CN117604399A - Manufacturing method of 410 ferrite stainless steel - Google Patents
Manufacturing method of 410 ferrite stainless steel Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 57
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 45
- 239000010935 stainless steel Substances 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 238000003723 Smelting Methods 0.000 claims abstract description 13
- 238000007670 refining Methods 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 7
- 238000000137 annealing Methods 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 229910001710 laterite Inorganic materials 0.000 claims abstract description 5
- 239000011504 laterite Substances 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims abstract description 3
- 238000005245 sintering Methods 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 20
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 3
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000011573 trace mineral Substances 0.000 claims description 3
- 235000013619 trace mineral Nutrition 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- 241000242583 Scyphozoa Species 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 230000009466 transformation Effects 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- 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
- C22C38/001—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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a manufacturing method of 410 ferrite stainless steel, which comprises the following components in percentage by weight: 0.03 to 0.07 weight percent, less than or equal to 0.60 weight percent of Si, less than or equal to 0.55 weight percent of Mn, less than or equal to 0.040 weight percent of P, less than or equal to 0.005 weight percent of S, less than or equal to 0.050 weight percent of N, and Cu: less than or equal to 0.03 weight percent, cr:11.50-13.50wt%, ni:0.40-0.60wt%; the ferrite stainless steel comprises the following technological routes: laterite nickel ore, sintering, primary smelting furnace smelting, AOD refining, LF refining, slab continuous casting, hot continuous rolling, annealing, inspecting, packaging and warehousing. The steel contains 0.4-0.6% of nickel, has higher yield strength, and can be used for general structural parts.
Description
The invention is a divisional application, the application number of the mother application: 2022104948474, name: 410 ferritic stainless steel, filing date: 2022, 05, 07.
Technical Field
The invention relates to the technical field of stainless steel production, in particular to a manufacturing method of 410 ferrite stainless steel.
Background
The ferrite stainless steel is mainly ferrite stainless steel in a use state, has the chromium content of 11-30 percent and has a body-centered cubic crystal structure. The steel has the characteristics of high heat conductivity, small expansion coefficient, good oxidation resistance, excellent stress corrosion resistance and the like. The ferrite stainless steel has excellent local corrosion resistance such as chloride stress corrosion resistance, pitting corrosion resistance and crevice corrosion resistance besides stainless property and local corrosion resistance. Is a resource-saving and environment-friendly stainless steel, and is widely applied to the fields of automobiles, railway transportation, household appliances, building interior decoration and the like.
Most stainless steel enterprises generally adopt an electric arc furnace-AOD (VOD) or primary smelting furnace-molten iron pretreatment (converter) -AOD (VOD) two-step method to smelt the ferrite stainless steel, the ferrite stainless steel smelted by the process generally does not contain Ni, the Ni content in the steel is almost zero, the hardness and the yield strength of the stainless steel are lower, and the material is more suitable for stamping part processing, but not suitable for processing structural parts.
In summary, the following problems exist in the prior art: nickel-free ferritic stainless steel smelted by an electric arc furnace or primary smelting furnace-molten iron pretreatment (converter) process route has lower hardness and yield strength.
Disclosure of Invention
The invention provides 410 ferrite stainless steel and a manufacturing method thereof, which aim to solve the problem that nickel-free ferrite stainless steel is low in hardness and yield strength.
The invention also provides 410 ferrite stainless steel, wherein the 410 ferrite stainless steel comprises the following components in percentage by weight: 0.03 to 0.07 weight percent, less than or equal to 0.60 weight percent of Si, less than or equal to 0.55 weight percent of Mn, less than or equal to 0.040 weight percent of P, less than or equal to 0.005 weight percent of S, less than or equal to 0.050 weight percent of N, and Cu: less than or equal to 0.03 weight percent, cr:11.50-13.50wt%, ni:0.40-0.60wt%.
Further: the thickness of the finished product is 1.8-4mm.
Further: the thickness of the finished product is 2.6mm, 3.0mm and 3.2mm.
Further: the 410 ferrite stainless steel comprises the following chemical components in percentage by weight: 0.062wt%, si:0.56wt%, mn:0.42wt%, P:0.033wt%, S:0.005wt%, N:0.044wt%, cu:0.03wt%, cr:12.37wt%, ni:0.56wt%.
Further: the 410 ferrite stainless steel comprises the following chemical components in percentage by weight: 0.047wt%, si:0.49wt%, mn:0.35wt%, P:0.033wt%, S:0.006wt%, N:0.023wt%, cu:0.03wt%, cr:12.34wt%, ni:0.50wt%.
