CN114075640A - High-corrosion-resistance austenitic stainless steel and manufacturing method thereof - Google Patents
High-corrosion-resistance austenitic stainless steel and manufacturing method thereof Download PDFInfo
- Publication number
- CN114075640A CN114075640A CN202010814407.3A CN202010814407A CN114075640A CN 114075640 A CN114075640 A CN 114075640A CN 202010814407 A CN202010814407 A CN 202010814407A CN 114075640 A CN114075640 A CN 114075640A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- austenitic stainless
- less
- equal
- corrosion
- 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
- 229910000963 austenitic stainless steel Inorganic materials 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000005260 corrosion Methods 0.000 claims abstract description 71
- 230000007797 corrosion Effects 0.000 claims abstract description 71
- 239000000126 substance Substances 0.000 claims abstract description 17
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 238000005504 petroleum refining Methods 0.000 claims abstract description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 7
- 239000010935 stainless steel Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000009749 continuous casting Methods 0.000 claims description 22
- 238000005096 rolling process Methods 0.000 claims description 20
- 238000003723 Smelting Methods 0.000 claims description 11
- 238000004512 die casting Methods 0.000 claims description 11
- 238000005098 hot rolling Methods 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 10
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005261 decarburization Methods 0.000 claims description 8
- 238000005554 pickling Methods 0.000 claims description 8
- 238000007670 refining Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 19
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 11
- 238000002360 preparation method Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 9
- 239000002912 waste gas Substances 0.000 abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 31
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 21
- 239000011651 chromium Substances 0.000 description 17
- 239000000243 solution Substances 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 229910001566 austenite Inorganic materials 0.000 description 10
- 239000011572 manganese Substances 0.000 description 10
- 229910052804 chromium Inorganic materials 0.000 description 9
- 229910052759 nickel Inorganic materials 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 239000011733 molybdenum Substances 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000002436 steel type Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- C21D8/0226—Hot rolling
-
- 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
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention belongs to the field of stainless steel materials, and relates to high-corrosion-resistance austenitic stainless steel and a manufacturing method thereof, wherein the stainless steel comprises the following chemical components in percentage by weight: c: less than or equal to 0.020, Si: less than or equal to 0.5, Mn: 2.0 or less, P: 0.025 or less, S: less than or equal to 0.010, Ni: 21.5 to 23.5, Cr: 22.0 to 24.0, Mo: 5.0-6.0, N: 0.25 to 0.35, Cu: 0.5 to 1.5, W: less than or equal to 1.0, the balance of Fe and inevitable impurities, and the PREN value is more than or equal to 45(PREN ═ Cr% +3.3 Mo% + 16N%). The high corrosion resistant austenitic stainless steel plate has reasonable control on Mo and N content, has better manufacturability, has excellent corrosion resistance, and can be applied to the preparation of equipment for harsh corrosion environments such as energy chemical industry, waste gas treatment, petroleum refining and the like.
Description
Technical Field
The invention belongs to the field of stainless steel materials, relates to high-corrosion-resistance austenitic stainless steel, and particularly relates to an austenitic stainless steel hot rolled plate and coil with excellent corrosion resistance and a manufacturing method thereof.
Background
With the rapid development of modern industry, in order to further improve the production efficiency, reduce the energy consumption and meet the environmental protection requirement, the equipment of modern industry, especially the industries of energy chemical industry, waste gas treatment, petroleum refining and the like, has more and more strict working conditions, and the requirements on the corrosion resistance and the service life of materials are all higher.
At present, 300 series of widely used austenitic stainless steels at home and abroad are taken as the main materials, the steel types have good comprehensive performance and cost performance, but the corrosion resistance of the steel types is poor, and the steel types can not be applied to severe corrosion environments, so that the super austenitic stainless steel with higher Cr, Mo, Ni and N contents is rapidly developed, in the conventional high-corrosion-resistance austenitic stainless steel, the content of Mo in steel types such as super austenitic N08367 and the like which meet the PREN index of more than or equal to 45 is higher, and the plasticity during hot working is poor due to the easy segregation of the Mo content.
