CN101054647A - Method of producing low-temperature high-toughness steel and steel plate - Google Patents
Method of producing low-temperature high-toughness steel and steel plate Download PDFInfo
- Publication number
- CN101054647A CN101054647A CN 200710062013 CN200710062013A CN101054647A CN 101054647 A CN101054647 A CN 101054647A CN 200710062013 CN200710062013 CN 200710062013 CN 200710062013 A CN200710062013 A CN 200710062013A CN 101054647 A CN101054647 A CN 101054647A
- Authority
- CN
- China
- Prior art keywords
- steel
- iron
- molten iron
- molten
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
A process for producing a steel having high ductility at low temperature and its steel plates comprises the following steps in sequence: (1) loading molten iron into a revolving furnace, wherein said molten iron is raw material and all suffers a molten iron preliminary treatment; (2) top and bottom blowing revolving furnace smelting; (3) refining IVOD (VD) working procedure, wherein the components of the molten steel from the station in the IILF furnace working procedure are as follows (based on weight): C; <=0.06%; Si: 0.01%-0.40%; Mn: 0.20%-0.90%; P: <=0.004%; S; <=0.002%; Ni: 8.50%-10.00%; Mo: <=0.5%; V: <=0.5%; the rest is iron and unavoidable impurities; (4) continuous casting bar plate or die casting and billet-opening the casting ingots; (5)roller milling and heat treating the bar plate into O6Ni9 steel and steel plates.Said O6Ni9 steel prepared through the process for producing a steel having high ductility at low temperature, after a roller milling and heat treating, exhibits an excellent impelling strength, which Akv mean value reaches 220-280J at lateral direction at -196 DEG C low temperature condition.
Description
Technical field
The present invention relates to a kind of method of producing low-temperature high-toughness steel and steel plate thereof, specifically is the method for producing the method for 06Ni9 (9%Ni) low-temperature high-toughness steel and 06Ni9 (9%Ni) steel plate thereof.
Technical background
Because the increase of energy demand and to an urgent demand of environmental protection, demand to Sweet natural gas sharply increases in the world, Korea S, Japan and other countries have been built many Large LNG storage tanks, the domestic in recent years construction of also actively pushing forward the LNG storage tank is built the required 06Ni9 of these storage tanks (9%Ni) rolled steel dosage and is also rolled up thereupon.
In order to guarantee the security of cryogenic liquid storage tank such as LNG, liquid argon, liquid nitrogen, require its crucial manufactured materials 06Ni9 (9%Ni) to have superperformance, as require steel under-196 ℃ of low temperature conditions, to have good obdurability coupling, and the cold formability of steel, weldability and resistance of crack propagation etc. are good, and wherein the low-temperature flexibility of steel is the key technical index that guarantees low-temperature pressure container safety.
06Ni9 (9%Ni) steel is the minimum a kind of low-temperature steel of present use temperature, is structure design manufacturing and investigation of materials worker common target so obtain high low-temperature flexibility.Everybody mainly paid close attention to 06Ni9 (9%Ni) if contain higher phosphorus, element sulphur content in the steel in the past, it is poly-partially to produce crystal boundary, the low-temperature flexibility of infringement steel, and ignored the influence of As, Sn beyond P, the S element, Sb, Bi, low melting point elements such as Pb, Zn to low-temperature flexibility.Show through a large amount of tests, 06Ni9 (9%Ni) is if contain low melting point elements such as higher As, Sn, Sb, Bi, Pb, Zn in the steel, this steel plate is after thermal treatment, these low melting point elements will gather on the crystal boundary of steel inevitably partially, thereby cause the low-temperature flexibility value of steel plate to descend significantly.Existing method of producing low-temperature high-toughness 06Ni9 steel, step is converter smelting → refining → casting, pack into converter raw material all part adopt steel scrap, steel scrap can be brought low melting point elements such as some As, Sn, Sb, Bi, Pb, Zn into, can not be removed in the concise operation of these elements after converter smelting reaches, obviously reduced the low-temperature impact toughness after the thermal treatment of 06Ni9 (9%Ni) steel plate, when from getting impact specimen perpendicular to the steel plate rolling direction, carry out shock test under-196 ℃, low-temperature impact work is lower than 220J.
Summary of the invention
In order to overcome existing above-mentioned deficiency of producing the method for low-temperature high-toughness 06Ni9 steel and steel plate thereof, the invention provides a kind of method of producing the low-temperature high-toughness steel, the low-temperature impact work that the 06Ni9 steel that this method is produced rolls into steel plate provides the method for low-temperature impact work greater than the 06Ni9 steel plate of 220J of producing simultaneously greater than 220J.
