CN113235014A - High-performance silicon-containing ferrite/martensite steel - Google Patents
High-performance silicon-containing ferrite/martensite steel Download PDFInfo
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- CN113235014A CN113235014A CN202110491788.0A CN202110491788A CN113235014A CN 113235014 A CN113235014 A CN 113235014A CN 202110491788 A CN202110491788 A CN 202110491788A CN 113235014 A CN113235014 A CN 113235014A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 229910000734 martensite Inorganic materials 0.000 title claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 239000010703 silicon Substances 0.000 title claims abstract description 15
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims abstract description 23
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 16
- 238000000137 annealing Methods 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 5
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 4
- 238000003723 Smelting Methods 0.000 claims abstract description 3
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000003758 nuclear fuel Substances 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007962 solid dispersion Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
-
- 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
-
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
Abstract
The invention discloses high-performance silicon-containing ferrite/martensite steel, which relates to the technical field of metal materials, and comprises the following chemical components in percentage by weight: 0.11 to 0.13 percent of C, 8.5 to 10 percent of Cr, 1.3 to 1.7 percent of W, 0.4 to 0.6 percent of Mn, 0.05 to 0.15 percent of Ta, 0.15 to 0.25 percent of V, 0.005 to 0.015 percent of Zr, 0.7 to 1.2 percent of Si, and the balance of Fe and inevitable impurities; the preparation method comprises the steps of firstly carrying out smelting and pouring according to the alloy steel component formula to obtain a steel ingot, and then carrying out equal-channel angular extrusion treatment on the steel ingot, wherein annealing treatment is carried out after each pass of extrusion treatment. The invention regulates and controls the microstructure of the 9Cr-F/M steel, including the type, size and distribution of precipitated phases, by improving the chemical components and the processing technology of the F/M alloy steel, and improves the comprehensive mechanical property of the alloy steel.
Description
Technical Field
The invention relates to the technical field of metal materials, in particular to high-performance silicon-containing ferrite/martensite steel.
Background
With the rapid development of national economy, energy problems are becoming a bottleneck restricting the sustainable development of economy, society and environment in China. The discovery and application of nuclear energy are one of the greatest scientific and technical achievements of human beings in the twentieth century, and the nuclear energy is an energy source which can replace fossil energy on a large scale, meet the ever-increasing power demand, improve the energy consumption structure and particularly relieve the emission of greenhouse gases. Nuclear energy is generated in a nuclear reactor, a critical part of which is the nuclear fuel cladding. For nuclear fuel cladding materials, not only is the nuclear fuel loaded, supported, but also the second critical barrier to the outward leakage of radioactive fission products (the nuclear fuel itself is the first barrier). Ferritic/martensitic (F/M) alloy steels are considered to be one of the most promising fuel cladding materials and other structural materials for nuclear reactors due to their excellent resistance to radiation swelling, good toughness-toughness combination and stable thermo-physical properties. Although a great deal of reports are made on the process for preparing ferrite/martensite (F/M) alloy steel at present, the process mainly focuses on casting-forging-hot rolling-normalizing-tempering, and reports on the casting-ECAP process are less, however, the comprehensive mechanical properties of the F/M alloy steel prepared by the existing process are general, and need to be further improved.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides high-performance silicon-containing ferrite/martensite steel, and the microstructure of 9Cr-F/M steel, including the type, size and distribution of precipitated phases, is regulated and controlled by improving the chemical components and the processing technology of F/M alloy steel, so that the comprehensive mechanical property of the alloy steel is improved.
The invention provides high-performance silicon-containing ferrite/martensite steel, which comprises the following chemical components in percentage by weight: 0.11 to 0.13 percent of C, 8.5 to 10 percent of Cr, 1.3 to 1.7 percent of W, 0.4 to 0.6 percent of Mn, 0.05 to 0.15 percent of Ta0.15 percent of V, 0.15 to 0.25 percent of V, 0.005 to 0.015 percent of Zr, 0.7 to 1.2 percent of Si, and the balance of Fe and inevitable impurities; the preparation method comprises the steps of firstly carrying out smelting and pouring according to the alloy steel component formula to obtain a steel ingot, and then carrying out equal-channel angular extrusion treatment on the steel ingot, wherein annealing treatment is carried out after each pass of extrusion treatment.
Preferably, the process parameters of the annealing treatment are as follows: annealing at 550-650 ℃ for 100-140 min.
