CN112981276A - Heat-resistant austenitic stainless steel and manufacturing method thereof - Google Patents
Heat-resistant austenitic stainless steel and manufacturing method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- 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
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- 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
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- 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
- C21D2211/001—Austenite
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to heat-resistant austenitic stainless steel, which comprises the following chemical components in percentage by weight (wt%): c: 0.02 to 0.12%, Si: 1.5-3.5%, Mn: 0.5-2.0%, P: less than or equal to 0.035%, S: less than or equal to 0.015 percent, Ni: 13.0-18.0%, Cr: 23.0-28.0%, Mo: 0.10 to 1.50%, N: 0.25-0.40%, Al: 0.02-0.15%, and the balance of Fe and inevitable impurities. The invention has excellent high-temperature mechanical property, oxidation resistance and corrosion resistance, and can be applied to processing and manufacturing heat-resistant parts with higher high-temperature resistance requirements.
Description
Technical Field
The invention belongs to the field of stainless steel materials, relates to heat-resistant austenitic stainless steel, and particularly relates to a heat-resistant austenitic stainless steel hot rolled plate with excellent high-temperature mechanical property, oxidation resistance and corrosion resistance and a manufacturing method thereof.
Background
At present, 300 series of austenitic stainless steel widely used at home and abroad is taken as the main part, and the steel grades have good plasticity and corrosion resistance, but the steel grades have lower high-temperature strength and poorer oxidation resistance, and can not be applied to high-temperature resistant environment. The heat-resistant austenitic stainless steel 310S has high chromium content and nickel content, good oxidation resistance, corrosion resistance and high-temperature creep strength, can continuously operate at high temperature, has good high-temperature resistance, can be used at the high temperature of 1100 ℃ in certain applications, and still has the defects of low high-temperature strength and short service life. With the requirements of modern industry on further improving production efficiency, reducing energy consumption and protecting environment, the use working conditions of modern industrial equipment are more and more strict, the high temperature resistance indexes of some key equipment are further improved, the higher requirements are provided for materials, and the development of austenitic stainless steel with more excellent high temperature resistance is required.
Patent ZL200910220419.7 discloses an oxidation-resistant heat-resistant austenitic stainless steel, which is characterized in that (mass percent): 0.2 to 0.4% of C, 0 to 1.5% of Si, 1.5 to 2.0% of Mn, 11.0 to 14.0% of Ni, 24.0 to 28.0% of Cr, 0.8 to 1.2% of Nb, 0.04% of P, 0.04% of S, and the balance of Fe and inevitable impurities. The austenitic stainless steel improves the high-temperature strength and the high-temperature oxidation resistance by adjusting alloying components, and a heat-resistant steel mould shell is prepared by a precision casting process, wherein the service temperature of the steel can reach 1050 ℃. The steel grade improves the high-temperature strength by increasing the content of carbon and niobium, but the high content of carbon causes difficult hot working and has low oxidation resistance and corrosion resistance.
Patent ZL201610354857.2 relates to an austenitic stainless steel for a high-temperature resistant furnace pipe. The stainless steel comprises the following chemical components (in percentage by weight): cr: 24-26%, Ni: 19-21%, Si: 0.3-0.8%, C: 0.02 to 0.06%, Mn: 1.0-1.5%, W: 1.5-2.5%, N is less than or equal to 0.2%, P is less than or equal to 0.04%, and S is less than or equal to 0.03%; the balance being Fe. The invention improves the high temperature creep resistance and oxidation resistance better than that of 310S heat-resistant stainless steel by improving the content of chromium and nickel, reasonably adding the content of tungsten and strictly controlling the content of other alloy elements, and can be used for a longer time at the temperature of more than 1000 ℃. The high-temperature strength and the high-temperature creep property of the steel grade are improved by adding the tungsten content, but the high-temperature strength is still low and the cost is higher.