The full molten iron of this usefulness is that the method and technology scheme of raw material production low-temperature high-toughness 06Ni9 steel is:
When adopting converter smelting → refining → casting process to smelt 06Ni9 (9%Ni) steel, the raw material of the converter of packing into does not adopt steel scrap, is (weight) but all adopt composition:
C：≤4.5％ P：≤0.05％ S：≤0.07％
Other are the blast-melted of iron and unavoidable impurities for Si:0.45%～0.75%, and molten iron should pass through pre-treatment, and the content of the phosphorus of (weight) and sulphur is reduced in the preprocessed molten iron:
P：≤0.008％ S：≤0.008％ Si：≤0.4％。
Because of molten iron be by iron ore through blast-furnace smelting production, compare steel scrap, have low low melting point element content, so in the molten steel after refining and the low melting point element content of final steel plate reach following level,
As＜10ppm Sb＜10ppm Bi＜0.5ppm Sn＜10ppm
Pb＜10ppm Zn＜10ppm。
The above-mentioned slab that is cast into again after rolling and thermal treatment, is promptly made low-temperature high-toughness steel plate of the present invention.
Concretely, the operational path of the method for this production low-temperature high-toughness steel employing is:
Molten iron gives processing → K-OBM-S converter → vacuum-treat → LF → continuous casting (or die casting+ingot casting cogging).
The method of this production low-temperature high-toughness steel comprises following steps in order:
(1) hot metal pretreatment
Blast-melted by iron ore through blast-furnace smelting production, with chemical ingredients (weight) be:
C：≤4.5％ P：≤0.05％ S：≤0.07％
Other are the molten iron of iron and unavoidable impurities for Si:0.45%～0.7%, and through after the common hot metal pretreatment, the content of the phosphorus of (weight) and sulphur is reduced in the molten iron:
P：≤0.008％ S：≤0.008％ Si：≤0.4％
Pretreated molten iron is not less than 1230 ℃, the top and bottom combined blown converter of packing into;
(2) top and bottom combined blown converter smelting
The converter top can blow into oxygen and be used for decarburization, and the bottom is blown into rare gas element-argon gas, and is even to accelerate decarbonization rate and molten steel.To pour in the top and bottom combined blown converter through pretreated molten iron, add the nickel plate afterwards.Oxygen decarburization, intensification.Smelt later stage reduction tapping, temperature is 1620 ℃-1660 ℃ behind the stove.
The chemical ingredients of molten steel (weight) is behind the converter smelting:
C：≤0.06％ Si：0.01％～0.40％ Mn：0.20％～0.90％
P：≤0.003％ S：≤0.006％ Ni：8.50％～10.00％
Mo :≤0.5% V :≤0.5% all the other be iron and unavoidable impurities
(3) refining
I VOD (VD) operation
With overhead traveling crane ladle is put in the VOD tank car, drives tank car to handling the position.Arrive at a station 1600 ℃-1660 ℃ of liquid steel temperatures, (general＜4mbar) strong mixing down, churning time is greater than 20min, and desulfurization vacuumizes to remove and is mingled with the degassing in final vacuum.
After VOD handled, the chemical ingredients of molten steel (weight) was:
C：≤0.06％ Si：0.01％～0.40％ Mn：0.20％～0.90％
P：≤0.003％ S：≤0.003％ Ni：8.50％～10.00％
Mo :≤0.5% V :≤0.5% all the other be iron and unavoidable impurities.
II furnaceman LF preface
According to the VOD composition, mend and feed Al, adjust temperature and other alloying constituent according to measuring temperature and composition situation immediately after the silicon-calcium wire line, weak churning time 〉=15min forbids molten steel exposed.Out-station temperature: 1560 ℃-1590 ℃.Departures molten steel compositions (weight) are
C：≤0.06％ Si：0.01％～0.40％ Mn：0.20％～0.90％
P：≤0.003％ S：≤0.002％ Ni：8.50％～10.00％
Mo :≤0.5% V :≤0.5% all the other be iron and unavoidable impurities;
Low melting point element content in the molten steel after refining reaches following level,
As＜10ppm Sb＜10ppm Bi＜0.5ppm Sn＜10ppm
Pb＜10ppm Zn＜10ppm。
Also can adopt the refinery practice of LF → VOD (VD), LF → RH, RH → LF for the concise operation of composition that reaches 06Ni9 (9%Ni) steel, wherein the effect of LF is desulfurization, the effect of VOD, VD, RH is then for accurately adjusting composition, decarburization, removal is mingled with and gas, adjusts temperature, if different refinery practices adopts specific technology controlling and process, all can satisfy accurate alloying constituent control requirement.
(4) continuous casting steel billet
Slab during molten steel becomes by continuous casting perhaps is molded into steel ingot, again steel ingot is split into middle slab by breaking down.The middle slab of the thick 115～170mm of slab, length＞1600mm, wide＞1500mm.
Follow above-mentioned step (four), the slab that above-mentioned continuous casting is become is rolled, thermal treatment, promptly makes low-temperature high-toughness steel plate of the present invention, the end product check.