Preferably, the equal channel angular pressing treatment is pressing by adopting a C path; the extrusion was carried out using extrusion dies having an intersection angle of 90 °.
Preferably, the steel ingot is subjected to equal channel angular extrusion treatment for 2-4 passes.
Has the advantages that: the invention provides high-performance silicon-containing ferrite/martensite steel, which analyzes the strengthening (including high-temperature solid solution and dispersion strengthening) and structure refining mechanisms of Ta, V and Zr through the strengthening and toughening theoretical analysis of alloy components and the thermodynamic theoretical calculation of a phase diagram, and introduces nanoparticles of transition metal carbide and/or nitride MC/N (M ═ Ta, V and Zr) into a base material by utilizing the dispersion strengthening mechanism to form a high-density dispersion nano second phase; in the preparation process of the alloy, element Si is added, a ternary nano phase with more stable thermodynamics can be generated with a nano second phase or an impurity oxygen element in a matrix, and the ternary nano phase can be dissolved in the matrix at the same time, so that the mechanical property of the material is improved, and the high-temperature corrosion resistance of the material is improved, and the chemical element composition of the F/M steel is determined by comprehensively considering the conditions of the plastic deformation capability, the structure refinement, the mechanical strengthening and toughening, the corrosion resistance, the welding performance and the like of the steel alloy; and then the crystal grains are obviously refined through the violent plastic deformation of equal channel angular extrusion to obtain an ultrafine crystal (submicron and nanocrystalline) structure, and the hardness and the tensile strength of the 9Cr-F/M steel are further improved under the condition of sacrificing partial elongation, so that the 9Cr-F/M steel has higher comprehensive mechanical properties. The invention regulates and controls the microstructure of the 9Cr-F/M steel, including the type, size and distribution of precipitated phases, by improving the chemical components and the processing technology of the F/M alloy steel, and improves the comprehensive mechanical property of the alloy steel.
Drawings
FIG. 1 is a graph comparing mechanical properties of F/M alloy steels prepared in example 1 of the present invention and comparative example 1; wherein, (a) ultimate tensile strength, and (b) elongation.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
The high-performance silicon-containing ferrite/martensite steel comprises the following chemical components in percentage by weight: 0.12% of C, 9% of Cr, 1.5% of W, 0.5% of Mn, 0.1% of Ta, 0.2% of V, 0.01% of Zr, 1.0% of Si, and the balance of Fe and inevitable impurities.
The preparation method comprises the following steps:
s1, preparing 25kg grade F/M steel ingots according to the alloy steel component formula by vacuum induction melting, wherein the ingot sizes are as follows: the diameter is 90mm, and the height is 100 mm;
s2, cutting the cast ingot into round bars with the diameter of 10 x 70mm, then extruding the round bars on an equal channel angular extrusion die according to a route C (namely, after each extrusion, the sample rotates 180 degrees along the extrusion direction and then carries out the next extrusion), wherein the intersection angle of the extrusion die is 90 degrees, then annealing the extruded sample at 600 ℃ for 2h in a heating furnace to reduce the internal stress caused by severe extrusion deformation, and annealing treatment is carried out after each extrusion treatment; and (3) performing equal channel angular extrusion treatment on the steel ingot for 2 times to obtain the F/M alloy steel.
The high-performance silicon-containing ferrite/martensite steel prepared above was measured to have a hardness of about 330Hv, an Ultimate Tensile Strength (UTS) of about 1100MPa, and a total Elongation (Elongation) of about 14%.
Comparative example 1
Compared with the example 1, the high-performance silicon-containing ferrite/martensite steel has the same chemical composition and is different only in the preparation process, and is prepared specifically as follows:
s1, preparing 25kg grade F/M steel ingots by vacuum induction melting according to the component formula, wherein the ingot size is as follows: the diameter is 90mm, and the height is 100 mm;
s2, forging the cast ingot at 1100 ℃/3h, wherein the forging deformation ratio is about 5, and obtaining a forged plate blank with low microscopic defects;
s3, before hot rolling deformation, rolling for one pass at 1100 ℃/1h, wherein the deformation is about 50%; then under the condition of 800 ℃/1h, carrying out 3-4-pass hot rolling deformation, wherein the single-pass deformation is about 30 percent, and obtaining a hot rolled plate with the thickness of 3-4 mm;
s4, continuously carrying out quenching heat treatment on the hot rolled plate at 1020 ℃ for 60min, wherein the quenching medium is water;
s5, tempering the plate after quenching heat treatment at 700 ℃ for 90min, and air-cooling to room temperature after tempering to obtain the final F/M alloy steel plate with the ferrite-martensite microstructure structure.