The 410 ferrite stainless steel is manufactured by adopting a 410 ferrite stainless steel manufacturing method.
The invention also provides a manufacturing method of the 410 ferrite stainless steel, which comprises the following steps:
the 410 ferrite stainless steel comprises the following chemical components in percentage by weight: 0.03 to 0.07 weight percent, less than or equal to 0.60 weight percent of Si, less than or equal to 0.55 weight percent of Mn, less than or equal to 0.040 weight percent of P, less than or equal to 0.005 weight percent of S, less than or equal to 0.050 weight percent of N, and Cu: less than or equal to 0.03 weight percent, cr:11.50-13.50wt%, ni:0.40-0.60wt%; the balance of Fe and unavoidable trace elements;
the manufacturing method of the ferrite stainless steel comprises the following process routes: laterite nickel ore, sintering, smelting in a primary smelting furnace, AOD refining, LF refining, slab continuous casting, hot continuous rolling, annealing, inspecting, packaging and warehousing;
in the AOD refining: adding scrap steel and high-carbon ferrochrome into the molten iron in batches according to weight percentage after the molten iron is added into an AOD furnace, adding ferrosilicon, heating to melt alloy furnace charge, and adjusting O2 in stages after the steel melting is finished: ar proportion blowing, reducing the carbon content to the component setting range, and controlling the tapping temperature to 1580-1610 ℃.
Further, LF refining: slag formation and argon blowing are carried out on the molten steel in an LF furnace, and the argon blowing time is 8-12min.
Further, slab continuous casting, namely pouring temperature is 1530-1550 ℃ by adopting a tundish, alkaline covering agent is adopted by the tundish, the superheat degree of molten steel is controlled at 25-30 ℃, and cooling water is cooled by a crystallizerNarrow surface flow 15-16m 3 /h; broad surface flow 90-100m 3 And/h, the casting blank pulling speed is 0.70-0.90 m/min, and the straightening temperature is more than or equal to 980 ℃.
Further, the method comprises the steps of,
hot continuous rolling: the heating temperature of the casting blank is controlled to be 1130-1170 ℃, the soaking temperature is controlled to be 1140-1160 ℃, the time of the casting blank in a furnace is ensured to be more than or equal to 185min, the overlong heating time is avoided, and the quantity of high-temperature ferrite phase is increased; four-frame rough rolling and nine-frame finish rolling hot continuous rolling are adopted, the final rolling temperature is controlled between 940 and 1000 ℃, and the coiling temperature is controlled between 680 and 720 ℃.
And (5) further annealing: the hot rolled coil is kept warm for a long time and slowly cooled at the temperature of 720-740 ℃ for 20-24 hours.
The invention takes laterite-nickel ore as raw material, adopts proper component proportion and manufacturing process, smelts and rolls ferrite stainless steel 410, has proper hardness, yield strength and tensile strength, and solves the problem that the ferrite stainless steel can be produced only by obtaining nickel-free molten iron in an electric arc furnace or primary smelting furnace-converter process. The steel contains 0.4-0.6% of nickel, and has high yield strength and can be used for general structural parts. The yield strength ReL of the ferrite stainless steel obtained by the invention is more than or equal to 300MPa, the tensile strength Rm is more than or equal to 500MPa, the elongation A is more than or equal to 20 percent, the Rockwell hardness HRB is less than or equal to 89, and the metallographic structure is as follows: ferrite, a very small amount of martensite and carbide which are uniformly dispersed, wherein the ferrite content is more than or equal to 95%, and can reach 95%,96%,97%,98%,99%, and the grain size grade is 9.0-10.0. Furthermore, by adopting proper components and processes, the yield strength ReL of the ferrite stainless steel obtained by the invention: 340-390MPa, tensile strength Rm:510-560MPa, elongation A:25% -38%, rockwell hardness HRB:65-78.
Drawings
FIG. 1 is a photograph showing a metallographic structure of example 1 of the present invention;
FIG. 2 is a photograph showing a metallographic structure of example 2 of the present invention;
FIG. 3 is a photograph showing a metallographic structure of example 3 of the present invention.
Detailed Description
The present invention will now be described for a clearer understanding of technical features, objects, and effects of the present invention.