Application number 201810640765.X discloses high-strength and high-corrosion-resistance austenitic stainless steel, which is characterized in that: the raw materials of the austenitic stainless steel comprise, by mass, not more than 0.1% of C, not more than 2% of Si, not more than 7% of Mn, not more than 0.1% of S, not more than 0.1% of P, and Cr: 28-35%, Ni: 26-32%, Mo: 3-8%, N: 0.2-0.5%, the balance of Fe and inevitable impurities, Ni/Mn is more than or equal to 4, and PREN (Cr +3.3 Mo + 16N) is more than or equal to 43. The steel grade obtains a solid solution state austenite structure with higher dislocation density by selecting high Cr, high Mo, high N and high Ni contents, and realizes the great improvement of the strength of austenitic stainless steel. The steel grade has high alloy content, so that the production cost is high, and in addition, the manufacturing difficulty is increased sharply due to high Mo and high N.
Application No. 201610938389.3 relates to a method for producing a high corrosion resistance high nitrogen super austenitic stainless steel, the smelting target austenitic stainless steel comprises the following components: c: less than or equal to 0.02%, Si: less than or equal to 0.5 percent, Mn: 2.0-4.0%, Cr: 24.0 to 25.0%, Ni: 21.0 to 23.0%, Mo: 7.0-8.0%, Cu: 0.3-0.6%, N: 0.45-0.55%, S: less than or equal to 0.005%, P: less than or equal to 0.03%, Fe: and (4) the balance. The chemical components related to the invention are high Mo and high N S32654, the manufacturing method is a method for producing high corrosion resistance high nitrogen super austenitic stainless steel by blowing nitrogen gas at the bottom of a vacuum induction furnace, and the components and the manufacturing method are not covered by the alloy.
The invention describes high-corrosion-resistance austenitic stainless steel with better manufacturability, which can be applied to equipment for preparing harsh corrosion environments such as energy chemical industry, waste gas treatment, petroleum refining and the like.
Disclosure of Invention
The invention aims to provide high-corrosion-resistance austenitic stainless steel and a manufacturing method thereof, so that the material has better manufacturability and excellent corrosion resistance.
The technical scheme of the invention is as follows:
the chemical components (weight percentage) of the high corrosion resistant austenitic stainless steel are as follows: c: less than or equal to 0.020, Si: less than or equal to 0.5, Mn: 2.0 or less, P: 0.025 or less, S: less than or equal to 0.010, Ni: 21.5 to 23.5, Cr: 22.0 to 24.0, Mo: 5.0-6.0, N: 0.25 to 0.35, Cu: 0.5 to 1.5, W: less than or equal to 1.0, the balance of Fe and inevitable impurities, and the PREN value is more than or equal to 45(PREN ═ Cr% +3.3 Mo% + 16N%).
According to the high corrosion resistant austenitic stainless steel, the weight percentage wt% of Cr is preferably 22.5-23.5.
According to the high-corrosion-resistance austenitic stainless steel, the weight percentage wt% of Mo is more preferably 5.2-5.8.
According to the high-corrosion-resistance austenitic stainless steel, the weight percentage wt% of N is further preferably 0.27-0.32.
According to the high corrosion resistant austenitic stainless steel, the weight percentage wt% of Cu is preferably 0.7-1.2; the weight percentage of W is less than or equal to 0.8.
According to the high corrosion resistant austenitic stainless steel, the weight percentage of P is more than or equal to 0.020; the weight percentage of S is less than or equal to 0.005; the weight percentage wt% of Ni is 22.0-23.0.
The chemical components (weight percentage) of the high corrosion resistant austenitic stainless steel are as follows more preferably: c: 0.015 or less, Si: less than or equal to 0.35, Mn: 1.0 or less, P: less than or equal to 0.020, S: 0.005 or less, Ni: 22.0-23.0, Cr: 22.5 to 23.5, Mo: 5.2-5.8, N: 0.27 to 0.32, Cu: 0.7 to 1.2, W: not more than 0.8, the balance of Fe and inevitable impurities, and the PREN value is not less than 45(PREN ═ Cr% +3.3 Mo% + 16N%).
The invention also provides a manufacturing method of the high corrosion resistant austenitic stainless steel, and also provides a method for manufacturing the austenitic stainless steel hot rolled plate and coil with better manufacturability and excellent corrosion resistance, and the method comprises the following steps:
according to the requirements of the chemical components, smelting in a mode of an EAF (electric furnace), an AOD (argon oxygen decarburization furnace) and an LF (ladle refining furnace), and continuously casting or die casting a flat ingot, wherein the superheat degree of continuous casting is controlled to be less than 50 ℃;
putting a continuous casting slab or a die casting slab ingot into a stepping heating furnace for heating, controlling the heating temperature to 1150-1250 ℃, and carrying out hot rolling on a rolling mill to form a plate and a coil with required specifications, wherein the final rolling temperature is controlled to 900-1000 ℃; and (3) carrying out solution treatment on the hot rolled plate and the coil, controlling the temperature of the solution treatment at 1100-1200 ℃, and finally carrying out acid pickling to obtain a finished product of the high-corrosion-resistance austenitic stainless steel hot rolled plate and coil.