(5) rolling, thermal treatment
I is the heating of slab material, 1150 ℃～1250 ℃ of Heating temperatures; II is when rolling process, and first roughing is rolled into the thick roughing steel plate of 80mm-135mm for 1050 ℃～1150 ℃, and finish rolling becomes the thick steel plate of 8mm-35mm again, and the rolling temperature of finish rolling is 800 ℃～900 ℃; In the III heat treatment step, the steel plate after the finish rolling system, be heated to more than the Ac3 point-880 ℃ in continuous six segmentation normalizing furnaces, be generally 740 ℃-880 ℃, insulation is more than 15 minutes; The IV water cooling is quenched; The V tempering is incubated more than 30 minutes for following 550 ℃-620 ℃ at the Ac1 point; VI and air cooling or greater than the speed of air cooling cooling tempering heat treatment are made low-temperature high-toughness steel plate of the present invention; Check the low-temperature impact toughness of finished product steel plate after the VII.
The method of the method for this production low-temperature high-toughness steel and this production low-temperature high-toughness steel plate also can be separated hot metal pre process procedures, in molten iron
P :≤0.008%, S :≤0.008% Si :≤0.4% preprocessed molten iron adds converter smelting, promptly from above-mentioned top and bottom combined blown converter smelting (two).
The method of this production low-temperature high-toughness steel is when adopting conventional converter smelting → refining → casting to smelt 06Ni9 (9%Ni) steel, the raw material of converter of packing into does not adopt steel scrap, but all adopt preprocessed molten iron, low melting point elements such as the As in the molten steel, Sn, Sb, Bi, Pb, Zn are few, 06Ni9 (9%Ni) steel rolling of smelting becomes steel plate after thermal treatment, has avoided these low melting point elements to gather partially on the crystal boundary of steel and the shortcoming that causes the low-temperature flexibility value of steel plate to descend significantly.06Ni9 (9%Ni) steel of smelting with the method for this production low-temperature high-toughness steel, compare with 06Ni9 (9%Ni) steel that existing ordinary method is smelted, after being rolled into steel plate thermal treatment, significantly improve the impelling strength of 06Ni9 steel plate under-196 ℃ of low temperature conditions, laterally-196 ℃ Akv mean value (J) reaches 220-280, and maximum can improve 27%.
The method of production low-temperature high-toughness 06Ni9 steel of the present invention and existing method of producing low-temperature high-toughness 06Ni9 steel with compare, two kinds of manufacture method relatively see Table 1 to the low-temperature flexibility impact effect of the steel plate after rolling, the thermal treatment:
Table 1
| Manufacture method | As ppm | Sb ppm | Bi ppm | Sn ppm | Pb ppm | Zn ppm | Horizontal-196 ℃ Akv mean value (J) |
| Existing production method | 25～35 | 8～15 | ＜0.5 | 8～15 | 8～15 | 25～35 | ＜220 |
| Production method of the present invention | ＜10 | ＜10 | ＜0.5 | ＜10 | ＜10 | ＜10 | ＞230 |
Embodiment
Describe the embodiment of the method for this production low-temperature high-toughness steel 06Ni9 and steel plate thereof in detail below in conjunction with embodiment, but the embodiment of the method for this production low-temperature high-toughness steel 06Ni9 and steel plate thereof is not limited to following embodiment.
Produce low-temperature high-toughness steel embodiment
Present embodiment carries out at hot metal pretreatment stove and 85 tons of top and bottom combined blown converters, and the operational path of employing is:
Molten iron gives processing → K-OBM-S converter → vacuum-treat → LF → continuous casting.
The steel grade of present embodiment production is 06Ni9 (9%Ni) steel, and its production technique is as follows:
(1) hot metal pretreatment
Blast-melted by iron ore through blast-furnace smelting production, with chemical ingredients (weight) be:
C：≤4.5％ P：≤0.05％ S：≤0.07％
Other are iron and unavoidable impurities for Si:0.45%～0.75%
69 tons of molten iron, through after the common hot metal pretreatment, the content of the phosphorus of (weight) and sulphur is reduced in the molten iron:
P:0.008% S:0.008% Si:0.3% is with the quantity of slag≤100kg
Pretreated molten iron is 1250 ℃, the top and bottom combined blown converter of packing into, and the molten iron of going into top and bottom combined blown converter is 68.9 tons:
(2) top and bottom combined blown converter smelting
The converter top can blow into oxygen and be used for decarburization, and the bottom is blown into rare gas element-argon gas, to accelerate decarbonization rate, guarantees that molten steel is even.
To pour in the top and bottom combined blown converter through pretreated molten iron, add 5.76 tons of nickel plates afterwards.Oxygen decarburization, intensification.Smelt later stage reduction tapping.Oxygen consumption 3158m3, smelting cycle 46min, 70.41 tons of taps, temperature is 1655 ℃ behind the stove.