Table 1 related patents and prior product ingredient comparison (wt.%)
The related patents of the heat-resistant austenitic stainless steel searched above relate to performances such as oxidation resistance, high-temperature strength, high-temperature creep and the like, but the high-temperature resistance is still low, and excellent matching of the high-temperature strength, the oxidation resistance and the corrosion resistance is difficult to achieve.
Disclosure of Invention
The invention aims to provide a heat-resistant austenitic stainless steel alloy component and a manufacturing method thereof, so that the material has excellent high-temperature mechanical property, oxidation resistance and corrosion resistance.
A heat-resistant austenitic stainless steel material comprises the following elements in percentage by weight: 0.02-0.12% of carbon, 1.6-3.4% of silicon, 0.5-2.0% of manganese, 13.0-18.0% of nickel, 23.0-28.0% of chromium, 0.10-1.50% of molybdenum, 0.25-0.40% of nitrogen, 0.02-0.15% of aluminum, less than or equal to 0.035% of phosphorus, less than or equal to 0.015% of sulfur and the balance of iron and inevitable impurities.
Preferably, the heat-resistant austenitic stainless steel material comprises the following elements in percentage by weight: 0.03-0.11% of carbon, 1.5-3.5% of silicon, 0.6-1.9% of manganese, 13.2-17.9% of nickel, 23.1-27.9% of chromium, 0.20-1.40% of molybdenum, 0.26-0.39% of nitrogen, 0.03-0.14% of aluminum, less than or equal to 0.023% of phosphorus, less than or equal to 0.001% of sulfur, and the balance of iron and inevitable impurities.
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 due to the too low carbon content, so that the carbon content is preferably 0.02-0.12%.
Silicon: the silicon-containing deoxidizer is a ferrite forming element, can be effectively used as a deoxidizer and is also used for improving the oxidation resistance, when the content is low, the mechanical property of steel is not greatly influenced, but excessive addition of silicon accelerates precipitation of intermetallic phases, so that the processing and toughness are deteriorated, and the addition of silicon is controlled to be 1.5-3.5%.
Manganese: the manganese-containing rare earth ferrite is a weak austenite element, plays a role in stabilizing austenite, is favorable for ensuring non-magnetism, can obviously improve the solubility of nitrogen by adding manganese, and is favorable for improving the work hardening capacity of materials. Too high manganese is detrimental to oxidation resistance and corrosion resistance, so the manganese content should be controlled to 0.5-2.0%.
Phosphorus: is an impurity element in the steel, 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, therefore, the phosphorus is controlled to be less than or equal to 0.035 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 0.015 percent.
Chromium: the important element for improving the corrosion resistance can improve the corrosion resistance of the stainless steel in oxidizing acid, improve the local corrosion capabilities of the stainless steel in chloride solution such as stress corrosion resistance, pitting corrosion resistance, crevice corrosion resistance and the like, and simultaneously, the chromium is also an important element for improving the oxidation resistance. If the amount is too low, the corrosion resistance and oxidation resistance are poor, and the solubility of nitrogen is not favorable, but if the amount is too high, the tendency of precipitation of ferrite and intermetallic compounds increases, and therefore, 23.0 to 28.0% is preferable.
Nickel: as an element for strongly forming and expanding an austenite region, the stability of an austenite structure can be improved, the non-magnetism is favorably ensured, the hot workability is favorably improved, and meanwhile, the nickel in the high-chromium heat-resistant steel is favorably improved in the oxidation resistance, but the price of the nickel is higher, so that the content of the nickel is preferably controlled to be 13.0-18.0%.
Molybdenum: the ferrite forming element can improve the high-temperature strength and the corrosion resistance of the alloy, particularly under the condition of the complex action with chromium, the pitting corrosion resistant equivalent is 3.3 times of that of the chromium, and the addition is not suitable in consideration of the price factor, so the ferrite forming element is preferably controlled to be 0.10-1.50 percent.
