CN107190201B - LPG ship steel and manufacturing method - Google Patents
LPG ship steel and manufacturing method Download PDFInfo
- Publication number
- CN107190201B CN107190201B CN201710582344.1A CN201710582344A CN107190201B CN 107190201 B CN107190201 B CN 107190201B CN 201710582344 A CN201710582344 A CN 201710582344A CN 107190201 B CN107190201 B CN 107190201B
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- steel
- steel plate
- temperature
- lpg ship
- low
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Classifications
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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
- 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
-
- 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
-
- 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
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
Abstract
The invention discloses a kind of LPG ship steel, it is characterized by: the chemical element component and its weight percent that contain are as follows: carbon 0.02~0.09%, silicon 0.01~0.15%, manganese 14.1~16.9%, phosphorus≤0.008%, sulphur≤0.001%, nickel 0.05~1.0%, surplus are iron and inevitable impurity.Present component and -120 DEG C of ballistic works of steel of technique production are above 80J, with Mn for the LPG ship steel of Ni is with good economic efficiency and social benefit, LPG ship storage tank is built with steel of the invention, lower production costs, with good economic efficiency and social benefit.
Description
Technical field
The invention belongs to high alloy-structural steel manufacturing fields, and in particular to a kind of LPG ship steel and manufacture
Method.
Background technique
LPG ship storage tank is mostly used Ni with steel and carries out alloying, is managed by using suitable manufacturing process
The comprehensive mechanical property thought guarantees the safety and service performance of liquefied petroleum gas storage tank.Though 9Ni, 5Ni steel have good synthesis
Performance, but expensive alloy element Ni content is higher, high production cost.
Chinese invention patent application (application number 201610857699.2, applying date 2016.9.27) discloses a kind of raising
The method of 1Ni9 low-temperature steel impact flexibility will specially quench and the quenched 1Ni9 low-temperature steel of two-phase section is with 1~5 DEG C/min's
Rate of temperature fall is down to -140 DEG C~-196 DEG C, heat preservation 24 hours or more, is then warmed to room temperature, is carried out with the rate of 1~5 DEG C/min
Conventional tempering.Chinese invention patent (patent No. CN201510068091.7, applying date 2015.2.9) discloses a kind of " pressure
Force container low-temperature steel plate and its production method ", the mass percentage of the steel plate chemical component are as follows: C 0.03~0.07%,
Si 0.15~0.3%, Ni 6.8~8.0%, Mn0.6~0.9%, P≤0.005%, S≤0.005%, Al 0.02~
0.04%, 0.01~0.2% Mo, Nb 0.01~0.09%, surplus are Fe and inevitable impurity.Two patented technologies
Involved steel grade belongs to typical high Ni steel alloy, and production process is complicated, and lumber recovery is low, high production cost.
Chinese invention patent (patent No. CN201410823858.8, applying date 2014.12.26) discloses a kind of " 130mm
~150mm thickness ultra low temperature steel plate and its production method ", it includes the chemical components of following mass percent: C:0.06~
0.09, Si:0.25~0.40, Mn:1.60~1.70, P :≤0.010, S :≤0.003, Nb:0.02~0.03, Ni:0.60~
0.70, Als:0.20~0.40, other is Fe and relict element.Its production method taken include: converter smelting, LF refining,
VD vacuum outgas, ingot casting casting, Heating Steel Ingots, rolling, slow cooling, heat treatment.The present invention passes through reasonable Design of Chemical Composition,
LF+VD technique guarantees the cleanliness of steel, yield strength control in 290~365MPa, tensile strength control 435~
545MPa, elongation control can control in 24%~29%, -70 DEG C of V-type impact absorbing in 157~318J, -80 DEG C of V-type impacts
Absorption can control in >=70J.Another Chinese invention patent application (application number CN201510049359.2, the applying date
2015.1.31) disclose " a method of using low-alloy steel make ultralow temperature steel ", set low-alloy steel chemical component and
Mass percentage content is as follows: C is 0.19~0.21, Si is 0.20~0.38, Mn is 1.7~2, Al≤0.01, Cu≤
0.005, S≤0.015, P≤0.015, RE are 0.1~0.3, Pb≤0.0015, Sn≤0.001.Above-mentioned low-alloy steel is carried out
Melting, to reduce low-melting compound and brittle substance, in the heat of oxidation of melting, decarburized amount is not less than 0.5%, and there can be no mistakes
Oxidation causes later period carburetting, can just enter reduction period when molten steel phosphorus content is not more than 0.02%；In the reduction period of melting, make white
Slag desulfurization when sulphur is less than 0.025%, carries out tapping casting.Low-alloy steel controls S, P, particularly P to minimum when melting
Degree reduces low-melting compound and brittle substance；To improve low-temperature impact work.Chinese invention patent (the patent No.
