CN113789468A - Wear-resistant corrosion-resistant steel plate for silt conveying pipeline and preparation method thereof - Google Patents
Wear-resistant corrosion-resistant steel plate for silt conveying pipeline and preparation method thereof Download PDFInfo
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- 239000010935 stainless steel Substances 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 238000005260 corrosion Methods 0.000 claims abstract description 21
- 230000007797 corrosion Effects 0.000 claims abstract description 21
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 6
- 239000013049 sediment Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 239000011780 sodium chloride Substances 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000005096 rolling process Methods 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 8
- 230000000171 quenching effect Effects 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 7
- 238000005496 tempering Methods 0.000 claims description 7
- 238000009749 continuous casting Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007670 refining Methods 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 239000013535 sea water Substances 0.000 abstract description 6
- 230000002378 acidificating effect Effects 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract description 4
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 2
- 229910052787 antimony Inorganic materials 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the 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
- C22C38/04—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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/18—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
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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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention disclosesA wear-resistant corrosion-resistant steel plate for a silt conveying pipeline and a preparation method thereof belong to the technical field of alloy steel, and the steel plate comprises the following chemical components in percentage by mass: c: 0.10 to 0.25 percent; mn: 0.5-1.5%; si: 0.2 to 0.5 percent; cr: 0.50-2.0%; ni: 0.8-2.0%; mo: 0.3 to 0.8 percent; cu: 0.5-2.0%; sb: 0.08-0.12%; al: 0.5-1.0%; s is less than or equal to 0.03 percent; p is less than or equal to 0.03 percent; the balance being Fe and unavoidable impurity elements. The steel plate has the hardness range of HB375-HB475, namely 3.5 percent of NaCl and 5 percent of H2SO4The corrosion resistance of the solution or the 3.5 percent HCL solution can be more than 4 times of that of the conventional NM 450. The welding performance of the steel plate is equivalent to that of the traditional wear-resistant steel, and the steel plate is particularly suitable for preparing the wear-resistant corrosion-resistant steel for the sediment conveying pipeline in seawater or an acidic environment.
Description
Technical Field
The invention belongs to the technical field of alloy steel, and particularly relates to a wear-resistant corrosion-resistant steel plate for a silt conveying pipeline and a preparation method thereof.
Background
The silt conveying pipeline is affected by complex environment (such as seawater corrosion, complex soil quality of sand mixed pebbles and the like), and the corrosion, abrasion and failure are serious. Frequent replacement of the pipeline leads to reduction of construction efficiency and improvement of construction cost. In order to improve the wear resistance of pipelines and prolong the service life of the pipelines, a corrosion-resistant wear-resistant steel which is resistant to seawater and acidic environment corrosion, high in hardness, capable of being formed and welded is urgently needed.
Disclosure of Invention
In view of the above, the present invention aims to provide a martensite wear-resistant steel plate resistant to corrosion of seawater and an acidic environment and a preparation method thereof, so as to solve the problem that the wear resistance and the corrosion resistance of the steel plate cannot be considered at the same time in the prior art.
In order to achieve the purpose, the invention provides a wear-resistant corrosion-resistant steel plate for a silt conveying pipeline, namely, the chemical components of the martensite wear-resistant steel plate resisting corrosion and wear comprise the following components in percentage by mass: c: 0.10 to 0.25 percent; mn: 0.5-1.5%; si: 0.2 to 0.5 percent; cr: 0.50-2.0%; ni: 0.8-2.0%; mo: 0.3 to 0.8 percent; cu: 0.5-2.0%; 0.08 to 0.12 percent of Sb; al: 0.5-1.0%; s is less than or equal to 0.03 percent; p is less than or equal to 0.03 percent; (ii) a The balance of iron and inevitable impurity factors;
preferably, the wear-resistant corrosion-resistant steel plate for the sediment transport pipeline comprises the following chemical components in percentage by mass: 0.13 to 0.20 percent; mn: 0.5-1.0%; si: 0.2 to 0.5 percent; cr: 0.50-1.0%; ni: 0.8 to 1.0 percent; mo: 0.3 to 0.5 percent; cu: 0.5-1.0%; 0.08 to 0.12 percent of Sb; al: 0.5-1.0%; s is less than or equal to 0.03 percent; p is less than or equal to 0.03 percent; the balance being Fe and unavoidable impurity elements.
