CN112501521A - Processing method of ultrahigh-strength aviation structural steel - Google Patents
Processing method of ultrahigh-strength aviation structural steel Download PDFInfo
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- CN112501521A CN112501521A CN202011383236.XA CN202011383236A CN112501521A CN 112501521 A CN112501521 A CN 112501521A CN 202011383236 A CN202011383236 A CN 202011383236A CN 112501521 A CN112501521 A CN 112501521A
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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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
Abstract
The invention discloses a processing method of ultrahigh-strength aviation structural steel, and relates to the technical field of structural steel processing. The processing method of the ultrahigh-strength aviation structural steel comprises the following steps: taking corresponding raw materials according to the element proportion, adding the raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing inert gas into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, then hot rolling, finally cooling again and tempering; the processing method of the ultrahigh-strength aviation structural steel can reduce bubbles in a finished product when molten steel is subjected to injection molding, so that the strength of the structural steel is improved, and further the yield strength, tensile strength, elongation and impact energy of the structural steel are improved.
Description
Technical Field
The invention relates to a processing method of structural steel, in particular to a processing method of ultrahigh-strength aviation structural steel.
Background
The ultra-high strength steel generally refers to a high strength structural steel with yield strength higher than 1400MPa and with certain toughness and plasticity. After quenching treatment, the hardness of the steel can reach more than 50HR/C, and the steel is a typical important steel grade characterized by high strength and high hardness. At present, the ultra-high strength steel is widely applied to aerospace and military important parts such as rocket engine shells, aircraft landing gears and the like, and along with the continuous improvement of the technological properties of the ultra-high strength steel, the application range of the ultra-high strength steel is continuously expanded to the fields of mechanical manufacturing, vehicles and other civil use due to excellent mechanical properties.
High-strength structural steel is often required in aeronautical manufacturing, and the requirements on the structural steel are more strict; the processing process of the existing high-strength structural steel is relatively complex due to the excellent performance of the high-strength structural steel, although people have continuously explored the high-strength structural steel and obtained some gains, a better solution is not obtained for the problem of reducing bubbles in a finished steel structure in the processing process, and therefore the invention provides the processing method of the ultrahigh-strength aviation structural steel capable of reducing the bubbles in the steel structure.
Disclosure of Invention
The invention aims to provide a tea for clearing fire, soothing nerves and aiding sleep, which comprises orange peel, gynostemma pentaphylla, Chinese angelica, polygala tenuifolia, xylitol, honey, chrysanthemum morifolium, rhodiola rosea, calcium lactate and honeysuckle, wherein the orange peel and the gynostemma pentaphylla have a synergistic interaction effect, so that the effect of the tea for clearing fire, soothing nerves and aiding sleep can be enhanced, and the effect taking time is greatly accelerated.
In order to achieve the purpose, the invention provides the following technical scheme:
a processing method of ultrahigh-strength aviation structural steel comprises the following element components in percentage by mass: 0.10 to 0.15% of C, 0.25 to 0.45% of Si, 1.4 to 1.8% of Mn, 0.001 to 0.010% of P, 0.0001 to 0.001% of S, 0.12 to 0.22% of Mo, 0.02 to 0.06% of Cr, 0.03 to 0.07% of Nb, 0.01 to 0.02% of Al, and the balance of Fe; the yield strength of the ultrahigh-strength aviation structural steel is more than or equal to 1400Mp, the tensile strength is more than or equal to 1000Mp, the elongation is more than or equal to 18%, and the 0 ℃ impact is more than or equal to 80J;
the processing method of the ultrahigh-strength aviation structural steel comprises the following steps:
(1) taking corresponding raw materials according to the element proportion, adding the raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing inert gas into the stirring mechanism;
(1) the smelted molten steel is cast into a plurality of same molds to obtain steel ingots;
(3) heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out;
(4) hot rolling, namely firstly carrying out rough rolling at the beginning rolling temperature of 1200-1300 ℃, and then carrying out finish rolling at the inlet temperature of 1000-1100 ℃ and the final rolling temperature of 800-850 ℃;
(5) cooling, wherein the cooling speed is more than or equal to 10 ℃/s, and the final cooling temperature is less than or equal to 80 ℃;
(6) tempering treatment is carried out, wherein the tempering temperature is 180-240 ℃.
