CN116377336A - High-toughness cast steel and production method thereof - Google Patents
High-toughness cast steel and production method thereof Download PDFInfo
- Publication number
- CN116377336A CN116377336A CN202310545884.8A CN202310545884A CN116377336A CN 116377336 A CN116377336 A CN 116377336A CN 202310545884 A CN202310545884 A CN 202310545884A CN 116377336 A CN116377336 A CN 116377336A
- Authority
- CN
- China
- Prior art keywords
- intermediate alloy
- percent
- cast steel
- parts
- treatment
- 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.)
- Pending
Links
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 238000000576 coating method Methods 0.000 claims abstract description 39
- 239000011159 matrix material Substances 0.000 claims abstract description 39
- HHWDZLSGDDXUSM-UHFFFAOYSA-N n-[4-cyano-3-(trifluoromethyl)phenyl]-2-methylprop-2-enamide Chemical compound CC(=C)C(=O)NC1=CC=C(C#N)C(C(F)(F)F)=C1 HHWDZLSGDDXUSM-UHFFFAOYSA-N 0.000 claims abstract description 39
- KKFHAJHLJHVUDM-UHFFFAOYSA-N n-vinylcarbazole Chemical compound C1=CC=C2N(C=C)C3=CC=CC=C3C2=C1 KKFHAJHLJHVUDM-UHFFFAOYSA-N 0.000 claims abstract description 39
- AUVPWTYQZMLSKY-UHFFFAOYSA-N boron;vanadium Chemical compound [V]#B AUVPWTYQZMLSKY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229920001577 copolymer Polymers 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 24
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 23
- 239000004693 Polybenzimidazole Substances 0.000 claims abstract description 22
- 229920002480 polybenzimidazole Polymers 0.000 claims abstract description 22
- 239000002904 solvent Substances 0.000 claims abstract description 16
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 141
- 239000000956 alloy Substances 0.000 claims description 141
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 60
- 238000000137 annealing Methods 0.000 claims description 30
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 24
- 238000004321 preservation Methods 0.000 claims description 24
- 239000003999 initiator Substances 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 21
- 238000005496 tempering Methods 0.000 claims description 21
- 238000010791 quenching Methods 0.000 claims description 17
- 230000000171 quenching effect Effects 0.000 claims description 17
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000011261 inert gas Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical group N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 7
- 238000005495 investment casting Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- 230000001376 precipitating effect Effects 0.000 claims description 7
- 150000002910 rare earth metals Chemical class 0.000 claims description 7
- 238000007528 sand casting Methods 0.000 claims description 7
- 229910052706 scandium Inorganic materials 0.000 claims description 7
- 238000009628 steelmaking Methods 0.000 claims description 7
- 238000001291 vacuum drying Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 229910052727 yttrium Inorganic materials 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052733 gallium Inorganic materials 0.000 claims description 3
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052754 neon Inorganic materials 0.000 claims description 3
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052702 rhenium Inorganic materials 0.000 claims description 3
- 229910052716 thallium Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 14
- 238000005260 corrosion Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 12
- 230000003111 delayed effect Effects 0.000 abstract description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000011161 development Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- -1 cyano-trifluoromethyl phenyl Chemical group 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 150000002148 esters Chemical group 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003335 steric effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/007—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0068—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0073—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only borides
-
- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/26—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
-
- 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
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
-
- 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
-
- 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)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses high-toughness cast steel and a production method thereof, and relates to the technical field of cast steel materials, wherein the high-toughness cast steel comprises a steel matrix and a functional coating coated on the surface of the steel matrix; the steel matrix comprises the following components: C. si, mn, cr, co, zr, ba, nb, ga, tl, te, cu, hf rare earth elements, re, N, B and nano vanadium boride, and the balance of Fe; the functional coating is prepared from the following raw materials in parts by weight: 5-10 parts of amino-terminated hyperbranched polybenzimidazole, 40-50 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer, 1-3 parts of 4, 4-diaminodiphenyl sulfide and 50-80 parts of solvent. The high-toughness cast steel has the advantages of high strength, sufficient toughness, good corrosion resistance and delayed fracture resistance.
Description
Technical Field
The invention relates to the technical field of cast steel materials, in particular to high-toughness cast steel and a production method thereof.
Background
The variety, yield and quality of steel materials are one of the most important marks of the national industrial development level, and are the material assurance for the sustainable and stable development of national economy. As a common steel material, the high-toughness cast steel is widely applied in the field of engineering structural materials, and is a preferred material of main bearing components in the fields of aerospace, engineering machinery, railway locomotives, important parts on automobiles and the like.
The existing common cast steel has contradiction between strength and toughness, and in order to improve the strength, the total amount of C and alloy elements in the steel needs to be improved, so that the toughness is reduced. The high-toughness cast steel on the market has the defects of high production cost, insufficient strength, corrosion resistance and delayed fracture resistance to be further improved.
In order to solve the defects, chinese patent No. 109750220A discloses a high-strength and high-toughness cast steel material with the tensile strength of 1200MPa, the room temperature impact of 30J and the elongation of 10 percent (the weight percentage (wt%) of each element in the material composition is 0.3 to 0.4 percent of C,0.6 to 1.4 percent of Si,0.8 to 1.3 percent of Mn,0.6 to 1.4 percent of Cr,0.03 to 0.1 percent of RE,0.1 to 0.4 percent of Mo,0.06 to 0.15 percent of V, S is less than or equal to 0.03 percent, P is less than or equal to 0.03 percent, and the balance is Fe.), and the tensile strength still has some defects in toughness and plasticity, the impact power is only 30J and the elongation is 10 percent.
