CN107746934A - A kind of corrosion-resistant low-alloy high-strength steel plate and production method - Google Patents
A kind of corrosion-resistant low-alloy high-strength steel plate and production method Download PDFInfo
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- CN107746934A CN107746934A CN201710971946.6A CN201710971946A CN107746934A CN 107746934 A CN107746934 A CN 107746934A CN 201710971946 A CN201710971946 A CN 201710971946A CN 107746934 A CN107746934 A CN 107746934A
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Abstract
The invention discloses a kind of corrosion-resistant low-alloy high-strength steel plate and production method, the chemical composition composition and weight/mass percentage composition of the steel plate are：C：0.07~0.10%, Si：0.30~0.40%, Mn：0.65~0.85%, P≤0.010%, S≤0.005%, Al：0.30~0.50%, Cr：2.15~2.35%, Mo：0.35~0.50%, Cu≤0.20%, Ni≤0.20%, surplus are Fe and inevitable impurity；Plate Production method includes smelting, continuous casting, heating, rolling and heat treatment step.The features such as steel plate of the present invention has consistency high, and intensity rank and hardness are moderate, and 20 DEG C of low-temperature impact toughness and hydrogen sulfide corrosion resistance can be excellent, has good combination property and welding performance, disclosure satisfy that the requirement of pressure vessel hydrogen sulfide corrosion resistant steel.
Description
Technical field
The invention belongs to metallurgical technology field, is related to a kind of corrosion-resistant low-alloy high-strength steel plate and production method, specifically
It is related to a kind of H20-H2It is corrosion-resistant under S-HCL environment to use low-alloy high-strength steel plate and production method.
Background technology
In recent years, with the fast development of the development of the national economy, for H20-H2It is corrosion-resistant under S-HCL environment to use low-alloy
The demand of high strength steel plate becomes increasingly conspicuous, and market is for H20-H2The corrosion-resistant demand with low-alloy high-strength steel plate is got under S-HCL environment
Come bigger.For a long time due to lacking necessary production equipment and technical support, simultaneously because domestic without production H20-H2S-
The corrosion-resistant mature experience with low-alloy high-strength steel plate under HCL environment, cause can not meet the needs of domestic market, it is serious to restrict
The development of Chinese national economy construction.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of corrosion-resistant low-alloy high-strength steel plate；The present invention also carries simultaneously
For a kind of production method of corrosion-resistant low-alloy high-strength steel plate.The steel plate is applied to H20-H2Under S-HCL environment, Neng Gouman
The requirement of sufficient pressure vessel hydrogen sulfide corrosion resistant steel.
In order to solve the above technical problems, the present invention adopts the technical scheme that：A kind of corrosion-resistant low-alloy high-strength steel plate,
The chemical composition of the steel plate forms and its weight/mass percentage composition is：C：0.07~0.10%, Si：0.30~0.40%, Mn：0.65
~0.85%, P≤0.010%, S≤0.005%, Al：0.30~0.50%, Cr：2.15~2.35%, Mo：0.35~0.50%, Cu≤
0.20%, Ni≤0.20%, surplus are Fe and inevitable impurity.
The maximum gauge of steel plate of the present invention is 75mm.
Steel plate yield strength >=250MPa of the present invention, tensile strength 400-590MPa, -20 DEG C of side knock work(>=
150J, hardness≤200HB, HIC examine equal flawless.
Present invention also offers a kind of corrosion-resistant production method with low-alloy high-strength steel plate, the production method includes smelting
Refining, continuous casting, heating, rolling and heat treatment step；The rolling process, using two-stage rolling mill practice；The heat treatment step,
Using quenching+tempering technique.
Heating process of the present invention, continuous casting billet are heated in continuous-type furnace, 1280 DEG C of maximum heating temperature,
1240~1260 DEG C of soaking temperature, bringing-up section and soaking zone total time >=11min/mm.
Rolling process of the present invention, using two-stage rolling mill practice；First stage is the austenite recrystallization stage, open rolling
Temperature is 1050~1100 DEG C, and finishing temperature is 920~950 DEG C；Single pass rolling reduction is 10~30%, and it is 30 to add up reduction ratio
~50%；Dry in the air steel thickness >=1.5 times finished steel plate thickness of slab.
Rolling process of the present invention, using two-stage rolling mill practice；Second stage is the austenite non-recrystallization stage, is opened
860~910 DEG C of temperature is rolled, finishing temperature is 800~850 DEG C；Single pass rolling reduction is 10-30%, add up reduction ratio be 30~
50%, semi-finished product steel plate is obtained after rolling.
Heat treatment step of the present invention, using quenching+tempering technique；Hardening heat is 910~930 DEG C, heat insulating coefficient
2.5min/mm, thickness≤40mm steel plate roller speed are 10m/min, 40mm ＜ thickness≤70mm steel plate roller speed 5m/min, thickness
＞ 70mm steel plate roller speed 2m/min, water cooling accelerate cooling；Temperature is 750~760 DEG C, 4.0~4.5min/ of heat insulating coefficient
mm。
Continuous casting working procedure of the present invention, using continuous casting process, the molten steel after smelting is subjected to continuous casting, carries out electromagnetism during continuous casting
Stirring or slighter compress, reinforcement solidification end is cold by force, and casting speed control is 15~25 DEG C in 0.75~1.05m/min, the degree of superheat, to the greatest extent may be used
Continuous casting slab segregation can be reduced, steel billet wind sheltering stacking, temperature send steel rolling, clear temperature >=150 DEG C of temperature after slow cooling >=24h.