The pitting corrosion rate (g/cm2) of the high-corrosion-resistance austenitic stainless steel is less than 0.0001, and the hot rolling edge crack is less than 5 mm.
The invention also provides application of the high-corrosion-resistance austenitic stainless steel in preparation of equipment for harsh corrosion environments such as energy chemical industry, waste gas treatment, petroleum refining and the like.
The reason for determining the chemical components in the technical scheme of the invention is as follows:
carbon: is a strong austenite forming element and can improve the strength of steel. When the carbon content is too high, the corrosion performance and the toughness are obviously reduced, and the difficulty and the cost in the preparation process are increased by the too low carbon content, so that the carbon content is preferably less than or equal to 0.020%.
Silicon: is ferrite forming element and can be effectively used as deoxidizer, but the excessive addition can reduce the corrosion resistance of the alloy and deteriorate the processing and toughness, so the addition of silicon is controlled to be less than or equal to 0.5 percent.
Manganese: is a weak austenite element, plays a role in stabilizing austenite, and in addition, the addition of manganese can obviously improve the solubility of nitrogen. Too high manganese is not good for corrosion resistance, so the manganese content should be controlled to be less than or equal to 2.0%.
Phosphorus: is an impurity element in the steel, and the lower the content of the impurity element is, the better the thermoplasticity and the corrosion resistance are considered, but the lower the control can cause higher cost, so the phosphorus is controlled to be less than or equal to 0.025 percent.
Sulfur: is an impurity element in the steel, and the content of the impurity element is better from the viewpoint of thermoplasticity and corrosion resistance, so that the content of sulfur is controlled to be less than or equal to 0.010 percent.
Chromium: the important element for improving the corrosion resistance can improve the corrosion resistance of the stainless steel in oxidizing acid and improve the local corrosion resistance of the stainless steel in chloride solution, such as stress corrosion resistance, pitting corrosion resistance, crevice corrosion resistance and the like. If the amount is too low, the corrosion resistance is poor, and the solubility of nitrogen is not favorable, but if the amount is too high, the tendency of ferrite and intermetallic compounds to precipitate increases, and therefore, it is preferably 22.0 to 24.0%.
Nickel: as an element for strongly forming and expanding an austenite region, the stability of an austenite structure can be improved, the nonmagnetic property is favorably ensured, the hot workability is improved, the nickel has better effects of improving the uniform corrosion and stress corrosion cracking resistance sensitivity in an oxidation and reduction medium, but the price of the nickel is higher, so the content of the nickel is preferably controlled to be 21.5-23.5%.
Molybdenum: the element is ferrite-forming element, which can improve the high-temperature strength and the corrosion resistance of the alloy, especially in the case of the complex action with chromium, the pitting corrosion resistance equivalent is 3.3 times of that of chromium, but too high is easy to aggravate segregation and influence thermoplasticity, and the price of molybdenum is high, so the element is preferably controlled to be 5.0-6.0%.
Copper: elements that improve corrosion resistance are particularly advantageous in the environment of reducing acids. However, the copper content is preferably controlled to 0.5 to 1.5% because it is not preferable to improve the strength of the material and to lower the hot workability of the steel.
Tungsten: the corrosion resistance and strength of the steel can be improved. However, when the content of tungsten is too high, the intermetallic phase is promoted to be generated, and the cost is high, so that the addition of tungsten is controlled to be less than or equal to 1.0 percent.