The chemical ingredients of molten steel (weight) is behind the converter smelting:
C：0.06％ Si：0.10％ Mn：0.62％
P：≤0.003％ S：≤0.006％ Ni：9.0％
Mo :≤0.5% V :≤0.5% all the other be iron and unavoidable impurities
(3) refining
I VOD (VD) operation
With overhead traveling crane ladle is put in the VOD tank car, drives tank car to handling the position.Arrive at a station 1650 ℃ of liquid steel temperatures, the thick 30mm of slag, headroom 1280mm.Less than strong mixing under the 4mbA, churning time is greater than 20min in final vacuum, and desulfurization vacuumizes removal and is mingled with, the degassing.
After VOD handled, the chemical ingredients of molten steel (weight) was:
C：0.06％ Si：0.30％ Mn：0.62％
P：0.003％ S：0.002％ Ni：9.45％
Mo :≤0.50% V :≤0.50% all the other be iron and unavoidable impurities.
II furnaceman LF preface
According to the VOD composition, mending and feeding Al is 560kg, adjusts temperature and other alloying constituent according to measuring temperature and composition situation immediately after the silicon-calcium wire line, and weak churning time 〉=15min forbids molten steel exposed.Out-station temperature: 1575 ℃.
Departures molten steel compositions (weight) are
C：0.06％ Si：0.31％ Mn：0.62％
P：0.003％ S：0.001％ Ni：9.45％
Mo :≤0.50% V :≤0.50% all the other be iron and unavoidable impurities.
(4) continuous casting steel billet
Slab during molten steel becomes by continuous casting perhaps is molded into steel ingot, again steel ingot is split into the middle slab of thick 135mm, long 1700mm, wide 1520mm by breaking down, makes low-temperature high-toughness 06Ni9 of the present invention (9%Ni) steel.
This production low-temperature high-toughness steel embodiment also can be P:0.008% in the molten iron, S:0.008%, and the preprocessed molten iron of Si:0.3% adds converter smelting, promptly from the top and bottom combined blown converter smelting (two) of the foregoing description.
Produce low-temperature high-toughness steel plate embodiment
The step of the embodiment of this production low-temperature high-toughness steel plate comprises hot metal pretreatment, top and bottom combined blown converter smelting, VOD (VD) operation, furnaceman's LF preface, continuous casting steel billet, rolling, thermal treatment and check finished product steel plate.Follow the step (four) of above-mentioned production low-temperature high-toughness steel embodiment exactly, the slab that above-mentioned continuous casting is become is rolled, thermal treatment and check.
(5) rolling, thermal treatment
I is the slab heating of making, 1150 ℃～1250 ℃ of Heating temperatures; II is when rolling process, and first roughing is rolled into the thick roughing steel plate of 100mm for 1050 ℃～1150 ℃, and finish rolling becomes the thick steel plate of 30mm again, and the rolling temperature of finish rolling is 800 ℃～900 ℃; In the III heat treatment step,, in continuous six segmentation normalizing furnaces, be heated to 860 ℃, be incubated 20 minutes the steel plate after the finish rolling system; The IV water cooling is quenched; The V tempering was 560 ℃ of insulations 32 minutes; VI and air cooling or greater than the speed of air cooling cooling tempering heat treatment; Check the rotary austenite content and the low-temperature impact toughness of finished product steel plate after the VII.This stove steel becomes the 12mm Plate Steel through four rod milling train hot rollings, and primary quenching and tempering heat treatment in continuous six segmentation normalizing furnaces are checked low melting point element content and low-temperature impact toughness afterwards.
Low melting point element content:
As：＜9ppm Sb：＜9ppm Bi：＜0.5ppm Sn：＜9ppm
Pb：＜8ppm Zn：＜9ppm。
The low-temperature impact toughness assay:
Get three impact specimens perpendicular to the steel plate rolling direction, and carry out-196 ℃ of low temperature impact tests, its-196 ℃ of low-temperature impact works are respectively 260J, 268J, 252J, average out to 260J.Low-temperature impact toughness reaches requirement.
The method of this production low-temperature high-toughness steel and steel plate thereof is applicable to the Cryogenic Steel of 06Ni9 steel and 9%Ni steel etc. nickeliferous 9%.
Explanation of nouns
VOD: the vacuum-oxygen decarbonizing refinery practice, develop by Witten, Germany company.This purifying method can be added alloy and be carried out operation such as thermometric under vacuum, be mainly used in the refining stainless steel.Be characterized in top oxygen blast under reduced pressure, stir from bottom porous plug Argon simultaneously, reduce the CO dividing potential drop, quicken reaction between carbon and oxygen.VOD is 3 initials of English Vacuum Oxygen Decarburization.
LF: ladle refining furnace, by the exploitation in 1971 of Japanese special steel company, can handle various special steels, be characterized in electric-arc heating, add that synthetic slag is washed and Argon.LF is the initial of Ladle Furnace.