Smelting procedure of the present invention, molten steel first pass through just furnace smelt, be sent into LF refining furnace refining, using increase the quantity of slag and
Repeatedly stream slag, in favor of taking off P, bull ladle VD stove applications of vacuum during big bag temperature >=1580 DEG C, fed into molten steel in refining process
3~5kg/t of aluminum steel molten steel and Si-Ca line 1.5-2.5kg/t molten steel, vacuum≤66Pa during application of vacuum, vacuum retention time
>=15min, solve the phenomenon that non-metallic inclusion content is higher in molten steel, ensure that the degree of purity of steel.
The mechanism of action of each chemical composition of steel plate of the present invention and content is：
C：Surrender of the carbon on steel, tensile strength, welding performance make a significant impact.Carbon can significantly improve steel plate by gap solid solution
Intensity, but carbon content is too high, can influence the welding performance and toughness of steel, the too low quenching degree for then reducing steel of carbon content again.
Si：Reducing agent and deoxidier are used as in steelmaking process, while Si can also play solution strengthening effect, but exceed
When 0.5%, the toughness of steel can be caused to decline, reduce the welding performance of steel.
Mn：Manganese cost is cheap, can increase the toughness, intensity and hardness of steel, improves the quenching degree of steel, improves the hot-working of steel
Performance；Manganese amount is too high, can weaken the resistance to corrosion of steel, reduces welding performance.
P、S：In general, p and ses are all harmful elements in steel, increase the fragility of steel.Phosphorus becomes welding performance
It is bad, plasticity is reduced, cold-bending property is degenerated；Sulphur reduces the ductility and toughness of steel, and crackle is caused in forging and rolling；Therefore
Should be tried one's best the content for reducing p and ses in steel.
Al：Aluminium is the deoxidier commonly used in steel.A small amount of aluminium is added in steel, can crystal grain thinning, improve impact flexibility.Aluminium is also
With inoxidizability and corrosion resistance, too high hot-working character, welding performance and the machinability for then influenceing steel.
Cr：In the range of low-alloy steel, there is very big invigoration effect to steel, improve intensity, hardness and wearability, reduce
The critical cooling rate of steel, improve the quenching degree of steel.
Mo：With stronger carbide Forming ability, the coarse grains of austenitizing can be prevented, while can also cause C
Curve moves to right, and reduces degree of supercooling, drastically increases quenching degree.But excessive molybdenum can damage the heat affecting formed during welding
The toughness in area, reduce the weldability of steel.Cr and Mo complex intensifyings can increase substantially the hydrogen sulfide corrosion resistance of steel plate simultaneously
Energy.
Mentality of designing of the present invention：
Design of Chemical Composition of the present invention uses C, Mn, Cr, Mo solution strengthening, steel plate had good tissue, mechanical property, resisted
H20-H2S-HCL performances and welding performance.The present invention mainly uses appropriate two-stage rolling mill practice, solves mill milling pressure
Deficiency and caused by coarse grains are uneven, have excellent combination property, higher intensity rank sulfuration resistant can be better met
The requirement of hydrogen-type corrosion performance, -20 DEG C of impact flexibility are excellent, and steel plate elongation percentage has sizable surplus in addition, can be widely used for
Pressure vessel industries, have a extensive future；Using raising Molten Steel Cleanliness, reduce sulfur content, progress Ca processing, optimization continuous casting billet
Heating and the measure such as rolling condition, pressure vessel can be better met with anti-H20-H2S-HCL corrodes and hydrogen sulfide corrosion resistant
With the requirement of steel.
The present invention is corrosion-resistant to refer to GB2975 with low-alloy high-strength steel plate method for testing performance.
It is using beneficial effect caused by above-mentioned technical proposal：1st, the present invention uses C, Mn, Cr, Mo solution strengthening,
Steel plate has consistency high, and intensity rank is higher, and -20 DEG C of low-temperature impact toughness are excellent, and hardness is moderate and hydrogen sulfide corrosion resistance
Can be excellent the features such as, the requirement of pressure vessel hydrogen sulfide corrosion resistant steel is disclosure satisfy that, there is good combination property and welding
Performance.2nd, high strength steel plate yield strength >=250MPa of the present invention, tensile strength 400-590MPa, -20 DEG C of side knock work(>=
150J, hardness≤200HB, HIC examine equal flawless.3rd, steel plate steel of the present invention is purer, P≤0.010%, S≤0.005%,
Moderate strength, -20 DEG C of low-temperature good toughness.4th, steel plate maximum gauge can reach 75mm, and hydrogen sulfide corrosion resistance can be excellent.5th, originally
Invention steel plate disclosure satisfy that three phase separator in oil field gathering and transportation device, gas-liquid separator, Crude oil heater Atmospheric vacuum, catalysis and again
The equipment such as engagement positions and high-pressure oil gas separator and heating furnace is to H20-H2It is corrosion-resistant under S-HCL environment to use low-alloy high-strength steel
Requirement.