Nitrogen: the nitrogen is a strong austenite forming element, the austenite forming capacity of the nitrogen is far higher than that of nickel, the nitrogen is beneficial to stabilizing an austenite phase and improving high-temperature strength, the nitrogen can replace Ni to obviously reduce the cost, and secondly, the nitrogen can improve the corrosion resistance of the austenite phase, especially the pitting corrosion resistance and the crevice corrosion resistance, but the too high nitrogen can cause smelting difficulty, increase the risk of nitride formation and reduce the toughness and the corrosion resistance of the material, so the nitrogen is preferably controlled to be 0.25-0.35%.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following characteristics and positive effects:
chromium, molybdenum and nitrogen are important elements for improving the corrosion resistance of austenitic stainless steel, the high chromium content is controlled to be 22.0-24.0% and the high nitrogen content is controlled to be 0.25-0.35%, the molybdenum content is properly reduced to be 5.0-6.0%, the segregation degree of a smelting ingot is reduced due to the low molybdenum content while the high PREN value is larger than or equal to 45, in addition, the proper copper and tungsten content is controlled, the corrosion resistance under a severe environment is favorably improved, the low phosphorus and sulfur content and the proper nickel content are controlled, and the good hot working plasticity is favorably obtained, so the austenitic stainless steel has excellent corrosion resistance, the manufacturability is better, and the manufacturing cost is reduced.
The high corrosion resistant austenitic stainless steel can be produced in batch by using an alloy plate strip production line, and the specific preparation method comprises the following steps:
1. smelting in the modes of an EAF (electric furnace), an AOD (argon oxygen decarburization furnace) and an LF (ladle refining furnace), continuously casting or die casting a flat ingot, and controlling the superheat degree of continuous casting to be less than 50 ℃;
2. putting a continuous casting billet or a die casting slab ingot into a stepping heating furnace for heating, controlling the heating temperature to 1150-1250 ℃, hot-rolling the continuous casting billet or the die casting slab ingot into a plate or a coil with required specification on a rolling mill, controlling different controlled rolling processes according to different plate thicknesses, controlling the final rolling temperature to 900-1000 ℃, and ensuring that the high molybdenum phase of the steel is eliminated, good hot-working thermoplasticity is kept and good hot-rolled plate or coil shape is controlled by controlling proper heating temperature and final rolling temperature;
3. and (3) carrying out solution treatment on the hot rolled plate and the hot rolled coil, controlling the solution treatment temperature to be 1100-1200 ℃, enabling the hot rolled plate and the hot rolled coil to obtain a good recrystallization structure in the temperature range, reasonably matching indexes such as strength, plasticity, corrosion resistance and the like, and finally carrying out acid pickling to obtain a finished product of the heat-resistant austenitic stainless steel hot rolled plate and the heat-resistant austenitic stainless steel coil.
Due to reasonable chemical component design and proper controlled rolling process, the produced austenitic stainless steel plate and the produced austenitic stainless steel coil product have excellent corrosion resistance, so that the austenitic stainless steel coil can be applied to equipment for preparing harsh corrosion environments such as energy chemical industry, waste gas treatment, petroleum refining and the like.
In summary, the highly corrosion-resistant austenitic stainless steel provided by the invention is provided according to the above reasons, and the highly corrosion-resistant austenitic stainless steel has good manufacturability through chemical composition design and manufacturing process control, can produce hot rolled plates and coils with excellent corrosion resistance, and can be applied to equipment for preparing severe corrosion environment applications such as energy chemical industry, waste gas treatment, petroleum refining and the like.
Detailed Description
The technical solutions of the present invention are further illustrated below with reference to specific examples, and it should be clear that these examples are only used for describing the specific embodiments of the present invention, and are not intended to limit the scope of the present invention in any way.
Table 1 shows the composition of example steels of the present invention and comparative steels, the balance being iron. Table 2 shows the properties of the example steels of the present invention and the comparative example steels.