The action and the proportion of each element of the invention are as follows:
carbon: the hardenability of the steel is improved, the strong solid solution strengthening effect is achieved, and the strength and the hardness of the martensitic steel are obviously improved; according to the capability of the current processing and bending equipment, the carbon content is selected to be 0.15-0.25%, and the surface hardness of the steel plate after heat treatment is HB 400-450.
Silicon: one of the deoxidizing elements in the steel has a certain solid solution strengthening effect, but the excessive silicon is unfavorable for the toughness and the welding performance of the steel. In combination with the above considerations, the silicon content of the steel of the invention ranges from 0.20 to 0.50 wt.%.
Manganese: obviously improves the hardenability of the steel and has certain solid solution strengthening effect. However, when the manganese content is high, the tendency to segregate in the cast slab increases, the susceptibility to temper embrittlement of the steel increases, and the welding performance is also unfavorable. The manganese content of the steel of the invention ranges from 0.50 to 1.00 wt.%.
Molybdenum: the hardenability of the steel is obviously improved, the temper brittleness is reduced, and the ions can automatically supplement gaps formed by point corrosion of Cl (chlorine) ions to the steel in seawater to form a compact protective layer so as to prevent the point corrosion from developing to the depth. Thereby playing a role of resisting pitting corrosion. The molybdenum content is controlled according to the invention in the range of 0.30-0.8 wt.%, preferably 0.30-0.50 wt.%.
Chromium: the hardenability and the resistance to corrosive wear of the steel are improved, but too high chromium reduces the workability and weldability, the invention controlling the chromium content in the range of 0.50-1.0 wt.%.
Nickel: the hardenability of the steel is improved, the low-temperature toughness is obviously improved, and the corrosion resistance of the steel is improved. The nickel content is controlled in the range of 0.8-1.0 wt.% in the invention.
Copper: the hardenability and the corrosion resistance of the steel are improved, and the wear resistance can be obviously improved under the corrosive wear environment. The copper content of the steel of the invention is controlled in the range of 0.5-1.0 wt.%.
Antimony: sb and Cr are added in a compounding manner to be enriched in the rust layer in a synergic manner, and a compact oxide film which is higher than a matrix by times and rich in elements such as Sb and Cr is formed, so that the transmission of etching ions is obviously hindered, and the corrosion environment with coexisting sulfate radicals and chloride ions is more resistant; however, excessive antimony content may adversely affect hot workability, weldability, and toughness of the steel sheet, and the antimony content of the steel of the present invention is controlled to be in the range of 0.08 to 0.12 wt.%.
Aluminum: can react with oxygen in the air to generate aluminum oxide, and is corrosion-resistant and corrosion-resistant. The invention controls the aluminum content to be in the range of 0.5-1.0 wt.%.
Phosphorus and sulfur as impurity elements seriously damage the toughness and plasticity of steel, and the content is respectively controlled to be less than or equal to 0.005 wt% of S and less than or equal to 0.015 wt% of P.
The invention provides a preparation method of a wear-resistant corrosion-resistant steel plate, which sequentially comprises the following steps: continuously casting (die casting) a plate blank after the molten steel is subjected to KR method desulfurization, converter or electric furnace smelting and external refining treatment; wherein the continuous casting step comprises: the continuous casting speed is 0.8-1.3m/min, the heating temperature is 1100-1300 ℃, and the heat preservation time is 2-5 hours; the thickness of the plate blank is 5-50 mm.