Brief description of the drawings
Fig. 1 is the steel plate HIC test effect figures of embodiment 1；
Fig. 2 is the steel plate HIC test effect figures of embodiment 2；
Fig. 3 is the steel plate HIC test effect figures of embodiment 3；
Fig. 4 is the steel plate HIC test effect figures of embodiment 4；
Fig. 5 is the steel plate HIC test effect figures of embodiment 5；
Fig. 6 is the steel plate HIC test effect figures of embodiment 6；
Fig. 7 is the steel plate HIC test effect figures of embodiment 7；
Fig. 8 is the steel plate HIC test effect figures of embodiment 8.
Embodiment
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings.
H20-H2The corrosion-resistant production method with low-alloy high-strength steel plate includes smelting, continuous casting, heats, rolls under S-HCL environment
System and heat treatment step, concrete technology step are as described below：
（1）Smelting procedure：Molten steel first passes through first furnace smelting, feeding LF refining furnace refining, flows slag with multiple using the increase quantity of slag, with
Beneficial to de- P, bull ladle VD stove applications of vacuum during big bag temperature >=1580 DEG C, 3~5kg/t of aluminum steel is fed into molten steel in refining process
Molten steel and Si-Ca line 1.5-2.5kg/t molten steel, vacuum≤66Pa during application of vacuum, vacuum retention time >=15min；
（2）Continuous casting working procedure：Molten steel after smelting is subjected to continuous casting, electromagnetic agitation or slighter compress are carried out during continuous casting, strengthens solidification end
End is strong cold, and casting speed control is in 0.75~1.05 m/min, 15~25 DEG C of the degree of superheat, steel billet wind sheltering stacking, temperature after slow cooling >=24h
Send steel rolling, clear temperature >=150 DEG C of temperature；
（3）Heating process：Continuous casting billet is heated in continuous-type furnace, 1280 DEG C of maximum heating temperature, soaking temperature
1240~1260 DEG C, bringing-up section and soaking zone total time >=11min/mm；
（4）Rolling process：Using two-stage rolling mill practice；First stage is the austenite recrystallization stage, start rolling temperature 1050
~1100 DEG C, finishing temperature is 920~950 DEG C, and single pass rolling reduction is 10~30%, and it is 30~50% to add up reduction ratio；Dry in the air steel
Thickness >=1.5 times finished steel plate thickness of slab；Second stage is the austenite non-recrystallization stage, 860~910 DEG C of start rolling temperature, finish to gauge
Temperature is 800~850 DEG C, and single pass rolling reduction is 10~30%, and it is 30~50% to add up reduction ratio, and rerolled steel is obtained after rolling
Plate.
（5）Heat treatment step：Steel plate semi-finished product are heat-treated, using quenching+tempering technique；Hardening heat is 910
~930 DEG C, heat insulating coefficient 2.5min/mm, thickness≤40mm of steel plate roller speed 10m/min, 40mm ＜ thickness≤70mm steel plate
Roller speed 5m/min, thickness G T.GT.GT 70mm steel plate roller speed 2m/min, maximum amount of water water cooling accelerate cooling；Temperature is 750~760
DEG C, 4.0~4.5min/mm of heat insulating coefficient.
Embodiment 1
Corrosion-resistant the present embodiment with low-alloy high-strength steel plate thickness is 75mm, and its chemical composition composition and weight/mass percentage composition are：
C：0.08%, Si：0.40%, Mn：0.70%, P：0.010%, S：0.003%, Al：0.40%, Cr：2.25%, Mo：0.43%, Cu：
0.01%, Ni：0.01%, surplus is Fe and inevitable impurity.