Therefore, the development of the high-toughness cast steel with high strength, sufficient toughness and excellent corrosion resistance and delayed fracture resistance and the production method thereof meet the market demand, have wide market value and application prospect, and have very important significance for promoting the development of the field of cast steel materials.
Disclosure of Invention
The invention mainly aims to provide high-toughness cast steel with high strength, sufficient toughness and excellent corrosion resistance and delayed fracture resistance and a production method thereof.
In order to achieve the above purpose, the invention provides a high-toughness cast steel, which comprises a steel matrix and a functional coating coated on the surface of the steel matrix; the steel matrix comprises the following components in percentage by mass: 0.1 to 0.25 percent of C, 0.2 to 0.7 percent of Si, 0.6 to 1.6 percent of Mn, 0.5 to 1.3 percent of Cr, 0.1 to 0.3 percent of Co, 0.01 to 0.1 percent of Zr, 0.003 to 0.006 percent of Ba, 0.01 to 0.1 percent of Nb, 0.01 to 0.03 percent of Ga, 0.01 to 0.03 percent of Tl, 0.005 to 0.013 percent of Te, 0.3 to 0.5 percent of Cu, 0.01 to 0.015 percent of Hf, 0.01 to 0.03 percent of rare earth element, 0.001 to 0.004 percent of Re, 0.001 to 0.004 percent of N, 0.0001 to 0.0005 percent of B, 0.008 to 0.012 percent of nano vanadium boride and the balance of Fe.
Preferably, the functional coating has a thickness of 60-210 μm.
Preferably, the rare earth element is a mixture formed by mixing Sc, Y, ce, gd (1-2): 1 (1-3): 0.3-0.5 by mass ratio.
Preferably, the steel matrix further comprises the following components in percentage by mass: 0.003 to 0.01 percent of nano titanium nitride.
Preferably, the particle size of the nano vanadium boride is 10-80nm; the grain diameter of the nano titanium nitride is 30-60nm.
Preferably, the functional coating comprises the following raw materials in parts by weight: 5-10 parts of amino-terminated hyperbranched polybenzimidazole, 40-50 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer, 1-3 parts of 4, 4-diaminodiphenyl sulfide and 50-80 parts of solvent.
Preferably, the amino-terminated hyperbranched polybenzimidazole is prepared according to the preparation method of amino-terminated hyperbranched polybenzimidazole in the Chinese invention patent example 3 with the application number of 200510111019.4.
Preferably, the preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide, N-vinyl carbazole, glycidyl methacrylate and an initiator into N, N-dimethylformamide, stirring and reacting for 3-5 hours at 60-70 ℃ in an inert gas atmosphere, precipitating in water, washing the precipitated polymer with ethanol for 3-6 times, and finally drying in a vacuum drying oven at 85-95 ℃ to constant weight to obtain the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer.
Preferably, the mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide, the N-vinyl carbazole, the glycidyl methacrylate, the initiator and the N, N-dimethylformamide is (2-4): 3 (0.8-1.2): 0.06-0.09): 20-30.
Preferably, the initiator is azobisisobutyronitrile; the inert gas is any one of nitrogen, helium, neon and argon.
Preferably, the solvent is at least one of N, N-dimethylformamide and N, N-dimethylacetamide.
Another object of the present invention is to provide a method for producing the high-toughness cast steel, comprising the steps of:
s1, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Co intermediate alloy, fe-Zr intermediate alloy, fe-Ba intermediate alloy, fe-Nb intermediate alloy, fe-Ga intermediate alloy, fe-Tl intermediate alloy, fe-Te intermediate alloy, fe-Cu intermediate alloy, fe-Hf intermediate alloy, rare earth element-Fe intermediate alloy, fe-Re intermediate alloy, fe-N intermediate alloy and Fe-B intermediate alloy in a vacuum induction furnace by adopting a conventional steelmaking process, stirring after all raw materials are completely melted to ensure that the alloy components are uniform, adding nano vanadium boride and nano titanium nitride preheated to 700-850 ℃ into the molten alloy, and stirring to ensure that the components are uniform to obtain the doped alloy molten solution;
step S2, casting and molding by using a sand casting or precision casting process;
and step S3, annealing treatment, normalizing treatment, quenching treatment and tempering treatment are sequentially carried out.
And step S4, uniformly mixing the components of the functional coating according to parts by weight, coating the mixture on the surface of the steel matrix obtained by the treatment of S3, and curing for 2-4 hours at 110-120 ℃.
Preferably, the annealing treatment temperature is 880-920 ℃, the heat preservation time is 3-5h, the annealing treatment is cooled to below 300 ℃, and the annealing treatment is discharged from the furnace and cooled to room temperature.
Preferably, the temperature of the normalizing treatment is 930-970 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 4-6 hours.
Preferably, the temperature of the quenching treatment is 910-930 ℃, and the quenching treatment is water-cooled after heat preservation for 4-6 hours.
Preferably, the tempering treatment temperature is 640-660 ℃, and the tempering treatment is carried out in air after 3-5h of heat preservation.
Due to the application of the technical scheme, the invention has the following beneficial effects:
(1) The production method of the high-toughness cast steel disclosed by the invention can be realized by adopting conventional equipment and production lines, does not need to put a large amount of funds, has the advantages of simple production process, convenient operation control and high production efficiency and finished product qualification rate, and is suitable for industrial production.