2) After continuously casting (die casting) a slab, sequentially carrying out heating, controlled rolling, controlled cooling and heat treatment, wherein the hot rolling slab rolling step comprises the following steps: and (3) reheating the slab, namely heating the slab in a heating furnace after the continuous casting slab or the cast ingot is cogging, wherein the heating temperature is 1100-1300 ℃, and the time is 2-5 hours. The production method is characterized by adopting a heavy and medium plate mill for rolling production, and the rolling steps comprise: 4-8 passes of rough rolling and 7-14 passes of finish rolling, wherein the finish rolling temperature of the finish rolling is 830-880 ℃, the cooling comprises air cooling or accelerated cooling after rolling, and the finish cooling temperature is 300-700 ℃. Straightening the steel plate in the air cooling process or after accelerated cooling.
And (3) carrying out heat treatment on the steel plate, including quenching and tempering.
And (3) quenching and heating at 880-900 ℃ for 30-60 minutes, and heating the steel plate and then performing water quenching. The overhigh heating temperature coarsens austenite grains, and reduces the toughness and plasticity of the steel; too low heating temperature significantly lowers the hardenability of steel and the core hardness of thick steel plate, which is not good for wear resistance.
The tempering temperature is 150-.
Compared with the prior art, the invention has the following beneficial effects:
through the process, the method is suitable for preparing the wear-resistant and corrosion-resistant steel for the sediment conveying pipeline in the seawater or acidic environment. The matrix structure of the wear-resistant steel is lath martensite, the tensile strength of the corrosion-resistant martensite wear-resistant steel plate is 1250MPa-1450MPa, the hardness is HRB375-475, preferably, the hardness range of the steel plate is HB400-HB450, the elongation is 6% -13%, the impact energy at the temperature of minus 20 ℃ is 30J-60J, and the work efficiency is 3.5% NaCl + 5% H2SO4The corrosion resistance of the solution or the 3.5 percent HCL solution can be more than 4 times of that of the conventional NM400 or NM 450; the machining performance and the welding performance are excellent, and the manufacturing requirements of the silt conveying pipeline can be met.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The chemical composition of the invention is C: 0.15 percent; mn: 0.55 percent; si: 0.25 percent; cr: 0.65 percent; ni: 0.88 percent; mo: 0.35 percent; cu: 0.58 percent; sb: 0.10 percent; al: 0.85 percent; s is less than or equal to 0.03 percent; p is less than or equal to 0.03 percent; the manufacturing process comprises the following steps: KR desulfurization, converter smelting, LF refining, RH refining, slab continuous casting, rolling by adopting a heavy and medium plate mill, heating by a heating furnace at 1200 ℃, finish rolling at 860 ℃, rolling at 30mm in thickness, and air cooling after rolling. The heat treatment process comprises the following steps: austenitizing temperature is 880 ℃, heat preservation time is 1 hour, water quenching is carried out to room temperature, and then tempering is carried out for 2 hours at 200 ℃ and air cooling is carried out to room temperature.
Example 2
The chemical composition of the invention is C: 0.18 percent; mn: 0.72 percent; si: 0.33 percent; cr: 0.93 percent; ni: 0.80 percent; mo: 0.35 percent; cu: 0.65 percent; sb: 0.10 percent; al: 0.78%; s is less than or equal to 0.03 percent; p is less than or equal to 0.03 percent; the manufacturing process comprises the following steps: KR desulfurization, converter smelting, LF refining, RH refining, slab continuous casting, rolling by adopting a heavy and medium plate mill, heating by a heating furnace at 1200 ℃, finish rolling at 860 ℃, rolling at the thickness of 16mm, and air cooling after rolling. The heat treatment process comprises the following steps: austenitizing temperature is 880 ℃, heat preservation time is 0.5 hour, water quenching is carried out to room temperature, then tempering is carried out for 1 hour at 200 ℃, and air cooling is carried out to room temperature.
The embodiment of the invention is compared with NM400 and NM450 mechanical properties and corrosion resistance
Conventional technical knowledge in the art can be used for the details which are not described in the present invention.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. The wear-resistant corrosion-resistant steel plate for the sediment conveying pipeline is characterized by comprising the following chemical components in percentage by mass: c: 0.10 to 0.25 percent; mn: 0.5-1.5%; si: 0.2 to 0.5 percent; cr: 0.50-2.0%; ni: 0.8-2.0%; mo: 0.3 to 0.8 percent; cu: 0.5-2.0%; sb: 0.08-0.12%; al: 0.5-1.0%; s is less than or equal to 0.03 percent; p is less than or equal to 0.03 percent; the balance being Fe and unavoidable impurity elements.