CN201510423279.9, applying date 2015.7.17) disclose " a kind of high-strength low temperature resistant steel and its heat treatment process ", by with
The element of lower mass percent forms: nickel 2.0~7.05%；Carbon 0.02~0.1%；Silicon 0.02~0.1%；Manganese 0.60~
8.00%；Chromium 0.3~0.5%；Molybdenum 0.05~0.6%；Copper 0.02~0.3%；Aluminium 0.03~2.0%；Phosphorus≤0.010%；Sulphur
≤ 0.002%；Nitrogen 0.004~0.010%；Oxygen 0.0005~0.002%；Calcium 0.0005~0.005%；Surplus is iron.It is above-mentioned
Three patented technologies belong to typical low-alloy high-strength steel kind, though having good comprehensive mechanical property, its deficiency is that heat is swollen
Swollen coefficient vary with temperature it is larger, be not suitable for manufacture low-temperature liquefaction petroleum gas storage tank.
Chinese invention patent application (application number 201610197044.7, applying date 2016.3.31) discloses a kind of " no nickel
High-strength low-yield ratio in manganese low-temperature steel and preparation method thereof ", chemical component and its mass fraction are as follows: C:0.03~
0.06%, Mn:4.5~6.0%, Si:0.15~0.23%, Als:0.015~0.030%, Mo:0.1~0.3%, S≤
0.006%, P≤0.009%, surplus are Fe and impurity element, the metallographic structure of the low-temperature steel be tempering ferrite lath beam+
The heterogeneous structure of rotary austenite；The present invention passes through the alloy design method of substitute nickel with manganese and reasonable rolling and heat treatment work
Skill makes material obtain superior low-temperature toughness, and cost substantially reduces compared with other low-temperature steels.Another Chinese invention patent application
(application number CN201510720341.0, applying date 2015.10.30) discloses " the high-strength low temperature resistant steel of one kind and its producer
Method " is made of the element of following mass percent: C:0.05~0.2%, Si:0.1~0.26%, Mn:0.60~8.00%,
Cr:0.4~0.8%, Mo:0.12~0.28%, Cu≤0.03%, Al:0.02~0.06%, Ti:0.010~0.018%, P
≤ 0.012%, S≤0.005%, N:0.004~0.01%, O≤0.0012%, H≤0.00012%, Ca:0.001~
0.005%, Sb:0.0001~0.0005%, Sn≤0.001%, As≤0.005%, B≤0.0010%, V≤0.08%, Nb
≤ 0.03%, surplus Fe；Finished steel low-temperature impact power of the invention significantly improves, -20 DEG C of impact toughness values 260~
350J, -40 DEG C of impact toughness values are in 240~300J.Above-mentioned two patented technologies belong to Mn steel alloy in typical case, but only can guarantee -40
DEG C ballistic work, it is impossible to be used in build the liquefied petroleum gas storage tank under -70 DEG C~-110 DEG C environment.
Summary of the invention
It is high-strength with poor Ni present invention aim to provide a kind of LPG ship steel and manufacturing method
Steel, the structural alloy steel instead of existing ni content up to 5~9%.