Table 1 example and comparative example ingredients, balance iron (wt.%)
Patent application | C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu | W | PREN |
Example 1 | 0.018 | 0.25 | 0.66 | 0.022 | 0.001 | 22.1 | 21.9 | 5.4 | 0.33 | 0.70 | 0.7 | 45.20 |
Example 2 | 0.015 | 0.35 | 0.45 | 0.019 | 0.001 | 22.6 | 22.8 | 5.7 | 0.28 | 0.58 | 0.1 | 45.89 |
Example 3 | 0.016 | 0.31 | 0.53 | 0.020 | 0.001 | 23.5 | 22.2 | 5.1 | 0.34 | 1.23 | 0.5 | 45.77 |
Example 4 | 0.013 | 0.38 | 0.89 | 0.017 | 0.001 | 23.9 | 21.6 | 5.3 | 0.31 | 1.40 | 0.2 | 46.35 |
Example 5 | 0.017 | 0.22 | 0.71 | 0.021 | 0.001 | 23.0 | 23.3 | 5.9 | 0.26 | 0.96 | 0.4 | 46.63 |
Comparative example 1 | 0.020 | 0.35 | 0.52 | 0.022 | 0.001 | 20.4 | 24.6 | 6.7 | 0.19 | 0.43 | - | 45.55 |
Example 1
The components of the high corrosion resistant austenitic stainless steel according to the present invention are listed in table 1, and the specific preparation method comprises:
1. smelting by adopting the modes of an EAF (electric furnace), an AOD (argon oxygen decarburization furnace) and an LF (ladle refining furnace), continuously casting a continuous casting billet with the thickness of 200mm, and controlling the superheat degree of the continuous casting to be less than 50 ℃;
2. putting the continuous casting slab into a stepping heating furnace for heating, controlling the heating temperature to 1190 ℃, hot rolling the continuous casting slab on a rolling mill into a 15mm hot rolled plate, and controlling the final rolling temperature to 950 ℃;
3. and (3) carrying out solution treatment on the hot rolled plate, controlling the temperature of the solution treatment to be 1150 ℃, and finally carrying out acid pickling to obtain a high-corrosion-resistance austenitic stainless steel hot rolled plate finished product, wherein the product performance is shown in Table 2.
Example 2
The components of the high corrosion resistant austenitic stainless steel according to the present invention are listed in table 1, and the specific preparation method comprises:
1. smelting by adopting the modes of an EAF (electric furnace), an AOD (argon oxygen decarburization furnace) and an LF (ladle refining furnace), continuously casting a continuous casting billet with the thickness of 200mm, and controlling the superheat degree of the continuous casting to be less than 50 ℃;
2. putting the continuous casting slab into a stepping heating furnace for heating, controlling the heating temperature to be 1210 ℃, hot rolling the continuous casting slab on a rolling mill to be 20mm, and controlling the finish rolling temperature to be 970 ℃;
3. and carrying out solution treatment on the hot rolled plate, controlling the temperature of the solution treatment to 1170 ℃, and finally carrying out acid pickling to obtain a high-corrosion-resistance austenitic stainless steel hot rolled plate finished product, wherein the product performance is shown in Table 2.
Example 3
The components of the high corrosion resistant austenitic stainless steel according to the present invention are listed in table 1, and the specific preparation method comprises:
1. smelting by adopting the modes of an EAF (electric furnace), an AOD (argon oxygen decarburization furnace) and an LF (ladle refining furnace), and die-casting a 290mm flat ingot;
2. putting the die casting slab ingot into a stepping heating furnace for heating, controlling the heating temperature to be 1230 ℃, hot rolling the die casting slab ingot on a rolling mill to form a hot rolled plate with the thickness of 30mm, and controlling the final rolling temperature to be 990 ℃;
3. and (3) carrying out solution treatment on the hot rolled plate, controlling the temperature of the solution treatment to be 1190 ℃, and finally carrying out acid pickling to obtain a high-corrosion-resistance austenitic stainless steel hot rolled plate finished product, wherein the product performance is shown in table 2.
Example 4
The components of the high corrosion resistant austenitic stainless steel according to the present invention are listed in table 1, and the specific preparation method comprises:
1. in the embodiment, the method comprises the steps of smelting by adopting an EAF (electric furnace), an AOD (argon oxygen decarburization) and an LF (ladle refining furnace), continuously casting a 150mm continuous casting billet, and controlling the superheat degree of the continuous casting to be less than 50 ℃;
2. putting the continuous casting slab into a stepping heating furnace for heating, controlling the heating temperature at 1190 ℃, and carrying out hot rolling on a rolling mill to obtain a 6mm hot rolled coil, wherein the final rolling temperature is controlled at 920 ℃;
3. and (3) carrying out solution treatment on the hot-rolled coil, controlling the temperature of the solution treatment to 1150 ℃, and finally carrying out acid pickling to obtain a finished product of the high-corrosion-resistance austenitic stainless steel hot-rolled coil, wherein the product performance is shown in Table 2.