(2) The invention discloses high-toughness cast steel, which comprises a steel matrix and a functional coating coated on the surface of the steel matrix; the steel matrix comprises the following components in percentage by mass: 0.1 to 0.25 percent of C, 0.2 to 0.7 percent of Si, 0.6 to 1.6 percent of Mn, 0.5 to 1.3 percent of Cr, 0.1 to 0.3 percent of Co, 0.01 to 0.1 percent of Zr, 0.003 to 0.006 percent of Ba, 0.01 to 0.1 percent of Nb, 0.01 to 0.03 percent of Ga, 0.01 to 0.03 percent of Tl, 0.005 to 0.013 percent of Te, 0.3 to 0.5 percent of Cu, 0.01 to 0.015 percent of Hf, 0.01 to 0.03 percent of rare earth element, 0.001 to 0.004 percent of Re, 0.001 to 0.004 percent of N, 0.0001 to 0.0005 percent of B, 0.008 to 0.012 percent of nano vanadium boride and the balance of Fe. Through the structural design, the raw materials of all the components can be matched with each other to perform a combined action, so that the manufactured product has high strength, sufficient toughness and good corrosion resistance and delayed fracture resistance.
(3) The addition of the nano titanium nitride and the nano vanadium boride of the high-toughness cast steel disclosed by the invention can play a role in dispersion strengthening, and can refine grains and improve the corrosion resistance, strength and delayed fracture resistance of the material. The functional coating is prepared from the following raw materials in parts by weight: 5-10 parts of amino-terminated hyperbranched polybenzimidazole, 40-50 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer, 1-3 parts of 4, 4-diaminodiphenyl sulfide and 50-80 parts of solvent. Epoxy groups on the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer can react with amino groups on amino-terminated hyperbranched polybenzimidazole and 4, 4-diaminodiphenyl sulfide in an epoxy ring-opening way to form an interpenetrating network structure, carbazole, hyperbranched benzimidazole, thioether, cyano-trifluoromethyl phenyl, amide groups, hydroxyl groups, amino groups and ester structures are simultaneously introduced into the formed film molecular structure, and the structures can better protect a steel substrate under the multiple actions of an electronic effect, a steric effect and a conjugation effect, so that the corrosion resistance and the performance stability of the steel substrate are improved, the service life of the steel substrate is prolonged, the groups are mutually matched, the adhesiveness with the steel substrate is improved, and the delamination problem in the long-term use process is avoided.
(4) The high-toughness cast steel disclosed by the invention has the advantages that the prepared material has better strength, sufficient toughness and good corrosion resistance and delayed fracture resistance through reasonable selection of a heat treatment process, so that the service life of the high-toughness cast steel is prolonged.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art.
Example 1
A high-toughness cast steel comprises a steel matrix and a functional coating coated on the surface of the steel matrix; the steel matrix comprises the following components in percentage by mass: 0.1% of C, 0.2% of Si, 0.6% of Mn, 0.5% of Cr, 0.1% of Co, 0.01% of Zr, 0.003% of Ba, 0.01% of Nb, 0.01% of Ga, 0.01% of Tl, 0.005% of Te, 0.3% of Cu, 0.01% of Hf, 0.01% of rare earth elements, 0.001% of Re, 0.001% of N, 0.0001% of B, 0.008% of nano vanadium boride and the balance of Fe.
The thickness of the functional coating is 60 mu m; the rare earth element is a mixture formed by mixing Sc, Y, ce, gd according to a mass ratio of 1:1:1:0.3; the steel matrix also comprises the following components in percentage by mass: nano titanium nitride 0.003%; the particle size of the nano vanadium boride is 10nm; the particle size of the nano titanium nitride is 30nm.
The functional coating is prepared from the following raw materials in parts by weight: 5 parts of amino-terminated hyperbranched polybenzimidazole, 40 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer, 1 part of 4, 4-diaminodiphenyl sulfide and 50 parts of solvent; the amino-terminated hyperbranched polybenzimidazole is prepared by a preparation method of amino-terminated hyperbranched polybenzimidazole in the Chinese invention patent example 3 with the application number of 200510111019.4; the solvent is N, N-dimethylformamide.
The preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, N-vinylcarbazole, glycidyl methacrylate and an initiator into N, N-dimethylformamide, stirring and reacting for 3 hours at 60 ℃ in an inert gas atmosphere, precipitating in water, washing the precipitated polymer with ethanol for 3 times, and finally drying to constant weight at 85 ℃ in a vacuum drying oven to obtain an N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/N-vinylcarbazole/glycidyl methacrylate copolymer; the mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide to the N-vinyl carbazole to the glycidyl methacrylate to the initiator to the N, N-dimethylformamide is 2:3:0.8:0.06:20; the initiator is azodiisobutyronitrile; the inert gas is nitrogen. By GPC testingM of the copolymer n =13578g/mol，M W /M n =1.368; the mass ratio of the structural units respectively introduced by N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, N-vinylcarbazole and glycidyl methacrylate in the copolymer is 1.98:2.97:0.8 as proved by element quantification and weight change analysis.
The production method of the high-toughness cast steel comprises the following steps:
s1, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Co intermediate alloy, fe-Zr intermediate alloy, fe-Ba intermediate alloy, fe-Nb intermediate alloy, fe-Ga intermediate alloy, fe-Tl intermediate alloy, fe-Te intermediate alloy, fe-Cu intermediate alloy, fe-Hf intermediate alloy, rare earth element-Fe intermediate alloy, fe-Re intermediate alloy, fe-N intermediate alloy and Fe-B intermediate alloy in a vacuum induction furnace by adopting a conventional steelmaking process, stirring after all raw materials are completely melted to ensure that the alloy components are uniform, adding nano vanadium boride and nano titanium nitride preheated to 700 ℃ into the melted alloy melt, and stirring to ensure that the components are uniform to obtain the doped alloy melt;
step S2, casting and molding by using a sand casting or precision casting process;
and step S3, annealing treatment, normalizing treatment, quenching treatment and tempering treatment are sequentially carried out.