The applicant found that: the low-nickel iron jellyfish solution obtained by smelting laterite nickel ore as a raw material in a primary smelting furnace is used for smelting ferrite stainless steel, and the steel contains residual Ni element. In the stainless steel, ni is an element for forming an enlarged austenite region, and the existence of Ni enables a (gamma+alpha)/alpha phase boundary in a Fe-Cr binary phase diagram to move towards a higher Cr content direction, so that a single-phase temperature interval of the ferritic stainless steel at a high temperature is changed, the performance of the ferritic stainless steel is changed, and a proper amount of Ni element can not only improve the strength of the stainless steel, but also keep good plasticity and toughness, so that the material is more suitable for structural member processing. Therefore, ferritic stainless steel produced using an electric arc furnace-AOD (VOD) or primary furnace-molten iron pretreatment (converter) -AOD (VOD) process route is low in hardness and yield strength; the ferrite stainless steel produced based on the low nickel molten iron smelting process route of the laterite nickel ore has better strength and toughness. To this end, the applicant proposes a method for manufacturing 410 ferritic stainless steel:
1) The technical scheme is as follows: the ferritic stainless steel comprises the following chemical components in percentage by weight: 0.03 to 0.07 weight percent, less than or equal to 0.60 weight percent of Si, less than or equal to 0.55 weight percent of Mn, less than or equal to 0.040 weight percent of P, less than or equal to 0.005 weight percent of S, less than or equal to 0.050 weight percent of N, and Cu: less than or equal to 0.03 weight percent, cr:11.50-13.50wt%, ni:0.40-0.60wt%; the balance of Fe and unavoidable trace elements.
2) In the AOD refining: adding molten iron into an AOD furnace, adding scrap steel and high-carbon ferrochrome in batches according to weight percentage, adding ferrosilicon, heating to melt alloy furnace charge, and adjusting O in stages after the steel melting is finished 2 : ar proportion blowing, reducing the carbon content to a component setting range, and controlling the tapping temperature to 1580-1610 ℃;
3) Slag formation and argon blowing are carried out on the molten steel in an LF furnace, and the argon blowing time is 8-12min;
4) The high-precision continuous casting control process comprises the following steps: adopting a continuous casting process of weak cooling (the secondary cooling specific water quantity is 0.59L/Kg) +low superheat degree (the superheat degree is 25-30 ℃), constant pull speed (0.80 m/min) +high straightening temperature (the straightening temperature is more than or equal to 980 ℃), and reducing the generation of cracks of molten steel shrinkage casting blanks due to delta-gamma phase transformation;
5) In the hot continuous rolling, the following steps are adopted: the heating temperature of the casting blank is controlled to be 1130-1170 ℃, the soaking temperature is controlled to be 1140-1160 ℃, the time of the casting blank in a furnace is ensured to be more than or equal to 185min, the overlong heating time is avoided, and the quantity of high-temperature ferrite phase is increased; to reduce the problem of edge cracking; four-frame rough rolling and nine-frame finish rolling hot continuous rolling are adopted, the final rolling temperature is controlled between 940 and 1000 ℃, and the coiling temperature is controlled between 680 and 720 ℃.
6) In the annealing: the hot rolled coil is kept warm for a long time and slowly cooled at the temperature of 720-740 ℃ for 20-24 hours.
The production method of the ferrite stainless steel adopts the following components and specific processes. Wherein, table 1 is the composition (in weight percent) of each of the example and comparative example steels. Table 2 shows rolling process parameters corresponding to the component steels of each example and comparative example in table 1, and the present invention is a process before cold rolling, and the above process parameters do not include cold rolling. Table 3 shows the mechanical properties after hot rolling annealing corresponding to the component steels of each example and comparative example in Table 1. The yield strength ReL of the ferrite stainless steel obtained by the invention: 340-390MPa, tensile strength Rm:510-560MPa, elongation A:25% -38%, rockwell hardness HRB:65-78. FIG. 1 is a metallographic structure of example 1, which is: ferrite, a very small amount of martensite and carbide which are uniformly dispersed, wherein the ferrite content is more than or equal to 99%, the grain size is grade 9.5, and fig. 2 is a metallographic structure of example 2, and the metallographic structure is as follows: ferrite, a very small amount of martensite and carbide which are uniformly dispersed, wherein the ferrite content is more than or equal to 99%, the grain size is 9.0 grade, and fig. 3 is a metallographic structure of example 3, and the metallographic structure is as follows: ferrite, a very small amount of martensite and carbide which are uniformly dispersed, wherein the ferrite content is more than or equal to 99 percent, and the grain size is 9.0 grade.
Table 1: chemical composition (wt%)
| Examples | C | Si | Mn | P | S | Ni | Cr | Cu | N |
| Example 1 | 0.062 | 0.56 | 0.42 | 0.033 | 0.005 | 0.56 | 12.37 | 0.03 | 0.044 |
| Example 2 | 0.055 | 0.39 | 0.31 | 0.033 | 0.005 | 0.54 | 12.10 | 0.03 | 0.032 |
| Example 3 | 0.047 | 0.49 | 0.35 | 0.033 | 0.006 | 0.50 | 12.34 | 0.03 | 0.023 |
| Comparative example | 0.057 | 0.48 | 0.23 | 0.018 | 0.001 | 0.078 | 12.16 | 0 | 0.001 |
Table 2: specific process parameters of the examples
Table 3: mechanical Properties of ferritic stainless Steel obtained in examples
| Examples | R p0.2 /MPa | R m /MPa | A/％ | Rockwell hardness HRB |
| Example 1 | 345 | 518 | 36.0 | 70.0 |
| Example 2 | 347 | 554 | 25.6 | 74.0 |
| Example 3 | 374 | 552 | 29.2 | 74.0 |
| Comparative example | 289 | 508 | 28.3 | 65.0 |
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. In order that the components of the invention may be combined without conflict, any person skilled in the art shall make equivalent changes and modifications without departing from the spirit and principles of the invention.
Claims (9)
1. A method for manufacturing 410 ferritic stainless steel, the method comprising:
the 410 ferrite stainless steel comprises the following chemical components in percentage by weight: 0.03 to 0.07 weight percent, less than or equal to 0.60 weight percent of Si, less than or equal to 0.55 weight percent of Mn, less than or equal to 0.040 weight percent of P, less than or equal to 0.005 weight percent of S, less than or equal to 0.050 weight percent of N, and Cu: less than or equal to 0.03 weight percent, cr:11.50-13.50wt%, ni:0.40-0.60wt%; the balance of Fe and unavoidable trace elements;
the manufacturing method of the ferrite stainless steel comprises the following process routes: laterite nickel ore, sintering, primary smelting furnace smelting, AOD refining, LF refining, slab continuous casting, hot continuous rolling, annealing, inspecting, packaging and warehousing.
In the AOD refining: adding molten iron into an AOD furnace, adding scrap steel and high-carbon ferrochrome in batches according to weight percentage, adding ferrosilicon, heating to melt alloy furnace charge, adjusting the proportion of O2 and Ar for converting in stages after steel melting is finished, reducing the carbon content to a component setting range, and controlling the tapping temperature to 1580-1610 ℃;
continuous slab casting, namely pouring temperature of 1530-1550 ℃ by adopting a tundish, controlling superheat degree of molten steel by adopting an alkaline covering agent and controlling narrow surface flow of cooling water of a crystallizer by 15-16m 3 /h; broad surface flow 90-100m 3 And/h, the casting blank pulling speed is 0.70-0.90 m/min, and the straightening temperature is more than or equal to 980 ℃;
the thickness of the finished product is 1.8-4mm;
the yield strength ReL of the obtained ferrite stainless steel is more than or equal to 300MPa, the tensile strength Rm is more than or equal to 500MPa, the elongation A is more than or equal to 20 percent, and the Rockwell hardness HRB is less than or equal to 89.
2. The method of manufacturing 410 ferritic stainless steel according to claim 1, wherein: the 410 ferrite stainless steel comprises the following chemical components in percentage by weight: 0.055wt%, si 0.39wt%, mn:0.31wt%, P0.033 wt%, S:0.005wt%, N:0.032wt%, cu:0.03wt%, cr:12.10wt%, ni:0.54wt%.
3. The method of manufacturing 410 ferritic stainless steel according to claim 1, wherein: the thickness of the finished product is 2.6mm.
4. The method of manufacturing 410 ferritic stainless steel according to claim 1, wherein: hot continuous rolling: the heating temperature of the casting blank is controlled to be 1130-1170 ℃, the soaking temperature is controlled to be 1140-1160 ℃, the time of the casting blank in a furnace is ensured to be more than or equal to 185min, the overlong heating time is avoided, and the quantity of high-temperature ferrite phase is increased; four-frame rough rolling and nine-frame finish rolling hot continuous rolling are adopted, the final rolling temperature is controlled between 940 and 1000 ℃, and the coiling temperature is controlled between 680 and 720 ℃.
5. The method of manufacturing 410 ferritic stainless steel according to claim 1, wherein: the hot rolled coil is kept warm for a long time and slowly cooled at the temperature of 720-740 ℃ for 20-24 hours.
6. The method of manufacturing 410 ferritic stainless steel according to claim 1, wherein: the yield strength ReL of the obtained ferritic stainless steel: 347MPa, tensile Strength Rm:554MPa, elongation a:25.6%, rockwell hardness HRB:74.0.
7. the method of manufacturing 410 ferritic stainless steel according to claim 1, wherein: LF refining: slag formation and argon blowing are carried out on the molten steel in an LF furnace, and the argon blowing time is 8-12min.
8. The method for producing 410 ferritic stainless steel according to claim 1, wherein the ferrite content is not less than 95%, and the grain size is 9.0 to 10.0.
9. The method for manufacturing 410 ferritic stainless steel according to claim 1,
in slab continuous casting: the secondary cooling specific water quantity is 0.59L/Kg, the superheat degree is 25-30 ℃, and the pulling speed is constant at 0.80m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311072450.7A CN117604399A (en) | 2022-05-07 | 2022-05-07 | Manufacturing method of 410 ferrite stainless steel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311072450.7A CN117604399A (en) | 2022-05-07 | 2022-05-07 | Manufacturing method of 410 ferrite stainless steel |
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| JPS60248868A (en) * | 1984-05-23 | 1985-12-09 | Nisshin Steel Co Ltd | P-added ferritic stainless steel having excellent formability and fabrication property |
| CA2123470C (en) * | 1993-05-19 | 2001-07-03 | Yoshihiro Yazawa | Ferritic stainless steel exhibiting excellent atmospheric corrosion resistance and crevice corrosion resistance |
| WO2000060134A1 (en) * | 1999-03-30 | 2000-10-12 | Kawasaki Steel Corporation | Ferritic stainless steel plate |
| JP3581801B2 (en) * | 1999-06-22 | 2004-10-27 | 新日本製鐵株式会社 | Ferritic stainless steel sheet excellent in workability and surface properties and method for producing the same |
| JP4283425B2 (en) * | 2000-07-13 | 2009-06-24 | 新日鐵住金ステンレス株式会社 | Method for producing ferritic stainless steel sheet with excellent high temperature strength and magnetic properties |
| US6589363B2 (en) * | 2000-12-13 | 2003-07-08 | Eaton Corporation | Method for making heat treated stainless hydraulic components |
| CN101381845B (en) * | 2007-09-04 | 2010-12-15 | 宝山钢铁股份有限公司 | High-purity ferrite stainless steel material and manufacturing method thereof |
| JP5228994B2 (en) * | 2009-02-27 | 2013-07-03 | 新日鐵住金株式会社 | Manufacturing method of ferritic stainless steel material and manufacturing method of ferritic stainless steel pipe |
| CN101899625B (en) * | 2009-05-25 | 2012-05-30 | 宝山钢铁股份有限公司 | Ferrite stainless steel and manufacturing method thereof |
| CN103510022A (en) * | 2012-06-26 | 2014-01-15 | 宝钢不锈钢有限公司 | Control method for avoiding low Cr ferrite stainless steel hot rolling edge crack |
| CN105132819B (en) * | 2015-08-13 | 2016-11-30 | 山西太钢不锈钢股份有限公司 | A kind of method of low chrome ferritic stainless steel continuous rolling |
| CN106755791A (en) * | 2016-11-30 | 2017-05-31 | 邢台钢铁有限责任公司 | The annealing process of martensitic stain less steel 1Cr13 wire rods |
| CN106583449A (en) * | 2016-12-22 | 2017-04-26 | 山西太钢不锈钢股份有限公司 | Rolling method of ferritic stainless steel |
| JP6878060B2 (en) * | 2017-03-15 | 2021-05-26 | 日鉄ステンレス株式会社 | Ferritic stainless steel hot-rolled steel strip |
| CN110592494B (en) * | 2019-09-24 | 2021-01-15 | 王平 | Nickel-containing ferrite stainless steel smelted from laterite-nickel ore and preparation method thereof |
| CN113462967B (en) * | 2021-06-19 | 2022-05-17 | 山东盛阳金属科技股份有限公司 | 430 ferrite stainless steel production process |
| CN113604639B (en) * | 2021-08-09 | 2023-05-23 | 长春工业大学 | Heat treatment method for improving surface wrinkling of phase-change ferritic stainless steel |
| CN114214571A (en) * | 2021-11-24 | 2022-03-22 | 广西北海综红科技开发有限公司 | Ferritic stainless steel and preparation method thereof |
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