The corrosion-resistant production method with low-alloy high-strength steel plate of the present embodiment is included at smelting, continuous casting, heating, rolling and heat
Science and engineering sequence, concrete technology step are as described below：
（1）Smelting procedure：Molten steel first passes through just furnace and smelted, and is sent into LF refining furnace refining, using the quantity of slag and repeatedly stream slag is increased, greatly
Bull ladle VD stove applications of vacuum during 1590 DEG C of bag temperature, aluminum steel 3.5kg/t molten steel and Si-Ca lines are fed into molten steel in refining process
2kg/t molten steel, vacuum 66Pa, vacuum retention time 25min during application of vacuum；
（2）Continuous casting working procedure：Using continuous casting process, the molten steel after smelting is subjected to continuous casting, carries out electromagnetic agitation or light pressure during continuous casting
Under, casting speed control is in 0.95m/min, 23 DEG C of the degree of superheat, steel billet wind sheltering stacking, and temperature send steel rolling, 160 DEG C of band temperature after slow cooling 24h
Cleaning；
（3）Heating process：Continuous casting billet is heated in continuous-type furnace, 1280 DEG C of maximum heating temperature, soaking temperature
1250 DEG C, total heat time is 11min/mm；
（4）Rolling process：First stage rolls start rolling temperature for 1050 DEG C, and finishing temperature is 920 DEG C, and single pass rolling reduction is
10%, add up reduction ratio 40%；The steel thickness that dries in the air is 150mm；The start rolling temperature of second stage is 880 DEG C, and finishing temperature is 820 DEG C,
Single pass rolling reduction is 12%, and it is 45% to add up reduction ratio；
（5）Heat treatment step：Using quenching+tempering technique, the cooling medium of quenching is water, and hardening heat is 920 DEG C, insulation
Coefficient 2.5min/mm, roller speed 2m/min, maximum amount of water water cooling accelerate cooling, and temperature is 755 DEG C, heat insulating coefficient 4.5min/
mm。
Corrosion-resistant mechanical property and hydrogen sulfide corrosion resistance energy with low-alloy high-strength steel plate obtained by the present embodiment：Surrender is strong
Spend 375MPa, tensile strength 515MPa, -20 DEG C of side knock work(average 230J, hardness 160HB；HIC assays see the table below 1,
Detection results figure is shown in Fig. 1.
The steel plate HIC assays of 1 embodiment of table 1
Embodiment 2
Corrosion-resistant the present embodiment with low-alloy high-strength steel plate thickness is 65mm, and its chemical composition composition and weight/mass percentage composition are：
C：0.08%, Si：0.33%, Mn：0.73%, P：0.010%, S：0.003%, Al：0.41%, Cr：2.26%, Mo：0.41%, Cu：
0.01%, Ni：0.01%, surplus is Fe and inevitable impurity.
The corrosion-resistant production method with low-alloy high-strength steel plate of the present embodiment is included at smelting, continuous casting, heating, rolling and heat
Science and engineering sequence, concrete technology step are as described below：
（1）Smelting procedure：Molten steel first passes through just furnace and smelted, and is sent into LF refining furnace refining, using the quantity of slag and repeatedly stream slag is increased, greatly
Bull ladle VD stove applications of vacuum during 1585 DEG C of bag temperature, aluminum steel 3.0kg/t molten steel and Si-Ca lines are fed into molten steel in refining process
1.8kg/t molten steel, vacuum 65Pa, vacuum retention time 25min during application of vacuum；
（2）Continuous casting working procedure：Using continuous casting process, the molten steel after smelting is subjected to continuous casting, carries out electromagnetic agitation or light pressure during continuous casting
Under, casting speed control is in 0.95m/min, 23 DEG C of the degree of superheat, steel billet wind sheltering stacking, and temperature send steel rolling, 165 DEG C of band temperature after slow cooling 24h
Cleaning；
（3）Heating process：Continuous casting billet is heated in continuous-type furnace, 1280 DEG C of maximum heating temperature, soaking temperature
1255 DEG C, total heat time is 11min/mm；
（4）Rolling process：First stage rolls start rolling temperature for 1050 DEG C, and finishing temperature is 925 DEG C, and single pass rolling reduction is
10%, add up reduction ratio 40%；The steel thickness that dries in the air is 140mm；The start rolling temperature of second stage is 890 DEG C, and finishing temperature is 830 DEG C,
Single pass rolling reduction is 12%, and it is 45% to add up reduction ratio；
（5）Heat treatment step：Using quenching+tempering technique, the cooling medium of quenching is water, and hardening heat is 920 DEG C, insulation
Coefficient 2.5min/mm, roller speed 5m/min, maximum amount of water water cooling accelerate cooling, and temperature is 755 DEG C, heat insulating coefficient 4.5min/
mm。
Corrosion-resistant mechanical property and hydrogen sulfide corrosion resistance energy with low-alloy high-strength steel plate obtained by the present embodiment：Surrender is strong
Spend 380MPa, tensile strength 525MPa, -20 DEG C of side knock work(average 180J, hardness 145HB；HIC assays see the table below 2,
Detection results figure is shown in Fig. 2.
The steel plate HIC assays of 2 embodiment of table 2
Embodiment 3
Corrosion-resistant the present embodiment with low-alloy high-strength steel plate thickness is 30mm, and its chemical composition composition and weight/mass percentage composition are：
C：0.07%, Si：0.38%, Mn：0.75%, P：0.010%, S：0.003%, Al：0.40%, Cr：2.20%, Mo：0.43%, Cu：
0.01%, Ni：0.01%, surplus is Fe and inevitable impurity.