The K-OBM-S top and bottom combined blown converter
Concise equipment has function separately, but arbitrary combination as required
RH: vacuum treatment device, main application be dehydrogenation, light processing, decarburization, vacuum deaeration, accurately adjust composition, improve molten steel cleanliness factor, temperature adjustment.RH technology be 1958 by Thyssen Iron And Steel Company exploitation, existing so far more than 100 RH is used for different production purposes.
VD: the concise stove of vacuum,, there is the Argon device at the bag end, by vacuumizing, the good degassing arranged, removes the effect that is mingled with, and handles very effective to various vacuum are concise with vacuum outgas.
LF → VOD (VD):, accurately adjust composition, decarburization, removal is mingled with and gas, adjusts temperature by VOD or VD again by the LF desulfurization.
LF → RH:, accurately adjust composition, decarburization, removal is mingled with and gas, adjusts temperature by RH again by the LF desulfurization.
RH → LF: by RH accurately adjust composition, decarburization, removal is mingled with and gas, again by the LF desulfurization, adjust temperature.
RH, LF, AOD also can publish " arc furnace steeling process and the equipment " published in May, 2005 referring to metallurgical industry
06Ni9 is according to GB GB/T222 iron and steel trade mark method for expressing, is general nickeliferous 9% Cryogenic Steel in the world the 9%Ni steel, rename steel for 06Ni9, also have 3.5%Ni, 5%Ni with this steel grade with a series of low-temperature high-toughness steel, but Applicable temperature difference, 9%Ni steel use temperature is-196 degree, and this series use temperature is minimum.
Claims (4)
1, a kind of method of producing the low-temperature high-toughness steel, it comprises converter smelting, refining and casting step successively, it is characterized in that: when converter smelting, the raw material that joins converter is a preprocessed molten iron, phosphorus in the molten iron and the content of sulphur (weight) are reduced to:
P：≤0.008％ S：≤0.008％ Si：≤0.4％
Pretreated molten iron is not less than 1230 ℃;
Low melting point element content in the molten steel after refining:
As：＜9ppm Sb：＜9ppm Bi：＜0.5ppm Sn：＜9ppm
Pb：＜8ppm Zn：＜9ppm。
2, the method for production low-temperature high-toughness steel according to claim 1 is characterized in that it comprises following steps in order:
(1) hot metal pretreatment
With chemical ingredients (weight) be
C：≤4.5％ P：≤0.05％ S：≤0.07％
Other are the molten iron of iron and unavoidable impurities for Si:0.4%～0.7%, and through after the common hot metal pretreatment, the content of the phosphorus of (weight) and sulphur is reduced in the molten iron:
P：≤0.008％ S：≤0.008％ Si：≤0.4％
With the pretreated molten iron top and bottom combined blown converter of packing into;
(2) top and bottom combined blown converter smelting
Pretreated molten iron is poured in the top and bottom combined blown converter, added the nickel plate afterwards, oxygen decarburization, intensification, the bottom is blown into rare gas element-argon gas, smelts later stage reduction tapping, and the chemical ingredients (weight) of smelting the back molten steel is:
C：≤0.06％ Si：0.01％～0.40％ Mn：0.20％～0.90％
P：≤0.003％ S：≤0.006％ Ni：8.50％～10.00％
Mo :≤0.5% V :≤0.5% all the other be iron and unavoidable impurities
(3) refining
After desulfurization, decarburization, dephosphorization, the degassing, benefit were fed Al, adjusted other alloying constituent, departures molten steel compositions (weight) were:
C：≤0.06％ Si：0.01％～0.40％ Mn：0.20％～0.90％
P：≤0.003％ S：≤0.002％ Ni：8.50％～10.00％
Mo :≤0.5% V :≤0.5% all the other be iron and unavoidable impurities;
(4) continuous casting steel billet
Slab during molten steel becomes by continuous casting perhaps is molded into steel ingot, again steel ingot is split into middle slab by breaking down.