Example 5
The components of the high corrosion resistant austenitic stainless steel according to the present invention are listed in table 1, and the specific preparation method comprises:
1. in the embodiment, the method comprises the steps of smelting by adopting an EAF (electric furnace), an AOD (argon oxygen decarburization) and an LF (ladle refining furnace), continuously casting a 150mm continuous casting billet, and controlling the superheat degree of the continuous casting to be less than 50 ℃;
2. putting the continuous casting slab into a stepping heating furnace for heating, controlling the heating temperature at 1160 ℃, and carrying out hot rolling on a rolling mill to obtain a hot rolled plate with the thickness of 10mm, wherein the final rolling temperature is controlled at 950 ℃; and carrying out solution treatment on the hot rolled plate, controlling the temperature of the solution treatment at 1160 ℃, and finally carrying out acid pickling to obtain a high-corrosion-resistance austenitic stainless steel hot rolled plate finished product, wherein the product performance is shown in Table 2.
Comparative example 1
Comparative example 1 is a conventional N08367 super austenitic stainless steel, the production process is the same as in the examples, and the formed components and various properties are shown in tables 1 and 2.
As can be seen from the comparison between tables 1 and 2, compared with the N08367 super austenitic stainless steel of the comparative example 1, the high corrosion resistant austenitic stainless steel of the invention has the advantages that the PREN value of the steel grade of the invention is kept to be more than or equal to 45, the excellent corrosion resistance and the room temperature mechanical property are improved by properly increasing the content of chromium and nitrogen and reducing the content of molybdenum, and meanwhile, the thermoplastic property of the material is obviously improved, so that the hot rolling edge crack degree is reduced, and the manufacturability of the material is improved.
From the comparison, the heat-resistant austenitic stainless steel disclosed by the invention has better manufacturability and excellent high-temperature corrosion resistance, and can be applied to preparation of equipment for harsh corrosion environments such as energy chemical industry, waste gas treatment, petroleum refining and the like.
TABLE 2 comparison of the properties of the examples with those of the comparative examples
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 preferred 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 scope of the present invention.
Claims (9)
1. The high-corrosion-resistance austenitic stainless steel is characterized by comprising the following chemical components in percentage by weight: c: less than or equal to 0.020, Si: less than or equal to 0.5, Mn: 2.0 or less, P: 0.025 or less, S: less than or equal to 0.010, Ni: 21.5 to 23.5, Cr: 22.0 to 24.0, Mo: 5.0-6.0, N: 0.25 to 0.35, Cu: 0.5 to 1.5, W: less than or equal to 1.0, the balance of Fe and inevitable impurities, and the PREN value is more than or equal to 45(PREN ═ Cr% +3.3 Mo% + 16N%).
2. The austenitic stainless steel of claim 1, wherein the weight percentage of Cr is 22.5-23.5.
3. The austenitic stainless steel of claim 1, wherein the weight percentage of Mo is 5.2-5.8.
4. The highly corrosion-resistant austenitic stainless steel of claim 1, wherein the weight percentage of N is 0.27 to 0.32.
5. The highly corrosion-resistant austenitic stainless steel of claim 1, wherein the weight percentage of Cu is 0.7 to 1.2; the weight percentage of W is less than or equal to 0.8.
6. The highly corrosion-resistant austenitic stainless steel of claim 1, wherein the weight percentage of P is 0.020 or less; the weight percentage of S is less than or equal to 0.005; the weight percentage wt% of Ni is 22.0-23.0.
7. The method for manufacturing a highly corrosion-resistant austenitic stainless steel according to claim 1, comprising the steps of:
(1) smelting in the modes of an EAF (electric furnace), an AOD (argon oxygen decarburization furnace) and an LF (ladle refining furnace), continuously casting or die casting a flat ingot, and controlling the superheat degree of continuous casting to be less than 50 ℃;
(2) putting a continuous casting slab or a die casting slab ingot into a stepping heating furnace for heating, controlling the heating temperature to 1150-1250 ℃, hot rolling the continuous casting slab or the die casting slab ingot on a rolling mill into a plate or a coil with required specification, controlling different controlled rolling processes according to different plate thicknesses, and controlling the final rolling temperature to 900-1000 ℃;
(3) and (3) carrying out solution treatment on the hot rolled plate and the coil to control the solution treatment temperature to be 1100-1200 ℃, and finally carrying out acid pickling to obtain a finished product of the heat-resistant austenitic stainless steel hot rolled plate and coil.
8. The highly corrosion-resistant austenitic stainless steel of claim 1 or the stainless steel produced by the method of manufacturing the highly corrosion-resistant austenitic stainless steel of claim 7, wherein the highly corrosion-resistant austenitic stainless steel has a pitting corrosion ratio (g/cm2) <0.0001 and a hot rolling edge crack <5 mm.