Aluminum: the alloy can effectively deoxidize, is beneficial to improving the oxidation resistance, and is difficult to smelt and pour and influences the toughness and the hot workability, so that the addition of aluminum is controlled to be 0.02-0.15%.
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 0.25-0.40%.
A preparation method of the heat-resistant austenitic stainless steel material comprises the following steps:
smelting a continuous casting billet or a die casting slab ingot;
putting the continuous casting slab or the die casting slab ingot into a stepping heating furnace, heating at 1200-1300 ℃, transferring to a rolling mill, and hot rolling to form a plate, wherein the final rolling temperature is controlled to be 900-1050 ℃;
and carrying out solid solution treatment on the plate at 1000-1150 ℃, and then carrying out acid pickling to obtain the heat-resistant austenitic stainless steel material.
As a preferable scheme, the smelting method comprises the following steps:
melting the raw materials into molten steel in an electric furnace, pouring the molten steel into an AOD furnace, carrying out blowing for removing C, O and S, controlling N and adjusting chemical components in the AOD furnace, and pouring the molten steel into an LF furnace for final chemical component adjustment after the smelting components basically meet the requirements;
and continuously casting or die casting the adjusted molten steel into a flat ingot, controlling the continuous casting superheat degree to be less than 50 ℃, and controlling the continuous casting drawing speed to be 0.5-1.5 m/min.
The qualified molten steel with good purity is obtained by the method of electric furnace and external refining, the production cost is lower, and the efficiency is high.
Preferably, the raw materials comprise ferrochrome, ferronickel and scrap steel.
Preferably, the acid cleaning is performed using a mixed acid of nitric acid and hydrofluoric acid.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following characteristics and positive effects:
carbon and nitrogen are strong austenite forming elements and are beneficial to improving the strength of the material, in order to improve the high-temperature strength of the heat-resistant austenitic stainless steel hot rolled plate, properly improve the content of carbon and nitrogen, and consider the adverse effects and the smelting control difficulty of the carbon and nitrogen, the carbon and the nitrogen are controlled within a reasonable range of 0.02-0.12% and 0.25-0.40%, respectively, and the carbon and the nitrogen within a certain range do not obviously reduce the plasticity of the material on the premise of improving the strength of the austenitic stainless steel, so that the steel grade still keeps higher plastic toughness. Considering the requirement of nitrogen dissolving capacity in steel and the high-temperature oxidation resistance, the content of chromium is controlled to be 23.0-28.0%, the content of manganese is controlled to be 0.5-2.0%, and in order to further improve the high-temperature oxidation resistance, the content of silicon and the content of aluminum are respectively controlled to be 1.5-3.5% and 0.02-0.15%. In addition, the proper nickel content is controlled to be 13.0-18.0%, so that the ratio of chromium equivalent to nickel equivalent is in a proper range, the steel has good plasticity, hot workability and oxidation resistance, and the cost is lower compared with that of 310S.
In addition, the heat-resistant austenitic stainless steel contains 23.0-28.0% of high chromium, 0.25-0.40% of high nitrogen and 0.10-1.50% of molybdenum, and has a high PREN value (PREN ═ Cr% +3.3 × Mo% +16 × N%), so the heat-resistant austenitic stainless steel has good corrosion resistance.
The heat-resistant austenitic stainless steel can be produced in batches by using an alloy plate strip production line, and the specific preparation method comprises smelting in the modes 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 continuous casting is controlled to have the superheat degree of 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 be 1200-1300 ℃, hot-rolling the continuous casting slab or the die casting slab ingot on a rolling mill into a plate with required specification, controlling different controlled rolling processes according to different plate thicknesses, controlling the final rolling temperature to be 900-1050 ℃, and ensuring that good as-cast structure thermoplasticity and well-controlled hot rolled plate profile are kept in the temperature range; and (3) carrying out solution treatment on the hot rolled plate, controlling the temperature of the solution treatment to be 1000-1150 ℃, obtaining a good recrystallization structure of the hot rolled plate in the temperature range, reasonably matching strength and toughness indexes, and finally carrying out acid pickling to obtain a finished product of the heat-resistant austenitic stainless steel hot rolled plate. Due to reasonable chemical component design and proper controlled rolling process, the produced heat-resistant austenitic stainless steel plate product has excellent high-temperature mechanical property, oxidation resistance and corrosion resistance, and can be applied to processing and manufacturing heat-resistant parts with higher high-temperature resistance requirements.