3, a kind of method of producing the low-temperature high-toughness steel plate, it comprises converter smelting, refining, casting, rolling, thermal treatment step successively, it is characterized in that: when converter smelting, the raw material that joins converter is a preprocessed molten iron, and phosphorus in the molten iron and the content of sulphur (weight) are reduced to:
P：≤0.008％ S：≤0.008％ Si：≤0.4％
Pretreated molten iron is not less than 1230 ℃;
Low melting point element content in the molten steel after refining:
As：＜9ppm Sb：＜9ppm Bi：＜0.5ppm Sn：＜9ppm
Pb：＜8ppm Zn：＜9ppm。
4, the method for production low-temperature high-toughness steel plate according to claim 3 is characterized in that it comprises following steps in order:
(1) hot metal pretreatment
With chemical ingredients (weight) be
C：≤4.5％ P：≤0.05％ S：≤0.07％
Other are the molten iron of iron and unavoidable impurities for Si:0.4%～0.7%, and through after the common hot metal pretreatment, the content of the phosphorus of (weight) and sulphur is reduced in the molten iron:
P：≤0.008％ S：≤0.008％ Si：≤0.4％
With the pretreated molten iron top and bottom combined blown converter of packing into;
(2) top and bottom combined blown converter smelting
Pretreated molten iron is poured in the top and bottom combined blown converter, added the nickel plate afterwards, oxygen decarburization, intensification, the bottom is blown into rare gas element-argon gas, smelts later stage reduction tapping, and the chemical ingredients (weight) of smelting the back molten steel is:
C：≤0.06％ Si：0.01％～0.40％ Mn：0.20％～0.90％
P：≤0.003％ S：≤0.006％ Ni：8.50％～10.00％
Mo :≤0.5% V :≤0.5% all the other be iron and unavoidable impurities
(3) refining
After desulfurization, decarburization, dephosphorization, the degassing, benefit were fed Al, adjusted other alloying constituent, departures molten steel compositions (weight) were:
C：≤0.06％ Si：0.01％～0.40％ Mn：0.20％～0.90％
P：≤0.003％ S：≤0.002％ Ni：8.50％～10.00％
Mo :≤0.5% V :≤0.5% all the other be iron and unavoidable impurities;
(4) continuous casting steel billet
Slab during molten steel becomes by continuous casting perhaps is molded into steel ingot, again steel ingot is split into middle slab by breaking down;
(5) rolling, thermal treatment
I heats slab, 1150 ℃～1250 ℃ of Heating temperatures;
II is rolled into the thick steel plate of 8mm-35mm according to ordinary process when rolling process, rolling temperature is 800 ℃～1150 ℃;
In the III heat treatment step, the steel plate after rolling, be heated to more than the Ac3 point-880 ℃ in continuous six segmentation normalizing furnaces, insulation is more than 15 minutes;
The IV water cooling is quenched;
The V tempering is incubated more than 30 minutes for following 550 ℃-620 ℃ at the Ac1 point;
VI and air cooling or greater than the speed of air cooling cooling tempering heat treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100620131A CN100462466C (en) | 2007-05-26 | 2007-05-26 | Method of producing low-temperature high-toughness steel and steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100620131A CN100462466C (en) | 2007-05-26 | 2007-05-26 | Method of producing low-temperature high-toughness steel and steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101054647A true CN101054647A (en) | 2007-10-17 |
| CN100462466C CN100462466C (en) | 2009-02-18 |
Family
ID=38794699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100620131A Expired - Fee Related CN100462466C (en) | 2007-05-26 | 2007-05-26 | Method of producing low-temperature high-toughness steel and steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100462466C (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979696A (en) * | 2010-09-29 | 2011-02-23 | 山西太钢不锈钢股份有限公司 | Method for refining and casting steel for low-temperature nickel pressure container |
| CN102011048A (en) * | 2010-09-29 | 2011-04-13 | 山西太钢不锈钢股份有限公司 | Nickel-based low-temperature pressure vessel steel and manufacturing method thereof |
| CN102816909A (en) * | 2012-09-18 | 2012-12-12 | 山西太钢不锈钢股份有限公司 | Steel plate heat treatment protective agent and heat treatment method |
| CN102978332A (en) * | 2012-12-26 | 2013-03-20 | 首钢总公司 | Smelting method of 9Ni steel |
| CN104625183A (en) * | 2015-01-12 | 2015-05-20 | 南京钢铁股份有限公司 | Processing technology for obtaining 9% Ni steel high-quality milling surface |
| CN105986055A (en) * | 2015-02-25 | 2016-10-05 | 鞍钢股份有限公司 | Multi-tank molten steel continuous casting method for ultra-low phosphorus and sulfur high alloy steel in single LF furnace |
| CN106702074A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Multi-tank molten steel continuous casting method for ultra-low phosphorus and sulfur high alloy steel in single LF furnace |