To achieve the above object, the technical solution adopted by the present invention is that: LPG ship steel, the chemistry contained
Elemental composition and its weight percent are as follows: carbon 0.02~0.09%, silicon 0.01~0.15%, manganese 14.1~16.9%, phosphorus≤
0.008%, sulphur≤0.001%, nickel 0.05~1.0%, surplus are iron and inevitable impurity.
Further, the chemical element component and its weight percent contained are as follows: carbon 0.051~0.09%, silicon 0.07~
0.15%, manganese 15.21~16.0%, phosphorus≤0.0071%, sulphur≤0.0007%, nickel 0.05~0.56%, surplus is for iron and not
Evitable impurity.
Further, the weight percent of the phosphorus is preferably 0.0034~0.0071%.
Further, the weight percent of the sulphur is preferably 0.0005~0.0007%.
Principle is described as follows:
Alloying element Mn (manganese) expansion austenite region is added in ferrous alloy steel can when Mn content reaches certain level
The steel alloy of single austenite structure is obtained, there is good low-temperature impact toughness, therefore, using high-content in the present invention
Mn；
C (carbon): alloying element C, which belongs to, in steel expands austenitic area field element, adds suitable alloying element C, can ensure steel
Material some strength；
Mn (manganese): adding enough Mn contents in steel, austenite structure can be made to be stabilized to room temperature state, obtains good
Comprehensive performance；
Ni (nickel): in steel add Ni alloying element, can stable austenite tissue, avoid decomposing, reduce the object of steel
Reason and mechanical property, considerably reduce the content of the expensive alloy element Ni element of typical 5Ni steel, reduce production cost；
P (phosphorus), S (sulphur): P, S reduce the physical property and mechanical property of steel in steel, therefore the lower P, S content the better in steel,
If but control content is too low, and production technology cost is caused to increase.
A kind of manufacturing method of LPG ship steel as described above, comprising the following steps:
1) it smelts, cast
It is uniformly mixed by the ingredient and weight percent and forms molten iron, then handled molten iron through deep de- S, then true with RH
Empty set system refined molten steel, is finally cast as slab；
2) it rolls
One-time continuous is rolled into steel plate；
3) it quenches
Steel plate in step 2) is quenched processing, steel plate heating temperature is 900~1000 DEG C, soaking time is 30~
100 minutes；
4) cooling
Water cooling to room temperature forms required steel plate.
Further, in the step 2), the finishing temperature of rolling is 850~1150 DEG C.
There is processing hardening tendency in the higher steel of Mn content, therefore slab needs once during the rolling process in process
Continuous rolling is completed, and need to complete to roll in higher temperature, so by finishing temperature control at 850 DEG C or more.At steel plate quenching
Reason: heating temperature is 900~1000 DEG C, and soaking time is 30~100 minutes, and water cooling, its object is to by shape in manufacturing process
At carbide decompose and be dissolved into matrix to obtain good comprehensive performance.
Compared with prior art, the invention has the following advantages that -120 DEG C of steel impacts of present component and technique production
Function is above 80J, with Mn for the LPG ship steel of Ni is with good economic efficiency and social benefit, is sent out with this
Bright steel builds LPG ship storage tank, lower production costs, with good economic efficiency and social benefit.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, convenient for more clearly understanding the present invention, but it
Limiting the invention.
According to the when production method requirement of chemical element component of the present invention, weight percent, five embodiments are prepared for, and
Two comparative examples, respectively embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, comparative example 1, comparison
Embodiment 2 smelts and has rolled 7 batches of steel plates.The chemical element component weight hundred of five embodiments and two comparative examples
Ratio is divided to be shown in Table 1, wherein surplus is Fe and inevitable impurity.Production process control parameter and plate quality situation are shown in Table 2.
The chemical component of 1 five embodiments of table and two comparative examples compares (wt%)
2 five embodiments of table and two comparative example production process controls and plate property situation
As can be seen from Table 2,80J is above in -120 DEG C of ballistic works by the steel that present component and technique produce.Without
The compared steel of composition of steel range or/and production technology of the present invention not within the scope of the present invention is very low in -120 DEG C of ballistic works.