2. The corrosion-resistant and wear-resistant steel plate for the sediment transport pipeline as claimed in claim 1, wherein the tensile strength of the acid corrosion-resistant steel plate is 1350MPa to 1450MPa, the hardness of the steel plate is HRB375 to 475, the elongation of the steel plate is 13% to 16%, the impact energy at-20 ℃ is 30J to 60J, and the impact energy is measured in the range of 3.5% NaCl + 5% H2SO4The corrosion resistance of the solution or the 3.5 percent HCL solution can reach more than 4 times of that of the conventional NM400 or NM 450.
3. A method for preparing a wear-resistant corrosion-resistant steel plate for a sediment transport pipeline as claimed in claim 1 or 2, comprising the steps of:
1) continuously casting the plate blank after molten steel is subjected to molten iron desulfurization, converter or electric furnace smelting and external refining treatment, wherein the continuous casting drawing speed is 0.8-1.3m/min, the heating temperature is 1100-1300 ℃, and the heat preservation time is 2-5 hours;
2) heating, rolling, cooling and heat treatment are sequentially carried out after the slab is continuously cast, wherein the heating temperature is 1100-1300 ℃, and the heat preservation time is 2-5 hours; 4-7 times of rough rolling and 7-14 times of finish rolling, wherein the finish rolling temperature is 830-880 ℃; the heat treatment includes quenching and tempering.
4. The manufacturing method according to claim 3, wherein the thickness of the slab in the step 1) is 5-50 mm.
5. The method as claimed in claim 3, wherein the cooling in step 2) comprises air cooling or accelerated cooling after rolling, and the final cooling temperature is 300-700 ℃.
6. The preparation method according to claim 3, wherein the quenching heating temperature in the step 2) is 880-900 ℃, the quenching heat preservation time is 30-60 min, the tempering temperature is 150-200 ℃, and the tempering heat preservation time is 40-60 min.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110897784.2A CN113789468A (en) | 2021-08-05 | 2021-08-05 | Wear-resistant corrosion-resistant steel plate for silt conveying pipeline and preparation method thereof |
| PCT/CN2021/118787 WO2023010655A1 (en) | 2021-08-05 | 2021-09-16 | Wear-resistant and corrosion-resistant steel plate for sediment transport pipeline, and preparation method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110897784.2A CN113789468A (en) | 2021-08-05 | 2021-08-05 | Wear-resistant corrosion-resistant steel plate for silt conveying pipeline and preparation method thereof |
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| CN113789468A true CN113789468A (en) | 2021-12-14 |
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| WO (1) | WO2023010655A1 (en) |
Cited By (2)
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| CN115838897A (en) * | 2022-11-18 | 2023-03-24 | 莱芜钢铁集团银山型钢有限公司 | Martensite wear-resistant corrosion-resistant steel pipe for 415 HB-level sediment conveying pipeline and preparation method thereof |
| CN115852270A (en) * | 2022-11-18 | 2023-03-28 | 莱芜钢铁集团银山型钢有限公司 | Double-phase wear-resistant corrosion-resistant steel pipe for sediment conveying pipeline and preparation method thereof |
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| CN115838897A (en) * | 2022-11-18 | 2023-03-24 | 莱芜钢铁集团银山型钢有限公司 | Martensite wear-resistant corrosion-resistant steel pipe for 415 HB-level sediment conveying pipeline and preparation method thereof |
| CN115852270A (en) * | 2022-11-18 | 2023-03-28 | 莱芜钢铁集团银山型钢有限公司 | Double-phase wear-resistant corrosion-resistant steel pipe for sediment conveying pipeline and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| WO2023010655A1 (en) | 2023-02-09 |
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