| CN107955858A (en) * | 2017-11-24 | 2018-04-24 | 南阳汉冶特钢有限公司 | A kind of production method of ultra-low-carbon steel SAE1006 |
| CN108642388A (en) * | 2018-05-25 | 2018-10-12 | 张家港海锅新能源装备股份有限公司 | A kind of production method of liquefied natural gas container 06Ni9D steel forgings raw materials |
| CN108642376A (en) * | 2018-04-27 | 2018-10-12 | 大冶特殊钢股份有限公司 | One kind stainless steel containing tantalum and its smelting process |
| CN109136769A (en) * | 2018-10-17 | 2019-01-04 | 东北大学 | Low-nickel type LNG storage tank steel plate based on QT technique and preparation method thereof |
| CN110117708A (en) * | 2019-04-30 | 2019-08-13 | 河北文丰钢铁有限公司 | A kind of process for quenching of thin specification steel plate |
| CN110468248A (en) * | 2019-09-02 | 2019-11-19 | 湖南华菱湘潭钢铁有限公司 | A kind of method of dephosphorization after Converter |
| CN113549732A (en) * | 2021-07-23 | 2021-10-26 | 二重（德阳）重型装备有限公司 | Smelting method of steel grade with Sb less than or equal to 0.001wt% |
| CN113604735A (en) * | 2021-07-20 | 2021-11-05 | 山东钢铁股份有限公司 | Hot-rolled low-temperature-resistant H-shaped steel with yield strength of 420MPa and preparation method thereof |
| CN116083781A (en) * | 2023-01-06 | 2023-05-09 | 山西太钢不锈钢股份有限公司 | Manufacturing method of P92 heat-resistant steel large-specification continuous casting round billet without high-temperature ferrite structure |
| CN116536568A (en) * | 2023-04-26 | 2023-08-04 | 共享铸钢有限公司 | A smelting method for controlling antimony element in the refining process of heat-resistant steel castings |
| CN117358756A (en) * | 2023-09-26 | 2024-01-09 | 安徽富凯特材有限公司 | Rolling method for improving internal structure of ferronickel-chromium high-temperature corrosion-resistant alloy |
| CN117947239A (en) * | 2024-03-27 | 2024-04-30 | 江苏省沙钢钢铁研究院有限公司 | Low-phosphorus converter smelting method and production method for low-temperature steel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0665679A (en) * | 1992-08-24 | 1994-03-08 | Nippon Steel Corp | Steel with high toughness at low temperature for welding |
| CN100392132C (en) * | 2005-03-30 | 2008-06-04 | 宝山钢铁股份有限公司 | Steel for low temperature and high tenacity structure use and its production method |
| CN100485062C (en) * | 2005-06-11 | 2009-05-06 | 山西太钢不锈钢股份有限公司 | Method for smelting stainless steel using molten iron as raw material |
| CN1330789C (en) * | 2005-07-19 | 2007-08-08 | 武汉钢铁(集团)公司 | 600MPa grade low temperature high toughness weather corrosion resistant steel and its production method |
-
2007
- 2007-05-26 CN CNB2007100620131A patent/CN100462466C/en not_active Expired - Fee Related
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011048A (en) * | 2010-09-29 | 2011-04-13 | 山西太钢不锈钢股份有限公司 | Nickel-based low-temperature pressure vessel steel and manufacturing method thereof |
| CN101979696B (en) * | 2010-09-29 | 2012-07-25 | 山西太钢不锈钢股份有限公司 | Method for refining and casting steel for low-temperature nickel pressure container |
| CN102011048B (en) * | 2010-09-29 | 2012-11-14 | 山西太钢不锈钢股份有限公司 | Nickel-based low-temperature pressure vessel steel and manufacturing method thereof |
| CN101979696A (en) * | 2010-09-29 | 2011-02-23 | 山西太钢不锈钢股份有限公司 | Method for refining and casting steel for low-temperature nickel pressure container |
| CN102816909A (en) * | 2012-09-18 | 2012-12-12 | 山西太钢不锈钢股份有限公司 | Steel plate heat treatment protective agent and heat treatment method |
| CN102816909B (en) * | 2012-09-18 | 2014-09-24 | 山西太钢不锈钢股份有限公司 | Steel plate heat treatment protective agent and heat treatment method |
| CN102978332A (en) * | 2012-12-26 | 2013-03-20 | 首钢总公司 | Smelting method of 9Ni steel |
| CN104625183B (en) * | 2015-01-12 | 2017-07-28 | 南京钢铁股份有限公司 | A kind of processing technology on acquisition 9%Ni steel high-quality millings surface |
| CN104625183A (en) * | 2015-01-12 | 2015-05-20 | 南京钢铁股份有限公司 | Processing technology for obtaining 9% Ni steel high-quality milling surface |
| CN105986055A (en) * | 2015-02-25 | 2016-10-05 | 鞍钢股份有限公司 | Multi-tank molten steel continuous casting method for ultra-low phosphorus and sulfur high alloy steel in single LF furnace |
| CN106702074B (en) * | 2015-11-17 | 2018-05-29 | 鞍钢股份有限公司 | Multi-pot molten steel continuous casting method for ultra-low phosphorus and sulfur high alloy steel single L F furnace |
| CN106702074A (en) * | 2015-11-17 | 2017-05-24 | 鞍钢股份有限公司 | Multi-tank molten steel continuous casting method for ultra-low phosphorus and sulfur high alloy steel in single LF furnace |
| CN107955858A (en) * | 2017-11-24 | 2018-04-24 | 南阳汉冶特钢有限公司 | A kind of production method of ultra-low-carbon steel SAE1006 |
| CN108642376B (en) * | 2018-04-27 | 2019-10-15 | 大冶特殊钢股份有限公司 | One kind stainless steel containing tantalum and its smelting process |