In summary, the heat-resistant austenitic stainless steel provided by the invention is designed according to chemical components and controlled in the manufacturing process, so that a hot-rolled plate with excellent high-temperature mechanical property, oxidation resistance and corrosion resistance is obtained, and the heat-resistant austenitic stainless steel can be applied to processing and manufacturing heat-resistant components with high requirements on high-temperature resistance.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Examples 1 to 5
The heat-resistant austenitic stainless steel compositions of examples 1 to 5 of the present invention are listed in table 2, and the manufacturing method comprises the steps of:
adopting the modes of EAF (electric furnace) + AOD (argon oxygen decarburization furnace) + LF (ladle refining furnace) for smelting, and continuously casting or die casting flat ingots, which specifically comprises the following steps: adding ferrochrome, ferronickel, scrap steel and the like into an electric furnace for melting, then pouring molten steel into an AOD furnace, performing blowing for removing C, O, S and N and adjusting chemical components in the AOD furnace, and when the smelting components basically meet the requirements, pouring the molten steel into an LF furnace for final chemical component and molten steel temperature adjustment; the qualified molten steel with good purity is obtained by the method of electric furnace and external refining, the production cost is lower, and the efficiency is high. Continuously casting or die-casting a flat ingot on a vertical continuous casting machine, wherein the superheat degree of continuous casting is controlled to be less than 50 ℃, and the continuous casting drawing speed is controlled to be 0.5-1.5 m/min;
and (2) heating the continuous casting slab or the die casting slab ingot in a stepping heating furnace, controlling the heating temperature to be 1200-1300 ℃, hot-rolling the continuous casting slab or the die casting slab ingot on a rolling mill into a plate with required specification, controlling different controlled rolling processes according to different plate thicknesses, controlling the final rolling temperature to be 900-1050 ℃, controlling the solid solution treatment temperature to be 1000-1150 ℃, and finally pickling to obtain a heat-resistant austenitic stainless steel hot-rolled plate finished product, wherein the product performance is shown in table 3.
Comparative example 1
Comparative example 1 is a conventional 310S heat-resistant austenitic stainless steel, the production process is the same as in example, and its chemical composition and properties are shown in tables 2 and 3.
Table 2 ingredients of examples 1 to 5 and comparative example 1, balance iron (wt.%)
As can be seen from the comparison of tables 2 and 3, compared with the 310S heat-resistant stainless steel of comparative example 1, the heat-resistant austenitic stainless steel of the present invention has greatly improved mechanical properties at both room temperature and high temperature of 900 ℃, and thus has excellent high-temperature mechanical properties; the PREN value of the heat-resistant austenitic stainless steel is also obviously improved compared with that of 310S, so that the heat-resistant austenitic stainless steel has excellent corrosion resistance; in addition, the heat-resistant austenitic stainless steel contains higher oxidation resistance elements of chromium, silicon and aluminum than 310S, so that the heat-resistant austenitic stainless steel has more excellent oxidation resistance.
From the comparison, the heat-resistant austenitic stainless steel disclosed by the invention has excellent high-temperature mechanical property, oxidation resistance and corrosion resistance, and can be applied to processing and manufacturing heat-resistant parts with higher high-temperature resistance requirements.
TABLE 3 comparison of the Performance of examples 1-5 with that of comparative example 1
In summary, the present invention is only a preferred embodiment, and not intended to limit the scope of the invention, and all equivalent changes and modifications in the shape, structure, characteristics and spirit of the present invention described in the claims should be included in the scope of the present invention.