The corrosion-resistant production method with low-alloy high-strength steel plate of the present embodiment is included at smelting, continuous casting, heating, rolling and heat
Science and engineering sequence, concrete technology step are as described below：
（1）Smelting procedure：Molten steel first passes through just furnace and smelted, and is sent into LF refining furnace refining, using the quantity of slag and repeatedly stream slag is increased, greatly
Bull ladle VD stove applications of vacuum during 1600 DEG C of bag temperature, aluminum steel 3.5kg/t molten steel and Si-Ca lines are fed into molten steel in refining process
1.6kg/t molten steel, vacuum 65Pa, vacuum retention time 25min during application of vacuum；
（2）Continuous casting working procedure：Using continuous casting process, the molten steel after smelting is subjected to continuous casting, carries out electromagnetic agitation or light pressure during continuous casting
Under, casting speed control is in 0.95m/min, 20 DEG C of the degree of superheat, steel billet wind sheltering stacking, and temperature send steel rolling, 170 DEG C of band temperature after slow cooling 24h
Cleaning；
（3）Heating process：Continuous casting billet is heated in continuous-type furnace, 1280 DEG C of maximum heating temperature, soaking temperature
1250 DEG C, total heat time is 11min/mm；
（4）Rolling process：First stage rolls start rolling temperature for 1050 DEG C, and finishing temperature is 925 DEG C, and single pass rolling reduction is
10%, it is 40% to add up reduction ratio；The steel thickness that dries in the air is 100mm；The start rolling temperature of second stage is 900 DEG C, finishing temperature 835
DEG C, single pass rolling reduction 12%, it is 45% to add up reduction ratio；
（5）Heat treatment step：Using quenching+tempering technique, the cooling medium of quenching is water, and hardening heat is 920 DEG C, insulation
Coefficient 2.5min/mm, roller speed 10m/min, maximum amount of water water cooling accelerate cooling, and temperature is 755 DEG C, heat insulating coefficient
4.5min/mm。
Corrosion-resistant mechanical property and hydrogen sulfide corrosion resistance energy with low-alloy high-strength steel plate obtained by the present embodiment：Surrender is strong
Spend 489MPa, tensile strength 555MPa, -20 DEG C of side knock work(average 260J, hardness 170HB；HIC assays see the table below 3,
Detection results figure is shown in Fig. 3.
The steel plate HIC assays of 3 embodiment of table 3
Embodiment 4
Corrosion-resistant the present embodiment with low-alloy high-strength steel plate thickness is 16mm, and its chemical composition composition and weight/mass percentage composition are：
C：0.07%, Si：0.32%, Mn：0.75%, P：0.010%, S：0.003%, Al：0.40%, Cr：2.20%, Mo：0.42%, Cu：
0.01%, Ni：0.01%, surplus is Fe and inevitable impurity.
The corrosion-resistant production method with low-alloy high-strength steel plate of the present embodiment is included at smelting, continuous casting, heating, rolling and heat
Science and engineering sequence, concrete technology step are as described below：
（1）Smelting procedure：Molten steel first passes through just furnace and smelted, and is sent into LF refining furnace refining, using the quantity of slag and repeatedly stream slag is increased, greatly
Bull ladle VD stove applications of vacuum during 1610 DEG C of bag temperature, aluminum steel 3.0kg/t molten steel and Si-Ca lines are fed into molten steel in refining process
2.0kg/t molten steel, vacuum 65Pa, vacuum retention time 25min during application of vacuum；
（2）Continuous casting working procedure：Using continuous casting process, the molten steel after smelting is subjected to continuous casting, carries out electromagnetic agitation or light pressure during continuous casting
Under, casting speed control is in 0.95m/min, 19 DEG C of the degree of superheat, steel billet wind sheltering stacking, and temperature send steel rolling, 165 DEG C of band temperature after slow cooling 24h
Cleaning；
（3）Heating process：Continuous casting billet is heated in continuous-type furnace, 1280 DEG C of maximum heating temperature, soaking temperature
1250 DEG C, total heat time is 11min/mm；
（4）Rolling process：First stage rolls start rolling temperature for 1050 DEG C, and finishing temperature is 920 DEG C, and single pass rolling reduction is
10%, it is 40% to add up reduction ratio；The steel thickness that dries in the air is 100mm；The start rolling temperature of second stage is 900 DEG C, finishing temperature 830
DEG C, single pass rolling reduction 12%, it is 45% to add up reduction ratio；
（5）Heat treatment step：Using quenching+tempering technique, the cooling medium of quenching is water, and hardening heat is 910 DEG C, insulation
Coefficient 2.5min/mm, roller speed 10m/min, maximum amount of water water cooling accelerate cooling, and temperature is 750 DEG C, heat insulating coefficient
4.0min/mm。
Corrosion-resistant mechanical property and hydrogen sulfide corrosion resistance energy with low-alloy high-strength steel plate obtained by the present embodiment：Surrender is strong
Spend 435MPa, tensile strength 545MPa, -20 DEG C of side knock work(average 260J, hardness 153HB；HIC assays see the table below 4,
Detection results figure is shown in Fig. 4.
The steel plate HIC assays of 4 embodiment of table 4
Embodiment 5
Corrosion-resistant the present embodiment with low-alloy high-strength steel plate thickness is 55mm, and its chemical composition composition and weight/mass percentage composition are：
C：0.08%, Si：0.35%, Mn：0.75%, P：0.010%, S：0.003%, Al：0.40%, Cr：2.25%, Mo：0.43%, Cu：
0.01%, Ni：0.01%, surplus is Fe and inevitable impurity.