| CN108642376A (en) * | 2018-04-27 | 2018-10-12 | 大冶特殊钢股份有限公司 | One kind stainless steel containing tantalum and its smelting process |
| CN108642388A (en) * | 2018-05-25 | 2018-10-12 | 张家港海锅新能源装备股份有限公司 | A kind of production method of liquefied natural gas container 06Ni9D steel forgings raw materials |
| CN109136769A (en) * | 2018-10-17 | 2019-01-04 | 东北大学 | Low-nickel type LNG storage tank steel plate based on QT technique and preparation method thereof |
| CN110117708B (en) * | 2019-04-30 | 2021-03-26 | 河北文丰钢铁有限公司 | Quenching method of thin steel plate |
| CN110117708A (en) * | 2019-04-30 | 2019-08-13 | 河北文丰钢铁有限公司 | A kind of process for quenching of thin specification steel plate |
| CN110468248A (en) * | 2019-09-02 | 2019-11-19 | 湖南华菱湘潭钢铁有限公司 | A kind of method of dephosphorization after Converter |
| CN113604735A (en) * | 2021-07-20 | 2021-11-05 | 山东钢铁股份有限公司 | Hot-rolled low-temperature-resistant H-shaped steel with yield strength of 420MPa and preparation method thereof |
| CN113549732A (en) * | 2021-07-23 | 2021-10-26 | 二重（德阳）重型装备有限公司 | Smelting method of steel grade with Sb less than or equal to 0.001wt% |
| CN116083781A (en) * | 2023-01-06 | 2023-05-09 | 山西太钢不锈钢股份有限公司 | Manufacturing method of P92 heat-resistant steel large-specification continuous casting round billet without high-temperature ferrite structure |
| CN116536568A (en) * | 2023-04-26 | 2023-08-04 | 共享铸钢有限公司 | A smelting method for controlling antimony element in the refining process of heat-resistant steel castings |
| CN117358756A (en) * | 2023-09-26 | 2024-01-09 | 安徽富凯特材有限公司 | Rolling method for improving internal structure of ferronickel-chromium high-temperature corrosion-resistant alloy |
| CN117358756B (en) * | 2023-09-26 | 2024-05-14 | 安徽富凯特材有限公司 | Rolling method for improving internal structure of ferronickel-chromium high-temperature corrosion-resistant alloy |
| CN117947239A (en) * | 2024-03-27 | 2024-04-30 | 江苏省沙钢钢铁研究院有限公司 | Low-phosphorus converter smelting method and production method for low-temperature steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100462466C (en) | 2009-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101054647A (en) | Method of producing low-temperature high-toughness steel and steel plate | |
| CN102703834B (en) | Grain-refined gear steel and production process thereof | |
| CN103160729B (en) | Medium-carbon microalloyed steel for engineering machinery caterpillar chain piece and production process thereof | |
| CN103556069B (en) | A kind of gas cylinder seamless large-diameter pipes and manufacture method thereof | |
| CN102277534B (en) | Hot rolled steel section for gas cylinders and production method thereof | |
| CN105369150B (en) | A kind of superhigh intensity armor manufacture method | |
| CN110055459B (en) | Medium-alloy ultrahigh-strength-toughness rare earth steel and preparation method thereof | |
| CN113046627B (en) | 345 MPa-grade weather-proof bridge steel and manufacturing method thereof | |
| CN108660377A (en) | The preparation method of seamless steel pipe and seamless steel pipe | |
| CN114480987A (en) | Rare earth-containing NM600 wear-resistant steel plate and preparation method thereof | |
| CN111286677B (en) | Ultralow-sulfur low-aluminum high-nitrogen steel and smelting method | |
| CN114134420A (en) | Steel for blowout prevention pipe for oil and gas drilling and production method | |
| CN101792843B (en) | Production process of Nb-containing mill coil for automobile | |
| CN112359284A (en) | High-strength low-temperature-toughness wear-resistant steel plate HY550NME and production method thereof | |
| CN104988400A (en) | Titanium-microalloyed boron-containing steel and smelting method thereof | |
| CN108977612B (en) | Smelting method of high-strength atmospheric corrosion resistant bolt steel | |
| JP5708349B2 (en) | Steel with excellent weld heat affected zone toughness | |
| CN107904485B (en) | 420MPa grades of cold rolling low-alloy high-strength steels of yield strength and its manufacturing method | |
| CN113718158A (en) | Production method of steel for high-strength saw blade of mine | |
| CN109097665B (en) | Smelting method of high-strength atmospheric corrosion resistant bolt steel | |
| CN115976413B (en) | Wear-resistant alloy cast steel and its preparation method and application | |
| CN106521332A (en) | Steel plate for resisting hydrogen cracking by stress and production method thereof | |
| CN102102138B (en) | Method for solving copper segregation in steel | |
| CN103014521A (en) | High-hardness high-toughness wear-resistant steel and production method thereof | |
| CN103643127A (en) | Thick steel plate for 500 MPa-grade hydrogen-contacting devices and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090218 Termination date: 20160526 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |