CN117403137A - Manufacturing method for improving F60 duplex stainless steel low-temperature impact energy - Google Patents
Manufacturing method for improving F60 duplex stainless steel low-temperature impact energy Download PDFInfo
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- CN117403137A CN117403137A CN202311633938.2A CN202311633938A CN117403137A CN 117403137 A CN117403137 A CN 117403137A CN 202311633938 A CN202311633938 A CN 202311633938A CN 117403137 A CN117403137 A CN 117403137A
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- 229910001039 duplex stainless steel Inorganic materials 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000005242 forging Methods 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 238000007670 refining Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000003723 Smelting Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 230000006698 induction Effects 0.000 claims abstract description 9
- 238000004321 preservation Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims description 6
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000005261 decarburization Methods 0.000 abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 5
- 239000010935 stainless steel Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000009864 tensile test Methods 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides F60 duplex stainless steel, which comprises the following components in percentage by mass: c is less than or equal to 0.030%; mn is less than or equal to 2.00%; p is less than or equal to 0.015 percent; s is less than or equal to 0.005%; si is less than or equal to 1.00%; ni is more than or equal to 5.60% and less than or equal to 6.50%; cr is more than or equal to 22.50 percent and less than or equal to 23.00 percent; mo is more than or equal to 3.00% and less than or equal to 3.50%; n is more than or equal to 0.14% and less than or equal to 0.20%; the balance being Fe; the invention also provides a manufacturing method of the F60 duplex stainless steel, which is characterized by comprising the following steps: s1, smelting: smelting raw materials by adopting an arc furnace or an induction furnace; s2, refining: refining raw materials by adopting an AOD (argon oxygen decarburization) and VOD (video on demand) method; s3, forging: when in forging heating, the heating temperature is controlled to 1190+/-15 ℃, the forging ratio is more than 4.5, and the final forging temperature is not lower than 920 ℃; s4, heat treatment: the solution treatment heating temperature is 1080+/-10 ℃, large water body is adopted for cooling, the water temperature is not higher than 45 ℃, and the heat preservation time is not longer than 4 hours. By the mode, the low-temperature impact performance of the duplex steel stainless steel can be improved.
Description
Technical Field
The invention relates to the field of stainless steel manufacturing, in particular to a manufacturing method for improving low-temperature impact energy of F60 duplex stainless steel.
Background
The duplex stainless steel is the stainless steel with the composition phases of austenite and ferrite, has the performance of both austenite and ferrite, has better plasticity, toughness and corrosion resistance than ferrite steel, and has obviously higher strength than the austenitic stainless steel. The duplex stainless steel is widely applied to heat exchangers, cold showers and other parts with seawater resistance, high temperature resistance, concentrated nitric acid resistance and the like in oil refining, chemical fertilizers, papermaking, nuclear power, petroleum, chemical industry and the like. The past standard or design file has no low-temperature performance requirement on the duplex steel stainless steel forging, and in recent years, the requirements of equipment and instruments on materials are continuously improved, and a plurality of ordering technical conditions increase the low-temperature impact performance of the duplex steel stainless steel. In order to improve the quality of the dual-phase steel flange and the forge piece of the company and increase the competitiveness of the product, the method is developed on this basis.
Disclosure of Invention
In order to solve the problems, the invention provides a manufacturing method for improving the low-temperature impact energy of F60 duplex stainless steel, which can improve the low-temperature impact performance of the duplex stainless steel.
The main content of the invention comprises: an F60 duplex stainless steel comprises the following components in percentage by mass:
c is less than or equal to 0.030%; mn is less than or equal to 2.00%; p is less than or equal to 0.015 percent; s is less than or equal to 0.005%; si is less than or equal to 1.00%; ni is more than or equal to 5.60% and less than or equal to 6.50%; cr is more than or equal to 22.50 percent and less than or equal to 23.00 percent; mo is more than or equal to 3.00% and less than or equal to 3.50%; n is more than or equal to 0.14% and less than or equal to 0.20%; the balance being Fe;
the invention also discloses a manufacturing method of the F60 duplex stainless steel, which comprises the following steps:
s1, smelting: smelting raw materials by adopting an arc furnace or an induction furnace;
s2, refining: refining raw materials by adopting an AOD or VOD method;
s3, forging: when in forging heating, the heating temperature is controlled to 1190+/-15 ℃, the forging ratio is more than 4.5, and the final forging temperature is not lower than 920 ℃;
s4, heat treatment: the solution treatment heating temperature is 1080+/-10 ℃, large water body is adopted for cooling, the water temperature is not higher than 45 ℃, and the heat preservation time is not longer than 4 hours.
Preferably, the raw material type is steel ingot or round steel.
Preferably, when selecting the steel ingot, the head and tail cutting percentage of the steel ingot is more than or equal to 15%, wherein the head cutting of the steel ingot is more than or equal to 10%, and the tail cutting of the steel ingot is more than or equal to 5%.
The content of Ni and Cr plays a key role in the low-temperature performance of the duplex stainless steel, the content range of chemical elements is adjusted, and the content of Ni and Cr is adjusted to the optimal content; p, S is a harmful element, and greatly reduces the content of the harmful element, thereby being beneficial to the promotion of impact energy.
The duplex stainless steel is small in forging temperature range, forging is not suitable for being performed at a high temperature or a low temperature section, the technological process is controlled, forging is performed at a proper temperature range, the forging ratio is properly increased, the forging structure is favorably eliminated, the micro defects are forged, and the low-temperature impact performance is improved.
The heat treatment cooling of the duplex stainless steel is very critical, the sufficient cooling can ensure that the phase proportion of the duplex stainless steel is in a normal range, if the cooling is insufficient, the phase proportion is abnormal, the material performance is affected, and the cooling effect is ensured by reasonably placing workpieces and circularly cooling a large water body of a cooling water tank.
Detailed Description
The technical scheme protected by the invention is specifically described below.
Example 1
The chemical compositions of the F60 duplex stainless steel provided in the embodiment are shown in the table one
List one
The manufacturing method of the F60 duplex stainless steel comprises the following steps:
s1, smelting: smelting raw materials by adopting an arc furnace or an induction furnace;
s2, refining: refining raw materials by adopting an AOD (argon oxygen decarburization) and VOD (video on demand) method;
s3, forging: when in forging heating, the heating temperature is controlled to be 1205 ℃, the forging ratio is more than 4.5, and the final forging temperature is not lower than 920 ℃;
s4, heat treatment: the solution treatment heating temperature is 1090 ℃, large water body cooling is adopted, the water temperature is not higher than 45 ℃, and the heat preservation time is not longer than 4 hours.
Example 2
The chemical composition of the F60 duplex stainless steel provided in the embodiment is shown in Table II
Watch II
The manufacturing method of the F60 duplex stainless steel comprises the following steps:
s1, smelting: smelting raw materials by adopting an arc furnace or an induction furnace;
s2, refining: refining raw materials by adopting an AOD (argon oxygen decarburization) and VOD (video on demand) method;
s3, forging: when in forging heating, the heating temperature is controlled to 1175 ℃, the forging ratio is more than 4.5, and the final forging temperature is not lower than 920 ℃;
s4, heat treatment: the solution treatment heating temperature is 1070 ℃, large water body is adopted for cooling, the water temperature is not higher than 45 ℃, and the heat preservation time is not more than 4 hours.
Example 3
The chemical compositions of the F60 duplex stainless steel provided in the embodiment are shown in Table III
Watch III
The manufacturing method of the F60 duplex stainless steel comprises the following steps:
s1, smelting: smelting raw materials by adopting an arc furnace or an induction furnace;
s2, refining: refining raw materials by adopting an AOD (argon oxygen decarburization) and VOD (video on demand) method;
s3, forging: when in forging heating, the heating temperature is controlled to be 1205 ℃, the forging ratio is more than 4.5, and the final forging temperature is not lower than 920 ℃;
s4, heat treatment: the solution treatment heating temperature is 1090 ℃, large water body cooling is adopted, the water temperature is not higher than 45 ℃, and the heat preservation time is not longer than 4 hours.
Example 4
The chemical compositions of the F60 duplex stainless steel provided in the embodiment are shown in Table four
Table four
The manufacturing method of the F60 duplex stainless steel comprises the following steps:
s1, smelting: smelting raw materials by adopting an arc furnace or an induction furnace;
s2, refining: refining raw materials by adopting an AOD (argon oxygen decarburization) and VOD (video on demand) method;
s3, forging: when in forging heating, the heating temperature is controlled to 1175 ℃, the forging ratio is more than 4.5, and the final forging temperature is not lower than 920 ℃;
s4, heat treatment: the solution treatment heating temperature is 1070 ℃, large water body is adopted for cooling, the water temperature is not higher than 45 ℃, and the heat preservation time is not more than 4 hours.
Comparative example 1
The chemical composition of the F60 duplex stainless steel provided in comparative example 1 is shown in Table five
TABLE five
The manufacturing method of the F60 duplex stainless steel comprises the following steps:
s1, smelting: smelting raw materials by adopting an arc furnace or an induction furnace;
s2, refining: refining raw materials by adopting an AOD (argon oxygen decarburization) and VOD (video on demand) method;
s3, forging: when in forging heating, the heating temperature is controlled to 960 ℃, the forging ratio is more than 3.5, and the final forging temperature is not lower than 920 ℃;
s4, heat treatment: the solution treatment heating temperature is 980 ℃, large water body is adopted for cooling, the water temperature is not higher than 45 ℃, and the heat preservation time is not more than 4 hours.
Comparative example 2
Comparative example 1
The chemical composition of the F60 duplex stainless steel provided in comparative example 2 is shown in Table six
TABLE six
The manufacturing method of the F60 duplex stainless steel comprises the following steps:
s1, smelting: smelting raw materials by adopting an arc furnace or an induction furnace;
s2, refining: refining raw materials by adopting an AOD (argon oxygen decarburization) and VOD (video on demand) method;
s3, forging: when in forging heating, the heating temperature is controlled to 1175 ℃, the forging ratio is more than 4.5, and the final forging temperature is not lower than 920 ℃;
s4, heat treatment: the solution treatment heating temperature is 1070 ℃, large water body is adopted for cooling, the water temperature is not higher than 45 ℃, and the heat preservation time is not more than 4 hours.
Room temperature tensile test and hardness test were conducted in accordance with ASTM SA-370
Watch seven
From the table above, it can be seen that: in examples 1-4, the Ni element content was increased, the S element content was decreased, the forging process and the heat treatment process were varied within the ranges given in the development, and the mechanical properties obtained by the processes were not substantially different in room temperature stretching, but the impact energy was significantly higher than in the comparative examples.
In comparative example 1, the chemical composition, the conventional forging process and the heat treatment process within the scope of the application are used, the low-temperature impact power is higher than that of the conventional process of the conventional chemical composition, and the impact power of the conventional process is only about 20J. The chemical composition adjustment is effective in improving low-temperature impact energy.
The forging process and the heat treatment process in comparative example 2, which use conventional chemical components and the forging process and the heat treatment process in the present application, show that the low-temperature impact work is higher than the conventional process of conventional chemical components, and the forging process and the heat treatment process of the invention patent have an effect of improving the low-temperature impact work.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present invention.
Claims (4)
1. The F60 duplex stainless steel is characterized by comprising the following components in percentage by mass:
c is less than or equal to 0.030%; mn is less than or equal to 2.00%; p is less than or equal to 0.015 percent; s is less than or equal to 0.005%; si is less than or equal to 1.00%; ni is more than or equal to 5.60% and less than or equal to 6.50%; cr is more than or equal to 22.50 percent and less than or equal to 23.00 percent; mo is more than or equal to 3.00% and less than or equal to 3.50%; n is more than or equal to 0.14% and less than or equal to 0.20%; the balance being Fe.
2. A method for manufacturing the F60 duplex stainless steel according to claim 1, comprising the steps of:
s1, smelting: smelting raw materials by adopting an arc furnace or an induction furnace;
s2, refining: refining raw materials by adopting an AOD or VOD method;
s3, forging: when in forging heating, the heating temperature is controlled to 1190+/-15 ℃, the forging ratio is more than 4.5, and the final forging temperature is not lower than 920 ℃;
s4, heat treatment: the solution treatment heating temperature is 1080+/-10 ℃, large water body is adopted for cooling, the water temperature is not higher than 45 ℃, and the heat preservation time is not longer than 4 hours.
3. The method for manufacturing the F60 duplex stainless steel according to claim 2, wherein: the raw material type is steel ingot or round steel.
4. The method for manufacturing an F60 duplex stainless steel according to claim 4, wherein: when the steel ingot is selected, the head and tail cutting percentage of the steel ingot is more than or equal to 15 percent, wherein the head cutting percentage of the steel ingot is more than or equal to 10 percent, and the tail cutting percentage of the steel ingot is more than or equal to 5 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311633938.2A CN117403137A (en) | 2023-11-30 | 2023-11-30 | Manufacturing method for improving F60 duplex stainless steel low-temperature impact energy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311633938.2A CN117403137A (en) | 2023-11-30 | 2023-11-30 | Manufacturing method for improving F60 duplex stainless steel low-temperature impact energy |
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| Publication Number | Publication Date |
|---|---|
| CN117403137A true CN117403137A (en) | 2024-01-16 |
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| CN202311633938.2A Pending CN117403137A (en) | 2023-11-30 | 2023-11-30 | Manufacturing method for improving F60 duplex stainless steel low-temperature impact energy |
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2023
- 2023-11-30 CN CN202311633938.2A patent/CN117403137A/en active Pending
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