The corrosion-resistant production method with low-alloy high-strength steel plate of the present embodiment is included at smelting, continuous casting, heating, rolling and heat
Science and engineering sequence, concrete technology step are as described below：
（1）Smelting procedure：Molten steel first passes through just furnace and smelted, and is sent into LF refining furnace refining, using the quantity of slag and repeatedly stream slag is increased, greatly
Bull ladle VD stove applications of vacuum during 1605 DEG C of bag temperature, aluminum steel 5.0kg/t molten steel and Si-Ca lines are fed into molten steel in refining process
1.8kg/t molten steel, vacuum 64Pa, vacuum retention time 15min during application of vacuum；
（2）Continuous casting working procedure：Using continuous casting process, the molten steel after smelting is subjected to continuous casting, carries out electromagnetic agitation or light pressure during continuous casting
Under, casting speed control is in 0.75m/min, 15 DEG C of the degree of superheat, steel billet wind sheltering stacking, and temperature send steel rolling, 150 DEG C of band temperature after slow cooling 26h
Cleaning；
（3）Heating process：Continuous casting billet is heated in continuous-type furnace, 1280 DEG C of maximum heating temperature, soaking temperature
1260 DEG C, total heat time is 11.5min/mm；
（4）Rolling process：First stage rolls start rolling temperature for 1100 DEG C, and finishing temperature is 950 DEG C, and single pass rolling reduction is
18%, it is 30% to add up reduction ratio；The steel thickness that dries in the air is 130mm；The start rolling temperature of second stage is 910 DEG C, finishing temperature 850
DEG C, single pass rolling reduction 20%, it is 50% to add up reduction ratio；
（5）Heat treatment step：Using quenching+tempering technique, the cooling medium of quenching is water, and hardening heat is 910 DEG C, insulation
Coefficient 2.5min/mm, roller speed 5m/min, maximum amount of water water cooling accelerate cooling, and temperature is 750 DEG C, heat insulating coefficient 4.0min/
mm。
Corrosion-resistant mechanical property and hydrogen sulfide corrosion resistance energy with low-alloy high-strength steel plate obtained by the present embodiment：Surrender is strong
Spend 365MPa, tensile strength 525MPa, -20 DEG C of side knock work(average 180J, hardness 165HB；HIC assays see the table below 5,
Detection results figure is shown in Fig. 5.
The steel plate HIC assays of 5 embodiment of table 5
Embodiment 6
Corrosion-resistant the present embodiment with low-alloy high-strength steel plate thickness is 40mm, and its chemical composition composition and weight/mass percentage composition are：
C：0.08%, Si：0.36%, Mn：0.75%, P：0.010%, S：0.003%, Al：0.40%, Cr：2.19%, Mo：0.43%, Cu：
0.01%, Ni：0.01%, surplus is Fe and inevitable impurity.
The corrosion-resistant production method with low-alloy high-strength steel plate of the present embodiment is included at smelting, continuous casting, heating, rolling and heat
Science and engineering sequence, concrete technology step are as described below：
（1）Smelting procedure：Molten steel first passes through just furnace and smelted, and is sent into LF refining furnace refining, using the quantity of slag and repeatedly stream slag is increased, greatly
Bull ladle VD stove applications of vacuum during 1580 DEG C of bag temperature, aluminum steel 4.0kg/t molten steel and Si-Ca lines are fed into molten steel in refining process
1.6kg/t molten steel, vacuum 63Pa, vacuum retention time 22min during application of vacuum；
（2）Continuous casting working procedure：Using continuous casting process, the molten steel after smelting is subjected to continuous casting, carries out electromagnetic agitation or light pressure during continuous casting
Under, casting speed control is in 1.05m/min, 25 DEG C of the degree of superheat, steel billet wind sheltering stacking, and temperature send steel rolling, 160 DEG C of band temperature after slow cooling 28h
Cleaning；
（3）Heating process：Continuous casting billet is heated in continuous-type furnace, 1280 DEG C of maximum heating temperature, soaking temperature
1240 DEG C, total heat time is 12min/mm；
（4）Rolling process：First stage rolls start rolling temperature for 1080 DEG C, and finishing temperature is 940 DEG C, and single pass rolling reduction is
30%, it is 50% to add up reduction ratio；The steel thickness that dries in the air is 110mm；The start rolling temperature of second stage is 860 DEG C, finishing temperature 800
DEG C, single pass rolling reduction 20%, it is 30% to add up reduction ratio；
（5）Heat treatment step：Using quenching+tempering technique, the cooling medium of quenching is water, and hardening heat is 930 DEG C, insulation
Coefficient 2.5min/mm, roller speed 10m/min, maximum amount of water water cooling accelerate cooling, and temperature is 760 DEG C, heat insulating coefficient
4.2min/mm。
Corrosion-resistant mechanical property and hydrogen sulfide corrosion resistance energy with low-alloy high-strength steel plate obtained by the present embodiment：Surrender is strong
Spend 360MPa, tensile strength 525MPa, -20 DEG C of side knock work(average 170J, hardness 148HB；HIC assays see the table below 6,
Detection results figure is shown in Fig. 6.
The steel plate HIC assays of 6 embodiment of table 6
Embodiment 7
Corrosion-resistant the present embodiment with low-alloy high-strength steel plate thickness is 20mm, and its chemical composition composition and weight/mass percentage composition are：
C：0.07%, Si：0.30%, Mn：0.65%, P：0.005%, S：0.005%, Al：0.30%, Cr：2.15%, Mo：0.35%, Cu：
0.20%, Ni：0.20%, surplus is Fe and inevitable impurity.
The corrosion-resistant production method with low-alloy high-strength steel plate of the present embodiment is included at smelting, continuous casting, heating, rolling and heat
Science and engineering sequence, concrete technology step are as described below：
（1）Smelting procedure：Molten steel first passes through just furnace and smelted, and is sent into LF refining furnace refining, using the quantity of slag and repeatedly stream slag is increased, greatly
Bull ladle VD stove applications of vacuum during 1585 DEG C of bag temperature, aluminum steel 4.5kg/t molten steel and Si-Ca lines are fed into molten steel in refining process
2.5kg/t molten steel, vacuum 65Pa, vacuum retention time 18min during application of vacuum；
（2）Continuous casting working procedure：Using continuous casting process, the molten steel after smelting is subjected to continuous casting, carries out electromagnetic agitation or light pressure during continuous casting
Under, casting speed control is in 1.00m/min, 23 DEG C of the degree of superheat, steel billet wind sheltering stacking, and temperature send steel rolling, 160 DEG C of band temperature after slow cooling 24h
Cleaning；
（3）Heating process：Continuous casting billet is heated in continuous-type furnace, 1280 DEG C of maximum heating temperature, soaking temperature
1245 DEG C, total heat time is 11min/mm；
（4）Rolling process：First stage rolls start rolling temperature for 1080 DEG C, and finishing temperature is 930 DEG C, and single pass rolling reduction is
15%, it is 35% to add up reduction ratio；The steel thickness that dries in the air is 30mm；The start rolling temperature of second stage is 900 DEG C, and finishing temperature is 850 DEG C,
Single pass rolling reduction is 10%, and it is 36% to add up reduction ratio；
（5）Heat treatment step：Using quenching+tempering technique, the cooling medium of quenching is water, and hardening heat is 915 DEG C, insulation
Coefficient 2.5min/mm, roller speed 10m/min, maximum amount of water water cooling accelerate cooling, and temperature is 755 DEG C, heat insulating coefficient
4.5min/mm。
Corrosion-resistant mechanical property and hydrogen sulfide corrosion resistance energy with low-alloy high-strength steel plate obtained by the present embodiment：Surrender is strong
Spend 370MPa, tensile strength 555MPa, -20 DEG C of side knock work(average 185J, hardness 162HB；HIC assays see the table below 7,
Detection results figure is shown in Fig. 7.
The steel plate HIC assays of 7 embodiment of table 7
Embodiment 8
Corrosion-resistant the present embodiment with low-alloy high-strength steel plate thickness is 8mm, and its chemical composition composition and weight/mass percentage composition are：C：
0.10%, Si：0.40%, Mn：0.85%, P：0.008%, S：0.002%, Al：0.50%, Cr：2.35%, Mo：0.50%, Cu：
0.10%, Ni：0.11%, surplus is Fe and inevitable impurity.
The corrosion-resistant production method with low-alloy high-strength steel plate of the present embodiment is included at smelting, continuous casting, heating, rolling and heat
Science and engineering sequence, concrete technology step are as described below：
（1）Smelting procedure：Molten steel first passes through just furnace and smelted, and is sent into LF refining furnace refining, using the quantity of slag and repeatedly stream slag is increased, greatly
Bull ladle VD stove applications of vacuum during 1600 DEG C of bag temperature, aluminum steel 4.5kg/t molten steel and Si-Ca lines are fed into molten steel in refining process
1.5kg/t molten steel, vacuum 55Pa, vacuum retention time 18min during application of vacuum；
（2）Continuous casting working procedure：Using continuous casting process, the molten steel after smelting is subjected to continuous casting, carries out electromagnetic agitation or light pressure during continuous casting
Under, casting speed control is in 1.05m/min, 23 DEG C of the degree of superheat, steel billet wind sheltering stacking, and temperature send steel rolling, 150 DEG C of band temperature after slow cooling 24h
Cleaning；
（3）Heating process：Continuous casting billet is heated in continuous-type furnace, 1280 DEG C of maximum heating temperature, soaking temperature
1240 DEG C, total heat time is 11min/mm；
（4）Rolling process：First stage rolls start rolling temperature for 1070 DEG C, and finishing temperature is 945 DEG C, and single pass rolling reduction is
25%, it is 45% to add up reduction ratio；The steel thickness that dries in the air is 90mm；The start rolling temperature of second stage is 910 DEG C, and finishing temperature is 850 DEG C,
Single pass reduction ratio is 30%, and it is 48% to add up reduction ratio；
（5）Heat treatment step：Using quenching+tempering technique, the cooling medium of quenching is water, and hardening heat is 925 DEG C, insulation
Coefficient 2.5min/mm, roller speed 10m/min, maximum amount of water water cooling accelerate cooling, and temperature is 750 DEG C, heat insulating coefficient
4.4min/mm。
Corrosion-resistant mechanical property and hydrogen sulfide corrosion resistance energy with low-alloy high-strength steel plate obtained by the present embodiment：Surrender is strong
Spend 392MPa, tensile strength 565MPa, -20 DEG C of side knock work(average 175J, hardness 150HB；HIC assays see the table below 8,
Detection results figure is shown in Fig. 8.