And S4, uniformly mixing the components of the functional coating according to parts by weight, coating the components on the surface of the steel matrix obtained through the S3 treatment, and curing for 2 hours at 110 ℃.
The annealing treatment temperature is 880 ℃, the heat preservation time is 3 hours, the annealing treatment is cooled to below 300 ℃, and the annealing treatment is carried out after the annealing treatment is carried out, and the annealing treatment is carried out and cooled to room temperature; the temperature of the normalizing treatment is 930 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 4 hours; the temperature of the quenching treatment is 910 ℃, and water cooling is performed after heat preservation for 4 hours; the tempering treatment temperature is 640 ℃, and the tempering treatment is cooled in air after heat preservation for 3 hours.
Example 2
A high-toughness cast steel comprises a steel matrix and a functional coating coated on the surface of the steel matrix; the steel matrix comprises the following components in percentage by mass: 0.15% of C, 0.3% of Si,0.8% of Mn, 0.7% of Cr, 0.15% of Co, 0.03% of Zr, 0.004% of Ba, 0.03% of Nb, 0.015% of Ga, 0.015% of Tl, 0.007% of Te, 0.35% of Cu, 0.012% of Hf, 0.015% of rare earth element, 0.002% of Re, 0.002% of N, 0.0002% of B, 0.009% of nano vanadium boride and the balance of Fe.
The thickness of the functional coating is 100 mu m; the rare earth element is a mixture formed by mixing Sc, Y, ce, gd according to the mass ratio of 1.2:1:1.5:0.35; the steel matrix also comprises the following components in percentage by mass: nano titanium nitride 0.006%; the grain diameter of the nano vanadium boride is 30nm; the particle size of the nano titanium nitride is 40nm.
The functional coating is prepared from the following raw materials in parts by weight: 6 parts of amino-terminated hyperbranched polybenzimidazole, 43 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer, 1.5 parts of 4, 4-diaminodiphenyl sulfide and 60 parts of solvent; the amino-terminated hyperbranched polybenzimidazole is prepared by a preparation method of amino-terminated hyperbranched polybenzimidazole in the Chinese invention patent example 3 with the application number of 200510111019.4; the solvent is N, N-dimethylacetamide.
The preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, N-vinylcarbazole, glycidyl methacrylate and an initiator into N, N-dimethylformamide, stirring and reacting for 3.5 hours at 63 ℃ in an inert gas atmosphere, precipitating in water, washing the precipitated polymer with ethanol for 4 times, and finally drying in a vacuum drying oven at 87 ℃ to constant weight to obtain an N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/N-vinylcarbazole/glycidyl methacrylate copolymer; the mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide to the N-vinyl carbazole to the glycidyl methacrylate to the initiator to the N, N-dimethylformamide is 2.5:3:0.9:0.07:23; the initiator is azodiisobutyronitrile; the inert gas is helium.
The production method of the high-toughness cast steel comprises the following steps:
s1, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Co intermediate alloy, fe-Zr intermediate alloy, fe-Ba intermediate alloy, fe-Nb intermediate alloy, fe-Ga intermediate alloy, fe-Tl intermediate alloy, fe-Te intermediate alloy, fe-Cu intermediate alloy, fe-Hf intermediate alloy, rare earth element-Fe intermediate alloy, fe-Re intermediate alloy, fe-N intermediate alloy and Fe-B intermediate alloy in a vacuum induction furnace by adopting a conventional steelmaking process, stirring after all raw materials are completely melted to ensure that the alloy components are uniform, adding nano vanadium boride and nano titanium nitride preheated to 750 ℃ into the melted alloy melt, and stirring to ensure that the components are uniform to obtain the doped alloy melt;
step S2, casting and molding by using a sand casting or precision casting process;
and step S3, annealing treatment, normalizing treatment, quenching treatment and tempering treatment are sequentially carried out.
And S4, uniformly mixing the components of the functional coating according to parts by weight, coating the components on the surface of the steel substrate obtained through the S3 treatment, and curing for 2.5 hours at 113 ℃.
The annealing treatment temperature is 890 ℃, the heat preservation time is 3.5h, and the annealing treatment is cooled to below 300 ℃, discharged from the furnace and cooled to room temperature; the normalizing treatment is carried out at the temperature of 940 ℃ for 4.5 hours and then cooled in air; the quenching treatment temperature is 915 ℃, and water cooling is performed after heat preservation for 4.5 hours; the tempering treatment temperature is 645 ℃, and the tempering treatment temperature is kept for 3.5 hours and then is cooled in the air.
Example 3
A high-toughness cast steel comprises a steel matrix and a functional coating coated on the surface of the steel matrix; the steel matrix comprises the following components in percentage by mass: 0.18% of C, 0.45% of Si, 1.1% of Mn, 0.9% of Cr, 0.2% of Co, 0.06% of Zr, 0.0045% of Ba, 0.06% of Nb, 0.02% of Ga, 0.02% of Tl, 0.009% of Te, 0.4% of Cu, 0.013% of Hf, 0.02% of rare earth elements, 0.0025% of Re, 0.0025% of N, 0.00035% of B, 0.01% of nano vanadium boride and the balance of Fe.
The thickness of the functional coating is 150 mu m; the rare earth element is a mixture formed by mixing Sc, Y, ce, gd according to a mass ratio of 1.5:1:2:0.4; the steel matrix also comprises the following components in percentage by mass: nano titanium nitride 0.007%; the grain diameter of the nano vanadium boride is 50nm; the particle size of the nano titanium nitride is 45nm.