Claims (1)
1. a kind of manufacturing method of LPG ship steel, it is characterised in that: the following steps are included:
1) it smelts, cast
It is uniformly mixed by default ingredient and weight percent and forms molten iron, then handle molten iron through deep de- S, then with RH vacuum system
System refined molten steel, is finally cast as slab；
2) it rolls
One-time continuous is rolled into steel plate, and the finishing temperature of rolling is 850~1150 DEG C；
3) it quenches
Steel plate in step 2) is quenched processing, steel plate heating temperature is 900~1000 DEG C, and soaking time is 30~100 points
Clock；
4) cooling
Water cooling to room temperature forms required steel plate；
Default chemical element component and its weight percent are as follows: carbon 0.02~0.09%, silicon 0.01~0.15%, manganese 14.1~
16.9%, phosphorus≤0.008%, sulphur≤0.001%, nickel 0.05~1.0%, surplus are iron and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710582344.1A CN107190201B (en) | 2017-07-17 | 2017-07-17 | LPG ship steel and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710582344.1A CN107190201B (en) | 2017-07-17 | 2017-07-17 | LPG ship steel and manufacturing method |
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| Publication Number | Publication Date |
|---|---|
| CN107190201A CN107190201A (en) | 2017-09-22 |
| CN107190201B true CN107190201B (en) | 2019-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710582344.1A Active CN107190201B (en) | 2017-07-17 | 2017-07-17 | LPG ship steel and manufacturing method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363970B (en) * | 2020-03-30 | 2022-03-22 | 南京钢铁股份有限公司 | Nickel-free LPG (liquefied Petroleum gas) steel plate for ship and manufacturing method thereof |
Citations (6)
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|---|---|---|---|---|
| JPH05117812A (en) * | 1991-10-29 | 1993-05-14 | Sumitomo Metal Ind Ltd | Steel material having excellent antifouling property |
| CN101111622A (en) * | 2005-02-02 | 2008-01-23 | 克里斯塔尔公司 | Austenitic steel having high strenght and formability method of producing said steel and use thereof |
| CN101568660A (en) * | 2006-12-26 | 2009-10-28 | Posco公司 | Composite steel and method of thermally treating the same |
| CN101717885A (en) * | 2009-12-22 | 2010-06-02 | 上海大学 | Low-carbon twin crystal induction plasticity steel with high strength and high plasticity |
| CN103328670A (en) * | 2010-12-28 | 2013-09-25 | 埃克森美孚研究工程公司 | High manganese containing steels for oil gas and petrochemical applications |
| WO2016105002A1 (en) * | 2014-12-24 | 2016-06-30 | 주식회사 포스코 | Low-temperature steel sheet with excellent surface processing quality and method for manufacturing same |
-
2017
- 2017-07-17 CN CN201710582344.1A patent/CN107190201B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05117812A (en) * | 1991-10-29 | 1993-05-14 | Sumitomo Metal Ind Ltd | Steel material having excellent antifouling property |
| CN101111622A (en) * | 2005-02-02 | 2008-01-23 | 克里斯塔尔公司 | Austenitic steel having high strenght and formability method of producing said steel and use thereof |
| CN101568660A (en) * | 2006-12-26 | 2009-10-28 | Posco公司 | Composite steel and method of thermally treating the same |
| CN101717885A (en) * | 2009-12-22 | 2010-06-02 | 上海大学 | Low-carbon twin crystal induction plasticity steel with high strength and high plasticity |
| CN103328670A (en) * | 2010-12-28 | 2013-09-25 | 埃克森美孚研究工程公司 | High manganese containing steels for oil gas and petrochemical applications |
| WO2016105002A1 (en) * | 2014-12-24 | 2016-06-30 | 주식회사 포스코 | Low-temperature steel sheet with excellent surface processing quality and method for manufacturing same |
Non-Patent Citations (1)
| Title |
|---|
| 浦项LNG储罐用高锰钢正式应用并量产;文德;《世界金属导报》;20150602;第B01版 |
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