively avoided, and the uniformity of the alloy structure performance is improved.
The invention has the beneficial effects that: fills the blank of the domestic production process of the 1Cr15Ni36W3Ti alloy, improves the room temperature and high temperature performance of the 1Cr15Ni36W3Ti alloy, and is successfully applied to the manufacture of domestic nuclear power equipment.
Detailed Description
The present invention is described in detail below by way of examples.
Example 1
Specification of rolled bar finished product: phi 50mm
The alloy is smelted into ingots through a non-vacuum induction furnace and electroslag remelting, and the chemical components are shown in table 2.
TABLE 2
Cogging a steel ingot to a 210mm octagonal billet by a 3150t quick forging machine, wherein the first cogging heating temperature is 1060 ℃, the second cogging heating temperature is 1020 ℃, the cogging single hammer is pressed down for 60mm, the processing ratio is 3, and the quick forging finish forging temperature is 800 ℃; the heating temperature of 1800t precision forging cogging is 1020 ℃, the total deformation is 30 percent, the surface is good, and the temperature of precision forging and finish forging is 850 ℃.
The rod blank is polished to ensure no defect on the surface and is used for rolling steel. The first heating temperature of rolling is 1040 ℃, the second heating temperature is 1020 ℃, the blank temperature is uniform in the heating process, and the final rolling temperature is 850-880 ℃.
And carrying out finished product heat treatment on the rolled bar, preserving heat at 1090 ℃ for 30min, then cooling by water, preserving heat at the aging temperature of 700 ℃ for 50h, and then cooling by air.
And (4) finishing, detecting a flaw, packaging after qualified surface inspection and the like of the finished bar product after heat treatment.
The test results of the room temperature mechanical properties of the bar finished product are shown in Table 3.
TABLE 3
The high temperature mechanical property test results of the bar finished product are shown in table 4.
TABLE 4
Example 2
Specification of a forged bar finished product: phi 140mm
The alloy is smelted into ingots through a non-vacuum induction furnace and electroslag remelting, the chemical components are shown in Table 5,
TABLE 5
Cogging a steel ingot to a 210mm octagonal billet by a 3150t quick forging machine, wherein the first cogging heating temperature is 1060 ℃, the second cogging heating temperature is 1020 ℃, the cogging single hammer reduction is 80mm, the processing ratio is 5, and the quick forging finish forging temperature is 820 ℃; the heating temperature of 1800t of finish forging and cogging is 1030 ℃, the total deformation is 50 percent, the surface is good, and the finish forging temperature of the finish forging is 830 ℃.
And carrying out finished product heat treatment on the forged bar, preserving heat at 1090 ℃ for 3030min, then cooling by water, preserving heat at the aging temperature of 700 ℃ for 50h, and then cooling by air.
And (4) finishing, detecting a flaw, packaging after qualified surface inspection and the like of the finished bar product after heat treatment.
The test results of the room temperature mechanical properties of the bar finished product are shown in Table 6.
TABLE 6
The high temperature mechanical property test results of the bar finished product are shown in Table 7.
TABLE 7
The alloy forged and rolled bars produced by the two processes have good surfaces and no cracks, and all performance indexes are qualified and have certain margin. Table 7 elongation and face reduction are reference values in the standard.
Claims (3)
1. A method for manufacturing 1Cr15Ni36W3Ti alloy forged bars and rolled bars for nuclear power is characterized in that: the process route of the manufacturing method comprises the following steps:
1) smelting in a non-vacuum induction furnace → electroslag remelting steel ingot → 3150t fast forging machine cogging → 1800t precision forging machine forging bar → finished product heat treatment → finishing → flaw detection → surface inspection → packaging;
2) smelting in a non-vacuum induction furnace → electroslag remelting steel ingot → 3150t quick forging machine cogging → 1800t fine forging machine cogging → blank finishing → rolled bar → finished product heat treatment → finishing → flaw detection → surface inspection → packaging;
the method comprises the following steps of (1) cogging by using a 3150t quick forging machine, wherein the cogging size of a 210mm octagonal billet of a forged bar material is required to be 1020-1060 ℃, the single hammer reduction is controlled to be 60-80 mm, the processing ratio is 3-5, and the forging finish forging temperature is 800-820 ℃;
the temperature for cogging and finished product heating of the 1800t precision forging machine is 1010-1030 ℃, the total deformation is 30-50%, and the forging finish forging temperature is 830-850 ℃;
the heating temperature of the rolled bar is 1020-1040 ℃, the temperature of the blank is ensured to be uniform in the heating process, and the finishing temperature is 850-880 ℃.
2. The method for manufacturing the nuclear power 1Cr15Ni36W3Ti alloy forged bar and the nuclear power rolled bar according to claim 1, wherein the method comprises the following steps: the steel ingot is cogging by a 3150t quick forging machine to 210mm octagonal billet, the first thermal heating temperature for cogging is 1060 ℃, the second thermal heating temperature is 1020 ℃, the single hammer for cogging is pressed down for 60mm, the processing ratio is 3, and the final forging temperature for quick forging is 800 ℃;
the cogging heating temperature of the 1800t precision forging machine is 1020 ℃, the total deformation is 30 percent, and the precision forging and finish forging temperature is 850 ℃;
the first heating temperature for rolling the rolled bar is 1040 ℃, the second heating temperature is 1020 ℃, the blank temperature is uniform in the heating process, and the final rolling temperature is 850-880 ℃.
3. The method for manufacturing the nuclear power 1Cr15Ni36W3Ti alloy forged bar and the nuclear power rolled bar according to claim 1, wherein the method comprises the following steps: the steel ingot is cogging by a 3150t quick forging machine to 210mm octagonal billet, the first thermal heating temperature for cogging is 1060 ℃, the second thermal heating temperature is 1020 ℃, the single hammer for cogging is reduced by 80mm, the processing ratio is 5, and the final forging temperature for quick forging is 820 ℃;
the temperature for cogging and finished product heating of the 1800t precision forging machine is 1030 ℃, the total deformation is 50%, and the temperature for precision forging and finish forging is 830 ℃.
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