The steel plate HIC assays of 8 embodiment of table 8
Above-mentioned result of the test shows, the steel plate produced using the method for the present invention have degree of purity is higher, composition uniformly, it is internal
The characteristics of fine and close, the metallurgy of steel is horizontal higher, and performance fully meets pressure vessel hydrogen sulphide-corrosion-resistant low alloy high strength steel plate
Requirement.
Above example is only to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (10)
1. a kind of corrosion-resistant low-alloy high-strength steel plate, it is characterised in that the chemical composition composition and its quality hundred of the steel plate
Point content is：C：0.07~0.10%, Si：0.30~0.40%, Mn：0.65~0.85%, P≤0.010%, S≤0.005%, Al：
0.30~0.50%, Cr：2.15~2.35%, Mo：0.35~0.50%, Cu≤0.20%, Ni≤0.20%, surplus are Fe and can not
The impurity avoided.
2. one kind according to claim 1 is corrosion-resistant to use low-alloy high-strength steel plate, it is characterised in that the maximum of the steel plate
Thickness is 75mm.
3. one kind according to claim 1 is corrosion-resistant to use low-alloy high-strength steel plate, it is characterised in that the steel plate surrender is strong
Degree >=250MPa, tensile strength 400-590MPa, -20 DEG C of side knock work(>=150J, hardness≤200HB, HIC are examined without splitting
Line.
4. based on a kind of corrosion-resistant production method with low-alloy high-strength steel plate described in claim 1-3 any one, it is special
Sign is that the production method includes smelting, continuous casting, heating, rolling and heat treatment step；The rolling process, using second order
Section rolling mill practice；The heat treatment step, using quenching+tempering technique.
5. a kind of corrosion-resistant production method with low-alloy high-strength steel plate according to claim 4, it is characterised in that described
Heating process, 1280 DEG C of continuous casting billet maximum heating temperature, 1240~1260 DEG C of soaking temperature, bringing-up section and soaking zone total time >=
11min/mm。
6. a kind of corrosion-resistant production method with low-alloy high-strength steel plate according to claim 4, it is characterised in that described
Rolling process, using two-stage rolling mill practice；First stage is the austenite recrystallization stage, and start rolling temperature is 1050~1100
DEG C, finishing temperature is 920~950 DEG C；Single pass rolling reduction is 10~30%, and it is 30~50% to add up reduction ratio；Dry in the air steel thickness >=
1.5 times of finished steel plate thicknesss of slab.
7. a kind of corrosion-resistant production method with low-alloy high-strength steel plate according to claim 4, it is characterised in that described
Rolling process, using two-stage rolling mill practice；Second stage is the austenite non-recrystallization stage, 860~910 DEG C of start rolling temperature,
Finishing temperature is 800~850 DEG C；Single pass rolling reduction is 10-30%, and it is 30~50% to add up reduction ratio, obtained after rolling half into
Product steel plate.
8. a kind of corrosion-resistant production method with low-alloy high-strength steel plate according to claim 4-7 any one, it is special
Sign is, the heat treatment step, using quenching+tempering technique；Hardening heat is 910~930 DEG C, heat insulating coefficient 2.5min/
Mm, thickness≤40mm steel plate roller speed are 10m/min, 40mm ＜ thickness≤70mm steel plate roller speed 5m/min, thickness G T.GT.GT 70mm
Steel plate roller speed 2m/min, water cooling accelerate cooling；Temperature is 750~760 DEG C, 4.0~4.5min/mm of heat insulating coefficient.
9. a kind of corrosion-resistant production method with low-alloy high-strength steel plate according to claim 4-7 any one, it is special
Sign is that the continuous casting working procedure, the molten steel after smelting is cast to obtain continuous casting billet, and casting speed control is in 0.75~1.05 m/
Min, the degree of superheat are 15~25 DEG C, steel billet wind sheltering stacking, and temperature send steel rolling, clear temperature >=150 DEG C of temperature after slow cooling >=24h.
10. a kind of corrosion-resistant production method with low-alloy high-strength steel plate according to claim 4-7 any one, it is special
Sign is, the smelting procedure, and molten steel first passes through just furnace and smelted, and is sent into LF refining furnace refining, hangs during big bag temperature >=1580 DEG C
VD stove applications of vacuum are wrapped, 3~5kg/t of aluminum steel molten steel and Si-Ca line 1.5-2.5kg/t steel are fed into molten steel in refining process
Water, vacuum≤66Pa during application of vacuum, vacuum retention time >=15min.
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