The functional coating is prepared from the following raw materials in parts by weight: 7.5 parts of amino-terminated hyperbranched polybenzimidazole, 45 parts of N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/N-vinylcarbazole/glycidyl methacrylate copolymer, 2 parts of 4, 4-diaminodiphenyl sulfide and 65 parts of solvent; the amino-terminated hyperbranched polybenzimidazole is prepared by a preparation method of amino-terminated hyperbranched polybenzimidazole in the Chinese invention patent example 3 with the application number of 200510111019.4; the solvent is N, N-dimethylformamide.
The preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, N-vinylcarbazole, glycidyl methacrylate and an initiator into N, N-dimethylformamide, stirring and reacting for 4 hours at 65 ℃ in an inert gas atmosphere, precipitating in water, washing the precipitated polymer with ethanol for 5 times, and finally drying to constant weight at 90 ℃ in a vacuum drying oven to obtain an N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/N-vinylcarbazole/glycidyl methacrylate copolymer; the mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide to the N-vinyl carbazole to the glycidyl methacrylate to the initiator to the N, N-dimethylformamide is 3:3:1:0.075:25; the initiator is azodiisobutyronitrile; the inert gas is neon.
The production method of the high-toughness cast steel comprises the following steps:
s1, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Co intermediate alloy, fe-Zr intermediate alloy, fe-Ba intermediate alloy, fe-Nb intermediate alloy, fe-Ga intermediate alloy, fe-Tl intermediate alloy, fe-Te intermediate alloy, fe-Cu intermediate alloy, fe-Hf intermediate alloy, rare earth element-Fe intermediate alloy, fe-Re intermediate alloy, fe-N intermediate alloy and Fe-B intermediate alloy in a vacuum induction furnace by adopting a conventional steelmaking process, stirring after all raw materials are completely melted to ensure that the alloy components are uniform, adding nano vanadium boride and nano titanium nitride preheated to 790 ℃ into the melted alloy melt, and stirring to ensure that the components are uniform to obtain the doped alloy melt;
step S2, casting and molding by using a sand casting or precision casting process;
and step S3, annealing treatment, normalizing treatment, quenching treatment and tempering treatment are sequentially carried out.
And S4, uniformly mixing the components of the functional coating according to parts by weight, coating the components on the surface of the steel substrate obtained through the S3 treatment, and curing for 3 hours at 115 ℃.
The annealing treatment temperature is 900 ℃, the heat preservation time is 4 hours, the annealing treatment is cooled to below 300 ℃, and the annealing treatment is carried out after the annealing treatment is carried out, and the annealing treatment is carried out and cooled to room temperature; the temperature of the normalizing treatment is 950 ℃, and the heat preservation time is 5 hours and then the normalizing treatment is cooled in the air; the quenching treatment temperature is 920 ℃, and water cooling is performed after heat preservation for 5 hours; the tempering treatment temperature is 650 ℃, and the tempering treatment is cooled in air after heat preservation for 4 hours.
Example 4
A high-toughness cast steel comprises a steel matrix and a functional coating coated on the surface of the steel matrix; the steel matrix comprises the following components in percentage by mass: 0.23% of C,0.6% of Si, 1.4% of Mn, 1.2% of Cr, 0.25% of Co, 0.08% of Zr, 0.005% of Ba, 0.08% of Nb, 0.025% of Ga, 0.025% of Tl, 0.01% of Te, 0.45% of Cu, 0.013% of Hf, 0.025% of rare earth elements, 0.0035% of Re, 0.0035% of N, 0.0004% of B, 0.011% of nano vanadium boride and the balance of Fe.
The thickness of the functional coating is 190 mu m; the rare earth element is a mixture formed by mixing Sc, Y, ce, gd according to the mass ratio of 1.8:1:2.5:0.45; the steel matrix also comprises the following components in percentage by mass: nano titanium nitride 0.009%; the particle size of the nano vanadium boride is 70nm; the particle size of the nano titanium nitride is 55nm.
The functional coating is prepared from the following raw materials in parts by weight: 9 parts of amino-terminated hyperbranched polybenzimidazole, 48 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer, 2.5 parts of 4, 4-diaminodiphenyl sulfide and 75 parts of solvent; the amino-terminated hyperbranched polybenzimidazole is prepared by a preparation method of amino-terminated hyperbranched polybenzimidazole in the Chinese patent application example 3 with the application number of 200510111019.4.
The preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, N-vinylcarbazole, glycidyl methacrylate and an initiator into N, N-dimethylformamide, stirring and reacting for 4.5 hours at 68 ℃ in an inert gas atmosphere, precipitating in water, washing the precipitated polymer with ethanol for 6 times, and finally drying to constant weight at 93 ℃ in a vacuum drying oven to obtain the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/N-vinylcarbazole/glycidyl methacrylate copolymer.
The mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide to the N-vinyl carbazole to the glycidyl methacrylate to the initiator to the N, N-dimethylformamide is 3.5:3:1.1:0.085:28; the initiator is azodiisobutyronitrile; the inert gas is argon; the solvent is a mixture formed by mixing N, N-dimethylformamide and N, N-dimethylacetamide according to a mass ratio of 3:5.