9. Use of the highly corrosion-resistant austenitic stainless steel of claim 1 for manufacturing equipment for use in severe corrosive environments such as energy chemical, exhaust gas treatment, petroleum refining, etc.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010814407.3A CN114075640A (en) | 2020-08-13 | 2020-08-13 | High-corrosion-resistance austenitic stainless steel and manufacturing method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010814407.3A CN114075640A (en) | 2020-08-13 | 2020-08-13 | High-corrosion-resistance austenitic stainless steel and manufacturing method thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114075640A true CN114075640A (en) | 2022-02-22 |
Family
ID=80281221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010814407.3A Pending CN114075640A (en) | 2020-08-13 | 2020-08-13 | High-corrosion-resistance austenitic stainless steel and manufacturing method thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114075640A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115874103A (en) * | 2022-12-16 | 2023-03-31 | 坤石容器制造有限公司 | High-strength austenitic stainless steel for ultra-pure electronic special gas in semiconductor industry and preparation method thereof |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09104953A (en) * | 1995-10-04 | 1997-04-22 | Japan Steel Works Ltd:The | Austenitic stainless clad steel plate excellent in corrosion resistance and its production |
JP2002096171A (en) * | 2000-09-19 | 2002-04-02 | Nisshin Steel Co Ltd | WELD DUCTILITY IMPROVEMENT METHOD FOR WELDED AUSTENITIC STAINLESS STEEL PIPE CONTAINING Mo, HIGH-Cr AND HIGH-Ni |
CN101684542A (en) * | 2008-09-26 | 2010-03-31 | 宝山钢铁股份有限公司 | Duplex stainless steel with pitting corrosion resistance and favourable cold temperature flexibility and manufacturing method thereof |
CN105543711A (en) * | 2015-12-22 | 2016-05-04 | 东北大学 | Cast-rolling method for restraining Cr element and Mo element of super-austenitic stainless steel from center segregation |
CN106555133A (en) * | 2015-09-24 | 2017-04-05 | 宝山钢铁股份有限公司 | A kind of high-strength corrosion-resistant rustless steel, tubing and casing and its manufacture method |
CN106636858A (en) * | 2016-10-24 | 2017-05-10 | 江苏星火特钢有限公司 | Method for producing high-anticorrosive high-nitrogen super austenitic stainless steel |
CN106893831A (en) * | 2017-03-13 | 2017-06-27 | 东北大学 | A kind of super austenitic stainless steel high temperature homogenization processing method |
CN107876562A (en) * | 2017-11-23 | 2018-04-06 | 海盐中达金属电子材料有限公司 | A kind of super austenitic stainless steel steel band and its processing hot-rolling mill |
CN108004487A (en) * | 2016-10-28 | 2018-05-08 | 宝钢特钢有限公司 | A kind of high nitrogen is without magnetic austenitic stainless steel and its manufacture method |
CN108396223A (en) * | 2018-03-29 | 2018-08-14 | 东北大学 | A kind of super austenitic stainless steel and its alloying component optimum design method |
CN108723712A (en) * | 2018-05-29 | 2018-11-02 | 南京钢铁股份有限公司 | A kind of high anti-corrosion container super austenitic stainless steel composite plate and preparation method |
CN110499455A (en) * | 2018-05-18 | 2019-11-26 | 宝钢特钢有限公司 | A kind of age-hardening austenitic stainless steel and preparation method thereof |
-
2020
- 2020-08-13 CN CN202010814407.3A patent/CN114075640A/en active Pending
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09104953A (en) * | 1995-10-04 | 1997-04-22 | Japan Steel Works Ltd:The | Austenitic stainless clad steel plate excellent in corrosion resistance and its production |
JP2002096171A (en) * | 2000-09-19 | 2002-04-02 | Nisshin Steel Co Ltd | WELD DUCTILITY IMPROVEMENT METHOD FOR WELDED AUSTENITIC STAINLESS STEEL PIPE CONTAINING Mo, HIGH-Cr AND HIGH-Ni |
CN101684542A (en) * | 2008-09-26 | 2010-03-31 | 宝山钢铁股份有限公司 | Duplex stainless steel with pitting corrosion resistance and favourable cold temperature flexibility and manufacturing method thereof |
CN106555133A (en) * | 2015-09-24 | 2017-04-05 | 宝山钢铁股份有限公司 | A kind of high-strength corrosion-resistant rustless steel, tubing and casing and its manufacture method |
CN105543711A (en) * | 2015-12-22 | 2016-05-04 | 东北大学 | Cast-rolling method for restraining Cr element and Mo element of super-austenitic stainless steel from center segregation |