As a further scheme of the invention: the high-strength aviation structure steel comprises the following element components in percentage by mass: 0.11 to 0.14% of C, 0.30 to 0.40% of Si, 1.5 to 1.7% of Mn, 0.003 to 0.008% of P, 0.0002 to 0.0008% of S, 0.15 to 0.20% of Mo, 0.03 to 0.05% of Cr, 0.04 to 0.06% of Nb and 0.012 to 0.018% of Al.
As a further scheme of the invention: the high-strength aviation structure steel comprises the following element components in percentage by mass: 0.13% of C, 0.35% of Si, 1.6% of Mn, 0.005% of P, 0.0006% of S, 0.18% of Mo, 0.04% of Cr, 0.05% of Nb and 0.015% of Al.
As a further scheme of the invention: the inert gas is argon.
As a further scheme of the invention: after rough rolling, the head and tail of the rolled sheet are replaced, and then finish rolling is performed.
As a further scheme of the invention: the cooling mode can also be air cooling.
As a further scheme of the invention: the final cooling temperature of the air cooling is room temperature.
Compared with the prior art, the invention has the beneficial effects that:
according to the processing method of the ultrahigh-strength aviation structural steel, the stirring mechanism is arranged in the steel casting furnace, and argon is introduced into the stirring mechanism, so that the argon is blown to molten steel to be smelted through the stirring shaft and the air holes in the stirring rod, bubbles in the molten steel are blown to be broken, the bubbles in the molten steel are greatly reduced, the bubbles in finished products can be reduced when the molten steel is subjected to injection molding, the strength of the structural steel is improved, and the yield strength, the tensile strength, the elongation and the impact energy of the structural steel are improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
According to the processing method of the ultrahigh-strength aviation structural steel, the stirring mechanism is arranged in the steel casting furnace, and argon is introduced into the stirring mechanism, so that the argon is blown to molten steel to be smelted through the stirring shaft and the air holes in the stirring rod, bubbles in the molten steel are blown to be broken, the bubbles in the molten steel are greatly reduced, the bubbles in finished products can be reduced when the molten steel is subjected to injection molding, the strength of the structural steel is improved, and the yield strength, the tensile strength, the elongation and the impact energy of the structural steel are improved.
Example 1
Preparing the following element components in percentage by mass: 0.10% of C, 0.25% of Si, 1.4% of Mn, 0.001% of P, 0.0001% of S, 0.12% of Mo, 0.02% of Cr, 0.03% of Nb, 0.01% of Al and the balance of iron; adding the prepared raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1220 ℃, after rough rolling, the head and the tail of the rolled plate are replaced, then finish rolling is carried out, the inlet temperature ranges from 1020 ℃, the final rolling temperature is 800 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 190 ℃.
Example 2
Preparing the following element components in percentage by mass: 0.11% of C, 0.30% of Si, 1.5% of Mn, 0.003% of P, 0.0002% of S, 0.15% of Mo, 0.03% of Cr, 0.04% of Nb, 0.012% of Al and the balance of iron; adding the prepared raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1240 ℃, after the rough rolling, the head and the tail of the rolled plate are replaced, then finish rolling is carried out, the inlet temperature is 1040 ℃, the final rolling temperature is 810 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 200 ℃.
Example 3
Preparing the following element components in percentage by mass: 0.13% of C, 0.35% of Si, 1.6% of Mn, 0.005% of P, 0.0006% of S, 0.18% of Mo, 0.04% of Cr, 0.05% of Nb, 0.015% of Al and the balance of iron; adding the prepared raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1260 ℃, after rough rolling, the head and the tail of the rolled plate are replaced, then finish rolling is carried out, the inlet temperature is 1060 ℃, the final rolling temperature is 820 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 210 ℃.
Example 4
Preparing the following element components in percentage by mass: 0.14 percent of C, 0.40 percent of Si, 1.7 percent of Mn, 0.008 percent of P, 0.0008 percent of S, 0.20 percent of Mo, 0.05 percent of Cr, 0.06 percent of Nb, 0.018 percent of Al and the balance of iron; adding the prepared raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1280 ℃, after rough rolling, the head and the tail of a rolled plate are replaced, then finish rolling is carried out, the inlet temperature ranges from 1080 ℃, the final rolling temperature is 830 ℃, and then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 220 ℃.
Example 5
Preparing the following element components in percentage by mass: 0.15% of C, 0.45% of Si, 1.8% of Mn, 0.010% of P, 0.001% of S, 0.22% of Mo, 0.06% of Cr, 0.07% of Nb, 0.02% of Al and the balance of iron; adding the prepared raw materials into a steel casting furnace for smelting, arranging a stirring mechanism in the steel casting furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1300 ℃, after rough rolling, the head and the tail of a rolled plate are replaced, then finish rolling is carried out, the inlet temperature is 1100 ℃, the final rolling temperature is 800 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 230 ℃.
The operational data for examples 1-5 are set forth in the following table:
test examples
And (3) respectively carrying out performance tests on five groups of produced structural steel according to the processing methods in the embodiments 1-5, wherein the performance tests comprise yield strength, tensile strength, elongation, 0 ℃ impact and quality tests, and the test methods are carried out according to a laboratory standard test method.
Test example 1
Preparing the following element components in percentage by mass: 0.10% of C, 0.25% of Si, 1.4% of Mn, 0.001% of P, 0.0001% of S, 0.12% of Mo, 0.02% of Cr, 0.03% of Nb, 0.01% of Al and the balance of iron; adding the prepared raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1220 ℃, after rough rolling, the head and the tail of the rolled plate are replaced, then finish rolling is carried out, the inlet temperature ranges from 1020 ℃, the final rolling temperature is 800 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 190 ℃.
The steel structure was manufactured according to the above processing method, and the yield strength, tensile strength, elongation, 0 ℃ impact and quality of the steel plate were tested according to the laboratory standard test method, taking a steel plate having a volume of 50 × 30 × 10 mmd.
Test example 2
Preparing the following element components in percentage by mass: 0.11% of C, 0.30% of Si, 1.5% of Mn, 0.003% of P, 0.0002% of S, 0.15% of Mo, 0.03% of Cr, 0.04% of Nb, 0.012% of Al and the balance of iron; adding the prepared raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1240 ℃, after the rough rolling, the head and the tail of the rolled plate are replaced, then finish rolling is carried out, the inlet temperature is 1040 ℃, the final rolling temperature is 810 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 200 ℃.
The steel structure was manufactured according to the above processing method, and the yield strength, tensile strength, elongation, 0 ℃ impact and quality of the steel plate were tested according to the laboratory standard test method, taking a steel plate having a volume of 50 × 30 × 10 mmd.
Test example 3
Preparing the following element components in percentage by mass: 0.13% of C, 0.35% of Si, 1.6% of Mn, 0.005% of P, 0.0006% of S, 0.18% of Mo, 0.04% of Cr, 0.05% of Nb, 0.015% of Al and the balance of iron; adding the prepared raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1260 ℃, after rough rolling, the head and the tail of the rolled plate are replaced, then finish rolling is carried out, the inlet temperature is 1060 ℃, the final rolling temperature is 820 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 210 ℃.
The steel structure was manufactured according to the above described process, and the yield strength, tensile strength, elongation, 0 ℃ impact and quality of the steel plate were tested according to the laboratory standard test method, taking a steel plate with a volume of 50 x 30 x 10 mm.
Test example 4
Preparing the following element components in percentage by mass: 0.14 percent of C, 0.40 percent of Si, 1.7 percent of Mn, 0.008 percent of P, 0.0008 percent of S, 0.20 percent of Mo, 0.05 percent of Cr, 0.06 percent of Nb, 0.018 percent of Al and the balance of iron; adding the prepared raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1280 ℃, after rough rolling, the head and the tail of a rolled plate are replaced, then finish rolling is carried out, the inlet temperature ranges from 1080 ℃, the final rolling temperature is 830 ℃, and then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 220 ℃.
The steel structure was manufactured according to the above processing method, and the yield strength, tensile strength, elongation, 0 ℃ impact and quality of the steel plate were tested according to the laboratory standard test method, taking a steel plate having a volume of 50 × 30 × 10 mmd.
Test example 5
Preparing the following element components in percentage by mass: 0.15% of C, 0.45% of Si, 1.8% of Mn, 0.010% of P, 0.001% of S, 0.22% of Mo, 0.06% of Cr, 0.07% of Nb, 0.02% of Al and the balance of iron; adding the prepared raw materials into a steel casting furnace for smelting, arranging a stirring mechanism in the steel casting furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing argon into the stirring mechanism; the smelted molten steel is cast into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1300 ℃, after rough rolling, the head and the tail of a rolled plate are replaced, then finish rolling is carried out, the inlet temperature is 1100 ℃, the final rolling temperature is 800 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 230 ℃.
The steel structure was manufactured according to the above processing method, and the yield strength, tensile strength, elongation, 0 ℃ impact and quality of the steel plate were tested according to the laboratory standard test method, taking a steel plate having a volume of 50 × 30 × 10 mmd.
The test results of the 1 to 5 test examples are listed in the following table:
| yield strength | Tensile strength | Elongation percentage | 0 ℃ impact energy | Quality of | |
| Test example 1 | 1462Mp | 1113Mp | 18.6％ | 89J | 116.75g |
| Test example 2 | 1470Mp | 1134Mp | 19.6％ | 90J | 116.71g |
| Test example 3 | 1488Mp | 1211Mp | 21％ | 96J | 116.69g |
| Test example 4 | 1465Mp | 1109Mp | 18.4％ | 89J | 116.72g |
| Test example 5 | 1459Mp | 1101Mp | 18.3％ | 85J | 116.73g |
It can be seen from the data in the above tables that the steel sheets in test examples 1 to 5 all achieved high strength in performance; wherein the yield strength is more than 1400Mp, the tensile strength is more than 1000Mp, the elongation is more than 18 percent, the impact at 0 ℃ is more than 80J, and the mass is about 116.70.
Comparative example
Comparative example 1
Preparing the following element components in percentage by mass: 0.10% of C, 0.25% of Si, 1.4% of Mn, 0.001% of P, 0.0001% of S, 0.12% of Mo, 0.02% of Cr, 0.03% of Nb, 0.01% of Al and the balance of iron; adding the prepared raw materials into a steel casting furnace for smelting, and casting the smelted molten steel into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then steel is tapped; rough rolling is carried out after tapping, the initial rolling temperature is 1220 ℃, after rough rolling, the head and the tail of the rolled plate are replaced, then finish rolling is carried out, the inlet temperature ranges from 1020 ℃, the final rolling temperature is 800 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 190 ℃.
The yield strength, tensile strength, elongation, 0 ℃ impact and mass of the steel plate were measured according to standard laboratory test methods using a steel plate having a volume of 50 × 30 × 10 mmd.
Comparative example 2
Preparing the following element components in percentage by mass: 0.11% of C, 0.30% of Si, 1.5% of Mn, 0.003% of P, 0.0002% of S, 0.15% of Mo, 0.03% of Cr, 0.04% of Nb, 0.012% of Al and the balance of iron; adding the prepared raw materials into a steel casting furnace for smelting, and casting the smelted molten steel into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then steel is tapped; rough rolling is carried out after tapping, the initial rolling temperature is 1240 ℃, after the rough rolling, the head and the tail of the rolled plate are replaced, then finish rolling is carried out, the inlet temperature is 1040 ℃, the final rolling temperature is 810 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 200 ℃.
The yield strength, tensile strength, elongation, 0 ℃ impact and mass of the steel plate were measured according to standard laboratory test methods using a steel plate having a volume of 50 × 30 × 10 mmd.
Comparative example 3
Preparing the following element components in percentage by mass: 0.13% of C, 0.35% of Si, 1.6% of Mn, 0.005% of P, 0.0006% of S, 0.18% of Mo, 0.04% of Cr, 0.05% of Nb, 0.015% of Al and the balance of iron; adding the prepared raw materials into a steel casting furnace for smelting, and casting the smelted molten steel into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then steel is tapped; rough rolling is carried out after tapping, the initial rolling temperature is 1260 ℃, after rough rolling, the head and the tail of the rolled plate are replaced, then finish rolling is carried out, the inlet temperature is 1060 ℃, the final rolling temperature is 820 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 210 ℃.
The yield strength, tensile strength, elongation, 0 ℃ impact and mass of the steel plate were measured according to standard laboratory test methods using a steel plate having a volume of 50 × 30 × 10 mmd.
Comparative example 4
Preparing the following element components in percentage by mass: 0.14 percent of C, 0.40 percent of Si, 1.7 percent of Mn, 0.008 percent of P, 0.0008 percent of S, 0.20 percent of Mo, 0.05 percent of Cr, 0.06 percent of Nb, 0.018 percent of Al and the balance of iron; adding the prepared raw materials into a steel casting furnace for smelting, and casting the smelted molten steel into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then steel is tapped; rough rolling is carried out after tapping, the initial rolling temperature is 1280 ℃, after rough rolling, the head and the tail of a rolled plate are replaced, then finish rolling is carried out, the inlet temperature ranges from 1080 ℃, the final rolling temperature is 830 ℃, and then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 220 ℃.
The yield strength, tensile strength, elongation, 0 ℃ impact and mass of the steel plate were measured according to standard laboratory test methods using a steel plate having a volume of 50 × 30 × 10 mmd.
Comparative example 5
Preparing the following element components in percentage by mass: 0.15% of C, 0.45% of Si, 1.8% of Mn, 0.010% of P, 0.001% of S, 0.22% of Mo, 0.06% of Cr, 0.07% of Nb, 0.02% of Al and the balance of iron; adding the prepared raw materials into a steel casting furnace for smelting, and casting the smelted molten steel into a plurality of same molds to obtain steel ingots; heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out; rough rolling is carried out after tapping, the initial rolling temperature is 1300 ℃, after rough rolling, the head and the tail of a rolled plate are replaced, then finish rolling is carried out, the inlet temperature is 1100 ℃, the final rolling temperature is 800 ℃, then cooling is carried out, the cooling speed is 15 ℃/s, and the final cooling temperature is 70 ℃; after cooling, tempering treatment is carried out, wherein the tempering temperature is 230 ℃.
The yield strength, tensile strength, elongation, 0 ℃ impact and mass of the steel plate were measured according to standard laboratory test methods using a steel plate having a volume of 50 × 30 × 10 mmd.
The test results for comparative examples 1-5 are listed below:
| yield strength | Tensile strength | Elongation percentage | 0 ℃ impact energy | Quality of | |
| Comparative example 1 | 1452Mp | 1108Mp | 17.1％ | 80J | 116.59g |
| Comparative example 2 | 1461Mp | 1123Mp | 18.1％ | 82J | 116.55g |
| Comparative example 3 | 1470Mp | 1199Mp | 19％ | 88J | 116.50g |
| Comparative example 4 | 1455Mp | 1090Mp | 17.6％ | 79J | 116.52g |
| Comparative example 5 | 1451Mp | 1087Mp | 17.1％ | 75J | 116.53g |
According to the above table, it can be observed that, in comparative examples 1 to 5, compared with the side-view results of corresponding test examples 1 to 5, the results of four strength tests, namely yield strength, tensile strength, elongation and 0 ℃ impact, are all reduced, and the quality is about 116.50g, which is relatively reduced, so that when the operation step of 'arranging a stirring mechanism in a steel casting furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism and introducing argon gas into the stirring mechanism' is removed, the internal bubbles of the steel structure become more, the performance is poor and the quality is slightly reduced;
therefore, the processing method of the ultrahigh-strength aviation structural steel provided by the invention can effectively reduce bubbles in the steel structure and improve the strength of the steel structure.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The processing method of the ultrahigh-strength aviation structural steel is characterized by comprising the following element components in percentage by mass: 0.10 to 0.15% of C, 0.25 to 0.45% of Si, 1.4 to 1.8% of Mn, 0.001 to 0.010% of P, 0.0001 to 0.001% of S, 0.12 to 0.22% of Mo, 0.02 to 0.06% of Cr, 0.03 to 0.07% of Nb, 0.01 to 0.02% of Al, and the balance of Fe; the yield strength of the ultrahigh-strength aviation structural steel is more than or equal to 1400Mp, the tensile strength is more than or equal to 1000Mp, the elongation is more than or equal to 18%, and the 0 ℃ impact is more than or equal to 80J;
the processing method of the ultrahigh-strength aviation structural steel comprises the following steps:
(1) taking corresponding raw materials according to the element proportion, adding the raw materials into a cast steel furnace for smelting, arranging a stirring mechanism in the cast steel furnace, forming air holes on a stirring shaft and stirring blades in the stirring mechanism, and introducing inert gas into the stirring mechanism;
(1) the smelted molten steel is cast into a plurality of same molds to obtain steel ingots;
(3) heating the steel ingot, wherein the initial temperature is 650 ℃, the time is 4h, the heating rate is 120 ℃/h, when the temperature reaches 1130 ℃, the temperature is kept for 8h, and when the temperature is raised to 1500 ℃, the temperature is kept for 18h, and then tapping is carried out;
(4) hot rolling, namely firstly carrying out rough rolling at the beginning rolling temperature of 1200-1300 ℃, and then carrying out finish rolling at the inlet temperature of 1000-1100 ℃ and the final rolling temperature of 800-850 ℃;
(5) cooling, wherein the cooling speed is more than or equal to 10 ℃/s, and the final cooling temperature is less than or equal to 80 ℃;
(6) tempering treatment is carried out, wherein the tempering temperature is 180-240 ℃.
2. The processing method of the ultrahigh-strength aerospace structural steel of claim 1, wherein the high-strength aerospace structural steel comprises the following elemental compositions in mass percent: 0.11 to 0.14% of C, 0.30 to 0.40% of Si, 1.5 to 1.7% of Mn, 0.003 to 0.008% of P, 0.0002 to 0.0008% of S, 0.15 to 0.20% of Mo, 0.03 to 0.05% of Cr, 0.04 to 0.06% of Nb and 0.012 to 0.018% of Al.
3. The processing method of the ultrahigh-strength aerospace structural steel of claim 1, wherein the high-strength aerospace structural steel comprises the following elemental compositions in mass percent: 0.13% of C, 0.35% of Si, 1.6% of Mn, 0.005% of P, 0.0006% of S, 0.18% of Mo, 0.04% of Cr, 0.05% of Nb and 0.015% of Al.
4. A processing method for an ultrahigh-strength aviation structural steel as claimed in any one of claims 1 to 3, wherein the inert gas is argon gas.
5. A method of processing an ultra-high strength aerospace structural steel according to any one of claims 1 to 3, wherein the head and tail of the rolled plate are replaced after rough rolling, and then finish rolling is performed.
6. The method for processing the ultrahigh-strength aviation structural steel as claimed in any one of claims 1 to 3, wherein the cooling mode is air cooling.
7. The method of processing an ultra-high strength aerospace structural steel of claim 6, wherein the final cooling temperature for air cooling is room temperature.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2110454A1 (en) * | 2008-01-22 | 2009-10-21 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Forging steel, and forged products obtainable therefrom |
| CN101886228A (en) * | 2009-05-13 | 2010-11-17 | 中国科学院金属研究所 | Low carbon martensite aged stainless steel with high strength high toughness and high decay resistance performances |
| CN102162065A (en) * | 2011-03-27 | 2011-08-24 | 莱芜钢铁集团有限公司 | 550Mpa yield-strength low-carbon bainitic steel for engineering machinery and preparation method thereof |
| CN102275083A (en) * | 2011-06-27 | 2011-12-14 | 西安市康铖机械制造有限公司 | Work piece positioning device in T-shaped groove of working table |
| CN103343281A (en) * | 2012-10-31 | 2013-10-09 | 钢铁研究总院 | Lamellar double-phase high-strength and high-toughness steel and preparation method thereof |
| CN103397196A (en) * | 2013-08-03 | 2013-11-20 | 郭自刚 | Refining apparatus and technology of pressure casting aluminium product |
| CN104232968A (en) * | 2014-09-08 | 2014-12-24 | 广西南南铝加工有限公司 | Method for degassing and refining large-specification 2XXX aluminum alloy cast ingot |
| US20170233855A1 (en) * | 2016-02-15 | 2017-08-17 | Seoul National University R&Db Foundation | High entropy alloy having twip/trip property and manufacturing method for the same |
| CN108823447A (en) * | 2018-09-10 | 2018-11-16 | 沈阳恒进真空科技有限公司 | A kind of melting timeliness all-in-one oven being used to prepare foamed alloy |
| JP2019210544A (en) * | 2018-05-31 | 2019-12-12 | Ｊｆｅスチール株式会社 | Manufacturing method of grain-oriented electromagnetic steel sheet |
| US10563281B2 (en) * | 2015-04-08 | 2020-02-18 | Nippon Steel Corporation | Heat-treated steel sheet member and method for producing the same |
| CN111748717A (en) * | 2020-06-30 | 2020-10-09 | 马鞍山海华耐磨材料科技有限公司 | Wear-resistant casting made of metal-based ceramic composite material and machining process of wear-resistant casting |
-
2020
- 2020-11-30 CN CN202011383236.XA patent/CN112501521A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2110454A1 (en) * | 2008-01-22 | 2009-10-21 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Forging steel, and forged products obtainable therefrom |
| CN101886228A (en) * | 2009-05-13 | 2010-11-17 | 中国科学院金属研究所 | Low carbon martensite aged stainless steel with high strength high toughness and high decay resistance performances |
| CN102162065A (en) * | 2011-03-27 | 2011-08-24 | 莱芜钢铁集团有限公司 | 550Mpa yield-strength low-carbon bainitic steel for engineering machinery and preparation method thereof |
| CN102275083A (en) * | 2011-06-27 | 2011-12-14 | 西安市康铖机械制造有限公司 | Work piece positioning device in T-shaped groove of working table |
| CN103343281A (en) * | 2012-10-31 | 2013-10-09 | 钢铁研究总院 | Lamellar double-phase high-strength and high-toughness steel and preparation method thereof |
| CN103397196A (en) * | 2013-08-03 | 2013-11-20 | 郭自刚 | Refining apparatus and technology of pressure casting aluminium product |
| CN104232968A (en) * | 2014-09-08 | 2014-12-24 | 广西南南铝加工有限公司 | Method for degassing and refining large-specification 2XXX aluminum alloy cast ingot |
| US10563281B2 (en) * | 2015-04-08 | 2020-02-18 | Nippon Steel Corporation | Heat-treated steel sheet member and method for producing the same |
| US20170233855A1 (en) * | 2016-02-15 | 2017-08-17 | Seoul National University R&Db Foundation | High entropy alloy having twip/trip property and manufacturing method for the same |
| JP2019210544A (en) * | 2018-05-31 | 2019-12-12 | Ｊｆｅスチール株式会社 | Manufacturing method of grain-oriented electromagnetic steel sheet |
| CN108823447A (en) * | 2018-09-10 | 2018-11-16 | 沈阳恒进真空科技有限公司 | A kind of melting timeliness all-in-one oven being used to prepare foamed alloy |
| CN111748717A (en) * | 2020-06-30 | 2020-10-09 | 马鞍山海华耐磨材料科技有限公司 | Wear-resistant casting made of metal-based ceramic composite material and machining process of wear-resistant casting |
Non-Patent Citations (1)
| Title |
|---|
| 李杞仪: "《机械工程基础》", 31 March 2010, 中国轻工业出版社 * |
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