Claims (6)
1. A heat-resistant austenitic stainless steel material is characterized by comprising the following elements in percentage by weight: 0.02-0.12% of carbon, 1.6-3.4% of silicon, 0.5-2.0% of manganese, 13.0-18.0% of nickel, 23.0-28.0% of chromium, 0.10-1.50% of molybdenum, 0.25-0.40% of nitrogen, 0.02-0.15% of aluminum, less than or equal to 0.035% of phosphorus, less than or equal to 0.015% of sulfur and the balance of iron and inevitable impurities.
2. A heat resistant austenitic stainless steel material according to claim 1, characterized by comprising the following elements in weight percent: 0.03-0.11% of carbon, 1.5-3.5% of silicon, 0.6-1.9% of manganese, 13.2-17.9% of nickel, 23.1-27.9% of chromium, 0.20-1.40% of molybdenum, 0.26-0.39% of nitrogen, 0.03-0.14% of aluminum, less than or equal to 0.023% of phosphorus, less than or equal to 0.001% of sulfur, and the balance of iron and inevitable impurities.
3. A method of manufacturing a heat resistant austenitic stainless steel material according to claim 1 or 2, characterized by comprising the steps of:
smelting a continuous casting billet or a die casting slab ingot;
putting the continuous casting slab or the die casting slab ingot into a stepping heating furnace, heating at 1200-1300 ℃, transferring to a rolling mill, and hot rolling to form a plate, wherein the final rolling temperature is controlled to be 900-1050 ℃;
and carrying out solid solution treatment on the plate at 1000-1150 ℃, and then carrying out acid pickling to obtain the heat-resistant austenitic stainless steel material.
4. The method for preparing a heat-resistant austenitic stainless steel material according to claim 3, wherein the method for smelting comprises the steps of:
melting raw materials into molten steel in an electric furnace, pouring the molten steel into an AOD furnace, blowing for removing C, O and S, controlling N and adjusting chemical components in the AOD furnace, pouring the molten steel into an LF furnace after the smelting components basically meet the requirements, and adjusting the final chemical components and the temperature of the molten steel;
and continuously casting or die casting the adjusted molten steel into a flat ingot, controlling the continuous casting superheat degree to be less than 50 ℃, and controlling the continuous casting drawing speed to be 0.5-1.5 m/min.
5. The method for producing a heat-resistant austenitic stainless steel material according to claim 4, wherein the raw materials include ferrochrome, ferronickel, and scrap steel.
6. The method for producing a heat-resistant austenitic stainless steel material according to claim 3, wherein the acid washing uses a mixed acid of nitric acid and hydrofluoric acid.
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| CN113584401A (en) * | 2021-08-03 | 2021-11-02 | 山东盛阳金属科技股份有限公司 | 310S heat-resistant steel hot continuous rolling plate coil and processing technology thereof |
| CN113913707A (en) * | 2021-09-27 | 2022-01-11 | 鹰普（中国）有限公司 | Method for improving performance of austenitic heat-resistant stainless steel material |
| CN114318137A (en) * | 2021-06-29 | 2022-04-12 | 鞍钢股份有限公司 | Austenitic stainless steel plate for nuclear power and manufacturing method thereof |
| CN114645218A (en) * | 2022-04-01 | 2022-06-21 | 成都成林数控刀具股份有限公司 | high-C high-Ni austenitic age-hardening heat-resistant steel and preparation method thereof |
| CN115807191A (en) * | 2022-12-01 | 2023-03-17 | 振石集团华智研究院(浙江)有限公司 | Stainless steel material and preparation method thereof |
| CN115852238A (en) * | 2021-09-24 | 2023-03-28 | 宝武特种冶金有限公司 | Low-cost manufacturing method of super austenitic stainless steel bar |
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