CN106636858A (en) * | 2016-10-24 | 2017-05-10 | 江苏星火特钢有限公司 | Method for producing high-anticorrosive high-nitrogen super austenitic stainless steel |
CN108004487A (en) * | 2016-10-28 | 2018-05-08 | 宝钢特钢有限公司 | A kind of high nitrogen is without magnetic austenitic stainless steel and its manufacture method |
CN106893831A (en) * | 2017-03-13 | 2017-06-27 | 东北大学 | A kind of super austenitic stainless steel high temperature homogenization processing method |
CN107876562A (en) * | 2017-11-23 | 2018-04-06 | 海盐中达金属电子材料有限公司 | A kind of super austenitic stainless steel steel band and its processing hot-rolling mill |
CN108396223A (en) * | 2018-03-29 | 2018-08-14 | 东北大学 | A kind of super austenitic stainless steel and its alloying component optimum design method |
CN110499455A (en) * | 2018-05-18 | 2019-11-26 | 宝钢特钢有限公司 | A kind of age-hardening austenitic stainless steel and preparation method thereof |
CN108723712A (en) * | 2018-05-29 | 2018-11-02 | 南京钢铁股份有限公司 | A kind of high anti-corrosion container super austenitic stainless steel composite plate and preparation method |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115874103A (en) * | 2022-12-16 | 2023-03-31 | 坤石容器制造有限公司 | High-strength austenitic stainless steel for ultra-pure electronic special gas in semiconductor industry and preparation method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20190226068A1 (en) | Process for manufacturing hot-rolled plate, strip or coil made of duplex stainless steel | |
CN103741066B (en) | A kind of precise electronic hard state austenitic stainless steel of no magnetic and its manufacture method | |
CN102337481A (en) | Molybdenum-containing nickel-saving austenitic stainless steel with excellent corrosion resistance and manufacturing method thereof | |
CN111575588A (en) | Martensite precipitation hardening stainless steel and preparation method and application thereof | |
CN102560286A (en) | Non-magnetic hard-section nickel austenitic stainless steel and preparation method thereof | |
CN109972060B (en) | Low-nickel high-strength duplex stainless steel material and preparation method thereof | |
WO2023087833A1 (en) | High-strength steel with good weather resistance and manufacturing method therefor | |
CN112981276A (en) | Heat-resistant austenitic stainless steel and manufacturing method thereof | |
CN101768702B (en) | Medium-chromium ferrite stainless steel for automobile with high formability and acidic corrosion resistance as well as manufacturing method thereof | |
CN101775560A (en) | Nickel-saving austenitic stainless steel and production method thereof | |
CN101845603A (en) | Ferrite stainless steel for high temperature-end part of exhaust system of automobile and manufacturing method thereof | |
CN114990427B (en) | Hot-rolled corrosion-resistant round steel and preparation method thereof | |
CN102409266B (en) | Acid corrosion resistant steel with excellent low-temperature toughness and manufacturing method thereof | |
CN111455150A (en) | Non-oriented electrical steel for non-standard-thickness electric bicycle motor and production method thereof | |
CN113789468A (en) | Wear-resistant corrosion-resistant steel plate for silt conveying pipeline and preparation method thereof | |
CN114075640A (en) | High-corrosion-resistance austenitic stainless steel and manufacturing method thereof | |
CN109182673B (en) | Low-cost high-strength wear-resistant stainless steel and production method thereof | |
CN109913758B (en) | Ferritic stainless steel plate with good high-temperature strength and forming performance and preparation method thereof | |
US20220267875A1 (en) | Austenitic stainless steel having improved strength, and method for manufacturing same | |
CN113957361B (en) | Austenitic heat-resistant steel plate for petrochemical equipment and manufacturing method thereof | |
CN115044826A (en) | 410 ferritic stainless steel | |
CN113862570A (en) | High-strength sulfuric acid dew point corrosion resistant steel and production method thereof | |
CN115341147B (en) | Medium chromium ferrite stainless steel for elevator panel and preparation method thereof | |
JP2906965B2 (en) | Hot rolled steel sheet excellent in corrosion resistance and method for producing the same | |
CN117385288A (en) | High-strength non-oriented electrical steel with excellent medium-frequency magnetic performance and manufacturing method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220222 |