The production method of the high-toughness cast steel comprises the following steps:
s1, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Co intermediate alloy, fe-Zr intermediate alloy, fe-Ba intermediate alloy, fe-Nb intermediate alloy, fe-Ga intermediate alloy, fe-Tl intermediate alloy, fe-Te intermediate alloy, fe-Cu intermediate alloy, fe-Hf intermediate alloy, rare earth element-Fe intermediate alloy, fe-Re intermediate alloy, fe-N intermediate alloy and Fe-B intermediate alloy in a vacuum induction furnace by adopting a conventional steelmaking process, stirring after all raw materials are completely melted to ensure that the alloy components are uniform, adding nano vanadium boride and nano titanium nitride preheated to 830 ℃ into the melted alloy melt, and stirring to ensure that the components are uniform to obtain the doped alloy melt;
step S2, casting and molding by using a sand casting or precision casting process;
and step S3, annealing treatment, normalizing treatment, quenching treatment and tempering treatment are sequentially carried out.
And S4, uniformly mixing the components of the functional coating according to parts by weight, coating the components on the surface of the steel matrix obtained by the S3 treatment, and curing for 3.5 hours at 118 ℃.
The annealing treatment temperature is 910 ℃, the heat preservation time is 4.5h, and the annealing treatment is cooled to below 300 ℃, discharged from the furnace and cooled to room temperature; the normalizing treatment is carried out at 960 ℃ for 5.5 hours and then cooled in air; the quenching treatment temperature is 925 ℃, and water cooling is performed after heat preservation for 5.5 hours; the tempering treatment temperature is 655 ℃, and the tempering treatment is cooled in air after heat preservation for 4.5 hours.
Example 5
A high-toughness cast steel comprises a steel matrix and a functional coating coated on the surface of the steel matrix; the steel matrix comprises the following components in percentage by mass: 0.25% of C, 0.7% of Si, 1.6% of Mn, 1.3% of Cr, 0.3% of Co, 0.1% of Zr, 0.006% of Ba, 0.1% of Nb, 0.03% of Ga, 0.03% of Tl, 0.013% of Te, 0.5% of Cu, 0.015% of Hf, 0.03% of rare earth elements, 0.004% of Re, 0.004% of N, 0.0005% of B, 0.012% of nano vanadium boride and the balance of Fe.
The thickness of the functional coating is 210 mu m; the rare earth element is a mixture formed by mixing Sc, Y, ce, gd according to a mass ratio of 2:1:3:0.5; the steel matrix also comprises the following components in percentage by mass: nano titanium nitride 0.01%; the particle size of the nano vanadium boride is 80nm; the particle size of the nano titanium nitride is 60nm.
The functional coating is prepared from the following raw materials in parts by weight: 10 parts of amino-terminated hyperbranched polybenzimidazole, 50 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer, 3 parts of 4, 4-diaminodiphenyl sulfide and 80 parts of solvent; the amino-terminated hyperbranched polybenzimidazole is prepared by a preparation method of amino-terminated hyperbranched polybenzimidazole in the Chinese invention patent example 3 with the application number of 200510111019.4; the solvent is N, N-dimethylformamide.
The preparation method of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, N-vinylcarbazole, glycidyl methacrylate and an initiator into N, N-dimethylformamide, stirring and reacting for 5 hours at 70 ℃ in an inert gas atmosphere, precipitating in water, washing the precipitated polymer with ethanol for 3-6 times, and finally drying in a vacuum drying oven at 95 ℃ to constant weight to obtain an N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/N-vinylcarbazole/glycidyl methacrylate copolymer; the mass ratio of the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide to the N-vinyl carbazole to the glycidyl methacrylate to the initiator to the N, N-dimethylformamide is 4:3:1.2:0.09:30; the initiator is azodiisobutyronitrile; the inert gas is nitrogen.
The production method of the high-toughness cast steel comprises the following steps:
s1, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Co intermediate alloy, fe-Zr intermediate alloy, fe-Ba intermediate alloy, fe-Nb intermediate alloy, fe-Ga intermediate alloy, fe-Tl intermediate alloy, fe-Te intermediate alloy, fe-Cu intermediate alloy, fe-Hf intermediate alloy, rare earth element-Fe intermediate alloy, fe-Re intermediate alloy, fe-N intermediate alloy and Fe-B intermediate alloy in a vacuum induction furnace by adopting a conventional steelmaking process, stirring after all raw materials are completely melted to ensure that the alloy components are uniform, adding nano vanadium boride and nano titanium nitride preheated to 850 ℃ into the melted alloy melt, and stirring to ensure that the components are uniform to obtain the doped alloy melt;
step S2, casting and molding by using a sand casting or precision casting process;
and step S3, annealing treatment, normalizing treatment, quenching treatment and tempering treatment are sequentially carried out.
And S4, uniformly mixing the components of the functional coating according to parts by weight, coating the components on the surface of the steel matrix obtained through the S3 treatment, and curing for 4 hours at 120 ℃.
The annealing treatment temperature is 920 ℃, the heat preservation time is 5 hours, the annealing treatment is cooled to below 300 ℃, and the annealing treatment is carried out after the annealing treatment is carried out, and the annealing treatment is carried out and cooled to room temperature; the temperature of the normalizing treatment is 970 ℃, and the normalizing treatment is cooled in the air after the heat preservation time is 6 hours; the quenching treatment temperature is 930 ℃, and water cooling is performed after heat preservation for 6 hours; the tempering treatment temperature is 660 ℃, and the tempering treatment is cooled in air after heat preservation for 5 hours.
Comparative example 1
A high-toughness cast steel was substantially the same as in example 1 except that Ba, tl and nano vanadium boride were not added and quenching treatment was not performed.
Comparative example 2
A high-toughness cast steel was substantially the same as in example 1 except that Cr, co, te and nano titanium nitride were not added and 4, 4-diaminodiphenyl sulfide was not added.