The high performance silicon-containing ferritic/martensitic steel prepared as described above was found to have a hardness of about 265Hv, an Ultimate Tensile Strength (UTS) of about 790MPa, and a total Elongation (Elongation) of about 23%.
The comparison of the mechanical properties of the F/M alloy steels prepared in example 1 and comparative example 1 is shown in FIG. 1, and the ultimate tensile strength of the F/M alloy steel prepared in example 1 is significantly improved compared with that of comparative example 1.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The high-performance silicon-containing ferrite/martensite steel is characterized by comprising the following chemical components in percentage by weight: 0.11 to 0.13 percent of C, 8.5 to 10 percent of Cr, 1.3 to 1.7 percent of W, 0.4 to 0.6 percent of Mn, 0.05 to 0.15 percent of Ta, 0.15 to 0.25 percent of V, 0.005 to 0.015 percent of Zr, 0.7 to 1.2 percent of Si, and the balance of Fe and inevitable impurities; the preparation method comprises the steps of firstly carrying out smelting and pouring according to the alloy steel component formula to obtain a steel ingot, and then carrying out equal-channel angular extrusion treatment on the steel ingot, wherein annealing treatment is carried out after each pass of extrusion treatment.
2. The high performance silicon-containing ferritic/martensitic steel according to claim 1, characterized in that the process parameters of the annealing treatment are: annealing at 550-650 ℃ for 100-140 min.
3. The high performance silicon-containing ferritic/martensitic steel as claimed in claim 1 or 2 wherein the equal channel angular extrusion treatment is extrusion using the C path; the extrusion was carried out using extrusion dies having an intersection angle of 90 °.
4. The high performance silicon-containing ferrite/martensite steel according to any one of claims 1 to 3, wherein the steel ingot is subjected to equal channel angular extrusion treatment for 2 to 4 passes.
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| CN202110491788.0A CN113235014A (en) | 2021-05-06 | 2021-05-06 | High-performance silicon-containing ferrite/martensite steel |
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| CN202110491788.0A CN113235014A (en) | 2021-05-06 | 2021-05-06 | High-performance silicon-containing ferrite/martensite steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113913706A (en) * | 2021-10-14 | 2022-01-11 | 中国科学院合肥物质科学研究院 | Anti-irradiation low-activation steel-based structural material capable of forming self-healing hydrogen permeation resistant layer through thermal oxidation |
| CN115125453A (en) * | 2022-07-19 | 2022-09-30 | 中国核动力研究设计院 | FeCrW-based iron-horse alloy and preparation method and application thereof |
| CN115354227A (en) * | 2022-08-22 | 2022-11-18 | 中国核动力研究设计院 | Ferrite martensitic steel for reactor fuel cladding material and heat treatment process thereof |
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|---|---|---|---|---|
| CN106148659A (en) * | 2015-04-17 | 2016-11-23 | 中国科学院金属研究所 | A kind of preparation technology of high-strength plasticity Ultra-fine Grained low activation ferrite/martensite steel |
| CN112695256A (en) * | 2020-11-27 | 2021-04-23 | 中国核动力研究设计院 | Ferrite martensite steel ladle shell material and preparation method thereof |
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2021
- 2021-05-06 CN CN202110491788.0A patent/CN113235014A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148659A (en) * | 2015-04-17 | 2016-11-23 | 中国科学院金属研究所 | A kind of preparation technology of high-strength plasticity Ultra-fine Grained low activation ferrite/martensite steel |
| CN112695256A (en) * | 2020-11-27 | 2021-04-23 | 中国核动力研究设计院 | Ferrite martensite steel ladle shell material and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113913706A (en) * | 2021-10-14 | 2022-01-11 | 中国科学院合肥物质科学研究院 | Anti-irradiation low-activation steel-based structural material capable of forming self-healing hydrogen permeation resistant layer through thermal oxidation |
| CN115125453A (en) * | 2022-07-19 | 2022-09-30 | 中国核动力研究设计院 | FeCrW-based iron-horse alloy and preparation method and application thereof |
| CN115354227A (en) * | 2022-08-22 | 2022-11-18 | 中国核动力研究设计院 | Ferrite martensitic steel for reactor fuel cladding material and heat treatment process thereof |
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