To further illustrate the beneficial technical effects of the high-toughness cast steel made in accordance with the examples of the present invention, the high-toughness cast steels made in accordance with examples 1-5 and comparative examples 1-2 were subjected to performance tests, the test results being shown in table 1, wherein,
(1) Room temperature tensile test: referring to national standard GB/T228.1-2010, the method is carried out on a longitudinal and transverse three-Si electronic universal experiment machine, the stretching speed is 0.5mm/min, the inlet force is 10N, each group of experiments is carried out three times, and the average value is obtained; the impact energy is room temperature impact absorption energy KV2.
(2) Evaluation of delayed fracture resistance: the high-toughness cast steel is immersed in 15% (mass fraction) HCl aqueous solution for 30 minutes, washed with water and dried, and then subjected to a certain load, and the load is compared with the load that no fracture occurs for more than 100 hours. In this case, the value obtained by dividing the load at which no fracture occurs 100 hours or more after the acid impregnation by the maximum load at which no acid impregnation is performed in the tensile test is defined as the delayed fracture strength ratio.
(3) Evaluation of corrosion resistance: salt spray corrosion resistance test is carried out on the prepared high-toughness cast steel, the test temperature is 35 ℃, 5 mass percent concentration sodium chloride aqueous solution is sprayed in a test box to simulate the accelerated corrosion of the environment, the tolerance time (namely, the time for keeping the high-toughness cast steel not rusted) is longer than 1200h, namely, the corrosion resistance is qualified, and otherwise, the high-toughness cast steel is unqualified.
TABLE 1
| Project | Tensile strength of | Impact energy | Elongation percentage | Delayed fracture strength ratio | Corrosion resistance |
| Unit (B) | MPa | J | % | — | — |
| Example 1 | 1260 | 52.3 | 14.35 | 0.96 | Qualified product |
| Example 2 | 1278 | 53.6 | 14.58 | 0.98 | Qualified product |
| Example 3 | 1290 | 54.6 | 14.70 | 0.98 | Qualified product |
| Example 4 | 1306 | 55.2 | 14.90 | 0.99 | Qualified product |
| Example 5 | 1326 | 56.0 | 14.95 | 0.99 | Qualified product |
| Comparative example 1 | 1169 | 48.6 | 12.89 | 0.80 | Failure to pass |
| Comparative example 2 | 1197 | 50.1 | 13.15 | 0.85 | Failure to pass |
As can be seen from Table 1, compared with the comparative example product, the high-toughness cast steel disclosed by the embodiment of the invention has more excellent mechanical properties and corrosion resistance; ba. The addition of Tl, nano vanadium boride, quenching treatment, cr, co, te, nano titanium nitride and 4, 4-diaminodiphenyl sulfide is beneficial to improving the performance.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The high-toughness cast steel is characterized by comprising a steel matrix and a functional coating coated on the surface of the steel matrix; the steel matrix comprises the following components in percentage by mass: 0.1 to 0.25 percent of C, 0.2 to 0.7 percent of Si, 0.6 to 1.6 percent of Mn, 0.5 to 1.3 percent of Cr, 0.1 to 0.3 percent of Co, 0.01 to 0.1 percent of Zr, 0.003 to 0.006 percent of Ba, 0.01 to 0.1 percent of Nb, 0.01 to 0.03 percent of Ga, 0.01 to 0.03 percent of Tl, 0.005 to 0.013 percent of Te, 0.3 to 0.5 percent of Cu, 0.01 to 0.015 percent of Hf, 0.01 to 0.03 percent of rare earth element, 0.001 to 0.004 percent of Re, 0.001 to 0.004 percent of N, 0.0001 to 0.0005 percent of B, 0.008 to 0.012 percent of nano vanadium boride and the balance of Fe.
2. The high-toughness cast steel according to claim 1, wherein the functional coating has a thickness of 60-210 μm; the rare earth element is a mixture formed by mixing Sc, Y, ce, gd (1-2) 1 (1-3) and (0.3-0.5) according to the mass ratio.
3. The high-toughness cast steel according to claim 1, wherein the steel matrix further comprises the following components in percentage by mass: 0.003 to 0.01 percent of nano titanium nitride.
4. A high toughness cast steel according to claim 3, wherein the nano vanadium boride has a particle size of 10-80nm; the grain diameter of the nano titanium nitride is 30-60nm.
5. The high-toughness cast steel according to claim 1, wherein the functional coating comprises the following raw materials in parts by weight: 5-10 parts of amino-terminated hyperbranched polybenzimidazole, 40-50 parts of N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer, 1-3 parts of 4, 4-diaminodiphenyl sulfide and 50-80 parts of solvent; the solvent is at least one of N, N-dimethylformamide and N, N-dimethylacetamide.
6. The method for preparing the high-toughness cast steel according to claim 5, wherein the preparation method of the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide/N-vinylcarbazole/glycidyl methacrylate copolymer comprises the following steps: adding N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide, N-vinyl carbazole, glycidyl methacrylate and an initiator into N, N-dimethylformamide, stirring and reacting for 3-5 hours at 60-70 ℃ in an inert gas atmosphere, precipitating in water, washing the precipitated polymer with ethanol for 3-6 times, and finally drying in a vacuum drying oven at 85-95 ℃ to constant weight to obtain the N- (4-cyano-3-trifluoromethyl phenyl) methacrylamide/N-vinyl carbazole/glycidyl methacrylate copolymer.
7. The high-toughness cast steel according to claim 6, wherein the mass ratio of the N- (4-cyano-3-trifluoromethylphenyl) methacrylamide, the N-vinylcarbazole, the glycidyl methacrylate, the initiator and the N, N-dimethylformamide is (2-4): 3 (0.8-1.2): 0.06-0.09): 20-30; the initiator is azodiisobutyronitrile; the inert gas is any one of nitrogen, helium, neon and argon.
8. A method of producing a high-toughness cast steel according to any one of claims 1 to 7, comprising the steps of:
s1, smelting raw materials of Fe, fe-C intermediate alloy, fe-Si intermediate alloy, fe-Mn intermediate alloy, fe-Cr intermediate alloy, fe-Co intermediate alloy, fe-Zr intermediate alloy, fe-Ba intermediate alloy, fe-Nb intermediate alloy, fe-Ga intermediate alloy, fe-Tl intermediate alloy, fe-Te intermediate alloy, fe-Cu intermediate alloy, fe-Hf intermediate alloy, rare earth element-Fe intermediate alloy, fe-Re intermediate alloy, fe-N intermediate alloy and Fe-B intermediate alloy in a vacuum induction furnace by adopting a conventional steelmaking process, stirring after all raw materials are completely melted to ensure that the alloy components are uniform, adding nano vanadium boride and nano titanium nitride preheated to 700-850 ℃ into the molten alloy, and stirring to ensure that the components are uniform to obtain the doped alloy molten solution;
step S2, casting and molding by using a sand casting or precision casting process;
step S3, annealing treatment, normalizing treatment, quenching treatment and tempering treatment are sequentially carried out;
and step S4, uniformly mixing the components of the functional coating according to parts by weight, coating the mixture on the surface of the steel matrix obtained by the treatment of S3, and curing for 2-4 hours at 110-120 ℃.
9. The method for producing high-toughness cast steel according to claim 8, wherein the annealing treatment is carried out at 880-920 ℃, the heat preservation time is 3-5h, and the cast steel is cooled to 300 ℃ or below and discharged from the furnace for air cooling to room temperature; the normalizing treatment is carried out at the temperature of 930-970 ℃ for 4-6 hours and then cooled in air.
10. The method for producing high-toughness cast steel according to claim 8, wherein the quenching treatment temperature is 910-930 ℃, and water cooling is performed after heat preservation for 4-6 hours; the tempering treatment temperature is 640-660 ℃, and the tempering treatment is cooled in air after heat preservation for 3-5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310545884.8A CN116377336A (en) | 2023-05-16 | 2023-05-16 | High-toughness cast steel and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310545884.8A CN116377336A (en) | 2023-05-16 | 2023-05-16 | High-toughness cast steel and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116377336A true CN116377336A (en) | 2023-07-04 |
Family
ID=86980840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310545884.8A Pending CN116377336A (en) | 2023-05-16 | 2023-05-16 | High-toughness cast steel and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116377336A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875307A (en) * | 2022-04-02 | 2022-08-09 | 宁波金鼎紧固件有限公司 | High-strength corrosion-resistant bolt material and preparation method thereof |
-
2023
- 2023-05-16 CN CN202310545884.8A patent/CN116377336A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875307A (en) * | 2022-04-02 | 2022-08-09 | 宁波金鼎紧固件有限公司 | High-strength corrosion-resistant bolt material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102516710B1 (en) | A type of steel for wind turbine main shaft bearing and manufacturing method | |
| CN108342641B (en) | 630 MPa-level hot-rolled high-strength anti-seismic reinforcing steel bar and production method thereof | |
| CN109852880A (en) | A kind of high heat-intensity hot-work die steel and its manufacturing method | |
| WO2022052335A1 (en) | Thick low-carbon-equivalent high-toughness wear-resistant steel plate and manufacturing method therefor | |
| CN111155031A (en) | Atmospheric corrosion resistant high-strength bolt and manufacturing method thereof | |
| CN106086657A (en) | A kind of yield strength ultra high-strength structural steel plate more than 1300MPa and preparation method thereof | |
| CN115747655A (en) | High-strength material for fasteners and preparation method thereof | |
| CN107164661A (en) | A kind of high corrosion resistance aluminum alloy composite and preparation method thereof | |
| CN108048741A (en) | hot rolled bainite steel rail and preparation method thereof | |
| CN104178771A (en) | Heat treatment and surface treatment method of mold steel SDCM1 for hot stamping | |
| CN113913683A (en) | High-strength nut material and preparation method thereof | |
| CN105886911A (en) | Preparation technology of high-strength high-toughness wear-resistant lining plate of semi-autogenous mill | |
| CN1861831A (en) | 1100Mpa grade non modified high-strength steel and production process thereof | |
| CN109295391B (en) | High-strength and high-toughness non-quenched and tempered steel and preparation method thereof | |
| CN105220066B (en) | Nanometer pearlite steel and preparation method thereof | |
| CN104264052A (en) | Steel plate for engineering machinery and production method of steel plate | |
| CN116377336A (en) | High-toughness cast steel and production method thereof | |
| CN104313471A (en) | Prestressed reinforcement with low yield ratio, and heat treatment method therefor | |
| CN104651735A (en) | Low-alloy wear-resistant steel with toughness being more than 50J/cm<2> and production method thereof | |
| CN105779893B (en) | Alloy cast steel for brake disc of high-speed train and the brake disc of high-speed train that is manufactured by the alloy cast steel | |
| CN102994906A (en) | Preparation method of ball valve body | |
| CN116121644A (en) | High-toughness mine disc saw blade steel plate and manufacturing method thereof | |
| CN113789477B (en) | Cast steel shot with low-carbon martensite structure and preparation process thereof | |
| CN114196875B (en) | Stainless steel for valve plate and heat treatment method thereof | |
| CN114941068A (en) | Preparation method of rare earth microalloyed high-toughness 960 MPa-grade ultrahigh-strength steel |
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 |